CONSOLIDATED STATEMENT OF OTHER COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other Comprehensive Income
Net income	$ 1,483	$ 1,826	$ 1,574
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Unrealized holding gains (losses) on available-for-sale securities arising during period	378	(295)	(63)
Reclassification adjustment for net gains included in net income	(24)	4	(10)
Unrealized holding gains (losses) on cash flow hedge derivatives arising during period	39	(8)	24
Reclassification adjustment for net gains on cash flow hedge derivatives included in net income	(29)	(29)	(54)
Net actuarial gain (loss) arising during the period	(25)	25	(5)
Reclassification of amounts to net periodic benefit costs	8	10	13
Other Comprehensive Income (Loss) Net Of Tax	347	(293)	(95)
Comprehensive income	1,830	1,533	1,479
Comprehensive income attributable to noncontrolling interests	2	(10)	(2)
Comprehensive income attributable to Bancorp	$ 1,828	$ 1,543	$ 1,481