CONSOLIDATED BALANCE SHEETS (PARENTHETICAL) Consolidated Balance Sheets (Parentheticals) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Cash and cash equivalents ($290 and $207 related to VIEs, respectively)	$ 290	$ 207
Allowance for Doubtful Accounts Receivable, Current	3	3
Accounts and notes receivable, net ($58 and $60 related to VIEs, respectively), less bad debt reserve of $3 and $3, respectively	237us-gaap_AccountsAndNotesReceivableNet	261us-gaap_AccountsAndNotesReceivableNet
Other ($47 and $41 related to VIEs, respectively)	74us-gaap_OtherAssetsCurrent	65us-gaap_OtherAssetsCurrent
Regulatory assets ($2,738 and $3,179 related to VIEs, respectively)	2,629us-gaap_RegulatoryAssetsNoncurrent	3,001us-gaap_RegulatoryAssetsNoncurrent
Variable Interest Entity, Primary Beneficiary [Member]
Cash and cash equivalents ($290 and $207 related to VIEs, respectively)	290	207
Accounts and notes receivable, net ($58 and $60 related to VIEs, respectively), less bad debt reserve of $3 and $3, respectively	58	60
Other ($47 and $41 related to VIEs, respectively)	47	41
Regulatory assets ($2,738 and $3,179 related to VIEs, respectively)	$ 2,738	$ 3,179

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