CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) Balance Sheet Parenthetical (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Cash and Cash Equivalents	$ 348	$ 207
Allowance for Doubtful Accounts Receivable, Current	3	3
Accounts and notes receivable, net	252	261
Other	50	65
Regulatory assets	2,926	2,999
Variable Interest Entity, Primary Beneficiary [Member]
Cash and Cash Equivalents	149	207
Accounts and notes receivable, net	69	60
Other	42	41
Regulatory assets	$ 3,084	$ 3,179