us-gaap |
Lessee, Operating Lease, Liability, to be Paid |
Amount of lessee's undiscounted obligation for lease payment for operating lease. |
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us-gaap |
Payments for (Proceeds from) Other Investing Activities |
Amount of cash (inflow) outflow from investing activities classified as other. |
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us-gaap |
Payments of Ordinary Dividends, Common Stock |
Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. |
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us-gaap |
Payments to Acquire Productive Assets |
The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets. |
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us-gaap |
Pension and Other Postretirement Benefits Cost (Reversal of Cost) |
Amount of cost (reversal of cost) for pension and other postretirement benefits. |
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us-gaap |
Liability, Defined Benefit Plan, Noncurrent |
Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as noncurrent. |
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us-gaap |
Payment for Pension Benefits |
Amount of cash outflow for pension benefit. Includes, but is not limited to, employer contribution to fund plan asset and payment to retiree. Excludes other postretirement benefit. |
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us-gaap |
Other Long-term Investments |
Amount of long-term investments classified as other. |
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us-gaap |
Other Nonoperating Expense |
Amount of expense related to nonoperating activities, classified as other. |
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us-gaap |
Other Nonoperating Income |
Amount of income related to nonoperating activities, classified as other. |
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us-gaap |
Common Stock, Shares, Outstanding |
Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. |
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us-gaap |
Common Stocks, Including Additional Paid in Capital |
Amount of par value plus amounts in excess of par value or issuance value for common stock issued. |
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dei |
Entity Common Stock, Shares Outstanding |
Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument. |
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dei |
Entity Public Float |
The aggregate market value of the voting and non-voting common equity held by non-affiliates computed by reference to the price at which the common equity was last sold, or the average bid and asked price of such common equity, as of the last business day of the registrant's most recently completed second fiscal quarter. |
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us-gaap |
Accounts Payable, Current |
Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). |
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us-gaap |
Accounts Payable, Related Parties, Current |
Amount for accounts payable to related parties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). |
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us-gaap |
Accounts Receivable, after Allowance for Credit Loss, Current |
Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current. |
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us-gaap |
Accrued Environmental Loss Contingencies, Noncurrent |
Carrying value of the obligation (known or estimated) arising from requirements to perform activities to remediate one or more sites, payable after twelve months or beyond the next operating cycle if longer. |
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us-gaap |
Accumulated Deferred Investment Tax Credit |
The noncurrent portion of the reserve for accumulated deferred investment tax credits as of the balance sheet date. This is the remaining investment credit, which will reduce the cost of services collected from ratepayers by a ratable portion over the investment's regulatory life. |
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us-gaap |
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment |
Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. |
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us-gaap |
Defined Benefit Plan, Expected Future Benefit Payment, Year Three |
Amount of benefit for defined benefit plan expected to be paid in third fiscal year following current fiscal year. |
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us-gaap |
Additional Paid in Capital, Common Stock |
Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. Includes only common stock transactions (excludes preferred stock transactions). May be called contributed capital, capital in excess of par, capital surplus, or paid-in capital. |
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us-gaap |
APIC, Share-based Payment Arrangement, Increase for Cost Recognition |
Amount of increase to additional paid-in capital (APIC) for recognition of cost for award under share-based payment arrangement. |
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|
us-gaap |
Accounts Receivable, Allowance for Credit Loss |
Amount of allowance for credit loss on accounts receivable. |
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us-gaap |
Accounts Receivable, Allowance for Credit Loss, Current |
Amount of allowance for credit loss on accounts receivable, classified as current. |
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us-gaap |
Asset Impairment Charges |
Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. |
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us-gaap |
Asset Retirement Obligation |
The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. |
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us-gaap |
Asset Retirement Obligation, Accretion Expense |
Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability. |
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us-gaap |
Asset Retirement Obligation, Liabilities Incurred |
Amount of asset retirement obligations incurred during the period. |
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us-gaap |
Asset Retirement Obligation, Liabilities Settled |
Amount of asset retirement obligations settled, or otherwise disposed of, during the period. This may include asset retirement obligations transferred to third parties associated with the sale of a long-lived asset. |
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us-gaap |
Asset Retirement Obligation, Revision of Estimate |
Amount of increase (decrease) in the asset retirement obligation from changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation. |
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us-gaap |
Assets |
Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. |
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us-gaap |
Assets, Current |
Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. |
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us-gaap |
Capitalization, Long-term Debt and Equity |
This element represents the total consolidated (as applicable) capitalization of the entity which is comprised of its long-term debt and equity instruments. The table may be detailed by subsidiary (legal entity) and include information by type of debt or equity detailed by instrument. |
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us-gaap |
Cash and Cash Equivalents, at Carrying Value |
Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. |
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us-gaap |
Cash and Cash Equivalents, Period Increase (Decrease) |
Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes. |
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us-gaap |
Common Stock, Including Additional Paid in Capital (Deprecated 2013-01-31) |
Aggregate of par value plus amounts in excess of par value or issuance value (in cases of no-par value stock) for common stock held by shareholders. Aggregate value for common stock issued and outstanding. |
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us-gaap |
Common Stock, Par or Stated Value Per Share |
Face amount or stated value per share of common stock. |
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us-gaap |
Common Stock, Shares Authorized |
The maximum number of common shares permitted to be issued by an entity's charter and bylaws. |
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us-gaap |
Common Stock, Shares, Issued |
Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. |
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us-gaap |
Comprehensive Income (Loss), Net of Tax, Attributable to Parent |
Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners. |
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us-gaap |
Construction in Progress, Gross |
Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service. |
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us-gaap |
Cost of Domestic Regulated Electric (Deprecated 2018-01-31) |
Cost of electricity sold during the reporting period, operations of which is regulated by a federal or state agency. |
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us-gaap |
Cost of Goods and Services Sold |
The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities. |
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us-gaap |
Current Federal Tax Expense (Benefit) |
Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations. |
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us-gaap |
Current Income Tax Expense (Benefit) |
Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations. |
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|
us-gaap |
Current State and Local Tax Expense (Benefit) |
Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations. |
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us-gaap |
Customer Deposits, Current |
The current portion of money or property received from customers which is either to be returned upon satisfactory contract completion or applied to customer receivables in accordance with the terms of the contract or the understandings. |
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us-gaap |
Customer Refund Liability, Current |
Current regulatory liabilities generally represent obligations to make refunds to customers for various reasons including overpayment. |
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us-gaap |
Debt Instrument, Face Amount |
Face (par) amount of debt instrument at time of issuance. |
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us-gaap |
Debt Instrument, Interest Rate, Stated Percentage |
Contractual interest rate for funds borrowed, under the debt agreement. |
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us-gaap |
Debt Instrument, Unamortized Discount |
Amount, after accumulated amortization, of debt discount. |
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us-gaap |
Deferred Federal Income Tax Expense (Benefit) |
Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations. |
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us-gaap |
Deferred Income Taxes and Tax Credits |
Amount of deferred income tax expense (benefit) and income tax credits. |
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us-gaap |
Deferred Revenue, Noncurrent |
Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable, classified as noncurrent. |
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us-gaap |
Deferred State and Local Income Tax Expense (Benefit) |
Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations. |
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us-gaap |
Deferred Storm and Property Reserve Deficiency, Current |
Carrying amount as of the balance sheet date of capitalized storm costs of a regulated entity that are expected to be recoverable through rate adjustments within one year or the normal operating cycle, if longer. |
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us-gaap |
Deferred Tax Assets, Derivative Instruments |
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from derivative instruments. |
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us-gaap |
Deferred Tax Assets, Gross, Current |
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards classified as current. |
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us-gaap |
Deferred Tax Assets, Gross, Noncurrent |
Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences and carryforwards, classified as noncurrent. |
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us-gaap |
Deferred Tax Assets, Net of Valuation Allowance, Current |
Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards classified as current. |
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us-gaap |
Deferred Tax Assets, Operating Loss Carryforwards |
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. |
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us-gaap |
Deferred Tax Assets, Other |
Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other. |
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us-gaap |
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Postretirement Benefits |
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from postretirement benefits. |
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us-gaap |
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities |
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from accrued liabilities. |
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us-gaap |
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts |
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from the allowance for doubtful accounts. |
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us-gaap |
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Asset Retirement Obligations |
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from asset retirement obligations. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset. |
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us-gaap |
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Other |
Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences from reserves and accruals, classified as other. |
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us-gaap |
Deferred Tax Liabilities, Gross, Noncurrent |
Gross amount of noncurrent deferred tax liabilities, which result from applying the applicable tax rate to taxable temporary differences pertaining to each jurisdiction to which the entity is obligated to pay income tax. |
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us-gaap |
Deferred Tax Liabilities, Net, Noncurrent |
Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences, with jurisdictional netting and classified as noncurrent. |
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us-gaap |
Deferred Tax Liabilities, Prepaid Expenses |
Amount of deferred tax consequences attributable to taxable temporary differences derived from prepaid expenses. |
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us-gaap |
Deferred Tax Liabilities, Property, Plant and Equipment |
Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment. |
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us-gaap |
Deferred Tax Liabilities, Regulatory Assets |
Amount of deferred tax liability attributable to taxable temporary differences from regulatory assets. |
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us-gaap |
Defined Benefit Plan, Plan Assets, Contributions by Employer |
Amount of contribution received by defined benefit plan from employer which increases plan assets. |
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us-gaap |
Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation |
Amount of decrease in accumulated postretirement benefit obligation from one-percentage-point decrease in assumed health care cost trend rate. |
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us-gaap |
Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components |
Amount of decrease in service and interest cost components of net periodic postretirement benefit cost from one-percentage-point decrease in assumed health care cost trend rate. |
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us-gaap |
Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation |
Amount of increase in accumulated postretirement benefit obligation from one-percentage-point increase in assumed health care cost trend rate. |
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us-gaap |
Defined Benefit Plan, Effect of One Percentage Point Increase on Service and Interest Cost Components |
Amount of increase in service and interest cost components of net periodic postretirement benefit cost from one-percentage-point increase in assumed health care cost trend rate. |
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us-gaap |
Defined Benefit Plan, Effect of Plan Amendment on Accumulated Benefit Obligation (Deprecated 2017-01-31) |
The amount of increase or decrease in the accumulated benefit obligation related to the effects of a change in the substantive terms of an existing defined benefit pension plan or the initiation of a new plan. A plan amendment may increase or decrease benefits, including those attributed to years of service already rendered. |
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us-gaap |
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year (Deprecated 2013-01-31) |
The employer's best estimate, as soon as it can be reasonably determined, of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position. Estimated contributions may be presented in the aggregate combining (1) contributions required by funding regulations or laws, (2) discretionary contributions, and (3) noncash contributions. |
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us-gaap |
Defined Benefit Plan, Expected Future Benefit Payment, after Year Five for Next Five Years |
Amount of benefit for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following current fiscal year. |
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us-gaap |
Defined Benefit Plan, Expected Future Benefit Payment, Year One |
Amount of benefit for defined benefit plan expected to be paid in next fiscal year following current fiscal year. |
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us-gaap |
Defined Benefit Plan, Expected Future Benefit Payment, Year Five |
Amount of benefit for defined benefit plan expected to be paid in fifth fiscal year following current fiscal year. |
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us-gaap |
Defined Benefit Plan, Expected Future Benefit Payment, Year Four |
Amount of benefit for defined benefit plan expected to be paid in fourth fiscal year following current fiscal year. |
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us-gaap |
Defined Benefit Plan, Plan Assets, Amount |
Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. |
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us-gaap |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) |
Amount of net periodic benefit cost (credit) for defined benefit plan. |
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us-gaap |
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment |
Amount of increase (decrease) in benefit obligation of defined benefit plan from change in terms of existing plan or initiation of new plan. |
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us-gaap |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement |
Amount of gain (loss) recognized in net periodic benefit (cost) credit from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk related to obligation and assets used to effect settlement. |
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us-gaap |
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year (Deprecated 2017-01-31) |
Amount of employer's best estimate of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position. |
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us-gaap |
Derivative Asset |
Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. |
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us-gaap |
Derivative Financial Instruments, Liabilities, Fair Value Disclosure (Deprecated 2013-01-31) |
Derivative instrument obligations meeting the definition of a liability which the Company is a party to as of the balance sheet date. |
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us-gaap |
Derivative Liability, Current |
Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. |
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us-gaap |
Derivative Liability, Noncurrent |
Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. |
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us-gaap |
Dividends, Common Stock |
Amount of paid and unpaid common stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK). |
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us-gaap |
Dividends, Common Stock, Cash |
Amount of paid and unpaid common stock dividends declared with the form of settlement in cash. |
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us-gaap |
Due to Related Parties, Current |
Carrying amount as of the balance sheet date of obligations due all related parties. For classified balance sheets, represents the current portion of such liabilities (due within one year or within the normal operating cycle if longer). |
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us-gaap |
Effective Income Tax Rate Reconciliation, Percent |
Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. |
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us-gaap |
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent |
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments. |
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us-gaap |
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent |
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit). |
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us-gaap |
Effective Income Tax Rate Reconciliation, Tax Contingency, Percent |
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income tax contingencies. Includes, but not limited to, domestic tax contingency, foreign tax contingency, state and local tax contingency, and other contingencies. |
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us-gaap |
Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Percent |
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to investment tax credit. |
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us-gaap |
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Percent |
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other tax credits. |
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us-gaap |
Electric Domestic Regulated Revenue (Deprecated 2018-01-31) |
Revenue derived from the regulated (by a federal, state, or local government or agency) generation, transmission and distribution of electricity. |
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us-gaap |
Employee-related Liabilities, Current |
Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). |
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us-gaap |
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount |
Amount of cost not yet recognized for nonvested award under share-based payment arrangement. |
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us-gaap |
Share-based Payment Arrangement, Expense, Tax Benefit |
Amount of tax benefit for recognition of expense of award under share-based payment arrangement. |
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us-gaap |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value |
Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. |
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us-gaap |
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property |
Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property. |
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us-gaap |
Gain (Loss) on Disposition of Property Plant Equipment |
Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. |
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|
us-gaap |
Gross Profit |
Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. |
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us-gaap |
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest |
Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. |
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us-gaap |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest |
Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments. |
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us-gaap |
Income Tax Expense (Benefit) |
Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. |
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us-gaap |
Income Taxes Paid, Net |
The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes. |
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us-gaap |
Increase (Decrease) in Accounts Payable |
The increase (decrease) during the reporting period in the aggregate amount of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. |
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us-gaap |
Interest Payable, Current |
Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). |
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us-gaap |
Investment Income, Interest |
Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities. |
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us-gaap |
Increase (Decrease) in Accounts Receivable |
The increase (decrease) during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services. |
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us-gaap |
Increase (Decrease) in Income Taxes Payable |
The increase (decrease) during the period in the amount due for taxes based on the reporting entity's earnings or attributable to the entity's income earning process (business presence) within a given jurisdiction. |
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us-gaap |
Increase (Decrease) in Customer Deposits |
The increase (decrease) during the period in the amount of customer money held in customer accounts, including security deposits, collateral for a current or future transactions, initial payment of the cost of acquisition or for the right to enter into a contract or agreement. |
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us-gaap |
Increase (Decrease) in Deferred Fuel Costs |
The increase (decrease) during the reporting period in carrying amount of capitalized fuel costs of a regulated entity that are expected to be recoverable through rate adjustments within one year or the normal operating cycle, if longer. |
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us-gaap |
Increase (Decrease) in Derivative Liabilities |
The increase (decrease) during the period in the carrying value of derivative instruments reported as liabilities that are due to be disposed of within one year (or the normal operating cycle, if longer). |
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us-gaap |
Increase (Decrease) in Due to Related Parties, Current |
The increase (decrease) during the reporting period in the aggregate amount of obligations to be paid to the following types of related parties: a parent company and its subsidiaries; subsidiaries of a common parent; an entity and trust for the benefit of employees, such as pension and profit-sharing trusts that are managed by or under the trusteeship of the entities' management; an entity and its principal owners, management, or member of their immediate families, affiliates, or other parties with the ability to exert significant influence. |
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us-gaap |
Increase (Decrease) in Employee Related Liabilities |
The increase (decrease) during the reporting period in the aggregate amount of obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. |
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us-gaap |
Increase (Decrease) in Gas Balancing Receivable |
Change in the balance of the gas balancing receivable account. Gas imbalances occur when the entity sells more or less than its entitled ownership percentage of total gas production. If the entity receives less than it is entitled, the underproduction is recorded as a receivable. |
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us-gaap |
Increase (Decrease) in Interest Payable, Net |
The increase (decrease) during the reporting period in interest payable, which represents the amount owed to note holders, bond holders, and other parties for interest earned on loans or credit extended to the reporting entity. |
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us-gaap |
Increase (Decrease) in Inventories |
The increase (decrease) during the reporting period in the aggregate value of all inventory held by the reporting entity, associated with underlying transactions that are classified as operating activities. |
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us-gaap |
Increase (Decrease) in Other Current Assets |
Amount of increase (decrease) in current assets classified as other. |
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us-gaap |
Increase (Decrease) in Other Current Liabilities |
Amount of increase (decrease) in current liabilities classified as other. |
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us-gaap |
Increase (Decrease) in Other Noncurrent Assets |
Amount of increase (decrease) in noncurrent assets classified as other. |
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us-gaap |
Increase (Decrease) in Other Noncurrent Liabilities |
Amount of increase (decrease) in noncurrent operating liabilities classified as other. |
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us-gaap |
Increase (Decrease) in Other Regulatory Assets |
The increase (decrease) during the reporting period in the value of other assets that are created when regulatory agencies permits public utilities to defer costs to the balance sheet. |
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us-gaap |
Increase (Decrease) in Regulatory Liabilities |
The increase (decrease) during the reporting period in regulated liabilities. Regulated liabilities are created when regulatory agency permits an entity to defer revenues to the balance sheet. |
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us-gaap |
Increase (Decrease) in Unbilled Receivables |
The increase (decrease) during the reporting period of the amount of revenue for work performed for which billing has not occurred, net of uncollectible accounts. |
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us-gaap |
Interest Costs Capitalized |
Amount of interest capitalized during the period. |
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us-gaap |
Interest Expense |
Amount of the cost of borrowed funds accounted for as interest expense. |
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us-gaap |
Interest Expense, Long-term Debt |
Aggregate amount of interest paid or due on all long-term debt. |
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us-gaap |
Interest Expense, Short-term Borrowings |
The aggregate interest expense incurred on short-term borrowings including commercial paper and Federal funds purchased and securities sold under agreements to repurchase. |
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us-gaap |
Interest Paid, Excluding Capitalized Interest, Operating Activities |
Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount. |
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us-gaap |
Investment Tax Credit |
The amount deducted from an entities' taxes, reflecting a percentage of an amount invested in certain assets spread over the useful life of those assets; includes deferred investment tax credits. |
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us-gaap |
Lessee, Operating Lease, Liability, to be Paid, Year One |
Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). |
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us-gaap |
Lessee, Operating Lease, Liability, to be Paid, Year Five |
Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). |
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us-gaap |
Lessee, Operating Lease, Liability, to be Paid, Year Four |
Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). |
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us-gaap |
Lessee, Operating Lease, Liability, to be Paid, Year Three |
Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). |
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us-gaap |
Lessee, Operating Lease, Liability, to be Paid, Year Two |
Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). |
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us-gaap |
Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year |
Amount of lessee's undiscounted obligation for lease payment for operating lease having initial or remaining lease term in excess of one year to be paid in remainder of current fiscal year. |
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us-gaap |
Lessee, Operating Lease, Liability, Undiscounted Excess Amount |
Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease. |
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us-gaap |
Letters of Credit Outstanding, Amount |
The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. |
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us-gaap |
Liabilities, Current |
Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer. |
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us-gaap |
Liabilities, Other than Long-term Debt, Noncurrent |
Aggregated carrying amounts of obligations as of the balance sheet date, excluding long-term debt, incurred as part of the normal operations that are expected to be paid after one year or beyond the normal operating cycle, if longer. Alternate captions include Total Deferred Credits and Other Liabilities. |
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us-gaap |
Lines of Credit, Fair Value Disclosure |
Fair value portion of contractual arrangement with a lender under which borrowings can be made up to a specific amount at any point in time. |
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us-gaap |
Long-term Debt |
Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. |
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us-gaap |
Long-term Debt, Current Maturities |
Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. |
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us-gaap |
Long-Term Debt, Maturity, Year One |
Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). |
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us-gaap |
Long-Term Debt, Maturity, Year Five |
Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). |
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us-gaap |
Long-Term Debt, Maturity, Year Four |
Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). |
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us-gaap |
Long-Term Debt, Maturity, Year Three |
Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). |
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us-gaap |
Operating Lease, Weighted Average Discount Rate, Percent |
Weighted average discount rate for operating lease calculated at point in time. |
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us-gaap |
Other Assets, Current |
Amount of current assets classified as other. |
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us-gaap |
Long-term Purchase Commitment, Amount |
The minimum amount the entity agreed to spend under the long-term purchase commitment. |
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us-gaap |
Long-term Debt, Weighted Average Interest Rate, at Point in Time |
Weighted average interest rate of long-term debt outstanding calculated at point in time. |
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us-gaap |
Net Cash Provided by (Used in) Financing Activities |
Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. |
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us-gaap |
Net Cash Provided by (Used in) Investing Activities |
Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. |
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us-gaap |
Net Cash Provided by (Used in) Operating Activities |
Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. |
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us-gaap |
Net Income (Loss) Attributable to Parent |
The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. |
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us-gaap |
Nonoperating Income (Expense) |
The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). |
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us-gaap |
Operating Expenses |
Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense. |
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us-gaap |
Operating Income (Loss) |
The net result for the period of deducting operating expenses from operating revenues. |
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us-gaap |
Operating Lease, Cost |
Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability. |
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us-gaap |
Operating Lease, Liability |
Present value of lessee's discounted obligation for lease payments from operating lease. |
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us-gaap |
Operating Lease, Right-of-Use Asset |
Amount of lessee's right to use underlying asset under operating lease. |
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us-gaap |
Operating Leases, Future Minimum Payments Due |
Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year. |
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us-gaap |
Operating Leases, Future Minimum Payments Due, Next Twelve Months |
Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. |
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us-gaap |
Operating Leases, Future Minimum Payments, Due in Five Years |
Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. |
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us-gaap |
Operating Leases, Future Minimum Payments, Due in Four Years |
Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. |
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us-gaap |
Operating Leases, Future Minimum Payments, Due in Three Years |
Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. |
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us-gaap |
Operating Leases, Future Minimum Payments, Due in Two Years |
Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. |
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us-gaap |
Operating Leases, Future Minimum Payments, Due Thereafter |
Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. |
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us-gaap |
Operating Leases, Rent Expense, Net |
Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. |
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us-gaap |
Other Assets, Noncurrent |
Amount of noncurrent assets classified as other. |
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us-gaap |
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax (Deprecated 2012-01-31) |
Net of tax effect change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges after taxes. A cash flow hedge is a hedge of the exposure to variability in the cash flows of a recognized asset or liability or a forecasted transaction that is attributable to a particular risk. The change includes an entity's share of an equity investee's increase or decrease in deferred hedging gains or losses. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label. |
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us-gaap |
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax Effect (Deprecated 2012-01-31) |
Total tax effect of the change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. The change includes an entity's share of an equity investee's increase or decrease in deferred hedging gains or losses. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label. |
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us-gaap |
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax |
Amount after tax and reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss). |
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us-gaap |
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax |
Amount of tax expense (benefit), after reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss). |
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us-gaap |
Other Comprehensive Income (Loss), Net of Tax |
Amount after tax and reclassification adjustments of other comprehensive income (loss). |
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us-gaap |
Other Comprehensive Income (Loss), Net of Tax (Deprecated 2012-01-31) |
This element represents Other Comprehensive Income or Loss, Net of Tax, for the period. Includes deferred gains or losses on qualifying hedges, unrealized holding gains or losses on available-for-sale securities, minimum pension liability, and cumulative translation adjustment. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label. |
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us-gaap |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax |
Amount after tax of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss). |
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us-gaap |
Other Inventory, Supplies, Gross |
Amount before valuation and LIFO reserves of other supplies used within the manufacturing or production process expected to be consumed within one year or operating cycle, if longer. |
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us-gaap |
Other Liabilities, Current |
Amount of liabilities classified as other, due within one year or the normal operating cycle, if longer. |
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us-gaap |
Other Liabilities, Noncurrent |
Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer. |
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us-gaap |
Prepaid Expense, Current |
Amount of asset related to consideration paid in advance for costs that provide economic benefits within a future period of one year or the normal operating cycle, if longer. |
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us-gaap |
Prior Period Reclassification Adjustment |
The amount of a reclassification adjustment made to prior period financial statement amounts. |
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us-gaap |
Proceeds from Contribution in Aid of Construction |
The cash inflow from developers, builders, governmental agencies and municipalities that provide the entity with cash to extend its construction services to their properties. |
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us-gaap |
Proceeds from Contributions from Parent |
The cash inflow from parent as a source of financing that is recorded as additional paid in capital. |
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us-gaap |
Proceeds from Issuance of Long-term Debt |
The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer. |
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us-gaap |
Proceeds from (Repayments of) Lines of Credit |
The net cash inflow or cash outflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with either short term or long term maturity that is collateralized (backed by pledge, mortgage or other lien in the entity's assets). |
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us-gaap |
Proceeds from (Repayments of) Short-term Debt |
The net cash inflow or outflow for borrowing having initial term of repayment within one year or the normal operating cycle, if longer. |
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us-gaap |
Proceeds from Sale of Productive Assets |
The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets. |
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us-gaap |
Property, Plant and Equipment, Gross |
Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. |
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us-gaap |
Property, Plant and Equipment, Net |
Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. |
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us-gaap |
Public Utilities, Allowance for Funds Used During Construction, Additions |
Total increase in earnings in the period representing the cost of equity (based on assumed rate of return) and/or borrowed funds (based on interest rate) used to finance construction of regulated assets, which is expected to be recovered through rate adjustments. |
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us-gaap |
Allowance for Funds Used During Construction, Capitalized Interest |
Amount capitalized of allowance for funds used during construction. |
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us-gaap |
Public Utilities, Allowance for Funds Used During Construction, Rate |
Effective rate, including composite rate, of cost of financing additions to qualifying regulated assets, commonly called allowance for funds used during construction. |
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us-gaap |
Public Utilities, Approved Debt Capital Structure, Percentage |
Percentage of public utility's approved debt to capital, including debt and equity. |
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us-gaap |
Public Utilities, Approved Equity Capital Structure, Percentage |
Percentage of public utility's approved equity to capital, including debt and equity. |
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us-gaap |
Public Utilities, Approved Rate Increase (Decrease), Amount |
Amount of public utility's approved rate increase (decrease) by regulatory agency. |
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us-gaap |
Public Utilities, Approved Return on Equity, Percentage |
Percentage of public utility's approved return on equity. |
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us-gaap |
Public Utilities, Interim Rate Increase (Decrease), Amount |
Amount of public utility's interim rate increase (decrease) allowed while waiting final decision of regulatory agency. |
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us-gaap |
Public Utilities, Inventory |
The period end amount for a type of inventory held by the utility in a schedule of inventories. |
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us-gaap |
Public Utilities, Property, Plant and Equipment, Amount of Acquisition Adjustments, Related Accumulated Depreciation |
Amount of increase (decrease) for acquisition adjustments on accumulated depreciation included in long-lived, physical assets used to produce goods and services and not intended for resale for utilities. |
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us-gaap |
Public Utilities, Property, Plant and Equipment, Plant in Service |
Period end amount of total gross PPE. |
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us-gaap |
Public Utilities, Requested Rate Increase (Decrease), Amount |
Amount of public utility's requested rate increase (decrease) with regulatory agency. |
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us-gaap |
Redemption Premium |
The excess of the (1) fair value of consideration transferred to the holders of a security in excess of (2) the carrying amount of the security reported on the registrant's balance sheet, which will be deducted from net earnings to derive net earnings available to common shareholders. This amount is generally an adjustment considered in the computation of earnings per share. |
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us-gaap |
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount |
Amount of valuation and qualifying accounts and reserves. |
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us-gaap |
Regulatory Assets, Noncurrent |
Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are not expected to be recovered through revenue sources within one year or the normal operating cycle if longer. |
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us-gaap |
Regulatory Liability, Current |
The amount for the individual regulatory current liability as itemized in a table of regulatory current liabilities as of the end of the period. |
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us-gaap |
Regulatory Liability, Noncurrent |
The amount for the individual regulatory noncurrent liability as itemized in a table of regulatory noncurrent liabilities as of the end of the period. |
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us-gaap |
Reimbursement Revenue (Deprecated 2018-01-31) |
Repayment received or receivable for expenses incurred on behalf of a client or customer, other than those reimbursements received by landlords from tenants. |
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us-gaap |
Repayments of Long-term Debt |
The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. |
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us-gaap |
Repayments of Other Long-term Debt |
Amount of cash outflow for the payment of debt classified as other, maturing after one year or the operating cycle, if longer. |
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us-gaap |
Retained Earnings (Accumulated Deficit) |
The cumulative amount of the reporting entity's undistributed earnings or deficit. |
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us-gaap |
Revenue from Contract with Customer, Excluding Assessed Tax |
Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. |
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us-gaap |
Revenues |
Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). |
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us-gaap |
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability |
Amount of increase in right-of-use asset obtained in exchange for operating lease liability. |
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us-gaap |
Share-based Payment Arrangement, Noncash Expense |
Amount of noncash expense for share-based payment arrangement. |
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us-gaap |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted |
Net number of non-option equity instruments granted to participants. |
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us-gaap |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized |
Number of shares authorized for issuance under share-based payment arrangement. |
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us-gaap |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number |
The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. |
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us-gaap |
Stock Issued During Period, Shares, New Issues |
Number of new stock issued during the period. |
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us-gaap |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period |
Number of share options (or share units) exercised during the current period. |
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us-gaap |
Taxes, Miscellaneous |
All taxes not related to income of the entity or excise or sales taxes levied on the revenue of the entity that are not reported elsewhere. These taxes could include production, real estate, personal property, and pump tax. |
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us-gaap |
Taxes Payable, Current |
Carrying value as of the balance sheet date of obligations incurred and payable for statutory income, sales, use, payroll, excise, real, property and other taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). |
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us-gaap |
Treasury Stock Acquired, Average Cost Per Share |
Total cost of shares repurchased divided by the total number of shares repurchased. |
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us-gaap |
Treasury Stock, Shares, Acquired |
Number of shares that have been repurchased during the period and are being held in treasury. |
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us-gaap |
Unamortized Debt Issuance Expense |
The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset. |
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us-gaap |
Unrecognized Tax Benefits |
Amount of unrecognized tax benefits. |
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us-gaap |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued |
Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. |
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us-gaap |
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions |
Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. |
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us-gaap |
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions |
Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. |
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us-gaap |
Unrecognized Tax Benefits, Period Increase (Decrease) |
Amount of increase (decrease) in unrecognized tax benefits attributable to uncertain tax positions taken in tax returns. |
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us-gaap |
Unrecognized Tax Benefits that Would Impact Effective Tax Rate |
The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. |
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us-gaap |
Unrecorded Unconditional Purchase Obligation, to be Paid, Year Two |
Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). |
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us-gaap |
Unrecorded Unconditional Purchase Obligation, to be Paid, Year Three |
Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). |
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us-gaap |
Unrecorded Unconditional Purchase Obligation |
Amount of the unrecorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts). |
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us-gaap |
Unrecorded Unconditional Purchase Obligation, Imputed Interest |
If disclosed, the amount of imputed interest necessary to reduce an unconditional purchase obligation to present value on an unrecorded unconditional purchase obligation. |
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us-gaap |
Utilities Operating Expense, Purchased Power under Long-term Contracts |
Amount of operating expense for purchased power procured under arrangements extending beyond one year or the normal operating cycle, if longer, by regulated operation. |
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us-gaap |
Accumulated Other Comprehensive Income (Loss), Net of Tax |
Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. |
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us-gaap |
Common Stock, Value, Issued |
Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity. |
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us-gaap |
Deferred Fuel Cost |
Carrying amount as of the balance sheet date of capitalized fuel costs of a regulated entity that are expected to be recoverable through rate adjustments within one year or the normal operating cycle, if longer. |
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us-gaap |
Deferred Income Tax Expense (Benefit) |
Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations. |
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us-gaap |
Deferred Tax Assets, Tax Credit Carryforwards |
Amount, before allocation of a valuation allowances, of deferred tax assets attributable to deductible tax credit carryforwards including, but not limited to, research, foreign, general business, alternative minimum tax, and other deductible tax credit carryforwards. |
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us-gaap |
Deferred Tax Assets, Tax Deferred Expense, Other |
Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences from provisions, reserves, allowances, and accruals, classified as other. |
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us-gaap |
Deferred Tax Liabilities, Prepaid Pension Costs (Deprecated 2013-01-31) |
The amount as of the balance sheet date of the estimated future tax effects attributable to the difference between the tax basis of pension liabilities funded in advance and the basis of a prepaid pension asset determined in accordance with generally accepted accounting principles. The difference in basis of such costs will increase future taxable income when such basis difference reverses. Prepaid pension costs represented the cumulative employer's contributions in excess of net pension cost recognized, before the adoption of the recognition provisions of FAS 158. Under FAS 158, prepaid pension costs are no longer recognized in the statement of financial position. |
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us-gaap |
Defined Benefit Plan, Expected Future Benefit Payment, Year Two |
Amount of benefit for defined benefit plan expected to be paid in second fiscal year following current fiscal year. |
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us-gaap |
Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year (Deprecated 2017-01-31) |
The assumed health care cost trend rate for the next year used to measure the expected cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status. |
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us-gaap |
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement |
Amount of (increase) decrease to benefit obligation of defined benefit plan from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Includes, but is not limited to, lump-sum cash payment to participant in exchange for right to receive specified benefits, purchase of nonparticipating annuity contract and change from remeasurement. |
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us-gaap |
Defined Benefit Plan, Plan Assets, Payment for Settlement |
Amount of payment, which decreases plan assets of defined benefit plan, for irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Transaction constituting settlement includes, but is not limited to, making lump-sum cash payment to participant in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contract. |
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us-gaap |
Defined Contribution Plan, Cost |
Amount of cost for defined contribution plan. |
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us-gaap |
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay |
Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. |
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us-gaap |
Defined Contribution Plan, Employer Matching Contribution, Percent of Match |
Percentage employer matches of the employee's percentage contribution matched. |
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us-gaap |
Depreciation, Depletion and Amortization, Nonproduction |
The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production. |
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us-gaap |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |
Percentage of domestic federal statutory tax rate applicable to pretax income (loss). |
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us-gaap |
Effective Income Tax Rate Reconciliation, Deduction, Medicare Prescription Drug Benefit, Percent |
Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to deduction for Medicare prescription drug benefit subsidy. |
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us-gaap |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price |
The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. |
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us-gaap |
Increase (Decrease) in Accounts Payable, Related Parties |
The increase (decrease) during the reporting period in the obligations due for goods and services provided by the following types of related parties: a parent company and its subsidiaries, subsidiaries of a common parent, an entity and trust for the benefit of employees, such as pension and profit-sharing trusts that are managed by or under the trusteeship of the entities' management, an entity and its principal owners, management, or member of their immediate families, affiliates, or other parties with the ability to exert significant influence. |
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us-gaap |
Lessee, Operating Lease, Liability, to be Paid, after Year Five |
Amount of lessee's undiscounted obligation for lease payment for operating lease due after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). |
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us-gaap |
Liabilities |
Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future. |
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us-gaap |
Liabilities and Equity |
Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any. |
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us-gaap |
Long-Term Debt, Maturity, Year Two |
Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). |
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us-gaap |
Long-term Debt, Excluding Current Maturities |
Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. |
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us-gaap |
Other Assets, Miscellaneous, Noncurrent |
Amount of other miscellaneous assets expected to be realized or consumed after one year or normal operating cycle, if longer. |
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us-gaap |
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax (Deprecated 2012-01-31) |
Pre tax change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges, net of reclassifications into earnings during the period. A cash flow hedge is a hedge of the exposure to variability in the cash flows of a recognized asset or liability or a forecasted transaction that is attributable to a particular risk. Includes an entity's share of an equity investee's increase or decrease in deferred hedging gains or losses. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label. |
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us-gaap |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax |
Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss). |
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us-gaap |
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax (Deprecated 2013-01-31) |
Net of tax amount of the income statement impact of the reclassification adjustment of accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges realized in net income. Also includes reclassification adjustments of an entity's share of an equity investee's deferred hedging gain (loss) realized in net income. |
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us-gaap |
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Tax (Deprecated 2013-01-31) |
Tax effect of the income statement impact of the reclassification adjustment of accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges realized in net income. Also includes reclassification adjustments of an entity's share of an equity investee's deferred hedging gain (loss) realized in net income. |
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us-gaap |
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax |
Amount of tax expense (benefit), before reclassification adjustments, related to increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss). |
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us-gaap |
Other Cost and Expense, Operating |
The total amount of other operating cost and expense items that are associated with the entity's normal revenue producing operation. |
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us-gaap |
Postemployment Benefits Liability |
The carrying amount as of the balance sheet date of the obligations recognized for the various benefits provided to former or inactive employees, their beneficiaries, and covered dependents after employment but before retirement. |
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us-gaap |
Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity |
The component of the allowance for funds used during construction during the period based on an assumed rate of return on equity funds used in financing the construction of regulated assets. |
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us-gaap |
Regulatory Assets, Current |
Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer. Such costs are capitalized if they meet both of the following criteria: a. It is probable that future revenue in an amount at least equal to the capitalized cost will result from inclusion of that cost in allowable costs for rate-making purposes. b. Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather than to provide for expected levels of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent clearly be to permit recovery of the previously incurred cost. |
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us-gaap |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value |
Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. |
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us-gaap |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value |
Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. |
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us-gaap |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number |
Number of options outstanding, including both vested and non-vested options. |
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us-gaap |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price |
Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. |
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us-gaap |
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price |
Weighted average price at which option holders acquired shares when converting their stock options into shares. |
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us-gaap |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value |
Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. |
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us-gaap |
Short-term Debt |
Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer. |
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us-gaap |
Short-term Debt, Weighted Average Interest Rate, at Point in Time |
Weighted average interest rate of short-term debt outstanding calculated at point in time. |
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us-gaap |
Stockholders' Equity Attributable to Parent |
Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. |
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us-gaap |
Unamortized Loss Reacquired Debt, Noncurrent |
Unamortized Loss on Reacquired Debt is the loss incurred upon reacquisition or refinancing of debt, is treated as a deferred charge and amortized over the life of the new debt issued. |
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us-gaap |
Unbilled Receivables, Current |
Amount received for services rendered and products shipped, but not yet billed, for non-contractual agreements due within one year or the normal operating cycle, if longer. |
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us-gaap |
Unrecorded Unconditional Purchase Obligation, to be Paid, Year Five |
Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). |
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us-gaap |
Unrecorded Unconditional Purchase Obligation, to be Paid, Year One |
Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). |
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us-gaap |
Unrecorded Unconditional Purchase Obligation, to be Paid, Year Four |
Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). |
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us-gaap |
SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense |
Amount of increase in valuation and qualifying accounts and reserves from charge to cost and expense. |
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us-gaap |
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction |
Amount of decrease in valuation and qualifying accounts and reserves. |
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