Consolidated Statements of Income - USD ($) shares in Thousands, $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Interest Income
Interest and Fee Income, Loans and Leases Held-in-portfolio		$ 6,058		$ 5,385		$ 4,939
Interest and fees on loans held for sale		101		99		92
Interest and Dividend Income, Securities, Available-for-sale	[1],[2]	849		756		636
Trading account interest and other	[1]	197		147		111
Total interest income		7,205		6,387		5,778
Interest Expense
Interest Expense, Deposits		711		404		259
Interest Expense, Long-term Debt		375		288		260
Interest on other borrowings		132		62		38
Total interest expense		1,218		754		557
Net, interest income		5,987		5,633	[3],[4]	5,221	[5],[6]
Provision for Loan, Lease, and Other Losses		208	[7]	409	[3],[4],[8]	444	[5],[6],[9]
Interest Income (Expense), after Provision for Loan Loss		5,779		5,224		4,777
Noninterest Income
Service charges on deposit accounts		579		603		630
Other charges and fees	[10]	356		361		359
Card fees		324		344		327
Investment Banking Revenue	[10]	599		623		515
Trading Gain (Loss)		161		189		211
Mortgage Related Income	[11]	342		422		555
Trust and investment management income		304		309		304
Retail investment services		292		278		281
Commercial Real Estate Related Income		134		123		69
Debt and Equity Securities, Gain (Loss)		1		(108)		4
Gain (Loss) on Disposition of Business		0		107		0
Noninterest Income, Other Operating Income		134		103		128
Noninterest Income		3,226		3,354	[3],[4]	3,383	[5],[6]
Noninterest Expense
Employee compensation		2,878		2,854		2,698
Other Labor-related Expenses		430		403		373
Outside processing and software		909		826		834
Net occupancy expense		372		377		349
Marketing and Advertising Expense		175		232		172
Equipment Expense		166		164		170
Federal Deposit Insurance Corporation Premium Expense		126		187		173
Operating losses		79		40		108
Amortization		73		75		49
Professional Fees		62		71		93
Other Staff Expense		52		121		67
Other Noninterest Expense		351		414		382
Noninterest Expense		5,673		5,764	[3],[4]	5,468	[5],[6]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest		3,332		2,814		2,692
Income Tax Expense (Benefit)		548		532		805
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		2,784		2,282	[3],[4]	1,887	[5],[6]
Net Income (Loss) Attributable to Noncontrolling Interest		9		9	[3],[4]	9	[5],[6]
Net Income (Loss) Attributable to Parent		2,775		2,273	[3],[4]	1,878	[5],[6]
Preferred Stock Dividends and Other Adjustments		107		94		67
Net Income (Loss) Available to Common Stockholders, Basic		$ 2,668		$ 2,179		$ 1,811
Earnings Per Share, Diluted		$ 5.74		$ 4.47		$ 3.60
Earnings Per Share, Basic		5.79		4.53		3.63
Common Stock, Dividends, Per Share, Declared		$ 1.80		$ 1.32		$ 1.00
Weighted Average Number of Shares Outstanding, Diluted		464,961		486,954		503,466
Weighted Average Number of Shares Outstanding, Basic		460,922		481,339		498,638

[1] Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets and began presenting income associated with certain of these equity securities in Trading account interest and other. For periods prior to January 1, 2018, this income was previously presented in Interest on securities available for sale and has been reclassified to Trading account interest and other for comparability.

[2] Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets and began presenting income associated with certain of these equity securities in Trading account interest and other on the Consolidated Statements of Income. For periods prior to January 1, 2018, this income was previously presented in Interest on securities available for sale and has been reclassified to Trading account interest and other for comparability.

[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] 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.

[5] 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.

[6] 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.

[7] Provision for credit losses represents net charge-offs by segment combined with an allocation to the segments for the provision attributable to quarterly changes in the ALLL and unfunded commitment reserve balances.

[8] Provision for credit losses represents net charge-offs by segment combined with an allocation to the segments for the provision attributable to quarterly changes in the ALLL and unfunded commitment reserve balances.

[9] Provision for credit losses represents net charge-offs by segment combined with an allocation to the segments for the provision attributable to quarterly changes in the ALLL and unfunded commitment reserve balances.

[10] Beginning July 1, 2018, the Company began presenting bridge commitment fee income related to capital market transactions in Investment banking income on the Consolidated Statements of Income. For periods prior to July 1, 2018, this income was previously presented in Other charges and fees and has been reclassified to Investment banking income for comparability.

[11] Beginning with this Form 10-K, the Company began presenting Mortgage production related income and Mortgage servicing related income as a single line item on the Consolidated Statements of Income titled Mortgage related income. Prior periods have been conformed to this updated presentation for comparability.