2.2.0.7 false CONDENSED STATEMENTS OF INCOME (Unaudited) (USD $) 001000 - Statement - CONDENSED STATEMENTS OF INCOME (Unaudited) true false In Millions false false 1 USD false false u000 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 2 USD false false u000 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 3 USD false false u000 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 4 USD false false u000 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ 2 Income Statement [Abstract] 0 us-gaap_IncomeStatementAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 3 OPERATING REVENUES 1 us-gaap_ElectricDomesticRegulatedRevenue us-gaap true credit duration No definition available. false false false false false false false false false false false false 1 true true false false 512800000 512.8 false false false 2 true true false false 425300000 425.3 false false false 3 true true false false 956800000 956.8 false false false 4 true true false false 762000000 762.0 false false false xbrli:monetaryItemType monetary Revenue derived from the regulated (by a federal, state, or local government or agency) generation, transmission and distribution of electricity. 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No authoritative reference available. false 5 Gross margin on revenues 1 us-gaap_GrossProfit us-gaap true credit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 282000000 282.0 false false false 2 false true false false 237000000 237.0 false false false 3 false true false false 475200000 475.2 false false false 4 false true false false 402700000 402.7 false false false xbrli:monetaryItemType monetary Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. 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Such amounts may include: (a) dividends, (b) interest on securities, (c) profits on securities (net of losses), and (d) miscellaneous other income items. 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If the entity does not present consolidated financial statements, the amount of profit or loss for the period, net of income taxes. 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