Consolidated Statement of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Operating Activities
Net income	$ 3,297	$ 2,938
Adjustments to reconcile net income to net cash provided (used) by operating activities
Provision for credit losses	316	366
Depreciation and amortization	859	917
Deferred income taxes	147	(171)
Changes in fair value of mortgage servicing rights	231	559
Gain on sales of Visa Class B common shares		(126)
Undistributed earnings of BlackRock	(315)	(256)
Net change in
Trading securities and other short-term investments	252	(1,029)
Loans held for sale	37	(490)
Other assets	130	(2,179)
Accrued expenses and other liabilities	5	2,197
Other	(133)	(431)
Net cash provided (used) by operating activities	4,826	2,295
Sales
Securities available for sale	4,192	2,517
Loans	1,493	1,538
Repayments/maturities
Securities available for sale	8,195	7,683
Securities held to maturity	2,196	2,013
Purchases
Securities available for sale	(8,676)	(15,179)
Securities held to maturity	(4,098)	(3,741)
Loans	(690)	(963)
Net change in
Federal funds sold and resale agreements	(397)	651
Interest-earning deposits with banks	998	3,487
Loans	(10,606)	(5,451)
Net cash paid for acquisition	(1,323)
Other	(899)	(159)
Net cash provided (used) by investing activities	(9,615)	(7,604)
Net change in
Noninterest-bearing deposits	(165)	3,162
Interest-bearing deposits	3,834	8,169
Federal funds purchased and repurchase agreements	(33)	(542)
Federal Home Loan Bank borrowings	3,000
Other borrowed funds	829	(15)
Sales/issuances
Federal Home Loan Bank borrowings	6,000
Bank notes and senior debt	5,309	3,855
Other borrowed funds	277	143
Common and treasury stock	94	63
Repayments/maturities
Federal Home Loan Bank borrowings	(6,011)	(3,058)
Bank notes and senior debt	(1,800)	(3,000)
Subordinated debt	(2,408)
Other borrowed funds	(268)	(484)
Redemption of noncontrolling interests	(1,000)
Acquisition of treasury stock	(1,927)	(1,559)
Preferred stock cash dividends paid	(181)	(168)
Common stock cash dividends paid	(904)	(791)
Net cash provided (used) by financing activities	4,646	5,775
Net Increase (Decrease) In Cash And Due From Banks	(143)	466
Cash and due from banks at beginning of period	4,879	4,065
Cash and due from banks at end of period	4,736	4,531
Supplemental Disclosures
Interest paid	1,201	980
Income taxes paid	53	461
Income taxes refunded	11	97
Non-cash Investing and Financing Items
Transfer from loans to loans held for sale, net	295	497
Transfer from loans to foreclosed assets	164	$ 225
Transfer from trading securities to investment securities	$ 192