Consolidated Statements of Changes in Stockholder's Equity (Unaudited) (USD $) In Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest
Balance, Beginning at Dec. 31, 2009	$ 9,580	$ 136	$ 5,195	$ 4,900	$ (651)	$ 0
Cumulative effect from change in accounting for VIEs	272					272
Comprehensive income:
Net income (loss)	224			231		(7)
Other comprehensive income (loss), net of tax:
Net change in unrealized gains on cash flow hedges	(32)				(32)
Net change in unrealized losses on securities	155				155
Net change in pension and other benefits	8				8
Total comprehensive income, net of tax	355
Stock-based compensation - restricted stock units	0
Other	13					13
Net change	640			231	131	278
Balance, Ending at Jun. 30, 2010	10,220	136	5,195	5,131	(520)	278
Balance, Beginning at Dec. 31, 2010	10,391	136	5,198	5,468	(677)	266
Comprehensive income:
Net income (loss)	470			477		(7)
Other comprehensive income (loss), net of tax:
Net change in unrealized losses on securities	42				42
Foreign currency translation adjustment	1				1
Net change in pension and other benefits	21				21
Total comprehensive income, net of tax	534
Stock-based compensation - restricted stock units	1		1
Other	11					11
Net change	546		1	477	64	4
Balance, Ending at Jun. 30, 2011	$ 10,937	$ 136	$ 5,199	$ 5,945	$ (613)	$ 270