CONSOLIDATED STATEMENT OF OTHER COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Other Comprehensive Income
Net income	$ 1,826	$ 1,574	$ 1,298
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Unrealized holding gains (losses) on available-for-sale securities arising during period	(295)	(63)	201
Reclassification adjustment for net gains included in net income	4	10	37
Unrealized holding gains (losses) on cash flow hedge derivatives arising during period	(8)	24	58
Reclassification adjustment for net gains on cash flow hedge derivatives included in net income	(29)	54	45
Net actuarial gain (loss) arising during the period	(25)	(5)	(33)
Reclassification of amounts to net periodic benefit costs	10	13	12
Other Comprehensive Income (Loss) Net Of Tax	(293)	(95)	156
Comprehensive income	1,533	1,479	1,454
Comprehensive income attributable to noncontrolling interests	(10)	(2)	1
Comprehensive income attributable to Bancorp	$ 1,543	$ 1,481	$ 1,453