CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME Unaudited - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement Of Income And Comprehensive Income
Net income (loss)	$ 704	$ 305
Other Comprehensive Income (Loss), Net of Tax
Unrealized holding gains (losses) on available-for-sale securities arising during period	(460)	15
Reclassification adjustment for net (gains) losses included in net income	7	1
Unrealized holding gains (losses) on cash flow hedge derivatives arising during period	(7)	(3)
Reclassification adjustment for net gains on cash flow hedge derivatives included in net income	(1)	(5)
Reclassification of amounts to net periodic benefit costs	1	1
Other comprehensive income (loss), Net of Tax	(460)	9
Comprehensive income	244	314
Comprehensive income attributable to noncontrolling interests	0	0
Comprehensive income attributable to Bancorp	$ 244	$ 314