CONSOLIDATED STATEMENT OF OTHER COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net income (loss)	$ 1,574	$ 1,298	$ 753
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Unrealized holding gains (losses) on available-for-sale securities arising during period	(63)	201	143
Reclassification adjustment for net (gains) losses included in net income	(10)	(37)	(38)
Unrealized holding gains (losses) on cash flow hedge derivatives arising during period	24	58	1
Reclassification adjustment for net (gains) losses on cash flow hedge derivatives included in net income	(54)	(45)	(39)
Net actuarial loss (gain)	8	(21)	6
Other Comprehensive Income (Loss) Net Of Tax	(95)	156	73
Comprehensive income	1,479	1,454	826
Comprehensive income attributable to noncontrolling interests	(2)	1
Comprehensive income attributable to Bancorp	$ 1,481	$ 1,453	$ 826