CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME Unaudited (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net income (loss)	$ 412	$ 430
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Unrealized holding gains (losses) on available-for-sale securities arising during period	(36)	7
Reclassification adjustment for net gains included in net income	5	(5)
Unrealized holding gains on cash flow hedge derivatives arising during period	1	6
Reclassification adjustment for net (gains) losses on cash flow hedge derivatives included in net income	(14)	(13)
Net actuarial loss	2	3
Other comprehensive income (loss)	(42)	(2)
Comprehensive income	370	428
Comprehensive income attributable to noncontrolling interests	(10)
Comprehensive income attributable to Bancorp	$ 380	$ 428