CONSOLIDATED STATEMENT OF OTHER COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement Of Income And Comprehensive Income [Table]
Net income (loss)	$ 1,706	$ 1,483	$ 1,826
Other Comprehensive Income (Loss), Net of Tax
Unrealized holding gains (losses) on available-for-sale securities arising during period	(227)	378	(295)
Reclassification adjustment for net gains included in net income	(10)	(24)	4
Unrealized holding gains (losses) on cash flow hedge derivatives arising during period	48	39	(8)
Reclassification adjustment for net gains on cash flow hedge derivatives included in net income	(49)	(29)	(29)
Net actuarial gain (loss) arising during the period	(5)	(25)	25
Reclassification of amounts to net periodic benefit costs	11	8	10
Other Comprehensive Income (Loss) Net Of Tax	(232)	347	(293)
Comprehensive income	1,474	1,830	1,533
Comprehensive income attributable to noncontrolling interests	(6)	2	(10)
Comprehensive income attributable to Bancorp	$ 1,480	$ 1,828	$ 1,543