Consolidated Statement of Comprehensive Income (Loss) (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Consolidated Statement of Comprehensive Income (Loss) [Abstract]
Net loss	$ (155)	$ (21)
Net change in unrealized gains (losses), net of tax, on:
Derivatives classified as cash flow hedges	55	65
Securities available-for-sale, not other-than-temporarily impaired	(9)	(11)
Foreign currency translation adjustments, net of tax	5	5
Other comprehensive income	51	59
Total comprehensive income (loss)	$ (104)	$ 38