CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement Of Income And Comprehensive Income
Net income	$ 2,512	$ 2,193	$ 2,180
Other Comprehensive Income (Loss), Net of Tax:
Unrealized holding gains (losses) on available-for-sale securities arising during the year	1,046	(371)	21
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	(7)	9	4
Unrealized holding gains (losses) on cash flow hedge derivatives arising during the year	275	169	(7)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	(13)	2	(12)
Net actuarial gain (loss) arising during the year	(5)	1	1
Reclassification of amounts to net periodic benefit costs	8	7	7
Other comprehensive income (loss), net of tax	1,304	(183)	14
Comprehensive income	3,816	2,010	2,194
Comprehensive income attributable to noncontrolling interests	0	0	0
Comprehensive income attributable to Bancorp	$ 3,816	$ 2,010	$ 2,194