CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME Unaudited - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement Of Income And Comprehensive Income
Net income (loss)	$ 586	$ 367	$ 1,290	$ 672
Other Comprehensive Income (Loss), Net of Tax
Unrealized holding gains (losses) on available-for-sale securities arising during period	(167)	93	(627)	108
Reclassification adjustment for net (gains) losses included in net income	0	0	7	1
Unrealized holding gains (losses) on cash flow hedge derivatives arising during period	3	5	(4)	2
Reclassification adjustment for net gains on cash flow hedge derivatives included in net income	0	(4)	(1)	(9)
Reclassification of amounts to net periodic benefit costs	1	1	2	2
Other comprehensive income (loss), Net of Tax	(163)	95	(623)	104
Comprehensive income	423	462	667	776
Comprehensive income attributable to noncontrolling interests	0	0	0	0
Comprehensive income attributable to Bancorp	$ 423	$ 462	$ 667	$ 776