Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ 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					471,000
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]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income	[2]	(10)					144			(154)	[3]
Net Income (Loss) Attributable to Parent		643	[4]				643
Other Comprehensive Income (Loss), Net of Tax		(548)								(548)
Noncontrolling Interest, Period Increase (Decrease)		(2)						(2)
Dividends, Common Stock, Cash		(187)					(187)
Dividends, Preferred Stock, Cash	[5]	(31)					(31)
Stock Redeemed or Called During Period, Value		(450)		(450)
Treasury Stock, Shares, Acquired					(5,000)
Treasury Stock, Value, Acquired, Cost Method		(330)						(330)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period					1,000
Stock Issued During Period, Value, Stock Options Exercised		32						32
Stock Issued During Period, Shares, Other					2,000
Stock Issued During Period, Value, Other		2			$ 2
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures					1,000
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures		(4)				(40)	(2)	38
Total shareholders' equity at Mar. 31, 2018		$ 24,269		2,025	$ 552	8,960	18,107	(3,853)		(1,522)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Shares, Outstanding					470,000
Common Stock, Shares, Outstanding		446,888	[6]		447,000
Total shareholders' equity at Dec. 31, 2018		$ 24,280		2,025	$ 553	9,022	19,522	(5,422)		(1,420)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income	[7]	31					31
Net Income (Loss) Attributable to Parent		580					580
Other Comprehensive Income (Loss), Net of Tax		454								454
Noncontrolling Interest, Period Increase (Decrease)		(2)						(2)
Dividends, Common Stock, Cash		(222)					(222)
Dividends, Preferred Stock, Cash	[5]	(26)					(26)
Treasury Stock, Shares, Acquired					(4,000)
Treasury Stock, Value, Acquired, Cost Method		(250)						(250)
Stock Issued During Period, Value, Stock Options Exercised		2				(1)		3
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures					1,000
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures		(24)				(83)	(3)	62
Total shareholders' equity at Mar. 31, 2019		$ 24,823		$ 2,025	$ 553	$ 8,938	$ 19,882	$ (5,609)		$ (966)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Shares, Outstanding		443,713	[6]		444,000

[1] At March 31, 2019, includes ($5,710) million for treasury stock and $101 million for noncontrolling interest.At March 31, 2018, includes ($3,953) million for treasury stock, less than ($1) million for the compensation element of restricted stock, and $101 million for noncontrolling interest.

[2] Related to the Company’s adoption of ASU 2014-09, ASU 2016-01, ASU 2017-12, and ASU 2018-02 on January 1, 2018. See Note 1, “Significant Accounting Policies,” to the Company's 2018 Annual Report on Form 10-K for additional information.

[3] Related to the Company’s early adoption of ASU 2018-02 on January 1, 2018. See Note 1, “Significant Accounting Policies,” to the Company's 2018 Annual Report on Form 10-K for additional information.

[4] During the second quarter of 2018, certain of the Company's business banking clients were transferred from the Wholesale business segment to the Consumer business segment. For all periods prior to the second quarter of 2018, the corresponding financial results have been transferred to the Consumer business segment for comparability purposes.

[5] For the three months ended March 31, 2019, dividends were $1,000 per share for both Series A and B Preferred Stock, $1,406 per share for Series F Preferred Stock, $1,263 per share for Series G Preferred Stock, and $1,281 per share for Series H Preferred Stock.For the three months ended March 31, 2018, dividends were $1,000 per share for both Series A and B Preferred Stock, $1,469 per share for Series E Preferred Stock, $1,406 per share for Series F Preferred Stock, $1,038 per share for Series G Preferred Stock, and $1,281 per share for Series H Preferred Stock.

[6] Includes restricted shares of 7 thousand and 7 thousand at March 31, 2019 and December 31, 2018, respectively.

[7] Related to the Company’s adoption of ASU 2016-02 on January 1, 2019. See Note 1, “Significant Accounting Policies,” for additional information.