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					491,000
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]
Net Income (Loss) Attributable to Parent		995	[2],[3]				995
Other Comprehensive Income (Loss), Net of Tax		44								44
Dividends, Common Stock, Cash		(253)					(253)
Dividends, Preferred Stock, Cash	[4]	(39)					(39)
Stock Issued During Period, Value, New Issues		743		750		(7)
Treasury Stock, Shares, Acquired					(11,000)
Treasury Stock, Value, Acquired, Cost Method		(654)						(654)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period					1,000
Stock Issued During Period, Value, Stock Options Exercised		(12)				(13)		(25)
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures					1,000
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures		11				(17)	(2)	30
Total shareholders' equity at Jun. 30, 2017		$ 24,477		1,975	$ 550	8,973	16,701	(2,945)		(777)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Shares, Outstanding					482,000
Common Stock, Shares, Outstanding		470,931	[5]		471,000
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income	[6]	$ (10)					144			(154)	[7]
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]
Net Income (Loss) Attributable to Parent		1,365					1,365
Other Comprehensive Income (Loss), Net of Tax		(705)								(705)
Dividends, Common Stock, Cash		(374)					(374)
Dividends, Preferred Stock, Cash	[4]	(55)					(55)
Treasury Stock, Shares, Acquired					(10,000)
Treasury Stock, Value, Acquired, Cost Method		(660)						(660)
Stock Redeemed or Called During Period, Value		(450)		(450)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period					1,000
Stock Issued During Period, Value, Stock Options Exercised		(32)				(1)		(33)
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		17				(19)	(4)	40
Total shareholders' equity at Jun. 30, 2018		$ 24,316		$ 2,025	$ 552	$ 8,980	$ 18,616	$ (4,178)		$ (1,679)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Shares, Outstanding		465,199	[5]		465,000

[1] At June 30, 2018, includes ($4,281) million for treasury stock and $103 million for noncontrolling interest.At June 30, 2017, includes ($3,048) million for treasury stock and $103 million for noncontrolling interest.

[2] During the fourth quarter of 2017, the Company sold PAC, the results of which were previously reported within the Wholesale business segment. For all periods prior to January 1, 2018, PAC's financial results, including the gain on sale, have been transferred to Corporate Other for enhanced comparability of the Wholesale business segment excluding PAC.

[3] 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.

[4] For the six months ended June 30, 2018, dividends were $2,022 per share for both Series A and B Preferred Stock, $1,469 per share for Series E Preferred Stock, $2,813 per share for Series F Preferred Stock, $2,525 per share for Series G Preferred Stock, and $3,004 per share for Series H Preferred Stock.For the six months ended June 30, 2017, dividends were $2,022 per share for both Series A and B Preferred Stock, $2,938 per share for Series E Preferred Stock, $2,813 per share for Series F Preferred Stock, and $828 per share for Series G Preferred Stock.

[5] Includes restricted shares of 7 thousand and 9 thousand at June 30, 2018 and December 31, 2017, respectively.

[6] 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," for additional information.

[7] Related to the Company's adoption of ASU 2018-02 on January 1, 2018. See Note 1, "Significant Accounting Policies," for additional information.