Consolidated Statements of Cash Flows - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Cash Flows from Operating Activities:
Net income including noncontrolling interests	[1]	$ 224	$ 50
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
(Reversal of) provision for credit losses	[1]	(30)	162
Depreciation, amortization and accretion, net		80	87
Stock-based compensation—restricted stock units		14	15
Deferred income taxes		31	(16)
Net gains on sales of securities		(2)	(13)
Net decrease (increase) in securities borrowed or purchased under resale agreements		(245)	2,962
Net decrease (increase) in securities loaned or sold under repurchase agreements		463	(1,930)
Net decrease (increase) in trading account assets		16	(1,895)
Net decrease (increase) in other assets		(568)	239
Net increase (decrease) in trading account liabilities		328	663
Net increase (decrease) in other liabilities		(27)	7
Loans originated for sale		(146)	(519)
Net proceeds from sale of loans originated for sale		208	514
Pension and other benefits adjustment		(127)	(149)
Other, net		(12)	8
Total adjustments		(17)	135
Net cash provided by (used in) operating activities		207	185
Cash Flows from Investing Activities:
Proceeds from sales of securities available for sale		608	1,658
Proceeds from paydowns and maturities of securities available for sale		567	378
Purchases of securities available for sale		(2,018)	(610)
Proceeds from paydowns and maturities of securities held to maturity		408	360
Purchases of securities held to maturity		(499)	(866)
Proceeds from sales of loans		347	49
Net decrease (increase) in loans		(1,194)	(1,588)
Purchases of other investments		(14)	(67)
Other, net		27	(77)
Net cash provided by (used in) investing activities		(1,768)	(763)
Cash Flows from Financing Activities:
Net increase (decrease) in deposits		(425)	5,149
Net increase (decrease) in commercial paper and other short-term borrowings		1,145	(246)
Proceeds from issuance of senior debt due to BTMU		3,521	0
Repayment of long-term debt		(3,602)	(565)
Other, net		(2)	(15)
Change in noncontrolling interests		(2)	8
Net cash provided by (used in) financing activities		635	4,331
Net change in cash and cash equivalents		(926)	3,753
Cash and cash equivalents at beginning of period		5,753	4,807
Cash and cash equivalents at end of period		4,827	8,560
Cash Paid During the Period For:
Interest		187	138
Income taxes, net		22	50
Supplemental Schedule of Noncash Investing and Financing Activities:
Net transfer of loans held for investment to (from) loans held for sale		$ 230	$ (81)

[1] The transferred IHC entities are not measured using a "market view" perspective.