CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Statement of Other Comprehensive Income [Abstract]
Net income (loss)	$ (1,045)		$ 1,018		$ 1,564
Net change in unrealized gains (losses), net of tax as applicable on:
Securities available-for-sale, not other-than-temporarily impaired	109		786		165
Other-than-temporarily impaired debt securities available-for-sale	0	[1]	1	[1]	55	[1]
Other-than-temporarily impaired securities held-to-maturity	0	[1]	11	[1]	93	[1]
Adjustment to reverse other-than-temporarily impairment on securities held-to-maturity due to deconsolidation of a variable interest entity	0		142		0
Derivatives designated as cash flow hedges	28		(142)		13
Unrecognized actuarial gains, transition obligation and prior service costs relating to pension and postretirement benefits, net of tax	6		(3)		(5)
Other comprehensive income, net of tax	143		795		321
Comprehensive income (loss)	$ (902)		$ 1,813		$ 1,885

[1] During 2012 and 2011, there were no OTTI losses on securities recognized in other revenues and no OTTI losses on securities were recognized in the non-credit component in accumulated other comprehensive income (loss) (“AOCI”), net of tax. During 2010, other-than-temporary impairment OTTI losses on securities available-for-sale and held-to-maturity totaling $79 million were recognized in other revenues and losses in the non-credit component recognized in AOCI, net of tax were not significant.