Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash Flows from Operating Activities:
Net income including noncontrolling interests	$ 331	$ 307
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Provision for credit losses	125	18
Depreciation, amortization and accretion, net	160	202
Stock-based compensation—restricted stock units	29	16
Deferred income taxes	195	126
Net gains on sales of securities	(32)	(8)
Net decrease (increase) in trading account assets	(475)	25
Net decrease (increase) in other assets	89	(173)
Net increase (decrease) in trading account liabilities	(120)	(160)
Net increase (decrease) in other liabilities	(264)	(172)
Loans originated for sale	(793)	(678)
Net proceeds from sale of loans originated for sale	829	651
Pension and other benefits adjustment	(145)	(144)
Other, net	12	5
Total adjustments	(390)	(292)
Net cash provided by (used in) operating activities	(59)	15
Cash Flows from Investing Activities:
Proceeds from sales of securities available for sale	(2,719)	(895)
Proceeds from paydowns and maturities of securities available for sale	735	978
Purchases of securities available for sale	(1,706)	(2,228)
Proceeds from paydowns and maturities of securities held to maturity	1,037	831
Purchases of securities held to maturity	(1,204)	(2,344)
Proceeds from sales of loans	112	198
Net decrease (increase) in loans	(2,072)	172
Purchases of other investments	(186)	(249)
Other, net	(116)	(44)
Net cash provided by (used in) investing activities	(681)	(1,791)
Cash Flows from Financing Activities:
Net increase (decrease) in deposits	(1,668)	(4,302)
Net increase (decrease) in commercial paper and other short-term borrowings	3,665	2,558
Proceeds from issuance of long-term debt	0	2,697
Repayment of long-term debt	(1,900)	(816)
Other, net	(28)	(56)
Change in noncontrolling interests	7	(13)
Net cash provided by (used in) financing activities	76	68
Net change in cash and cash equivalents	(664)	(1,708)
Cash and cash equivalents at beginning of period	4,529	5,751
Cash and cash equivalents at end of period	3,865	4,043
Cash Paid During the Period For:
Interest Paid	216	183
Income taxes, net	117	61
Supplemental Schedule of Noncash Investing and Financing Activities:
Net transfer of loans held for investment to loans held for sale	179	202
Transfer of loans held for investment to OREO	$ 3	$ 10