CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME Unaudited - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement Of Income And Comprehensive Income
Net income (loss)	$ 433	$ 1,014	$ 1,721	$ 1,685
Other Comprehensive Income (Loss), Net of Tax
Unrealized holding gains (losses) on available-for-sale securities arising during period	(207)	22	(834)	130
Reclassification adjustment for net (gains) losses included in net income	0	1	7	2
Unrealized holding gains (losses) on cash flow hedge derivatives arising during period	(19)	0	(24)	2
Reclassification adjustment for net gains on cash flow hedge derivatives included in net income	2	(2)	2	(11)
Net actuarial gain (loss) arising during the year	(2)	(2)	(2)	(3)
Reclassification of amounts to net periodic benefit costs	3	3	5	6
Other comprehensive income (loss)	(223)	22	(846)	126
Comprehensive income	210	1,036	875	1,811
Comprehensive income attributable to noncontrolling interests	0	0	0	0
Comprehensive income attributable to Bancorp	$ 210	$ 1,036	$ 875	$ 1,811