CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME Unaudited (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Other Comprehensive Income
Net income (loss)	$ 591	$ 385	$ 1,003	$ 816
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Unrealized holding gains (losses) on available-for-sale securities arising during period	(211)	(10)	(247)	(3)
Reclassification adjustment for net gains included in net income	33	(2)	38	(6)
Unrealized holding (losses) gains on cash flow hedge derivatives arising during period	(2)	10	(1)	16
Reclassification adjustment for net (gains) losses on cash flow hedge derivatives included in net income	(6)	(14)	(20)	(27)
Net actuarial loss	2	2	4	4
Other comprehensive income (loss)	(184)	(14)	(226)	(16)
Comprehensive income	407	371	777	800
Comprehensive income attributable to noncontrolling interests			(10)	1
Comprehensive income attributable to Bancorp	$ 407	$ 371	$ 787	$ 799