Consolidated Statement of Comprehensive Income (Loss) (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Consolidated Statement of Comprehensive Income (Loss) [Abstract]
Net loss	$ (258)	$ (48)	$ (413)	$ (69)
Net change in unrealized gains (losses), net of tax, on:
Derivatives designated as cash flow hedges	(5)	(5)	50	60
Securities available-for-sale, not other-than-temporarily impaired	16	8	7	(3)
Other-than-temporarily impaired debt securities available-for-sale		(1)		(1)
Pension and post retirement benefit plan adjustment	1	1	1	1
Foreign currency translation adjustments, net of tax	(5)	1		6
Other Comprehensive Income (Loss), Net of Tax	7	4	58	63
Total comprehensive income (loss)	$ (251)	$ (44)	$ (355)	$ (6)