Consolidated Statement of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating Activities:
Net income	$ 363	$ 464
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Deferred income tax expense	7	57
Amortization of other intangible assets	54	53
Other non-cash adjustments for depreciation, amortization and accretion, net	99	107
Gains related to investment securities, net	(6)	(2)
Change in trading account assets, net	(46)	(17)
Change in accrued interest and fees receivable, net	(74)	(133)
Change in collateral deposits, net	(419)	(321)
Change in unrealized losses on foreign exchange derivatives, net	267	72
Change in other assets, net	34	639
Change in accrued expenses and other liabilities, net	1,542	(734)
Other, net	126	197
Net cash provided by operating activities	1,947	382
Investing Activities:
Net (increase) decrease in interest-bearing deposits with banks	(11,539)	11,539
Net decrease (increase) in securities purchased under resale agreements	143	(3,687)
Proceeds from sales of available-for-sale securities	1,816	2,750
Proceeds from maturities of available-for-sale securities	8,733	9,723
Purchases of available-for-sale securities	(10,377)	(8,240)
Proceeds from maturities of available-for-sale securities	667	437
Proceeds from sales of held-to-maturity securities	2	0
Purchases of held-to-maturity securities	(1,157)	(2,570)
Net increase in loans	(2,628)	(1,702)
Purchases of equity investments and other long-term assets	(82)	(51)
Purchases of premises and equipment	(110)	(119)
Other, net	18	36
Net cash (used in) provided by investing activities	(14,514)	8,116
Financing Activities:
Net decrease in time deposits	(1,084)	(10,218)
Net increase in all other deposits	13,464	812
Net increase in short-term borrowings	1,030	3,555
Payments for long-term debt and obligations under capital leases	(257)	(7)
Proceeds from issuance of preferred stock	742	0
Proceeds from exercises of common stock options	9	60
Purchases of common stock	(420)	(360)
Repurchases of common stock for employee tax withholding	(140)	(112)
Payments for cash dividends	(120)	(110)
Net cash provided by (used in) financing activities	13,224	(6,380)
Net increase	657	2,118
Cash and due from banks at beginning of period	3,220	2,590
Cash and due from banks at end of period	$ 3,877	$ 4,708