Consolidated Statement of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Operating Activities:
Net income	$ 1,395	$ 1,122
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Deferred income tax (benefit)	(93)	(56)
Amortization of other intangible assets	98	106
Other non-cash adjustments for depreciation, amortization and accretion, net	489	415
(Gains) losses related to investment securities, net	(7)	40
Change in trading account assets, net	(67)	128
Change in accrued interest and fees receivable, net	13	(161)
Change in collateral deposits, net	3,159	(1,047)
Change in unrealized losses on foreign exchange derivatives, net	(2,956)	3,578
Change in other assets, net	(276)	(1,787)
Change in accrued expenses and other liabilities, net	1,379	1,354
Other, net	268	307
Net cash provided by operating activities	3,402	3,999
Investing Activities:
Net (increase) decrease in interest-bearing deposits with banks	(9,139)	7,318
Net (increase) in securities purchased under resale agreements	(342)	(1,216)
Proceeds from sales of available-for-sale securities	15,687	4,354
Proceeds from maturities of available-for-sale securities	8,009	15,178
Purchases of available-for-sale securities	(15,459)	(14,880)
Proceeds from maturities of held-to-maturity securities	2,863	1,621
Purchases of held-to-maturity securities	(2,102)	(2,636)
Net (increase) in loans and leases	(819)	(4,587)
Purchases of equity investments and other long-term assets	(173)	(19)
Purchases of premises and equipment, net	(285)	(325)
Proceeds from sale of joint venture investment	0	172
Other, net	28	36
Net cash (used in) provided by investing activities	(1,732)	5,016
Financing Activities:
Net increase (decrease) in time deposits	2,727	(17,067)
Net (decrease) increase in all other deposits	(960)	11,320
Net increase (decrease) in other short-term borrowings	205	(664)
Proceeds from issuance of long-term debt, net of issuance costs	0	747
Payments for long-term debt and obligations under capital leases	(1,024)	(471)
Purchases of common stock	(350)	(592)
Repurchases of common stock for employee tax withholding	(90)	(76)
Payments for cash dividends	(399)	(379)
Other, net	0	9
Net cash provided by (used in) financing activities	109	(7,173)
Net increase	1,779	1,842
Cash and due from banks at beginning of period	2,107	1,314
Cash and due from banks at end of period	$ 3,886	$ 3,156