Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions		Total		Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]		Retained Earnings [Member]	Treasury Stock and Other	[1]	AOCI Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Shares, Outstanding					525,000,000
Stock Issued During Period, Value, Employee Benefit Plan		$ 3				$ 0			$ 3
Total shareholders' equity at Dec. 31, 2014		23,005		$ 1,225	$ 550	9,089		$ 13,295	(1,032)		$ (122)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent		1,933	[2]					1,933
Other Comprehensive Income (Loss), Net of Tax		(338)									(338)
Dividends, Common Stock, Cash		(475)						(475)
Dividends, Preferred Stock, Cash	[3]	(64)						(64)
Treasury Stock, Shares, Acquired					(17,000,000)
Treasury Stock, Value, Acquired, Cost Method		(679)							(679)
Payments for Repurchase of Warrants		0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period					1,000,000
Stock Issued During Period, Value, Stock Options Exercised		12				18			30
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures					0
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures		24				23		(3)	4
Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition		16							16
Total shareholders' equity at Dec. 31, 2015		23,437		1,225	$ 550	9,094		14,686	(1,658)		(460)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Shares, Outstanding					509,000,000
Cumulative Effect of Credit Risk Adjustment	[4]	0						5			(5)	[5]
Net Income (Loss) Attributable to Parent		1,878	[6]					1,878
Other Comprehensive Income (Loss), Net of Tax		(356)									(356)
Noncontrolling Interest, Period Increase (Decrease)		(5)							(5)
Dividends, Common Stock, Cash		(498)						(498)
Dividends, Preferred Stock, Cash	[3]	(66)						(66)
Treasury Stock, Shares, Acquired					(20,000,000)
Treasury Stock, Value, Acquired, Cost Method		(806)							(806)
Payments for Repurchase of Warrants		(24)				(24)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period					1,000,000
Stock Issued During Period, Value, Stock Options Exercised		25	[7]			40	[7]		65
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures					1,000,000
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures		31	[7]			(20)	[7]	(5)	56
Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition		2							2
Total shareholders' equity at Dec. 31, 2016		$ 23,618		1,225	$ 550	9,010		16,000	(2,346)		(821)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Shares, Outstanding		491,188,000	[8]		491,000,000
Net Income (Loss) Attributable to Parent		$ 2,273						2,273
Other Comprehensive Income (Loss), Net of Tax		1									1
Dividends, Common Stock, Cash		(634)						(634)
Dividends, Preferred Stock, Cash	[3]	(94)						(94)
Stock Issued During Period, Value, New Issues		1,239		1,250		(11)
Treasury Stock, Shares, Acquired					(22,000,000)
Treasury Stock, Value, Acquired, Cost Method		(1,314)							(1,314)
Payments for Repurchase of Warrants		$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period		830,383			1,000,000
Stock Issued During Period, Value, Stock Options Exercised		$ 21				(15)			36
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures					1,000,000
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures		44				16		(5)	33
Total shareholders' equity at Dec. 31, 2017		$ 25,154		$ 2,475	$ 550	$ 9,000		$ 17,540	$ (3,591)		$ (820)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Shares, Outstanding		470,931,000	[8]		471,000,000

[1] At December 31, 2017, includes ($3,694) million for treasury stock and $103 million for noncontrolling interest.At December 31, 2016, includes ($2,448) million for treasury stock, ($1) million for the compensation element of restricted stock, and $103 million for noncontrolling interest.At December 31, 2015, includes ($1,764) million for treasury stock,($2) million for the compensation element of restricted stock, and $108 million for noncontrolling interest.

[2] Beginning in the second quarter of 2017, the Company realigned its business segment structure from three segments to two segments. Specifically, the Company retained the previous composition of the Wholesale Banking segment and changed the basis of presentation of the Consumer Banking and Private Wealth Management segment and Mortgage Banking segment such that those segments were combined into a single Consumer segment. Accordingly, business segment information presented for the year ended December 31, 2015 has been revised to conform to the new business segment structure and updated internal funds transfer pricing methodology for consistent presentation.

[3] For the year ended December 31, 2017, dividends were $4,056 per share for both Perpetual Preferred Stock Series A and B, $5,875 per share for Perpetual Preferred Stock Series E, $5,625 per share for Perpetual Preferred Stock Series F, $3,128 per share for Perpetual Preferred Stock Series G, and $669 per share for Perpetual Preferred Stock Series H.For the year ended December 31, 2016, dividends were $4,067 per share for both Perpetual Preferred Stock Series A and B, $5,875 per share for Perpetual Preferred Stock Series E, and $5,625 per share for Perpetual Preferred Stock Series F.For the year ended December 31, 2015, dividends were $4,056 per share for both Perpetual Preferred Stock Series A and B, and $5,875 per share for Perpetual Preferred Stock Series E, and $6,219 per share for Perpetual Preferred Stock Series F.

[4] Related to the Company's early adoption of the ASU 2016-01 provision related to changes in instrument-specific credit risk, beginning January 1, 2016. See Note 1, "Significant Accounting Policies," and Note 21, "Accumulated Other Comprehensive Loss," for additional information.

[5] Related to the Company's early adoption of the ASU 2016-01 provision related to changes in instrument-specific credit risk. See Note 1, "Significant Accounting Policies," for additional information.

[6] Beginning in the second quarter of 2017, the Company realigned its business segment structure from three segments to two segments. Specifically, the Company retained the previous composition of the Wholesale Banking segment and changed the basis of presentation of the Consumer Banking and Private Wealth Management segment and Mortgage Banking segment such that those segments were combined into a single Consumer segment. Accordingly, business segment information presented for the year ended December 31, 2016 has been revised to conform to the new business segment structure and updated internal funds transfer pricing methodology for consistent presentation.

[7] Includes a ($4) million net reclassification of excess tax benefits from Additional paid-in capital to Provision for income taxes, related to the Company's adoption of ASU 2016-09.

[8] Includes restricted shares of 9 thousand and 11 thousand at December 31, 2017 and December 31, 2016, respectively.