CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME Unaudited (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Other Comprehensive Income
Net income (loss)	$ 319	$ 412
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Unrealized holding gains (losses) on available-for-sale securities arising during period	113	(36)
Reclassification adjustment for net gains included in net income	(3)	5
Unrealized holding gains on cash flow hedge derivatives arising during period	10	1
Reclassification adjustment for net gains on cash flow hedge derivatives included in net income	(7)	(14)
Reclassification of amounts to net periodic benefit costs	1	2
Other comprehensive income (loss), Net of Tax	114	(42)
Comprehensive income	433	370
Comprehensive income attributable to noncontrolling interests	1	(10)
Comprehensive income attributable to Bancorp	$ 432	$ 380