CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement Of Income And Comprehensive Income
Net income (loss)	$ 1,560	$ 1,706	$ 1,483
Other Comprehensive Income (Loss), Net of Tax
Unrealized holding gains (losses) on available-for-sale securities arising during the year	(130)	(227)	378
Reclassification adjustment for net (gains) losses included in net income	(7)	(10)	(24)
Unrealized holding gains (losses) on cash flow hedge derivatives arising during the year	19	48	39
Reclassification adjustment for net gains on cash flow hedge derivatives included in net income	(31)	(49)	(29)
Net actuarial gain (loss) arising during the year	(1)	(5)	(25)
Reclassification of amounts to net periodic benefit costs	12	11	8
Other comprehensive income (loss), Net of Tax	(138)	(232)	347
Comprehensive income	1,422	1,474	1,830
Comprehensive income attributable to noncontrolling interests	(4)	(6)	2
Comprehensive income attributable to Bancorp	$ 1,426	$ 1,480	$ 1,828