CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME Unaudited (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net income (loss)	$ 364	$ 381	$ 1,179	$ 984
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Unrealized holding gains (losses) on available-for-sale securities arising during period	22	155	19	243
Reclassification adjustment for net gains included in net income	(4)	(34)	(10)	(45)
Unrealized holding gains on cash flow hedge derivatives arising during period	8	17	23	39
Reclassification adjustment for net (gains) losses on cash flow hedge derivatives included in net income	(14)	6	(41)	(14)
Net actuarial loss	2	2	7	5
Other comprehensive income (loss)	14	146	(2)	228
Comprehensive income	378	527	1,177	1,212
Comprehensive income attributable to noncontrolling interests	1		1	1
Comprehensive income attributable to Bancorp	$ 377	$ 527	$ 1,176	$ 1,211