Consolidated Statements of Changes in Equity (USD $) In Millions, unless otherwise specified	Total	Members Equity	Accumulated Other Comprehensive Income (Loss)
Balance at Dec. 31, 2012	$ 34,329	$ 34,574	$ (245)
Increase (Decrease) in Member's Equity [Roll Forward]
Cash distributions to Parent	(1,000)	(1,000)	0
Comprehensive income, net of tax	799	798	1
Balance at Mar. 31, 2013	$ 34,128	$ 34,372	$ (244)

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

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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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