Suntrust Banks 10-K 22 Feb 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ / shares in Units, $ in Billions	12 Months Ended
	Dec. 31, 2018	Feb. 15, 2019	Jun. 29, 2018	Dec. 31, 2017
Entity Registrant Name	SUNTRUST BANKS INC
Entity Central Index Key	750,556
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding		443,255,088
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Shell Company	false
Common Stock, Par or Stated Value Per Share	$ 1			$ 1
Entity Public Float			$ 30.2

Consolidated Statements of Inco

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
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.

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net Income (Loss) Attributable to Parent	$ 2,775	$ 2,273	[1],[2]	$ 1,878	[3],[4]
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax	(386)	61	[5]	(197)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	(68)	(87)	[5]	(244)
Other Comprehensive Income (Loss), Brokered Time Deposits, Net of Tax	2	0	[5]	(1)
Other Comprehensive Income (Loss), Long Term Debt, Adjustment, Net of Tax	4	3	[5]	(2)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	2	24	[5]	88
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(446)	1	[5]	(356)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 2,329	$ 2,274	[5]	$ 1,522
[1]	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.
[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]	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]	Net of tax amounts include the stranded tax effects resulting from the 2017 Tax Act . See Note 1

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income Consolidated Statement of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Other Comprehensive Income (Loss), Securities, Available-for-sale, Tax	$ (117)	$ 29	$ (117)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax	(21)	0	(145)
Other Comprehensive Income (Loss), Brokered Time Deposits, Tax	0	0	0
Other Comprehensive Income (Loss), Long Term Debt, Adjustment, Tax	1	3	(1)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax	$ 1	$ 138	$ 52

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) shares in Thousands, $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Assets
Cash and Due from Banks		$ 5,791	$ 5,349
Federal Funds Sold and Securities Purchased under Agreements to Resell		1,679	1,538
Interest-bearing Deposits in Banks and Other Financial Institutions		25	25
Cash and cash equivalents		7,495	6,912
Debt Securities, Trading, and Equity Securities, FV-NI	[1]	5,506	5,093
Available-for-sale Securities	[2],[3]	31,442	30,947	[4]
Loans Held for Sale	[5]	1,468	2,290
Loans held for investment	[6]	151,839	143,181
Loans and Leases Receivable, Allowance		(1,615)	(1,735)
Net loans		150,224	141,446
Property, Plant and Equipment, Net	[7]	2,024	2,053
Goodwill		6,331	6,331
Intangible Assets, Net (Excluding Goodwill)	[8]	2,062	1,791
Other Assets	[2],[7]	8,991	9,099
Total assets		215,543	205,962
Liabilities and Shareholders' Equity
Noninterest-bearing consumer and commercial deposits		40,770	42,784
Interest-bearing Deposit Liabilities		121,819	117,996
Total deposits		162,589	160,780
Federal Funds Purchased		2,141	2,561
Securities Sold under Agreements to Repurchase		1,774	1,503
Other Short-term Borrowings		4,857	717
Long-term Debt	[9],[10]	15,072	9,785
Trading liabilities		1,604	1,283
Other Liabilities		3,226	4,179
Total liabilities		191,263	180,808
Preferred Stock, Value, Outstanding		2,025	2,475
Common Stock, Value, Outstanding		553	550
Additional Paid in Capital		9,022	9,000
Retained earnings		19,522	17,540
Treasury Stock, Value	[11]	(5,422)	(3,591)
Accumulated Other Comprehensive Income (Loss), Net of Tax		(1,420)	(820)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		24,280	25,154
Liabilities and Equity		$ 215,543	$ 205,962
Common Stock, Shares, Outstanding	[12]	446,888	470,931
Common shares authorized		750,000	750,000
Preferred Stock, Shares Outstanding		20	25
Preferred Stock, Shares Authorized		50,000	50,000
Treasury shares of common stock		105,896	79,133
Treasury Stock and Other
Liabilities and Shareholders' Equity
Treasury Stock, Value		$ (5,525)	$ (3,694)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	[13]	(5,422)	(3,591)
Stockholders' Equity Attributable to Noncontrolling Interest		103	103
Variable Interest Entity, Primary Beneficiary [Member]
Assets
Loans held for investment		153	179
Liabilities and Shareholders' Equity
Long-term Debt		$ 161	$ 189
Restricted Stock [Member]
Liabilities and Shareholders' Equity
Common Stock, Shares, Outstanding		7	9
Trading Assets [Member]
Liabilities and Shareholders' Equity
Pledged Assets Separately Reported, Securities Pledged as Collateral, at Fair Value		$ 1,442	$ 1,086
Available-for-sale Securities [Member]
Liabilities and Shareholders' Equity
Pledged Assets Separately Reported, Securities Pledged as Collateral, at Fair Value		$ 222	$ 223
[1]	Includes trading securities pledged as collateral where counterparties have the right to sell or repledge the collateral of $1,442 million and $1,086 million at December?31, 2018 and December?31, 2017, respectively.
[2]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities available for sale to Other assets. Reclassifications have been made to previously reported amounts for comparability.
[3]	Includes securities AFS pledged as collateral where counterparties have the right to sell or repledge the collateral of $222 million and $223 million at December?31, 2018 and December?31, 2017, respectively.
[4]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability . See Note 11 , "Other Assets," for additional information.
[5]	Includes $1.2 billion and $1.6 billion of LHFS measured at fair value at December 31, 2018 and 2017
[6]	Includes loans of consolidated VIEs of $153 million and $179 million at December?31, 2018 and December?31, 2017, respectively.
[7]	Beginning October 1, 2018, the Company reclassified software and related accumulated amortization previously presented in Other assets to Premises, property, and equipment, net. Reclassifications have been made to previously reported amounts for comparability.
[8]	Excludes other intangible assets that are indefinite-lived, carried at fair value, or fully amortized.
[9]	Includes $289 million and $530 million of long-term debt measured at fair value at December 31, 2018 and 2017
[10]	Includes debt of consolidated VIEs of $161 million and $189 million at December?31, 2018 and December?31, 2017, respectively.
[11]	Includes noncontrolling interest of $103 million and $103 million at December?31, 2018 and December?31, 2017, respectively.
[12]	Includes restricted shares of 7 thousand and 9 thousand at December?31, 2018 and December?31, 2017, respectively.
[13]	At December 31, 2018 , includes ($5,525) million for treasury stock and $103 million for noncontrolling interest. 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

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Loans Held-for-sale, Fair Value Disclosure		$ 1,200	$ 1,600
Loans Receivable, Fair Value Disclosure		163	196
Long-term Debt, Fair Value		$ 289	$ 530
Common stock, par value		$ 1	$ 1
Loans and Leases Receivable, Gross	[1]	$ 151,839	$ 143,181
Long-term Debt	[2],[3]	$ 15,072	$ 9,785
Common Stock, Shares, Outstanding	[4]	446,888	470,931
Variable Interest Entity, Primary Beneficiary [Member]
Loans and Leases Receivable, Gross		$ 153	$ 179
Long-term Debt		161	189
Treasury Stock and Other
Stockholders' Equity Attributable to Noncontrolling Interest		103	103
Consumer Portfolio Segment [Member]
Loans Receivable, Fair Value Disclosure		163	196
Loans and Leases Receivable, Gross		70,899	67,704
Residential Portfolio Segment [Member]
Loans and Leases Receivable, Gross		$ 38,900	$ 38,600
Restricted Stock [Member]
Common Stock, Shares, Outstanding		7	9
Available-for-sale Securities [Member]
Pledged Assets Separately Reported, Securities Pledged as Collateral, at Fair Value		$ 222	$ 223
Fair Value, Measurements, Recurring [Member]
Loans Held-for-sale, Fair Value Disclosure		1,178	1,577
Loans Receivable, Fair Value Disclosure		163	196
Servicing Asset at Fair Value, Amount		1,983	1,710
Other Assets, Fair Value Disclosure	[5]	95	56	[6]
Long-term Debt, Fair Value		289	530
Brokered Time Deposits [Member] | Fair Value, Measurements, Recurring [Member]
Deposits, Fair Value Disclosure		403	236
Mortgage Servicing Rights, Fair Value [Member]
Servicing Asset at Fair Value, Amount		$ 1,983	$ 1,710
[1]	Includes loans of consolidated VIEs of $153 million and $179 million at December?31, 2018 and December?31, 2017, respectively.
[2]	Includes $289 million and $530 million of long-term debt measured at fair value at December 31, 2018 and 2017
[3]	Includes debt of consolidated VIEs of $161 million and $189 million at December?31, 2018 and December?31, 2017, respectively.
[4]	Includes restricted shares of 7 thousand and 9 thousand at December?31, 2018 and December?31, 2017, respectively.
[5]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability . See Note 11
[6]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability . See Note 11

Consolidated Statements of Shar

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					509,000,000
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]
Cumulative Effect of Credit Risk Adjustment	[2]	0						5			(5)	[3]
Net Income (Loss) Attributable to Parent		1,878	[4],[5]					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	[6]	(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					491,000,000
Net Income (Loss) Attributable to Parent		2,273	[8],[9]					2,273
Other Comprehensive Income (Loss), Net of Tax		1									1
Dividends, Common Stock, Cash		(634)						(634)
Dividends, Preferred Stock, Cash	[6]	(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					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	[10]		471,000,000
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income	[11]	$ (5)						149			(154)	[12]
Net Income (Loss) Attributable to Parent		2,775						2,775
Other Comprehensive Income (Loss), Net of Tax		(446)									(446)
Dividends, Common Stock, Cash		(826)						(826)
Dividends, Preferred Stock, Cash	[6]	(107)						(107)
Stock Redeemed or Called During Period, Value		(450)		(450)
Treasury Stock, Shares, Acquired					(29,000,000)
Treasury Stock, Value, Acquired, Cost Method		(1,910)							(1,910)
Payments for Repurchase of Warrants		$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period		774,704			1,000,000
Stock Issued During Period, Value, Stock Options Exercised		$ 36							36
Stock Issued During Period, Shares, Other					3,000,000
Stock Issued During Period, Value, Other		0			$ 3	(3)
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		58				25		(9)	42
Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition		1							1
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]
Common Stock, Shares, Outstanding		446,888,000	[10]		447,000,000
[1]	At December 31, 2018 , includes ($5,525) million for treasury stock and $103 million for noncontrolling interest. 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
[2]	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 23
[3]	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
[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]	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.
[6]	For the year ended December 31, 2018 , dividends were $4,056 per share for both Series A and B Preferred Stock, $1,469 per share for Series E Preferred Stock, $5,625 per share for Series F Preferred Stock, $5,050 per share for Series G Preferred Stock, and $5,566 per share for Series H Preferred Stock. For the year ended December 31, 2017 , dividends were $4,056 per share for both Series A and B Preferred Stock, $5,875 per share for Series E Preferred Stock, $5,625 per share for Series F Preferred Stock, $3,128 per share for Series G Preferred Stock, and $669 per share for Series H Preferred Stock. For the year ended December 31, 2016 , dividends were $4,067 per share for both Series A and B Preferred Stock, $5,875 per share for Series E Preferred Stock, and $5,625
[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
[8]	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.
[9]	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.
[10]	Includes restricted shares of 7 thousand and 9 thousand at December?31, 2018 and December?31, 2017, respectively.
[11]	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
[12]	Related to the Company's early adoption of ASU 2018-02 beginning January 1, 2018. See Note 1

Consolidated Statements of Sh_2

Consolidated Statements of Shareholders' Equity (Parenthetical) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017	Dec. 31, 2016
Treasury Stock, Value	[1]	$ (5,422)		$ (3,591)
Common stock dividends, per share		$ 1.80		$ 1.32	$ 1
Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net					$ (4)
Treasury Stock and Other
Treasury Stock, Value		$ (5,525)		$ (3,694)	(2,448)
Deferred Compensation Equity		0		0	(1)
Stockholders' Equity Attributable to Noncontrolling Interest		$ 103		$ 103	$ 103
Series A Preferred Stock [Member]
Preferred Stock, Dividends, Per Share, Cash Paid		$ 4,056		$ 4,056	$ 4,067
Series B Preferred Stock [Member]
Preferred Stock, Dividends, Per Share, Cash Paid		4,056		4,056	4,067
Series E Preferred Stock [Member]
Preferred Stock, Dividends, Per Share, Cash Paid		1,469	[2]	5,875	5,875
Series F Preferred Stock [Member]
Preferred Stock, Dividends, Per Share, Cash Paid		5,625		5,625	5,625
Series G Preferred Stock [Member]
Preferred Stock, Dividends, Per Share, Cash Paid		5,050		3,128	0
Series H Preferred Stock [Member]
Preferred Stock, Dividends, Per Share, Cash Paid		$ 5,566		$ 669	$ 0
[1]	Includes noncontrolling interest of $103 million and $103 million at December?31, 2018 and December?31, 2017, respectively.
[2]	All 4,500

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Cash Flows from Operating Activities:
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 2,784	$ 2,282	[1],[2]	$ 1,887	[3],[4]
Adjustments to reconcile net income/(loss) to net cash provided by operating activities:
Depreciation, Amortization and Accretion, Net	716	727		725
Payments to Acquire Mortgage Servicing Rights (MSR)	(352)	(411)		(312)
Provisions For Credit Losses And Foreclosed Properties	218	418		449
Deferred Income Tax Expense (Benefit)	(87)	344		111
Stock Option Compensation And Amortization Of Restricted Stock Compensation	140	160		126
Debt and Equity Securities, Gain (Loss)	(1)	108		(4)
Gain (Loss) on Sale of Loans and Leases	(97)	(269)		(428)
Gain (Loss) on Disposition of Business	0	(107)		0
Net decrease/(increase) in loans held for sale	886	2,099		(1,819)
Net decrease/(increase) in Debt Securities, Trading, and Equity Securities, FV-NI	(501)	834		(342)
Net decrease/(increase) in other assets	(340)	348	[5]	(627)	[5]
Net increase/(decrease) in Other Operating Liabilities	(797)	(911)		(284)
Net Cash Provided by (Used in) Operating Activities, Continuing Operations	2,569	5,622		(518)
Cash Flows from Investing Activities:
Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale	3,690	4,186		5,108
Proceeds from Sale of Available-for-sale Securities	2,096	2,854		197
Payments to Acquire Available-for-sale Securities	(6,389)	(8,299)		(8,610)
Proceeds from (payments for) Originations and Purchases of Loans Held-for-investment	(9,406)	(2,425)		(9,032)
Proceeds from sales of loans	281	720		1,612
Payments for (Proceeds from) Mortgage Servicing Rights	(78)	(7)		(171)
Payment to Acquire Life Insurance Policy, Investing Activities	(202)	(127)	[5]	(202)	[5]
Proceeds from Life Insurance Policy	14	3	[5]	17	[5]
Proceeds from Collection of Retained Interest in Securitized Receivables	2	11	[5]	12	[5]
Capital expenditures	(345)	(410)		(283)
Payments related to acquisitions, including contingent consideration, net of cash acquired	0	0	[5]	(188)	[5]
Proceeds from Divestiture of Businesses	0	261		0
Proceeds from Sale of Other Real Estate	186	235		233
Net Cash Provided by (Used in) Investing Activities, Continuing Operations	(10,151)	(2,998)		(11,307)
Cash Flows from Financing Activities:
Net (decrease)/increase in total deposits	1,809	382		10,568
Net increase/(decrease) in funds purchased, securities sold under agreements to repurchase, and other short-term borrowings	3,991	17		37
Proceeds from Issuance of Long-term Debt	6,944	2,844		6,705
Repayment of long-term debt	(1,274)	(4,562)		(3,231)
Payment for Contingent Consideration Liability, Financing Activities	0	0	[5]	(13)	[5]
Proceeds from Issuance of Preferred Stock and Preference Stock	0	1,239		0
Payments for Repurchase of Preferred Stock and Preference Stock	(450)	0		0
Payments for Repurchase of Common Stock	(1,910)	(1,314)		(806)
Payments for Repurchase of Warrants	0	0		24
Common and preferred dividends paid	(936)	(723)		(564)
Payments Related to Tax Withholding for Share-based Compensation	(45)	(39)		(48)
Proceeds from the exercise of stock options	36	21		25
Net Cash Provided by (Used in) Financing Activities, Continuing Operations	8,165	(2,135)		12,649
Cash and Cash Equivalents, Period Increase (Decrease)	583	489		824
Cash and cash equivalents	6,912	6,423		5,599
Cash and cash equivalents	7,495	6,912		6,423
Supplemental Disclosures:
Interest Paid, Including Capitalized Interest, Operating and Investing Activities	1,151	730		559
Income Taxes Paid	130	415		813
Proceeds from Income Tax Refunds	(219)	(3)		(2)
Transfer of Loans Held-for-sale to Portfolio Loans	28	19		30
Transfer of Portfolio Loans and Leases to Held-for-sale	532	288		360
Transfer to Other Real Estate	62	57		59
Amortization Of Deferred Gain On Sale Lease Back Of Premises	6	17		43
Non-cash impact of debt acquired by purchaser in leverage lease sale	$ 373	$ 184		$ 74
[1]	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.
[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]	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]	ertain prior period amounts have been revised to reflect the impact of the Company’s adoption of ASU 2016-15. See Note 1

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]	NOTE 1 – SIGNIFICANT ACCOUNTING POLICIES General SunTrust is a financial services holding company headquartered in Atlanta, Georgia and is one of the nation’s largest commercial banking organizations. Through its principal subsidiary, SunTrust Bank, the Company offers a full line of financial services for consumers, businesses, corporations, institutions, and not-for-profit entities, both through branches ( located primarily in Florida, Georgia, Virginia, North Carolina, Tennessee, Maryland, South Carolina, and the District of Columbia ) and through other digital and national delivery channels . In addition to deposit, credit, mortgage banking, and trust and investment services provided by the Bank, the Company’s other subsidiaries provide capital markets, securities brokerage, investment banking, and wealth management services . The Company operates and measures business activity across two business segments: Consumer and Wholesale , with functional activities included in Corporate Other . For additional information on the Company’s business segments, see Note 22 , “Business Segment Reporting.” Principles of Consolidation and Basis of Presentation The Consolidated Financial Statements have been prepared in accordance with U.S. GAAP and include the accounts of the Company and its subsidiaries after elimination of significant intercompany accounts and transactions. In the opinion of management, all adjustments, consisting only of normal recurring adjustments that are necessary for a fair presentation of the results of operations in these financial statements, have been made. The Company holds VI s, which are contractual, ownership or other interests that fluctuate with changes in the fair value of a VIE’s net assets. The Company consolidates a VIE if it is the primary beneficiary, which is the party that has both the power to direct the activities that most significantly impact the financial performance of the VIE and the obligation to absorb losses or rights to receive benefits through its VI s that could potentially be significant to the VIE. To determine whether or not a VI held by the Company could potentially be significant to the VIE, both qualitative and quantitative factors regarding the nature, size, and form of the Company’s involvement with the VIE are considered. The assessment of whether or not the Company is the primary beneficiary of a VIE is performed on an ongoing basis. The Company consolidates VOE s that are controlled through the Company’s equity interests or by other means. Investments in entities for which the Company has the ability to exercise significant influence, but not control, over operating and financing decisions are accounted for using the equity method of accounting. These investments are included in Other assets in the Consolidated Balance Sheets at cost, adjusted to reflect the Company’s portion of income, loss, or dividends of the investee. For information on the Company’s equity investments that do not meet the criteria to be accounted for under the equity method and do not result in consolidation of the investee, see the “ Equity Securities ” section in this Note. Results of operations of acquired entities are included from the date of acquisition. Results of operations associated with entities or net assets sold are included through the date of disposition. The Company reports any noncontrolling interests in its subsidiaries in the equity section of the Consolidated Balance Sheets and separately presents the income or loss attributable to the noncontrolling interest of a consolidated subsidiary in its Consolidated Statements of Income. Assets and liabilities of acquired entities are accounted for under the acquisition method of accounting, whereby the purchase price of an acquired entity is allocated to the estimated fair value of the assets acquired and liabilities assumed at the date of acquisition. The excess of the purchase price over the amount allocated to the assets acquired and liabilities assumed is recorded as goodwill. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the Consolidated Financial Statements and accompanying Notes; actual results could vary from these estimates. Certain reclassifications have been made to prior period amounts to conform to the current period presentation. Cash and Cash Equivalents Cash and cash equivalents include Cash and due from banks, Interest-bearing deposits in other banks, Fed Funds sold, and Securities borrowed or purchased under agreements to resell. Cash and cash equivalents have maturities of three months or less, and accordingly, the carrying amount of these instruments is deemed to be a reasonable estimate of fair value. Trading Activities Various trading assets and liabilities are used as part of the Company’s overall balance sheet management strategies and to support client requirements. Trading assets and liabilities are measured at fair value with changes in fair value recognized within Noninterest income in the Company’s Consolidated Statements of Income. See Note 5 , “Trading Assets and Liabilities and Derivative Instruments,” for additional information on the Company’s trading activities. Investments The Company invests in various debt and equity securities that are not held for trading purposes. Debt securities that the Company might not hold until maturity are classified as securities AFS. Equity securities that are not held for trading purposes are recorded in Other assets on the Consolidated Balance Sheets. Securities Available for Sale The Company invests in various debt securities primarily as a store of liquidity and as part of the overall ALM process to optimize income and market performance over an entire interest rate cycle. Interest income on securities AFS is recognized on an accrual basis in Interest income in the Company’s Consolidated Statements of Income. Premiums and discounts on securities AFS are amortized or accreted as an adjustment to yield over the life of the security. The Company estimates principal prepayments on securities AFS for which prepayments are probable and the timing and amount of prepayments can be reasonably estimated. The estimates are informed by analyses of both historical prepayments and anticipated macroeconomic conditions, such as spot interest rates compared to implied forward interest rates. The estimate of prepayments for these securities impacts their lives and thereby the amortization or accretion of associated premiums and discounts. Securities AFS are measured at fair value with unrealized gains and losses, net of any tax effect, included in AOCI as a component of shareholders’ equity. Realized gains and losses, including OTTI , are determined using the specific identification method and are recognized as a component of Noninterest income in the Consolidated Statements of Income. Securities AFS are reviewed for OTTI on a quarterly basis. In determining whether OTTI exists for securities AFS in an unrealized loss position, the Company assesses whether it has the intent to sell the security or assesses the likelihood of selling the security prior to the recovery of its amortized cost basis. If the Company intends to sell the security or it is more-likely-than-not that the Company will be required to sell the security prior to the recovery of its amortized cost basis, the security is written down to fair value, and the full amount of any impairment charge is recognized as a component of Noninterest income in the Consolidated Statements of Income. If the Company does not intend to sell the security and it is more-likely-than-not that the Company will not be required to sell the security prior to recovery of its amortized cost basis, only the credit component of any impairment of a debt security is recognized as a component of Noninterest income in the Consolidated Statements of Income, with the amount of any remaining unrealized losses recorded in OCI . For additional information on the Company’s securities AFS, see Note 6 , “Investment Securities,” and Note 20 , “Fair Value Election and Measurement.” Equity Securities Equity securities that are not classified as trading assets or liabilities are recorded in Other assets on the Company’s Consolidated Balance Sheets. Equity securities with readily determinable fair values (marketable) are measured at fair value, with changes in the fair value recognized as a component of Noninterest income in the Company’s Consolidated Statements of Income. Marketable equity securities include mutual fund investments and other publicly traded equity securities. Dividends received from mutual fund investments are recognized within Interest income (Trading account interest and other), and dividends received from other marketable equity securities are recognized within Noninterest income in the Consolidated Statements of Income. Equity securities that do not have readily determinable fair values (nonmarketable) are accounted for at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or similar investment of the same issuer, also referred to as the measurement alternative. Any adjustments to the carrying value of these nonmarketable equity securities are recognized in Other noninterest income in the Company’s Consolidated Statements of Income. Nonmarketable equity securities include Federal Reserve Bank of Atlanta and FHLB of Atlanta capital stock, both held at cost, as well as other equity securities that the Company elected to account for under the measurement alternative. Dividends received from Federal Reserve Bank of Atlanta and FHLB of Atlanta capital stock are recognized within Interest income (Trading account interest and other), and dividends received from other nonmarketable equity securities are recognized in Other noninterest income in the Consolidated Statements of Income. For additional information on the Company’s equity securities, see Note 11 , “Other Assets,” and Note 20 , “Fair Value Election and Measurement.” Securities Sold Under Agreements to Repurchase and Securities Borrowed or Purchased Under Agreements to Resell Securities sold under agreements to repurchase and securities borrowed or purchased under agreements to resell are accounted for as collateralized financing transactions and are recorded at the amounts at which the securities were sold or acquired, plus accrued interest. The fair value of collateral pledged or received is continually monitored and additional collateral is obtained or requested to be returned to the Company as deemed appropriate. For additional information on the collateral pledged to secure repurchase agreements, see Note 4 , “Federal Funds Sold and Securities Financing Activities,” Note 5 , “Trading Assets and Liabilities and Derivatives,” and Note 6 , “Investment Securities.” Loans Held for Sale The Company’s LHFS generally includes certain commercial loans and consumer loans. Loans are initially classified as LHFS when they are individually identified as being available for immediate sale and management has committed to a formal plan to sell them. LHFS are recorded at either fair value, if elected, or the lower of cost or fair value. Any origination fees and costs for LHFS recorded at LOCOM are capitalized in the basis of the loan and are included in the calculation of realized gains and losses upon sale. Origination fees and costs are recognized in earnings at the time of origination for LHFS that are elected to be measured at fair value. Fair value is derived from observable current market prices, when available, and includes loan servicing value. When observable market prices are not available, the Company uses judgment and estimates fair value using internal models, in which the Company uses its best estimates of assumptions it believes would be used by market participants in estimating fair value. Adjustments to reflect unrealized gains and losses resulting from changes in fair value and realized gains and losses upon ultimate sale of the loans are classified as Noninterest income in the Consolidated Statements of Income. The Company may transfer certain loans to LHFS measured at LOCOM . At the time of transfer, any credit losses subject to charge-off in accordance with the Company’s policy are recorded as a reduction in the ALLL. Any subsequent losses, including those related to interest rate or liquidity related valuation adjustments, are recorded as a component of Noninterest income in the Consolidated Statements of Income. The Company may also transfer loans from LHFS to LHFI. If an LHFS for which fair value accounting was elected is transferred to held for investment, it will continue to be accounted for at fair value in the LHFI portfolio. For additional information on the Company’s LHFS activities, see Note 7 , “Loans.” Loans Held for Investment Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are considered LHFI. The Company’s loan balance is comprised of loans held in portfolio, including commercial loans and consumer loans. Interest income on loans, except those classified as nonaccrual, is accrued based upon the outstanding principal amounts using the effective yield method. Commercial loans (C&I, CRE, and commercial construction) are considered to be past due when payment is not received from the borrower by the contractually specified due date. The Company typically classifies commercial loans as nonaccrual when one of the following events occurs: (i) interest or principal has been past due 90 days or more, unless the loan is both well secured and in the process of collection; (ii) collection of contractual interest or principal is not anticipated; or (iii) income for the loan is recognized on a cash basis due to the deterioration in the financial condition of the debtor. When a loan is placed on nonaccrual, accrued interest is reversed against interest income. Interest income on commercial nonaccrual loans, if recognized, is recognized after the principal has been reduced to zero. If and when commercial borrowers demonstrate the ability to repay a loan classified as nonaccrual in accordance with its contractual terms, the loan may be returned to accrual status upon meeting all regulatory, accounting, and internal policy requirements. Consumer loans secured by residential real estate (guaranteed and nonguaranteed residential mortgages, residential home equity products, and residential construction loans) are considered to be past due when a monthly payment is due and unpaid for one month. Guaranteed residential mortgages continue to accrue interest regardless of delinquency status because collection of principal and interest is reasonably assured by the government. Nonguaranteed residential mortgages and residential construction loans are generally placed on nonaccrual when three payments are past due. Residential home equity products are generally placed on nonaccrual when payments are 90 days past due. The exceptions for nonguaranteed residential mortgages, residential construction loans, and residential home equity products are: (i) when the borrower has declared bankruptcy, in which case, they are moved to nonaccrual status once they become 60 days past due, (ii) loans discharged in Chapter 7 bankruptcy that have not been reaffirmed by the borrower, in which case, they are reclassified as TDRs and moved to nonaccrual status, and (iii) second lien loans, which are classified as nonaccrual when the first lien loan is classified as nonaccrual, even if the second lien loan is performing. When a loan is placed on nonaccrual, accrued interest is reversed against interest income. Interest income on nonaccrual consumer loans secured by residential real estate is recognized on a cash basis. Nonaccrual consumer loans secured by residential real estate are typically returned to accrual status once they no longer meet the delinquency threshold that resulted in them initially being moved to nonaccrual status, with the exception of the aforementioned Chapter 7 bankruptcy loans, which remain on nonaccrual until there is six months of payment performance following discharge by the bankruptcy court. All other consumer loans (guaranteed student, other direct, indirect, and credit card loans) are considered to be past due when payment is not received from the borrower by the contractually specified due date. Guaranteed student loans continue to accrue interest regardless of delinquency status because collection of principal and interest is reasonably assured. Other direct and indirect loans are typically placed on nonaccrual when payments have been past due for 90 days or more, except when the borrower has declared bankruptcy, in which case they are moved to nonaccrual status once they become 60 days past due. When a loan is placed on nonaccrual, accrued interest is reversed against interest income. Interest income on nonaccrual loans, if recognized, is recognized on a cash basis. Nonaccrual consumer loans are typically returned to accrual status once they are no longer past due. TDRs are loans in which the borrower is experiencing financial difficulty at the time of restructure and the borrower received an economic concession either from the Company or as the product of a bankruptcy court order. A restructuring that results in only a delay in payments that is insignificant is not considered an economic concession. To date, the Company’s TDRs have been predominantly first and second lien residential mortgages and home equity lines of credit. Prior to granting a modification of a borrower’s loan terms, the Company performs an evaluation of the borrower’s financial condition and ability to service under the potential modified loan terms. The types of concessions generally granted are extensions of the loan maturity date and/or reductions in the original contractual interest rate. In certain situations, the Company may offer to restructure a loan in a manner that ultimately results in the forgiveness of a contractually specified principal balance. Typically, if a loan is accruing interest at the time of modification, the loan remains on accrual status and is subject to the Company’s charge-off and nonaccrual policies. See the “Allowance for Credit Losses” section below for further information regarding these policies. If a loan is on nonaccrual before it is determined to be a TDR, then the loan remains on nonaccrual. Typically, TDRs may be returned to accrual status if there has been at least a six month sustained period of repayment performance by the borrower. Generally, once a loan becomes a TDR, the Company expects that the loan will continue to be reported as a TDR for its remaining life, even after returning to accruing status, unless the modified rates and terms at the time of modification were available to the borrower in the market or the loan is subsequently restructured with no concession to the borrower and the borrower is no longer in financial difficulty. Interest income recognition on impaired loans is dependent upon accrual status, TDR designation, and loan type as discussed above. For loans accounted for at amortized cost, fees and incremental direct costs associated with loan origination as well as premiums and discounts, are deferred and amortized over the respective loan terms. Fees received for providing loan commitments that result in funded loans are recognized over the term of the loan as an adjustment of the yield. If a loan is never funded, the commitment fee is recognized in Noninterest income at the expiration of the commitment period. For any newly-originated loans that are accounted for at fair value, the origination fees are recognized in Noninterest income while the origination costs are recognized in Noninterest expense, at the time of origination. For additional information on the Company’s LHFI activities, see Note 7 , “Loans.” Allowance for Credit Losses The allowance for credit losses is composed of the ALLL and the reserve for unfunded commitments. The Company’s ALLL reflects probable current inherent losses in the LHFI portfolio based on management’s evaluation of the size and current risk characteristics of the loan portfolio. The Company employs a variety of modeling and estimation techniques to measure credit risk and construct an appropriate and adequate ALLL. Quantitative and qualitative asset quality measures are considered in estimating the ALLL. Such evaluation considers a number of factors for each of the loan portfolio segments, including, but not limited to, net charge-off trends, internal risk ratings, changes in internal risk ratings, loss forecasts, collateral values, geographic location, delinquency rates, nonperforming and restructured loan status, origination channel, product mix, underwriting practices, industry conditions, and economic trends. Additionally, refreshed FICO scores are considered for consumer loans and single name borrower concentration is considered for commercial loans. These credit quality factors are incorporated into various loss estimation models and analytical tools utilized in the ALLL process and/or are qualitatively considered in evaluating the overall reasonableness of the ALLL. Large commercial nonaccrual loans as well as certain consumer and commercial loans whose terms have been modified in a TDR are reviewed to determine the amount of specific allowance required in accordance with applicable accounting guidance. A loan is considered impaired when, based on current information and events, it is probable that the Company will be unable to collect all amounts due, including principal and interest, according to the contractual terms of the agreement. If necessary, an allowance is established for these specifically evaluated impaired loans. The specific allowance established for these loans is based on a thorough analysis of the most probable source of repayment, including the present value of the loan’s expected future cash flows, the loan’s estimated market value, or the estimated fair value of the underlying collateral, net of estimated selling costs. Any change in the present value attributable to the passage of time is recognized through the Provision for credit losses. General allowances are established for loans and leases grouped into pools based on similar characteristics. In this process, general allowance factors are based on an analysis of historical charge-off experience, expected loss factors derived from the Company's internal risk rating process, portfolio trends, and regional and national economic conditions. Other adjustments may be made to the ALLL after an assessment of internal and external influences on credit quality that may not be fully reflected in the historical loss or risk rating data. These influences may include elements such as changes in credit underwriting, concentration risk, macroeconomic conditions, and/or recent observable asset quality trends. Commercial loans are charged off when they are considered uncollectible. Losses on unsecured consumer loans are generally recognized at 120 days past due, except for losses on credit cards, which are recognized when the loans are 180 days past due, and losses on guaranteed student loans, which are recognized when the loans are 270 days past due and payment from the guarantor is processed by the servicer. However, if the borrower is in bankruptcy, the loan is charged-off in the month the loan becomes 60 days past due. Losses, as appropriate, on consumer loans secured by residential real estate, are typically recognized at 120 or 180 days past due, depending on the loan and collateral type, in compliance with the FFIEC guidelines. However, if the borrower is in bankruptcy, the secured asset is evaluated once the loan becomes 60 days past due. The loan value in excess of the secured asset value is written down or charged-off after the valuation occurs. Additionally, if a residential loan is discharged in Chapter 7 bankruptcy and not reaffirmed by the borrower, the Company's policy is to immediately charge-off the excess of the carrying amount over the fair value of the collateral. The Company uses numerous sources of information when evaluating a property’s value. Estimated collateral valuations are based on appraisals, broker price opinions, recent sales of foreclosed properties, automated valuation models, other property-specific information, and relevant market information, supplemented by the Company’s internal property valuation analysis. The value estimate is based on an orderly disposition of the property, inclusive of marketing costs. In limited instances, the Company adjusts externally provided appraisals for justifiable and well-supported reasons, such as an appraiser not being aware of certain property-specific factors or recent sales information. For commercial loans secured by real estate, an acceptable third party appraisal or other form of evaluation, as permitted by regulation, is obtained prior to the origination of the loan and upon a subsequent transaction involving a material change in terms. In addition, updated valuations may be obtained during the life of a loan, as appropriate, such as when a loan’s performance materially deteriorates. In situations where an updated appraisal has not been received or a formal evaluation performed, the Company monitors factors that can positively or negatively impact property value, such as the date of the last valuation, the volatility of property values in specific markets, changes in the value of similar properties, and changes in the characteristics of individual properties. Changes in collateral value affect the ALLL through the risk rating or impaired loan evaluation process. Charge-offs are recognized when the amount of the loss is quantifiable and timing is known. The charge-off is measured based on the difference between the loan’s carrying value, including deferred fees, and the estimated realizable value of the property, net of estimated selling costs. When valuing a property for the purpose of determining a charge-off, a third party appraisal or an independently derived internal evaluation is generally employed. For nonguaranteed mortgage loans secured by residential real estate where the Company is proceeding with a foreclosure action, a new valuation is obtained prior to the loan becoming 180 days past due and, if required, the loan is written down to its realizable value, net of estimated selling costs. In the event the Company decides not to proceed with a foreclosure action, the full balance of the loan is charged-off. If a loan remains in the foreclosure process for 12 months past the original charge-off, the Company may obtain a new valuation. Any additional loss based on the new valuation is charged-off. At foreclosure, a new valuation is obtained and the loan is transferred to OREO at fair value less estimated selling costs; any loan balance in excess of the transfer value is charged-off. Estimated declines in value of the collateral between these formal evaluation events are captured in the ALLL based on changes in the house price index in the applicable metropolitan statistical area or other market information. In addition to the ALLL, the Company also estimates probable losses related to unfunded lending commitments, such as letters of credit and binding unfunded loan commitments. Unfunded lending commitments are analyzed and segregated by risk based on the Company’s internal risk rating scale. These risk classifications, in combination with probability of commitment usage, existing economic conditions, and any other pertinent information, result in the estimation of the reserve for unfunded lending commitments. The Unfunded commitments reserve is reported in Other liabilities on the Consolidated Balance Sheets and the provision associated with changes in the Unfunded commitment reserve is recognized in the Provision for credit losses in the Consolidated Statements of Income. For additional information on the Company’s allowance for credit loss activities, see Note 8 , “Allowance for Credit Losses.” Premises, Property, and Equipment Premises, property, and equipment are carried at cost less accumulated depreciation and amortization. Depreciation expense is calculated predominantly using the straight-line method over the assets’ estimated useful lives and is recorded within the corresponding Noninterest expense categories on the Consolidated Statements of Income. Leasehold improvements are amortized using the straight-line method over the shorter of the improvements’ estimated useful lives or the lease term. Construction in process includes costs related to in-process branch expansion and branch renovation projects. Those projects are maintained in premises, property, and equipment upon completion. Software is comprised of purchased software licenses as well as internally developed and customized software for internal use. Software development costs incurred during the planning and post-development phases are recorded in Outside processing and software expense in the Consolidated Statements of Income. Software costs incurred during the development execution phase, including costs associated with design, configuration, installation, coding, and testing are capitalized and amortized using the straight-line method over the estimated useful life of the software. Maintenance and repairs are charged to expense, and improvements that extend the useful life of an asset are capitalized and depreciated over the remaining useful life. Premises, property, and equipment are evaluated for impairment whenever events or changes in circumstances indicate that the carrying value of the asset may not be recoverable. For additional information on the Company’s premises, property, and equipment activities, see Note 9 , “ Premises, Property, and Equipment .” Goodwill and Other Intangible Assets Goodwill represents the excess purchase price over the fair value of identifiable net assets of acquired companies. Goodwill is assigned to reporting units that are expected to benefit from the synergies of the business combination. The Company conducts a qualitative goodwill assessment at the reporting unit level at least quarterly, or more frequently as events occur or circumstances change that would more-likely-than-not reduce the fair value of a reporting unit below its carrying amount. Factors considered in the Company’s qualitative assessment include financial performance, financial forecasts, macroeconomic conditions, industry and market conditions, cost factors, market capitalization, carrying value, and events affecting the reporting units. If, after considering all relevant events and circumstances, the Company determines it is more-likely-than-not that the fair value of a reporting unit is less than its carrying amount, then a quantitative impairment test is necessary to perform. If the Company elects to bypass the qualitative analysis, or concludes from the Company’s qualitative analysis that it is more-likely-than-not that the fair value of a reporting unit is less than its carrying amount, a two-step goodwill impairment test is performed either (i) annually as of October 1, or (ii) more frequently as considered necessary. In the first step of the impairment test, the fair value of each reporting unit is compared with its carrying amount. If the fair value is greater than the carrying amount, then the reporting unit’s goodwill is deemed not to be impaired. If the fair value is less than the carrying amount, then a second step is performed, which measures the amount of impairment by comparing the carrying amount of goodwill to its implied fair value. The Company has identified intangible assets with finite and indefinite lives. Intangible assets that have finite lives are amortized over their useful lives and carried at amortized cost. Intangible assets that have indefinite lives are initially measured at fair value and are not amortized until the useful life is no longer considered indefinite. Indefinite-lived intangibles are tested for impairment at least annually; however, all intangible assets are evaluated for impairment whenever events or changes in circumstances indicate it is more likely than not that the asset is impaired. For additional information on the Company’s activities related to goodwill and other intangibles, see Note 10 , “Goodwill and Other Intangible Assets.” Servicing Rights The Company recognizes as assets the right

Revenue Recognition (Notes)

Revenue Recognition (Notes)	12 Months Ended
	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Text Block]	NOTE 2 – REVENUE RECOGNITION Pursuant to the Company's adoption of ASC Topic 606, Revenue from Contracts with Customers , the following table reflects the Company’s noninterest income disaggregated by the amount of revenue that is in scope and out of scope of ASC Topic 606. (Dollars in millions) Year Ended December 31, 2018 Noninterest income Revenue in scope of ASC Topic 606 $1,992 Revenue out of scope of ASC Topic 606 1,234 Total noninterest income $3,226 The following tables further disaggregate the Company’s noninterest income by financial statement line item, business segment, and by the amount of each revenue stream that is in scope or out of scope of ASC Topic 606. The commentary following these tables describes the Company's accounting policies for recognizing noninterest income, including the nature and timing of such revenue streams. The Company's contracts with customers generally do not contain terms that require significant judgment to determine the amount of revenue to recognize. Year Ended December 31, 2018 1 (Dollars in millions) Consumer 2 Wholesale 2 Out of Scope 2, 3 Total Noninterest income Service charges on deposit accounts $444 $135 $— $579 Other charges and fees 4, 5 114 12 230 356 Card fees 216 104 4 324 Investment banking income 4 — 352 247 599 Trading income — — 161 161 Mortgage related income — — 342 342 Trust and investment management income 301 — 3 304 Retail investment services 6 289 2 1 292 Commercial real estate related income — — 134 134 Net securities gains — — 1 1 Other noninterest income 23 — 111 134 Total noninterest income $1,387 $605 $1,234 $3,226 1 Amounts are presented in accordance with ASC Topic 606, Revenue from Contracts with Customers , except for out of scope amounts. 2 Consumer total noninterest income and Wholesale total noninterest income exclude $417 million and $929 million of out of scope noninterest income, respectively, which are included in the business segment results presented on a management accounting basis in Note 22 , "Business Segment Reporting." Out of scope total noninterest income includes these amounts and also includes ($112) million of Corporate Other noninterest income that is not subject to ASC Topic 606. 3 The Company presents out of scope noninterest income for the purpose of reconciling noninterest income amounts within the scope of ASC Topic 606 to noninterest income amounts presented on the Company's Consolidated Statements of Income. 4 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. 5 The Company recognized an immaterial amount of insurance trailing commissions, the majority of which related to performance obligations satisfied in prior periods. 6 The Company recognized $50 million of mutual fund 12b-1 fees and annuity trailing commissions, the majority of which related to performance obligations satisfied in periods prior to December 31, 2018 . Year Ended December 31, 2017 1 (Dollars in millions) Consumer 2 Wholesale 2 Out of Scope 2, 3 Total Noninterest income Service charges on deposit accounts $460 $143 $— $603 Other charges and fees 4 124 12 225 361 Card fees 232 108 4 344 Investment banking income 4 — 371 252 623 Trading income — — 189 189 Mortgage related income — — 422 422 Trust and investment management income 302 — 7 309 Retail investment services 275 2 1 278 Commercial real estate related income — — 123 123 Net securities losses — — (108 ) (108 ) Gain on sale of subsidiary — — 107 107 Other noninterest income 26 — 77 103 Total noninterest income $1,419 $636 $1,299 $3,354 1 Amounts for periods prior to January 1, 2018 are presented in accordance with ASC Topic 605, Revenue Recognition , and have not been restated to conform with ASC Topic 606, Revenue from Contracts with Customers . 2 Consumer total noninterest income and Wholesale total noninterest income exclude $486 million and $937 million of out of scope noninterest income, respectively, which are included in the business segment results presented on a management accounting basis in Note 22 , "Business Segment Reporting." Out of scope total noninterest income includes these amounts and also includes ($124) million of Corporate Other noninterest income that is not subject to ASC Topic 606. 3 The Company presents out of scope noninterest income for the purpose of reconciling noninterest income amounts within the scope of ASC Topic 606 to noninterest income amounts presented on the Company's Consolidated Statements of Income. 4 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. Year Ended December 31, 2016 1 (Dollars in millions) Consumer 2 Wholesale 2 Out of Scope 2, 3 Total Noninterest income Service charges on deposit accounts $482 $148 $— $630 Other charges and fees 4 130 11 218 359 Card fees 228 93 6 327 Investment banking income 4 — 317 198 515 Trading income — — 211 211 Mortgage related income — — 555 555 Trust and investment management income 300 — 4 304 Retail investment services 277 3 1 281 Commercial real estate related income — — 69 69 Net securities gains — — 4 4 Other noninterest income 27 — 101 128 Total noninterest income $1,444 $572 $1,367 $3,383 1 Amounts for periods prior to January 1, 2018 are presented in accordance with ASC Topic 605, Revenue Recognition , and have not been restated to conform with ASC Topic 606, Revenue from Contracts with Customers . 2 Consumer total noninterest income and Wholesale total noninterest income exclude $623 million and $753 million of out of scope noninterest income, respectively, which are included in the business segment results presented on a management accounting basis in Note 22 , "Business Segment Reporting." Out of scope total noninterest income includes these amounts and also includes ($9) million of Corporate Other noninterest income that is not subject to ASC Topic 606. 3 The Company presents out of scope noninterest income for the purpose of reconciling noninterest income amounts within the scope of ASC Topic 606 to noninterest income amounts presented on the Company's Consolidated Statements of Income. 4 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. Service Charges on Deposit Accounts Service charges on deposit accounts represent fees relating to the Company’s various deposit products. These fees include account maintenance, cash management, treasury management, wire transfers, overdraft and other deposit-related fees. The Company’s execution of the services related to these fees represents its related performance obligations. Each of these performance obligations are either satisfied over time or at a point in time as the services are provided to the customer. The Company is the principal when rendering these services. Payments for services provided are either withdrawn from the customer’s account as services are rendered or in the billing period following the completion of the service. The transaction price for each of these fees is based on the Company’s predetermined fee schedule. Other Charges and Fees Other charges and fees consist primarily of loan commitment and letter of credit fees, operating lease revenue, ATM fees, insurance revenue, and miscellaneous service charges including wire fees and check cashing fees. Loan commitment and letter of credit fees and operating lease revenue are out of scope of ASC Topic 606. The Company’s execution of the services related to ATM fees, insurance revenue, and miscellaneous service charges represents its related performance obligations. ATM fees and miscellaneous service charges are recognized at a point in time as the services are provided. Insurance commission revenue is earned through the sale of insurance products. The commissions are recognized as revenue when the customer executes an insurance policy with the insurance carrier. In some cases, the Company receives payment of trailing commissions each year when the customer pays its annual premium. Card Fees Card fees consist of interchange fees from credit and debit cards, merchant acquirer revenue, and other card related services. Interchange fees are earned by the Company each time a request for payment is initiated by a customer at a merchant for which the Company transfers the funds on behalf of the customer. Interchange rates are set by the payment network and are based on purchase volumes and other factors. Interchange fees are received daily and recognized at a point in time when the card transaction is processed. The Company is considered an agent of the customer and incurs costs with the payment network to facilitate the interchange with the merchant; therefore, the related payment network expense is recognized as a reduction of card fees. For all periods prior to January 1, 2018, these expenses were recognized in Outside processing and software in the Company's Consolidated Statements of Income. The Company offers rewards and/or rebates to its customers based on card usage. The costs associated with these programs are recognized as a reduction of card fees. The Company also has a revenue sharing agreement with a merchant acquirer. The Company’s referral of a merchant to the merchant acquirer represents its related performance obligation, which is satisfied at a point in time when the referral is made. Monthly revenue is estimated based on the expected amount of transactions processed. Payments are generally made by the merchant acquirer quarterly in the month following the quarter in which the services are rendered. Investment Banking Income Investment banking income is comprised primarily of securities underwriting fees, advisory fees, loan syndication fees, and trade execution services revenue. The Company assists corporate clients in raising capital by offering equity or debt securities to potential investors. The underwriting fees are earned on the trade date when the Company, as a member of an underwriting syndicate, purchases the securities from the issuer and sells the securities to third party investors. Each member of the syndicate is responsible for selling its portion of the underwriting and is liable for the proportionate costs of the underwriting; therefore, the Company’s portion of underwriting revenue and expense is presented gross within noninterest income and noninterest expense. For all periods prior to January 1, 2018, underwriting expense was recorded as a reduction of investment banking income. The transaction price is based on a percentage of the total transaction amount and payments are settled shortly after the trade date. The Company also provides merger and acquisition advisory services, including various activities such as business valuation, identification of potential targets or acquirers, and the issuance of fairness opinions. The Company’s execution of these advisory services represents its related performance obligations. The performance obligations relating to advisory services are fulfilled at a point in time upon completion of the contractually specified merger or acquisition. The transaction price is based on contractually specified terms agreed upon with the client for each advisory service. Loan syndication fees are typically recognized at the closing of a loan syndication transaction. These fees are out of the scope of ASC Topic 606. Revenue related to trade execution services is earned on the trade date and recognized at a point in time. The fees related to trade execution services are due on the settlement date. Trading Income The Company recognizes trading income as a result of gains and losses from the sales of trading account assets and liabilities. The Company also recognizes trading income as a result of changes in the fair value of trading account assets and liabilities that it holds. The Company’s trading accounts include various types of debt and equity securities, trading loans, and derivative instruments. For additional information relating to trading income, see Note 19 , “Derivative Financial Instruments,” and Note 20 , “Fair Value Election and Measurement.” Mortgage Related Income Mortgage related income is comprised of mortgage production related income and mortgage servicing related income. Mortgage production related income is comprised primarily of activity related to the sale of consumer mortgage loans as well as loan origination fees such as closing charges, document review fees, application fees, other loan origination fees, and loan processing fees. The Company recognizes as assets the rights to service mortgage loans, either when the loans are sold and the associated servicing rights are retained or when servicing rights are purchased from a third party. Mortgage servicing related income includes servicing fees, modification fees, fees for ancillary services, other fees customarily associated with servicing arrangements, gains or losses from hedging, and changes in the fair value of residential MSRs inclusive of decay resulting from the realization of monthly net servicing cash flows. For additional information relating to mortgage related income, see Note 1 , “Significant Accounting Policies,” Note 10 , “Goodwill and Other Intangible Assets,” Note 19 , “Derivative Financial Instruments,” and Note 20 , “Fair Value Election and Measurement.” Trust and Investment Management Income Trust and investment management income includes revenue from custodial services, trust administration, financial advisory services, employee benefit solutions, and other services provided to customers within the Consumer business segment. The Company generally recognizes trust and investment management revenue over time as services are rendered. Revenue is based on either a percentage of the market value of the assets under management, or advisement, or fixed based on the services provided to the customer. Fees are generally swept from the customer’s account one billing period in arrears based on the prior period’s assets under management or advisement. Retail Investment Services Retail investment services consists primarily of investment management, selling and distribution services, and trade execution services. The Company’s execution of these services represents its related performance obligations. Investment management fees are generally recognized over time as services are rendered and are based on either a percentage of the market value of the assets under management, or advisement, or fixed based on the services provided to the customer. The fees are calculated quarterly and are usually collected at the beginning of the period from the customer’s account and recognized ratably over the related billing period. The Company also offers selling and distribution services and earns commissions through the sale of annuity and mutual fund products. The Company acts as an agent in these transactions and recognizes revenue at a point in time when the customer enters into an agreement with the product carrier. The Company may also receive trailing commissions and 12b-1 fees related to mutual fund and annuity products, and recognizes this revenue in the period that they are realized since the revenue cannot be accurately predicted at the time the policy becomes effective. Trade execution commissions are earned and recognized on the trade date, when the Company executes a trade for a customer. Payment for the trade execution is due on the settlement date. Commercial Real Estate Related Income Commercial real estate related income consists primarily of origination fees, such as loan placement and broker fees, gains and losses on the sale of commercial loans, commercial mortgage loan servicing fees, income from community development investments, including the sale of tax credits, gains and losses from the sale of structured real estate, and other fee income. For additional information relating to commercial real estate related income, see Note 1 , “Significant Accounting Policies,” Note 10 , “Goodwill and Other Intangible Assets,” Note 19 , “Derivative Financial Instruments,” and Note 20 , “Fair Value Election and Measurement.” Net Securities Gains or Losses The Company recognizes net securities gains or losses primarily as a result of the sale of securities AFS and the recognition of any OTTI on securities AFS. For additional information relating to net securities gains or losses, see Note 6 , “Investment Securities.” Other Noninterest Income Other noninterest income within the scope of ASC Topic 606 consists primarily of fees from the sale of customized personal checks. The Company serves as an agent for customers by connecting them with a third party check provider. Revenue from such sales are earned in the form of commissions from the third party check provider and is recognized at a point in time on the date the customer places an order. Commissions for personal check orders are credited to revenue on an ongoing basis, and commissions for commercial check orders are received quarterly in arrears. Other noninterest income also includes income from bank-owned life insurance policies that is not within the scope of ASC Topic 606. Income from bank-owned life insurance primarily represents changes in the cash surrender value of such life insurance policies held on certain key employees, for which the Company is the owner and beneficiary. Revenue is recognized in each period based on the change in the cash surrender value during the period. Practical Expedients and Other The Company has elected the practical expedient to exclude disclosure of unsatisfied performance obligations for (i) contracts with an original expected length of one year or less and (ii) contracts for which the Company recognizes revenue at the amount to which the Company has the right to invoice for services performed. The Company pays sales commissions as a cost to obtain certain contracts within the scope of ASC Topic 606; however, sales commissions relating to these contracts are generally expensed when incurred because the amortization period would be one year or less. Sales commissions are recognized as employee compensation within Noninterest expense on the Company’s Consolidated Statements of Income. At December 31, 2018 , the Company does not have any material contract assets, liabilities, or other receivables recorded on its Consolidated Balance Sheets relating to its revenue streams within the scope of ASC

Acquisitions_Dispositions (Note

Acquisitions/Dispositions (Notes)	12 Months Ended
	Dec. 31, 2018
Acquisitions/Dispositions [Abstract]
Mergers, Acquisitions and Dispositions Disclosures [Text Block]	NOTE 3 - ACQUISITIONS/DISPOSITIONS During the years ended December 31, 2018, 2017, and 2016 , the Company had the following notable acquisition and disposition: (Dollars in millions) Date Consideration Received/(Paid) Goodwill Other Intangible Assets Pre-tax Gain 2017 Sale of PAC 12/1/2017 $261 ($7 ) $— $107 2016 Acquisition of Pillar 12/15/2016 ($197 ) $1 $13 1 $— 1 Does not include $62 million of commercial mortgage servicing rights acquired. Sale of PAC In 2017, the Company completed the sale of PAC , its commercial lines insurance premium finance subsidiary with $1.3 billion in assets and $1.2 billion in liabilities, to IPFS Corporation. As a result, the Company received consideration of $261 million and recognized a pre-tax gain of $107 million in connection with the sale, net of transaction-related expenses. The Company's results for the years ended December 31 , 2017 and 2016 included the following related to PAC , excluding the gain on sale: (Dollars in millions) PAC Financial Information: 2017 2016 Revenue $56 $60 Less: Expenses 31 27 Income before provision for income taxes $25 $33 The financial results of PAC through the date of disposition, including the gain on sale, are reflected in the Company's Wholesale business segment for the years ended December 31 , 2017 and 2016 . Acquisition of Pillar In 2016, the Company completed the acquisition of substantially all of the assets of the operating subsidiaries of Pillar Financial, LLC, a multi-family agency lending and servicing company with an originate-to-distribute focus that holds licenses with Fannie Mae , Freddie Mac , and the FHA . The acquired assets include Pillar 's multi-family lending business, which is comprised of multi-family affordable housing, health care properties, senior housing, and manufactured housing specialty teams. Additionally, the transaction includes Cohen Financial's commercial real estate investor services business, which provides loan administration, advisory, and commercial mortgage brokerage services. During the second quarter of 2017, the final settlement amount associated with working capital adjustments was reached and the purchase consideration of $197 million was finalized. There were no other material acquisitions or dispositions during the three years ended December 31, 2018

Federal Funds Sold and Securiti

Federal Funds Sold and Securities Financing Activities	12 Months Ended
	Dec. 31, 2018
Securities Purchased under Agreements to Resell [Abstract]
Repurchase Agreements, Resale Agreements, Securities Borrowed, and Securities Loaned Disclosure [Text Block]	NOTE 4 - FEDERAL FUNDS SOLD AND SECURITIES FINANCING ACTIVITIES Federal Funds Sold and Securities Borrowed or Purchased Under Agreements to Resell Fed Funds sold and securities borrowed or purchased under agreements to resell were as follows: (Dollars in millions) December 31, 2018 December 31, 2017 Fed funds sold $42 $65 Securities borrowed 394 298 Securities purchased under agreements to resell 1,243 1,175 Total Fed funds sold and securities borrowed or purchased under agreements to resell $1,679 $1,538 Securities purchased under agreements to resell are primarily collateralized by U.S. government or agency securities and are carried at the amounts at which the securities will be subsequently resold, plus accrued interest. Securities borrowed are primarily collateralized by corporate securities. The Company borrows securities and purchases securities under agreements to resell as part of its securities financing activities. On the acquisition date of these securities, the Company and the related counterparty agree on the amount of collateral required to secure the principal amount loaned under these arrangements. The Company monitors collateral values daily and calls for additional collateral to be provided as warranted under the respective agreements. At December 31, 2018 and 2017 , the total market value of collateral held was $1.6 billion and $1.5 billion , of which $108 million and $177 million was repledged, respectively. Securities Sold Under Agreements to Repurchase Securities sold under agreements to repurchase are accounted for as secured borrowings. The following table presents the Company’s related activity, by collateral type and remaining contractual maturity: December 31, 2018 December 31, 2017 (Dollars in millions) Overnight and Continuous Up to 30 days 30-90 days Total Overnight and Continuous Up to 30 days 30-90 days Total U.S. Treasury securities $197 $7 $— $204 $95 $— $— $95 Federal agency securities 112 10 — 122 101 15 — 116 MBS - agency 881 35 — 916 694 135 — 829 CP 78 — — 78 19 — — 19 Corporate and other debt securities 216 158 80 454 316 88 40 444 Total securities sold under agreements to repurchase $1,484 $210 $80 $1,774 $1,225 $238 $40 $1,503 For securities sold under agreements to repurchase, the Company would be obligated to provide additional collateral in the event of a significant decline in fair value of the collateral pledged. This risk is managed by monitoring the liquidity and credit quality of the collateral, as well as the maturity profile of the transactions. Netting of Securities - Repurchase and Resell Agreements The Company has various financial assets and financial liabilities that are subject to enforceable master netting agreements or similar agreements. The Company's derivatives that are subject to enforceable master netting agreements or similar agreements are discussed in Note 19 , "Derivative Financial Instruments." The following table presents the Company's securities borrowed or purchased under agreements to resell and securities sold under agreements to repurchase that are subject to MRA s. Generally, MRA s require collateral to exceed the asset or liability recognized on the balance sheet. Transactions subject to these agreements are treated as collateralized financings, and those with a single counterparty are permitted to be presented net on the Company's Consolidated Balance Sheets, provided certain criteria are met that permit balance sheet netting. At December 31, 2018 and 2017 , there were no such transactions subject to legally enforceable MRA s that were eligible for balance sheet netting. The following table includes the amount of collateral pledged or received related to exposures subject to enforceable MRA s. While these agreements are typically over-collateralized, the amount of collateral presented in this table is limited to the amount of the related recognized asset or liability for each counterparty. (Dollars in millions) Gross Amount Amount Offset Net Amount Presented in Consolidated Balance Sheets Held/Pledged Financial Instruments Net Amount December 31, 2018 Financial assets: Securities borrowed or purchased under agreements to resell $1,637 $— $1,637 1 $1,624 $13 Financial liabilities: Securities sold under agreements to repurchase 1,774 — 1,774 1,774 — December 31, 2017 Financial assets: Securities borrowed or purchased under agreements to resell $1,473 $— $1,473 1 $1,462 $11 Financial liabilities: Securities sold under agreements to repurchase 1,503 — 1,503 1,503 — 1 Excludes $42 million and $65 million of Fed Funds sold, which are not subject to a master netting agreement at December 31, 2018 and 2017

Trading Assets and Liabilities

Trading Assets and Liabilities and Derivatives Trading Assets and Liabilities and Derivatives	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Trading Assets and Liabilities and Derivatives [Text Block]	NOTE 5 - TRADING ASSETS AND LIABILITIES AND DERIVATIVE INSTRUMENTS The fair values of the components of trading assets and liabilities and derivative instruments are presented in the following table: (Dollars in millions) December 31, 2018 December 31, 2017 Trading Assets and Derivative Instruments: U.S. Treasury securities $262 $157 Federal agency securities 188 395 U.S. states and political subdivisions 54 61 MBS - agency 860 700 Corporate and other debt securities 700 655 CP 190 118 Equity securities 73 56 Derivative instruments 1 639 802 Trading loans 2 2,540 2,149 Total trading assets and derivative instruments $5,506 $5,093 Trading Liabilities and Derivative Instruments: U.S. Treasury securities $801 $577 MBS - agency 3 — Corporate and other debt securities 385 289 Equity securities 5 9 Derivative instruments 1 410 408 Total trading liabilities and derivative instruments $1,604 $1,283 1 Amounts include the impact of offsetting cash collateral received from and paid to the same derivative counterparties, and the impact of netting derivative assets and derivative liabilities when a legally enforceable master netting agreement or similar agreement exists. 2 Includes loans related to TRS . Various trading and derivative instruments are used as part of the Company’s overall balance sheet management strategies and to support client requirements executed through the Bank and/or STRH , a broker/dealer subsidiary of the Company. The Company manages the potential market volatility associated with trading instruments by using appropriate risk management strategies. The size, volume, and nature of the trading products and derivative instruments can vary based on economic conditions as well as client-specific and Company-specific asset or liability positions. Product offerings to clients include debt securities, loans traded in the secondary market, equity securities, derivative contracts, and other similar financial instruments. Other trading- related activities include acting as a market maker for certain debt and equity security transactions, derivative instrument transactions, and foreign exchange transactions. The Company also uses derivatives to manage its interest rate and market risk from non-trading activities. The Company has policies and procedures to manage market risk associated with client trading and non-trading activities, and assumes a limited degree of market risk by managing the size and nature of its exposure. For valuation assumptions and additional information related to the Company's trading products and derivative instruments, see Note 19 , “Derivative Financial Instruments,” and the “ Trading Assets and Derivative Instruments and Investment Securities ” section of Note 20 , “Fair Value Election and Measurement.” Pledged trading assets are presented in the following table: (Dollars in millions) December 31, 2018 December 31, 2017 Pledged trading assets to secure repurchase agreements 1 $1,418 $1,016 Pledged trading assets to secure certain derivative agreements 22 72 Pledged trading assets to secure other arrangements 40 41 1 Repurchase agreements secured by collateral totaled $1.4 billion and $975 million at December 31, 2018 and 2017

Securities Available for Sale

Securities Available for Sale	12 Months Ended
	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Securities Available for Sale	NOTE 6 – INVESTMENT SECURITIES Investment Securities Portfolio Composition December 31, 2018 (Dollars in millions) Amortized Unrealized Unrealized Fair Securities AFS: U.S. Treasury securities $4,277 $— $66 $4,211 Federal agency securities 221 2 2 221 U.S. states and political subdivisions 606 4 21 589 MBS - agency residential 23,161 128 425 22,864 MBS - agency commercial 2,688 8 69 2,627 MBS - non-agency commercial 943 — 27 916 Corporate and other debt securities 14 — — 14 Total securities AFS $31,910 $142 $610 $31,442 December 31, 2017 1 (Dollars in millions) Amortized Unrealized Unrealized Fair Securities AFS: U.S. Treasury securities $4,361 $2 $32 $4,331 Federal agency securities 257 3 1 259 U.S. states and political subdivisions 618 7 8 617 MBS - agency residential 22,616 222 134 22,704 MBS - agency commercial 2,121 3 38 2,086 MBS - non-agency residential 55 4 — 59 MBS - non-agency commercial 862 7 3 866 ABS 6 2 — 8 Corporate and other debt securities 17 — — 17 Total securities AFS $30,913 $250 $216 $30,947 1 Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability . See Note 11 , "Other Assets," for additional information. The following table presents interest on securities AFS: Year Ended December 31 (Dollars in millions) 2018 2017 2016 Taxable interest $830 $743 $630 Tax-exempt interest 19 13 6 Total interest on securities AFS 1 $849 $756 $636 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 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 . Investment securities pledged to secure public deposits, repurchase agreements, trusts, certain derivative agreements, and other funds had a fair value of $3.3 billion and $4.3 billion at December 31, 2018 and 2017 , respectively. The following table presents the amortized cost, fair value, and weighted average yield of the Company's investment securities at December 31, 2018 , by remaining contractual maturity, with the exception of MBS , which are based on estimated average life. Receipt of cash flows may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without penalties. Distribution of Remaining Maturities (Dollars in millions) Due in 1 Year or Less Due After 1 Year through 5 Years Due After 5 Years through 10 Years Due After 10 Years Total Amortized Cost: Securities AFS: U.S. Treasury securities $315 $2,646 $1,316 $— $4,277 Federal agency securities 112 29 8 72 221 U.S. states and political subdivisions 2 81 15 508 606 MBS - agency residential 1,558 3,684 15,962 1,957 23,161 MBS - agency commercial 1 495 1,885 307 2,688 MBS - non-agency commercial — 12 931 — 943 Corporate and other debt securities — 14 — — 14 Total securities AFS $1,988 $6,961 $20,117 $2,844 $31,910 Fair Value: Securities AFS: U.S. Treasury securities $312 $2,603 $1,296 $— $4,211 Federal agency securities 113 29 8 71 221 U.S. states and political subdivisions 2 84 16 487 589 MBS - agency residential 1,607 3,655 15,682 1,920 22,864 MBS - agency commercial 1 483 1,845 298 2,627 MBS - non-agency commercial — 12 904 — 916 Corporate and other debt securities — 14 — — 14 Total securities AFS $2,035 $6,880 $19,751 $2,776 $31,442 Weighted average yield 1 3.05 % 2.25 % 2.98 % 3.11 % 2.84 % 1 Weighted average yields are based on amortized cost and presented on an FTE basis. Investment Securities in an Unrealized Loss Position The Company held certain investment securities where amortized cost exceeded fair value, resulting in unrealized loss positions. Market changes in interest rates and credit spreads may result in temporary unrealized losses as the market prices of securities fluctuate. At December 31, 2018 , the Company did not intend to sell these securities nor was it more-likely-than-not that the Company would be required to sell these securities before their anticipated recovery or maturity. The Company reviewed its portfolio for OTTI in accordance with the accounting policies described in Note 1 , "Significant Accounting Policies." Investment securities in an unrealized loss position at period end are presented in the following tables: December 31, 2018 Less than twelve months Twelve months or longer Total (Dollars in millions) Fair Unrealized 1 Fair Unrealized 1 Fair Unrealized 1 Temporarily impaired securities AFS: U.S. Treasury securities $— $— $4,177 $66 $4,177 $66 Federal agency securities — — 63 2 63 2 U.S. states and political subdivisions 49 1 430 20 479 21 MBS - agency residential 1,229 5 15,384 420 16,613 425 MBS - agency commercial 68 — 1,986 69 2,054 69 MBS - non-agency commercial 106 1 773 26 879 27 Corporate and other debt securities — — 9 — 9 — Total temporarily impaired securities AFS 1,452 7 22,822 603 24,274 610 OTTI securities AFS 2 : Total OTTI securities AFS — — — — — — Total impaired securities AFS $1,452 $7 $22,822 $603 $24,274 $610 1 Unrealized losses less than $0.5 million are presented as zero within the table. 2 OTTI securities AFS are impaired securities for which OTTI credit losses have been previously recognized in earnings. December 31, 2017 1 Less than twelve months Twelve months or longer Total (Dollars in millions) Fair Value Unrealized 2 Losses Fair Value Unrealized 2 Losses Fair Value Unrealized 2 Losses Temporarily impaired securities AFS: U.S. Treasury securities $1,993 $12 $841 $20 $2,834 $32 Federal agency securities 23 — 60 1 83 1 U.S. states and political subdivisions 267 3 114 5 381 8 MBS - agency residential 8,095 38 4,708 96 12,803 134 MBS - agency commercial 887 9 915 29 1,802 38 MBS - non-agency commercial 134 1 93 2 227 3 ABS — — 4 — 4 — Corporate and other debt securities 10 — — — 10 — Total temporarily impaired securities AFS 11,409 63 6,735 153 18,144 216 OTTI securities AFS 3 : ABS — — 1 — 1 — Total OTTI securities AFS — — 1 — 1 — Total impaired securities AFS $11,409 $63 $6,736 $153 $18,145 $216 1 Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability . 2 Unrealized losses less than $0.5 million are presented as zero within the table. 3 OTTI securities AFS are impaired securities for which OTTI credit losses have been previously recognized in earnings. The Company does not consider the unrealized losses on temporarily impaired securities AFS to be credit-related. These unrealized losses were due primarily to market interest rates being higher than the securities' stated coupon rates, and therefore, they were recorded in AOCI, net of tax. Realized Gains and Losses and Other-Than-Temporarily Impaired Securities Net securities gains or losses are comprised of gross realized gains, gross realized losses, and OTTI credit losses recognized in earnings. Year Ended December 31 (Dollars in millions) 2018 2017 2016 Gross realized gains $9 $3 $4 Gross realized losses (8 ) (110 ) — OTTI credit losses recognized in earnings — (1 ) — Net securities gains/(losses) $1 ($108 ) $4 Investment securities in an unrealized loss position are evaluated quarterly for other-than-temporary credit impairment, which is determined using cash flow analyses that take into account security specific collateral and transaction structure. Future expected credit losses are determined using various assumptions, the most significant of which include default rates, prepayment rates, and loss severities. If, based on this analysis, a security is in an unrealized loss position and the Company does not expect to recover the entire amortized cost basis of the security, the expected cash flows are then discounted at the security’s initial effective interest rate to arrive at a present value amount. Credit losses on the OTTI security are recognized in earnings and reflect the difference between the present value of cash flows expected to be collected and the amortized cost basis of the security. Subsequent credit losses may be recorded on OTTI securities without a corresponding further decline in fair value when there has been a decline in expected cash flows. See Note 1 , "Significant Accounting Policies," for additional information regarding the Company's accounting policy on securities AFS and related impairments. During the year ended December 31, 2018 , there were no credit impairment losses recognized on securities AFS held at the end of the period. During the years ended December 31, 2017 and 2016 , credit impairment losses recognized on securities AFS held at the end of each period were immaterial. During the year ended December 31, 2018 , the Company sold securities AFS that had accumulated OTTI credit losses of $23 million and recognized an associated gain on sale of $6 million in Net securities gains/(losses) on the Consolidated Statements of Income. The accumulated balance of OTTI credit losses recognized in earnings on securities AFS held at period end was zero , $23 million , and $23 million at December 31, 2018, 2017, and 2016

Loans

Loans	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Loans, Notes, Trade and Other Receivables, Excluding Allowance for Credit Losses [Text Block]	NOTE 7 - LOANS Composition of Loan Portfolio (Dollars in millions) December 31, 2018 December 31, 2017 Commercial loans: C&I 1 $71,137 $66,356 CRE 7,265 5,317 Commercial construction 2,538 3,804 Total commercial LHFI 80,940 75,477 Consumer loans: Residential mortgages - guaranteed 459 560 Residential mortgages - nonguaranteed 2 28,836 27,136 Residential home equity products 9,468 10,626 Residential construction 184 298 Guaranteed student 7,229 6,633 Other direct 10,615 8,729 Indirect 12,419 12,140 Credit cards 1,689 1,582 Total consumer LHFI 70,899 67,704 LHFI $151,839 $143,181 LHFS 3 $1,468 $2,290 1 Includes $4.1 billion and $3.7 billion of lease financing, and $796 million and $778 million of installment loans at December 31, 2018 and 2017 , respectively. 2 Includes $163 million and $196 million of LHFI measured at fair value at December 31, 2018 and 2017 , respectively. 3 Includes $1.2 billion and $1.6 billion of LHFS measured at fair value at December 31, 2018 and 2017 , respectively. Loan Purchases, Sales, and Transfers Year Ended December 31 (Dollars in millions) 2018 2017 Non-routine purchases of LHFI: 1 Consumer loans $101 $233 Routine purchases of LHFI: 2 Consumer loans 2,122 1,729 Loan sales: 3, 4 Commercial loans 170 703 Consumer loans 99 2 Transfers of loans from: LHFI to LHFS 532 288 LHFS to LHFI 28 19 LHFI to OREO 62 57 1 Purchases are episodic in nature and are conducted based on specific business strategies. 2 Purchases are routine in nature and are conducted in the normal course of business. 3 Excludes sales of residential and commercial mortgage LHFS conducted in the normal course of business. 4 Net gain on loan sales were immaterial during the years ended December 31, 2018 and 2017 . At December 31, 2018 and 2017 , the Company had $28.1 billion and $24.3 billion of net eligible loan collateral pledged to the Federal Reserve discount window to support $21.3 billion and $18.2 billion of available, unused borrowing capacity, respectively. At December 31, 2018 and 2017 , the Company had $39.2 billion and $38.0 billion of net eligible loan collateral pledged to the FHLB of Atlanta to support $31.0 billion and $30.5 billion of available borrowing capacity, respectively. The available FHLB borrowing capacity at December 31, 2018 was used to support $5.0 billion of long-term debt and $5.8 billion of letters of credit issued on the Company's behalf. At December 31, 2017 , the available FHLB borrowing capacity was used to support $4 million of long-term debt and $6.7 billion of letters of credit issued on the Company's behalf. Credit Quality Evaluation The Company evaluates the credit quality of its loan portfolio by employing a dual internal risk rating system, which assigns both PD and LGD ratings to derive expected losses. Assignment of these ratings are predicated upon numerous factors, including consumer credit risk scores, rating agency information, borrower/guarantor financial capacity, LTV ratios, collateral type, debt service coverage ratios, collection experience, other internal metrics/analyses, and/or qualitative assessments. For the commercial portfolio, the Company believes that the most appropriate credit quality indicator is an individual loan’s risk assessment expressed according to the broad regulatory agency classifications of Pass or Criticized. The Company conforms to the following regulatory classifications for Criticized assets: Other Assets Especially Mentioned (or Special Mention), Substandard, Doubtful, and Loss. However, for the purposes of disclosure, management believes the most meaningful distinction within the Criticized categories is between Criticized accruing (which includes Special Mention and a portion of Substandard) and Criticized nonaccruing (which includes a portion of Substandard as well as Doubtful and Loss). This distinction identifies those relatively higher risk loans for which there is a basis to believe that the Company will not collect all amounts due under those loan agreements. The Company's risk rating system is more granular, with multiple risk ratings in both the Pass and Criticized categories. Pass ratings reflect relatively low PD s; whereas, Criticized assets have higher PD s. The granularity in Pass ratings assists in establishing pricing, loan structures, approval requirements, reserves, and ongoing credit management requirements. Commercial risk ratings are refreshed at least annually, or more frequently as appropriate, based upon considerations such as market conditions, borrower characteristics, and portfolio trends. Additionally, management routinely reviews portfolio risk ratings, trends, and concentrations to support risk identification and mitigation activities. As reflected in the following risk rating table, the increases in Pass and Criticized accruing C&I loans at December 31, 2018 compared to December 31, 2017 , were due to loan growth and normal variability in the portfolio. Criticized nonaccruing C&I loans remained low compared to December 31, 2017 . For consumer loans, the Company monitors credit risk based on indicators such as delinquencies and FICO scores. The Company believes that consumer credit risk, as assessed by the industry-wide FICO scoring method, is a relevant credit quality indicator. Borrower-specific FICO scores are obtained at origination as part of the Company’s formal underwriting process, and refreshed FICO scores are obtained by the Company at least quarterly. For guaranteed loans, the Company monitors the credit quality based primarily on delinquency status, as it is a more relevant indicator of credit quality due to the government guarantee. At December 31, 2018 and 2017 , 27% and 28% , respectively, of guaranteed residential mortgages were current with respect to payments. At December 31, 2018 and 2017 , 72% and 75% , respectively, of guaranteed student loans were current with respect to payments. The Company's loss exposure on guaranteed residential mortgages and student loans is mitigated by the government guarantee. LHFI by credit quality indicator are presented in the following tables: Commercial Loans C&I CRE Commercial Construction (Dollars in millions) December 31, 2018 December 31, 2017 December 31, 2018 December 31, 2017 December 31, 2018 December 31, 2017 Risk rating: Pass $69,095 $64,546 $7,165 $5,126 $2,459 $3,770 Criticized accruing 1,885 1,595 98 167 79 33 Criticized nonaccruing 157 215 2 24 — 1 Total $71,137 $66,356 $7,265 $5,317 $2,538 $3,804 Consumer Loans 1 Residential Mortgages - Nonguaranteed Residential Home Equity Products Residential Construction (Dollars in millions) December 31, 2018 December 31, 2017 December 31, 2018 December 31, 2017 December 31, 2018 December 31, 2017 Current FICO score range: 700 and above $25,764 $23,602 $8,060 $8,946 $151 $240 620 - 699 2,367 2,721 1,015 1,242 27 50 Below 620 2 705 813 393 438 6 8 Total $28,836 $27,136 $9,468 $10,626 $184 $298 Other Direct Indirect Credit Cards (Dollars in millions) December 31, 2018 December 31, 2017 December 31, 2018 December 31, 2017 December 31, 2018 December 31, 2017 Current FICO score range: 700 and above $9,642 $7,929 $9,315 $9,094 $1,142 $1,088 620 - 699 935 757 2,395 2,344 420 395 Below 620 2 38 43 709 702 127 99 Total $10,615 $8,729 $12,419 $12,140 $1,689 $1,582 1 Excludes $7.2 billion and $6.6 billion of guaranteed student loans and $459 million and $560 million of guaranteed residential mortgages at December 31, 2018 and 2017 , respectively, for which there was nominal risk of principal loss due to the government guarantee. 2 For substantially all loans with refreshed FICO scores below 620, the borrower’s FICO score at the time of origination exceeded 620 but has since deteriorated as the loan has seasoned. The LHFI portfolio by payment status is presented in the following tables: December 31, 2018 Accruing (Dollars in millions) Current 30-89 Days Past Due 90+ Days Past Due Nonaccruing 1 Total Commercial loans: C&I $70,901 $64 $15 $157 $71,137 CRE 7,259 3 1 2 7,265 Commercial construction 2,538 — — — 2,538 Total commercial LHFI 80,698 67 16 159 80,940 Consumer loans: Residential mortgages - guaranteed 125 39 295 — 3 459 Residential mortgages - nonguaranteed 2 28,552 70 10 204 28,836 Residential home equity products 9,268 62 — 138 9,468 Residential construction 170 3 — 11 184 Guaranteed student 5,236 685 1,308 — 3 7,229 Other direct 10,559 45 4 7 10,615 Indirect 12,286 125 1 7 12,419 Credit cards 1,654 17 18 — 1,689 Total consumer LHFI 67,850 1,046 1,636 367 70,899 Total LHFI $148,548 $1,113 $1,652 $526 $151,839 1 Includes nonaccruing LHFI past due 90 days or more of $306 million . Nonaccruing LHFI past due fewer than 90 days include nonaccrual loans modified in TDRs, performing second lien loans where the first lien loan is nonperforming, and certain energy-related commercial loans. 2 I ncludes $163 million of loans measured at fair value, the majority of which were accruing current. 3 Guaranteed loans are not placed on nonaccrual status regardless of delinquency because collection of principal and interest is reasonably assured by the government. December 31, 2017 Accruing (Dollars in millions) Current 30-89 Days Past Due 90+ Days Past Due Nonaccruing 1 Total Commercial loans: C&I $66,092 $42 $7 $215 $66,356 CRE 5,293 — — 24 5,317 Commercial construction 3,803 — — 1 3,804 Total commercial LHFI 75,188 42 7 240 75,477 Consumer loans: Residential mortgages - guaranteed 159 55 346 — 3 560 Residential mortgages - nonguaranteed 2 26,778 148 4 206 27,136 Residential home equity products 10,348 75 — 203 10,626 Residential construction 280 7 — 11 298 Guaranteed student 4,946 659 1,028 — 3 6,633 Other direct 8,679 36 7 7 8,729 Indirect 12,022 111 — 7 12,140 Credit cards 1,556 13 13 — 1,582 Total consumer LHFI 64,768 1,104 1,398 434 67,704 Total LHFI $139,956 $1,146 $1,405 $674 $143,181 1 Includes nonaccruing LHFI past due 90 days or more of $357 million . Nonaccruing LHFI past due fewer than 90 days include nonaccrual loans modified in TDRs, performing second lien loans where the first lien loan is nonperforming, and certain energy-related commercial loans. 2 Includes $196 million of loans measured at fair value, the majority of which were accruing current. 3 Guaranteed loans are not placed on nonaccrual status regardless of delinquency because collection of principal and interest is reasonably assured by the government. Impaired Loans A loan is considered impaired when it is probable that the Company will be unable to collect all amounts due, including principal and interest, according to the contractual terms of the agreement. Commercial nonaccrual loans greater than $3 million and certain commercial and consumer loans whose terms have been modified in a TDR are individually evaluated for impairment. Smaller-balance homogeneous loans that are collectively evaluated for impairment and loans measured at fair value are not included in the following tables. Additionally, the following tables exclude guaranteed student loans and guaranteed residential mortgages for which there was nominal risk of principal loss due to the government guarantee. December 31, 2018 December 31, 2017 (Dollars in millions) Unpaid Principal Balance Carrying 1 Value Related ALLL Unpaid Principal Balance Carrying 1 Value Related ALLL Impaired LHFI with no ALLL recorded: Commercial loans: C&I $132 $79 $— $38 $35 $— CRE 10 — — — — — Total commercial LHFI with no ALLL recorded 142 79 — 38 35 — Consumer loans: Residential mortgages - nonguaranteed 501 397 — 458 363 — Residential construction 12 7 — 15 9 — Total consumer LHFI with no ALLL recorded 513 404 — 473 372 — Impaired LHFI with an ALLL recorded: Commercial loans: C&I 81 70 13 127 117 19 CRE — — — 21 21 2 Total commercial LHFI with an ALLL recorded 81 70 13 148 138 21 Consumer loans: Residential mortgages - nonguaranteed 1,006 984 96 1,133 1,103 113 Residential home equity products 849 799 44 953 895 54 Residential construction 79 76 6 93 90 7 Other direct 57 57 1 59 59 1 Indirect 133 133 5 123 122 7 Credit cards 30 9 2 26 7 1 Total consumer LHFI with an ALLL recorded 2,154 2,058 154 2,387 2,276 183 Total impaired LHFI $2,890 $2,611 $167 $3,046 $2,821 $204 1 Carrying value reflects charge-offs that have been recognized plus other amounts that have been applied to adjust the net book balance. Included in the impaired LHFI carrying values above at December 31, 2018 and 2017 were $2.3 billion and $2.4 billion of accruing TDRs, of which 97% and 96% were current, respectively. See Note 1 , “Significant Accounting Policies,” for further information regarding the Company’s loan impairment policy. Year Ended December 31 2018 2017 2016 (Dollars in millions) Average Carrying Value Interest 1 Income Recognized Average Carrying Value Interest 1 Income Recognized Average Carrying Value Interest 1 Impaired LHFI with no ALLL recorded: Commercial loans: C&I $121 $7 $34 $1 $169 $3 CRE 39 — — — — — Total commercial LHFI with no ALLL recorded 160 7 34 1 169 3 Consumer loans: Residential mortgages - nonguaranteed 404 19 357 15 370 16 Residential construction 8 1 8 — 8 — Total consumer LHFI with no ALLL recorded 412 20 365 15 378 16 Impaired LHFI with an ALLL recorded: Commercial loans: C&I 71 1 112 2 170 1 CRE — — 22 1 25 1 Total commercial LHFI with an ALLL recorded 71 1 134 3 195 2 Consumer loans: Residential mortgages - nonguaranteed 993 48 1,123 58 1,251 64 Residential home equity products 816 36 914 32 812 29 Residential construction 78 3 94 5 110 6 Other direct 58 4 60 4 10 1 Indirect 147 7 136 6 114 6 Credit cards 8 1 6 1 6 1 Total consumer LHFI with an ALLL recorded 2,100 99 2,333 106 2,303 107 Total impaired LHFI $2,743 $127 $2,866 $125 $3,045 $128 1 Of the interest income recognized during the years ended December 31, 2018, 2017, and 2016 , cash basis interest income was immaterial. NPAs are presented in the following table: (Dollars in millions) December 31, 2018 December 31, 2017 NPAs: Commercial NPLs: C&I $157 $215 CRE 2 24 Commercial construction — 1 Consumer NPLs: Residential mortgages - nonguaranteed 204 206 Residential home equity products 138 203 Residential construction 11 11 Other direct 7 7 Indirect 7 7 Total nonaccrual loans/NPLs 1 526 674 OREO 2 54 57 Other repossessed assets 9 10 Total NPAs $589 $741 1 Nonaccruing restructured loans are included in total nonaccrual loans /NPLs. 2 Does not include foreclosed real estate related to loans insured by the FHA or guaranteed by the VA . Proceeds due from the FHA and the VA are recorded as a receivable in Other assets in the Consolidated Balance Sheets until the property is conveyed and the funds are received. The receivable related to proceeds due from the FHA and the VA totaled $50 million and $45 million at December 31, 2018 and 2017 , respectively. The Company's recorded investment of nonaccruing loans secured by residential real estate properties for which formal foreclosure proceedings were in process at December 31, 2018 and 2017 was $93 million and $73 million , respectively. The Company's recorded investment of accruing loans secured by residential real estate properties for which formal foreclosure proceedings were in process at December 31, 2018 and 2017 was $110 million and $101 million , of which $103 million and $97 million were insured by the FHA or guaranteed by the VA , respectively. At December 31, 2018 , OREO included $50 million of foreclosed residential real estate properties and $2 million of foreclosed commercial real estate properties, with the remaining $2 million related to land. At December 31, 2017 , OREO included $51 million of foreclosed residential real estate properties and $4 million of foreclosed commercial real estate properties, with the remaining $2 million related to land. Restructured Loans A TDR is a loan for which the Company has granted an economic concession to a borrower in response to financial difficulty experienced by the borrower, which the Company would not have considered otherwise. When a loan is modified under the terms of a TDR, the Company typically offers the borrower an extension of the loan maturity date and/or a reduction in the original contractual interest rate. In limited situations, the Company may offer to restructure a loan in a manner that ultimately results in the forgiveness of a contractually specified principal balance. At both December 31, 2018 and 2017 , the Company had an immaterial amount of commitments to lend additional funds to debtors whose terms have been modified in a TDR. The number and carrying value of loans modified under the terms of a TDR, by type of modification, are presented in the following tables: Year Ended December 31, 2018 1 (Dollars in millions) Number of Loans Modified Rate Modification Term Extension and/or Other Concessions Total Commercial loans: C&I 169 $2 $77 $79 CRE 1 — — — Consumer loans: Residential mortgages - nonguaranteed 299 19 52 71 Residential home equity products 525 2 41 43 Residential construction 4 — — — Other direct 701 — 10 10 Indirect 2,585 — 58 58 Credit cards 1,410 5 — 5 Total TDR additions 5,694 $28 $238 $266 1 Includes loans modified under the terms of a TDR that were charged-off during the period. Year Ended December 31, 2017 1 (Dollars in millions) Number of Loans Modified Rate Modification Term Extension and/or Other Concessions Total Commercial loans: C&I 178 $3 $43 $46 Consumer loans: Residential mortgages - nonguaranteed 150 22 10 32 Residential home equity products 2,488 45 176 221 Other direct 661 — 9 9 Indirect 2,740 — 61 61 Credit cards 919 4 — 4 Total TDR additions 7,136 $74 $299 $373 1 Includes loans modified under the terms of a TDR that were charged-off during the period. Year Ended December 31, 2016 1 (Dollars in millions) Number of Loans Modified Rate Modification Term Extension and/or Other Concessions Total Commercial loans: C&I 84 $2 $68 $70 Commercial construction 1 — — — Consumer loans: Residential mortgages - nonguaranteed 397 79 12 91 Residential home equity products 2,611 9 227 236 Residential construction 1 — — — Other direct 2 3,925 — 50 50 Indirect 1,539 — 32 32 Credit cards 720 3 — 3 Total TDR additions 9,278 $93 $389 $482 1 Includes loans modified under the terms of a TDR that were charged-off during the period. 2 Includes 3,321 loans with a carrying value of $41 million that were modified prior to 2016 and reclassified as TDRs in the fourth quarter of 2016. TDRs that defaulted during the years ended December 31, 2018, 2017, and 2016 , which were first modified within the previous 12 months, were immaterial. The majority of lo ans that were modified under the terms of a TDR and subsequently became 90 days or more delinquent have remained on nonaccrual status since the time of delinquency. Concentrations of Credit Risk The Company does not have a significant concentration of credit risk to any individual client except for the U.S. government and its agencies. However, a geographic concentration arises because the majority of the Company's LHFI portfolio represents borrowers that reside in Florida, Georgia, Virginia, Maryland, and North Carolina . The Company’s cross-border outstanding loans totaled $1.8 billion and $1.4 billion at December 31, 2018 and 2017 , respectively. With respect to collateral concentration, the Company's recorded investment in residential real estate secured LHFI totaled $38.9 billion at December 31, 2018 and represented 26% of total LHFI. At December 31, 2017 , the Company's recorded investment in residential real estate secured LHFI totaled $38.6 billion and represented 27% of total LHFI. Additionally, at December 31, 2018 and 2017 , the Company had commitments to extend credit on home equity lines of $10.3 billion and $10.1 billion , and had residential mortgage commitments outstanding of $2.7 billion and $3.0 billion , respectively. At both December 31, 2018 and December 31, 2017 , 1% of the Company's LHFI secured by residential real estate was insured by the FHA or guaranteed by the VA . The following table presents loans in the residential mortgage portfolio that included a high original LTV ratio (in excess of 80%), an interest only feature, and/or a second lien position that may increase the Company's exposure to credit risk and result in a concentration of credit risk. At December 31, 2018 and December 31, 2017 , the current weighted average FICO score for the borrowers of these loans was 759 and 756 , respectively. (Dollars in millions) December 31, 2018 December 31, 2017 Interest only mortgages with MI or with combined original LTV ≤ 80% 1 $464 $569 Interest only mortgages with no MI and with combined original LTV > 80% 1 28 77 Total interest only mortgages 1 492 646 Amortizing mortgages with combined original LTV > 80% and/or second liens 2 10,922 10,197 Total mortgages with potential concentration of credit risk $11,414 $10,843 1 Comprised of first and/or second liens, primarily with an initial 10 year interest only period. 2 Comprised of loans with no MI

Allowance for Credit Losses

Allowance for Credit Losses	12 Months Ended
	Dec. 31, 2018
Allowance for Credit Losses [Abstract]
Allowance for Credit Losses	NOTE 8 - ALLOWANCE FOR CREDIT LOSSES The allowance for credit losses consists of the ALLL and the unfunded commitments reserve. Activity in the allowance for credit losses by loan segment is presented in the following tables: Year Ended December 31, 2018 (Dollars in millions) Commercial Consumer Total ALLL, beginning of period $1,101 $634 $1,735 Provision for loan losses 86 132 218 Loan charge-offs (131 ) (322 ) (453 ) Loan recoveries 24 91 115 ALLL, end of period 1,080 535 1,615 Unfunded commitments reserve, beginning of period 1 79 — 79 Benefit for unfunded commitments (10 ) — (10 ) Unfunded commitments reserve, end of period 1 69 — 69 Allowance for credit losses, end of period $1,149 $535 $1,684 1 The unfunded commitments reserve is recorded in Other liabilities in the Consolidated Balance Sheets. Year Ended December 31, 2017 (Dollars in millions) Commercial Consumer Total ALLL, beginning of period $1,124 $585 $1,709 Provision for loan losses 108 289 397 Loan charge-offs (167 ) (324 ) (491 ) Loan recoveries 40 84 124 Other 1 (4 ) — (4 ) ALLL, end of period 1,101 634 1,735 Unfunded commitments reserve, beginning of period 2 67 — 67 Provision for unfunded commitments 12 — 12 Unfunded commitments reserve, end of period 2 79 — 79 Allowance for credit losses, end of period $1,180 $634 $1,814 1 Related to loans disposed in connection with the sale of PAC . For additional information regarding the sale of PAC , see Note 3 , "Acquisitions/Dispositions." 2 The unfunded commitments reserve is recorded in Other liabilities in the Consolidated Balance Sheets. Year Ended December 31, 2016 (Dollars in millions) Commercial Consumer Total ALLL, beginning of period $1,047 $705 $1,752 Provision for loan losses 329 111 440 Loan charge-offs (287 ) (304 ) (591 ) Loan recoveries 35 73 108 ALLL, end of period 1,124 585 1,709 Unfunded commitments reserve, beginning of period 1 63 — 63 Provision for unfunded commitments 4 — 4 Unfunded commitments reserve, end of period 1 67 — 67 Allowance for credit losses, end of period $1,191 $585 $1,776 1 The unfunded commitments reserve is recorded in Other liabilities in the Consolidated Balance Sheets. As discussed in Note 1 , “Significant Accounting Policies,” the ALLL is composed of both specific allowances for certain nonaccrual loans and TDRs, and general allowances for groups of loans with similar risk characteristics. No allowance is required for loans measured at fair value. Additionally, the Company records an immaterial allowance for loan products that are insured by federal agencies or guaranteed by GSE s, as there is nominal risk of principal loss. The Company’s LHFI portfolio and related ALLL are presented in the following tables: December 31, 2018 Commercial Loans Consumer Loans Total (Dollars in millions) Carrying Value Related ALLL Carrying Value Related Carrying Value Related LHFI evaluated for impairment: Individually evaluated $149 $13 $2,462 $154 $2,611 $167 Collectively evaluated 80,791 1,067 68,274 381 149,065 1,448 Total evaluated 80,940 1,080 70,736 535 151,676 1,615 LHFI measured at fair value — — 163 — 163 — Total LHFI $80,940 $1,080 $70,899 $535 $151,839 $1,615 December 31, 2017 Commercial Loans Consumer Loans Total (Dollars in millions) Carrying Related ALLL Carrying Related Carrying Related LHFI evaluated for impairment: Individually evaluated $173 $21 $2,648 $183 $2,821 $204 Collectively evaluated 75,304 1,080 64,860 451 140,164 1,531 Total evaluated 75,477 1,101 67,508 634 142,985 1,735 LHFI measured at fair value — — 196 — 196 — Total LHFI $75,477 $1,101 $67,704 $634 $143,181 $1,735

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	NOTE 10 – GOODWILL AND OTHER INTANGIBLE ASSETS Goodwill The Company conducts a qualitative goodwill assessment at the reporting unit level at least quarterly, or more frequently as events occur or circumstances change that would more-likely-than-not reduce the fair value of a reporting unit below its carrying amount. See Note 1 , “Significant Accounting Policies,” for additional information regarding the Company’s goodwill accounting policy. The Company performed a qualitative goodwill assessment for the Consumer and Wholesale reporting units as of October 1, 2018, and concluded that a quantitative goodwill impairment test was not necessary for either reporting unit as it was not more-likely-than-not that the fair value of either reporting unit was below its respective carrying amount. The Company performed quantitative goodwill impairment tests for the Consumer and Wholesale reporting units as of October 1, 2017 and 2016. Based on the results of the impairment tests, the Company concluded that the fair values of the reporting units exceed their respective carrying amounts; therefore, there was no goodwill impairment. The Company monitored events and circumstances during the fourth quarter of 2018 and did not observe any factors that would more-likely-than-not reduce the fair value of a reporting unit below its respective carrying amount. In the second quarter of 2018, certain business banking clients were transferred from the Wholesale segment to the Consumer segment, resulting in the reallocation of $128 million in goodwill. See Note 22 , “Business Segment Reporting,” for additional information. Changes in the carrying amount of goodwill by reportable segment for the years ended December 31, 2018 and 2017 are presented in the following table. (Dollars in millions) Consumer Wholesale Total Balance, January 1, 2018 $4,262 $2,069 $6,331 Reallocation related to intersegment transfer of business banking clients 128 (128 ) — Balance, December 31, 2018 $4,390 $1,941 $6,331 Balance, January 1, 2017 $4,262 $2,075 $6,337 Measurement period adjustment related to the acquisition of Pillar — 1 1 Sale of PAC — (7 ) (7 ) Balance, December 31, 2017 $4,262 $2,069 $6,331 Other Intangible Assets Changes in the carrying amount of other intangible assets are presented in the following table: (Dollars in millions) Residential MSRs - Fair Value Commercial Mortgage Servicing Rights and Other Total Balance, January 1, 2018 $1,710 $81 $1,791 Amortization 1 — (18 ) (18 ) Servicing rights originated 336 16 352 Servicing rights purchased 89 — 89 Changes in fair value: Due to changes in inputs and assumptions 2 90 — 90 Other changes in fair value 3 (239 ) — (239 ) Servicing rights sold (3 ) — (3 ) Balance, December 31, 2018 $1,983 $79 $2,062 Balance, January 1, 2017 $1,572 $85 $1,657 Amortization 1 — (20 ) (20 ) Servicing rights originated 394 17 411 Changes in fair value: Due to changes in inputs and assumptions 2 (22 ) — (22 ) Other changes in fair value 3 (226 ) — (226 ) Servicing rights sold (8 ) — (8 ) Other 4 — (1 ) (1 ) Balance, December 31, 2017 $1,710 $81 $1,791 1 Does not include expense associated with community development investments. See Note 12 , “Certain Transfers of Financial Assets and Variable Interest Entities,” for additional information. 2 Primarily reflects changes in option adjusted spreads and prepayment speed assumptions, due to changes in interest rates. 3 Represents changes due to the collection of expected cash flows, net of accretion due to the passage of time. 4 Represents measurement period adjustment on other intangible assets acquired previously in the Pillar acquisition. The gross carrying value and accumulated amortization of other intangible assets are presented in the following table: December 31, 2018 December 31, 2017 (Dollars in millions) Gross Carrying Value Accumulated Amortization Net Carrying Value Gross Carrying Value Accumulated Amortization Net Carrying Value Amortized other intangible assets 1 : Commercial mortgage servicing rights $95 ($29 ) $66 $79 ($14 ) $65 Other 6 (5 ) 1 32 (28 ) 4 Unamortized other intangible assets: Residential MSRs 1,983 — 1,983 1,710 — 1,710 Other 12 — 12 12 — 12 Total other intangible assets $2,096 ($34 ) $2,062 $1,833 ($42 ) $1,791 1 Excludes other intangible assets that are indefinite-lived, carried at fair value, or fully amortized. The Company’s estimated future amortization of intangible assets at December 31, 2018 is presented in the following table: (Dollars in millions) 2019 $10 2020 8 2021 7 2022 6 2023 5 Thereafter 31 Total 1 $67 1 Does not include indefinite-lived intangible assets of $12 million . Servicing Rights The Company acquires servicing rights and retains servicing rights for certain of its sales or securitizations of residential mortgages and commercial loans. Servicing rights on residential and commercial mortgages are capitalized by the Company and are classified as Other intangible assets on the Company's Consolidated Balance Sheets. Residential Mortgage Servicing Rights Income earned by the Company on its residential MSRs is derived primarily from contractually specified mortgage servicing fees and late fees, net of curtailment costs, and is presented in the following table. Year Ended December 31 (Dollars in millions) 2018 2017 2016 Income from residential MSRs 1 $437 $403 $366 1 Recognized in Mortgage related income in the Consolidated Statements of Income. The UPB of residential mortgage loans serviced for third parties is presented in the following table: (Dollars in millions) December 31, 2018 December 31, 2017 UPB of loans underlying residential MSRs $140,801 $136,071 The Company purchased MSRs on residential loans with a UPB of $7.0 billion during the year ended December 31, 2018 . No MSRs on residential loans were purchased during the year ended December 31, 2017 . During both years ended December 31, 2018 and 2017 , the Company sold MSRs on residential loans, at a price approximating their fair value, with a UPB of $1.1 billion . The Company measures the fair value of its residential MSRs using a valuation model that calculates the present value of estimated future net servicing income using prepayment projections, spreads, and other assumptions. The Consumer Valuation Committee reviews and approves all significant assumption changes at least annually, drawing upon various market and empirical data sources. Changes to valuation model inputs are reflected in the periods’ results. See Note 20 , “Fair Value Election and Measurement,” for further information regarding the Company’s residential MSR valuation methodology. A summary of the significant unobservable inputs used to estimate the fair value of the Company’s residential MSRs and the uncertainty of the fair values in response to 10% and 20% adverse changes in those inputs at the reporting date, are presented in the following table. (Dollars in millions) December 31, 2018 December 31, 2017 Fair value of residential MSRs $1,983 $1,710 Prepayment rate assumption (annual) 13 % 13 % Decline in fair value from 10% adverse change $96 $85 Decline in fair value from 20% adverse change 183 160 Option adjusted spread (annual) 2 % 4 % Decline in fair value from 10% adverse change $44 $47 Decline in fair value from 20% adverse change 86 90 Weighted-average life (in years) 5.5 5.4 Weighted-average coupon 4.0 % 3.9 % Residential MSR uncertainties are hypothetical and should be used with caution. Changes in fair value based on variations in assumptions generally cannot be extrapolated because (i) the relationship of the change in an assumption to the change in fair value may not be linear and (ii) changes in one assumption may result in changes in another, which might magnify or counteract the uncertainties. The uncertainties do not reflect the effect of hedging activity undertaken by the Company to offset changes in the fair value of MSRs. See Note 19 , “Derivative Financial Instruments,” for further information regarding these hedging activities. Commercial Mortgage Servicing Rights Income earned by the Company on its commercial mortgage servicing rights is derived primarily from contractually specified servicing fees and other ancillary fees. The Company also earns income from subservicing certain third party commercial mortgages for which the Company does not record servicing rights. The following table presents the Company’s income earned from servicing commercial mortgages. Year Ended December 31 (Dollars in millions) 2018 2017 2016 Income from commercial mortgage servicing rights 1 $26 $22 $1 Income from subservicing third party commercial mortgages 1 13 14 1 1 Recognized in Commercial real estate related income in the Consolidated Statements of Income. The UPB of commercial mortgage loans serviced for third parties is presented in the following table: (Dollars in millions) December 31, 2018 December 31, 2017 UPB of commercial mortgages subserviced for third parties $28,140 $24,294 UPB of loans underlying commercial mortgage servicing rights 6,399 5,760 Total UPB of commercial mortgages serviced for third parties $34,539 $30,054 No commercial mortgage servicing rights were purchased or sold during the years ended December 31, 2018 and 2017 . Commercial mortgage servicing rights are accounted for at amortized cost and are monitored for impairment on an ongoing basis. The Company calculates the fair value of commercial servicing rights based on the present value of estimated future net servicing income, considering prepayment projections and other assumptions. Impairment, if any, is recognized when the carrying value of the servicing asset exceeds the fair value at the measurement date. The amortized cost of the Company’s commercial mortgage servicing rights was $66 million and $65 million at December 31, 2018 and December 31, 2017 , respectively. A summary of the significant unobservable inputs used to estimate the fair value of the Company’s commercial mortgage servicing rights and the uncertainty of the fair values in response to 10% and 20% adverse changes in those inputs at the reporting date, are presented in the following table. (Dollars in millions) December 31, 2018 December 31, 2017 Fair value of commercial mortgage servicing rights $77 $75 Discount rate (annual) 12 % 12 % Decline in fair value from 10% adverse change $3 $3 Decline in fair value from 20% adverse change 6 6 Prepayment rate assumption (annual) 5 % 7 % Decline in fair value from 10% adverse change $1 $1 Decline in fair value from 20% adverse change 2 2 Weighted-average life (in years) 8.1 7.0 Float earnings rate (annual) 1.1 % 1.1 %

Premises, Property, and Equipme

Premises, Property, and Equipment Property Plant And Equipment (Notes)	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment Disclosure [Text Block]	NOTE 9 - PREMISES, PROPERTY, AND EQUIPMENT Premises, property, and equipment at December 31 consisted of the following: (Dollars in millions) Useful Life (in years) 2018 2017 Land Indefinite $310 $321 Buildings and improvements 1 - 50 1,059 1,047 Leasehold improvements 1 - 30 758 691 Furniture and equipment 1 - 20 1,429 1,430 Software 1 1 - 5 1,890 1,671 Construction and software in progress 351 488 Total premises, property, and equipment 5,797 5,648 Less: Accumulated depreciation and amortization 3,773 3,595 Premises, property, and equipment, net $2,024 $2,053 1 Beginning October 1, 2018, the Company reclassified capitalized software and related accumulated amortization previously presented in Other assets to Premises, property, and equipment, net, on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability. None of the Company's premises, property, and equipment was subject to mortgage indebtedness at December 31, 2018 and 2017 . Capital leases included in net premises, property, and equipment was immaterial at both December 31, 2018 and 2017 . Aggregate rent expense (principally for offices), including any contingent rent expense and sublease income, totaled $179 million , $201 million , and $202 million for the years ended December 31, 2018, 2017, and 2016 , respectively. Depreciation and amortization expense on premises, property, and equipment for the years ended December 31, 2018, 2017, and 2016 totaled $333 million , $299 million , and $290 million , respectively. See Note 1 , “Significant Accounting Policies,” for the Company's accounting policies regarding premises, property, and equipment and related depreciation and amortization. The Company previously completed sale-leaseback transactions consisting of branch properties and various individual office buildings. Upon completion of these transactions, the Company recognized a portion of the resulting gains and deferred the remainder to be recognized ratably over the expected term of the lease, predominantly 10 years, as an offset to Net occupancy expense on the Consolidated Statements of Income. Amortization of deferred gains on sale-leaseback transactions totaled $6 million , $17 million , and $43 million for the years ended December 31, 2018, 2017, and 2016 , respectively. At December 31, 2018 and 2017 , the remaining deferred gain associated with sale-leaseback transactions was $42 million and $49 million , respectively. In connection with the Company's January 1, 2019 adoption of ASC Topic 842, Leases , the remaining deferred gain on sale-leaseback transactions was recognized in retained earnings through a cumulative effect adjustment. See Note 1 , “Significant Accounting Policies,” for additional information. The Company has various obligations under noncancelable operating leases for premises, property, and equipment. The leases predominantly expire over the next 20 years, with the longest lease term having an expiration date in 2081 . Many of these leases include a renewal option and some provide for periodic adjustment of rentals based on changes in various economic indicators. The following table presents future minimum payments under noncancelable operating leases with initial terms in excess of one year at December 31, 2018 : (Dollars in millions) Operating Leases 2019 $204 2020 195 2021 186 2022 171 2023 148 Thereafter 585 Total minimum lease payments $1,489

Other Assets (Notes)

Other Assets (Notes)	12 Months Ended
	Dec. 31, 2018
Other Assets Disclosure [Abstract]
Other Assets Disclosure [Text Block]	NOTE 11 - OTHER ASSETS The components of other assets are presented in the following table: (Dollars in millions) December 31, 2018 December 31, 2017 Equity securities 1 : Marketable equity securities 2 : Mutual fund investments $79 $49 Other equity 3 16 7 Nonmarketable equity securities: Federal Reserve Bank stock 2 403 403 FHLB stock 2 227 15 Other equity 3 68 26 Lease assets 1,940 1,528 Tax credit investments 4 1,722 1,272 Bank-owned life insurance 1,627 1,411 Accrued income 1,106 880 Accounts receivable 602 2,201 Pension assets, net 484 464 Prepaid expenses 231 319 OREO 54 57 Other 5 432 467 Total other assets $8,991 $9,099 1 Does not include equity securities held for trading purposes classified as Trading assets and derivative instruments or Trading liabilities and derivative instruments on the Company’s Consolidated Balance Sheets. See Note 5 , “Trading Assets and Liabilities and Derivative Instruments,” for more information. 2 Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability . 3 During the second quarter of 2018, the Company reclassified $22 million of equity securities from nonmarketable to marketable equity securities due to readily determinable fair value information observed in active markets. 4 See Note 12 , “Certain Transfers of Financial Assets and Variable Interest Entities,” for additional information. 5 Beginning October 1, 2018, the Company reclassified capitalized software and related accumulated amortization previously presented in Other assets to Premises, property, and equipment, net, on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability. Equity Securities Not Classified as Trading Assets or Liabilities Equity securities with readily determinable fair values (marketable) that are not held for trading purposes are recorded at fair value and include mutual fund investments and other publicly traded equity securities. Equity securities without readily determinable fair values (nonmarketable) that are not held for trading purposes include Federal Reserve Bank of Atlanta and FHLB of Atlanta capital stock, both held at cost, as well as other equity securities that the Company elected to account for under the measurement alternative, pursuant to the adoption of ASU 2016-01 on January 1, 2018. See the “ Equity Securities ” and “ Accounting Pronouncements ” sections of Note 1 , “Significant Accounting Policies,” for additional information on the Company’s adoption of ASU 2016-01 and for the Company's accounting policy related to equity securities. The following table summarizes net gains/(losses) for equity securities not classified as trading assets: (Dollars in millions) Year Ended December 31, 2018 Net (losses)/gains from marketable equity securities 1 ($2 ) Net gains/(losses) from nonmarketable equity securities: Remeasurement losses and impairment — Remeasurement gains 1 30 Less: Net realized gains from sale — Total net unrealized gains from non-trading equity securities $28 1 Recognized in Other noninterest income in the Company's Consolidated Statements of Income. Lease Assets Lease assets consist primarily of operating leases in which the Company is the lessor. In these scenarios, the Company leases assets and receives periodic rental payments. Depreciation on the leased asset is recognized over the term of the operating lease. Any impairment on the leased asset is recognized to the extent that the carrying value of the asset is not recoverable and is greater than its fair value. Bank-Owned Life Insurance Bank-owned life insurance consists of life insurance policies held on certain employees for which the Company is the beneficiary. These policies provide the Company an efficient form of funding for retirement and other employee benefits costs. Accrued Income Accrued income consists primarily of interest and other income accrued on the Company’s LHFI. Interest income on loans, except those classified as nonaccrual, is accrued based upon the outstanding principal amounts using the effective yield method. See Note 1 , “Significant Accounting Policies,” for information regarding the Company’s accounting policy for loans. Accounts Receivable Accounts receivable consists primarily of receivables from brokers, dealers, and customers related to pending loan trades, unsettled trades of securities, loan-related advances, and investment securities income due but not received. Accounts receivable also includes proceeds due from the FHA and the VA on foreclosed real estate related to loans that are insured by the FHA or guaranteed by the VA . Pension Assets

Certain Transfers of Financial

Certain Transfers of Financial Assets and Variable Interest Entities	12 Months Ended
	Dec. 31, 2018
Certain Transfers of Financial Assets and Variable Interest Entities [Abstract]
Transfers and Servicing of Financial Assets [Text Block]	NOTE 12 - CERTAIN TRANSFERS OF FINANCIAL ASSETS AND VARIABLE INTEREST ENTITIES The Company has transferred loans and securities in sale or securitization transactions for which the Company retains certain beneficial interests, servicing rights, and/or recourse. These transfers of financial assets include certain residential mortgage loans, guaranteed student loans, and commercial loans, as discussed in the following section, "Transfers of Financial Assets." Cash receipts on beneficial interests held related to these transfers totaled $2 million , $11 million , and $12 million for the years ended December 31, 2018, 2017, and 2016 , respectively. When a transfer or other transaction occurs with a VIE, the Company first determines whether it has a VI in the VIE. A VI is typically in the form of securities representing retained interests in transferred assets and, at times, servicing rights, and for commercial mortgage loans sold to Fannie Mae , the loss share guarantee. See Note 18 , “Guarantees,” for further discussion of the Company's loss share guarantee. When determining whether to consolidate the VIE, the Company evaluates whether it is a primary beneficiary which has both (i) the power to direct the activities that most significantly impact the economic performance of the VIE, and (ii) the obligation to absorb losses, or the right to receive benefits, that could potentially be significant to the VIE . To determine whether a transfer should be accounted for as a sale or a secured borrowing, the Company evaluates whether: (i) the transferred assets are legally isolated, (ii) the transferee has the right to pledge or exchange the transferred assets, and (iii) the Company has relinquished effective control of the transferred assets. If all three conditions are met, then the transfer is accounted for as a sale. Except as specifically noted herein, the Company is not required to provide additional financial support to any of the entities to which the Company has transferred financial assets, nor has the Company provided any support it was not otherwise obligated to provide. No events occurred during the year ended December 31, 2018 that changed the Company’s previous conclusions regarding whether it is the primary beneficiary of the VIEs described herein. Furthermore, no events occurred during the year ended December 31, 2018 that changed the Company’s sale conclusion with regards to previously transferred residential mortgage loans, guaranteed student loans, or commercial loans. Transfers of Financial Assets The following discussion summarizes transfers of financial assets to entities for which the Company has retained some level of continuing involvement. Consumer Loans Residential Mortgage Loans The Company typically transfers first lien residential mortgage loans in conjunction with Ginnie Mae , Fannie Mae , and Freddie Mac securitization transactions, whereby the loans are exchanged for cash or securities that are readily redeemable for cash, and servicing rights are retained. The Company sold residential mortgage loans to Ginnie Mae , Fannie Mae , and Freddie Mac , which resulted in pre-tax net gains of $64 million , $213 million , and $331 million for the years ended December 31, 2018, 2017, and 2016 , respectively. Net gains/losses on the sale of residential mortgage LHFS are recorded at inception of the associated IRLCs and reflect the change in value of the loans resulting from changes in interest rates from the time the Company enters into the related IRLCs with borrowers until the loans are sold, but do not include the results of hedging activities initiated by the Company to mitigate this market risk. See Note 19 , "Derivative Financial Instruments," for further discussion of the Company's hedging activities. The Company has made certain representations and warranties with respect to the transfer of these loans. See Note 18 , “Guarantees,” for additional information regarding representations and warranties. In a limited number of securitizations, the Company has received securities in addition to cash in exchange for the transferred loans, while also retaining servicing rights. The securities received are measured at fair value and classified as securities AFS. During the second quarter of 2018, the Company sold the majority of these securities for a net gain of $6 million , recognized in Net securities gains/(losses) on the Consolidated Statements of Income for the year ended December 31, 2018 . The fair value of retained securities was immaterial at December 31, 2018 and totaled $22 million at December 31, 2017 . The Company evaluates securitization entities in which it has a VI for potential consolidation under the VIE consolidation model. Notwithstanding the Company's role as servicer, the Company typically does not have power over the securitization entities as a result of rights held by the master servicer. In certain transactions, the Company does have power as the servicer, but does not have an obligation to absorb losses, or the right to receive benefits, that could potentially be significant. In all such cases, the Company does not consolidate the securitization entity. Assets of the unconsolidated entities in which the Company has a VI totaled $147 million at December 31, 2017 . The Company’s maximum exposure to loss related to these unconsolidated residential mortgage loan securitizations is comprised of the loss of value of any interests it retains, which was immaterial at December 31, 2018 and totaled $22 million at December 31, 2017 , as well as any repurchase obligations or other losses it incurs as a result of any guarantees related to these securitizations, which is discussed further in Note 18 , “Guarantees.” Guaranteed Student Loans The Company has securitized government-guaranteed student loans through a transfer of loans to a securitization entity and retained the residual interest in the entity. The Company concluded that this entity should be consolidated because the Company has (i) the power to direct the activities that most significantly impact the economic performance of the VIE and (ii) the obligation to absorb losses, and the right to receive benefits, that could potentially be significant. At December 31, 2018 and 2017 , the Company’s Consolidated Balance Sheets reflected $165 million and $192 million of assets held by the securitization entity and $161 million and $189 million of debt issued by the entity, respectively, inclusive of related accrued interest. To the extent that the securitization entity incurs losses on its assets, the securitization entity has recourse to the guarantor of the underlying loan, which is backed by the Department of Education up to a maximum guarantee of 98% , or in the event of death, disability, or bankruptcy, 100% . When not fully guaranteed, losses reduce the amount of available cash payable to the Company as the owner of the residual interest. To the extent that losses result from a breach of servicing responsibilities, the Company, which functions as the master servicer, may be required to repurchase the defaulted loan(s) at par value. If the breach was caused by the subservicer, the Company would seek reimbursement from the subservicer up to the guaranteed amount. The Company’s maximum exposure to loss related to the securitization entity would arise from a breach of its servicing responsibilities. To date, loss claims filed with the guarantor that have been denied due to servicing errors have either been, or are in the process of being cured, or reimbursement has been provided to the Company by the subservicer, or in limited cases, absorbed by the Company. Commercial Loans The Company originates and sells certain commercial mortgage loans to Fannie Mae and Freddie Mac , originates FHA insured loans, and issues and sells Ginnie Mae commercial MBS secured by FHA insured loans. The Company transferred commercial loans to these Agencies and GSE s, which resulted in pre-tax net gains of $35 million and $37 million for the years ended December 31, 2018 and 2017 , respectively. No associated gains or losses were recognized for the year ended December 31, 2016. The loans are exchanged for cash or securities that are readily redeemable for cash, with servicing rights retained. The Company has made certain representations and warranties with respect to the transfer of these loans and has entered into a loss share guarantee related to certain loans transferred to Fannie Mae . See Note 18 , “Guarantees,” for additional information regarding the commercial mortgage loan loss share guarantee. The Company's total managed loans, including the LHFI portfolio and other transferred loans (securitized and unsecuritized), are presented in the following table by portfolio balance and delinquency status (accruing loans 90 days or more past due and all nonaccrual loans) at December 31, 2018 and 2017 , as well as the related net charge-offs for the years ended December 31, 2018 and 2017 . Portfolio Balance Past Due and Nonaccrual Net Charge-offs December 31, 2018 December 31, 2017 December 31, 2018 December 31, 2017 Year Ended December 31 (Dollars in millions) 2018 2017 LHFI portfolio: Commercial $80,940 $75,477 $175 $247 $107 $127 Consumer 70,899 67,704 2,003 1,832 231 240 Total LHFI portfolio 151,839 143,181 2,178 2,079 338 367 Managed securitized loans: Commercial 1 6,399 5,760 — — — — Consumer 139,809 134,160 146 171 5 2 8 2 Total managed securitized loans 146,208 139,920 146 171 5 8 Managed unsecuritized loans 3 1,134 2,200 152 340 — — Total managed loans $299,181 $285,301 $2,476 $2,590 $343 $375 1 Comprised of commercial mortgages sold through Fannie Mae , Freddie Mac , and Ginnie Mae securitizations, whereby servicing has been retained by the Company. 2 Amounts associated with $387 million and $602 million of managed securitized loans at December 31, 2018 and 2017 , respectively. Net charge-off data is not reported to the Company for the remaining balance of $139.4 billion and $133.6 billion of managed securitized loans at December 31, 2018 and 2017 , respectively. 3 Comprised of unsecuritized loans the Company originated and sold to private investors with servicing rights retained. Net charge-offs on these loans are not presented in the table as the data is not reported to the Company by the private investors that own these related loans. Other Variable Interest Entities In addition to exposure to VIEs arising from transfers of financial assets, the Company also has involvement with VIEs from other business activities. Tax Credit Investments The following table provides information related to the Company's investments in tax credit VIEs that it does not consolidate: Community Development Investments Renewable Energy Partnerships (Dollars in millions) December 31, 2018 December 31, 2017 December 31, 2018 December 31, 2017 Carrying value of investments 1 $1,636 $1,272 $86 $— Maximum exposure to loss related to investments 2 2,207 1,905 138 — 1 At December 31, 2018 and 2017 , the carrying value of community development investments excludes $68 million and $59 million of investments in funds that do not qualify for tax credits, respectively. 2 At December 31, 2018 and 2017 , the Company's maximum exposure to loss related to community development investments includes $422 million and $354 million of loans and $639 million and $627 million of unfunded equity commitments, respectively. At December 31, 2018 , the Company's maximum exposure to loss related to renewable energy partnerships includes $52 million of unfunded equity commitments. Community Development Investments The Company invests in multi-family affordable housing partnership developments and other community development entities as a limited partner and/or a lender. The carrying value of these investments is recorded in Other assets on the Company’s Consolidated Balance Sheets. The Company receives tax credits for its limited partner investments, which are recorded in Provision for income taxes in the Company's Consolidated Statements of Income. Amortization recognized on qualified affordable housing partnerships is recorded in the Provision for income taxes, net of the related tax benefits, in the Company's Consolidated Statements of Income. Amortization recognized on other community development investments is recorded in Amortization in the Company's Consolidated Statements of Income. The Company has determined that the majority of the related partnerships are VIEs. The Company has concluded that it is not the primary beneficiary of these investments when it invests as a limited partner and there is a third party general partner. The general partner, or an affiliate of the general partner, often provides guarantees to the limited partner, which protects the Company from construction and operating losses and tax credit allocation deficits. The Company’s maximum exposure to loss would result from the loss of its limited partner investments, net of liabilities, along with loans or interest rate swap exposures related to these investments as well as unfunded equity commitments that the Company is required to fund if certain conditions are met. The following table presents tax credits and amortization associated with the Company’s investments in community development investments: Tax Credits Amortization Year Ended December 31 Year Ended December 31 (Dollars in millions) 2018 2017 2016 2018 2017 2016 Qualified affordable housing partnerships $121 $108 $92 $127 $109 $87 Other community development investments 89 90 64 71 70 46 Renewable Energy Partnerships In the second quarter of 2018, the Company began investing in entities that promote renewable energy sources as a limited partner. The carrying value of these renewable energy partnership investments is recorded in Other assets on the Company’s Consolidated Balance Sheets, and the associated tax credits received for these investments are recorded as a reduction to the carrying value of these investments. The Company has determined that these renewable energy tax credit partnerships are VIEs. The Company has concluded that it is not the primary beneficiary of these VIEs because it does not have the power to direct the activities that most significantly impact the VIEs' financial performance and therefore, it is not required to consolidate these VIEs. The Company’s maximum exposure to loss related to these investments is comprised of its equity investments in these partnerships and any additional unfunded equity commitments. Total Return Swaps The Company facilitates matched book TRS transactions on behalf of clients, whereby a VIE purchases reference assets identified by a client and the Company enters into a TRS with the VIE, with a mirror-image TRS facing the client. The TRS contract between the VIE and the Company hedges the Company's exposure to the TRS contract with its third party client. The Company provides senior financing to the VIE, in the form of demand notes to fund the purchase of the reference assets. The TRS contracts pass through interest and other cash flows on the reference assets to the third party clients, along with exposing those clients to decreases in value on the assets and providing them with the rights to appreciation on the assets. The terms of the TRS contracts require the third parties to post initial margin collateral, in addition to ongoing margin as the fair values of the underlying reference assets change. The Company evaluated the related VIEs for consolidation, noting that the Company and its third party clients are VI holders. The Company evaluated the nature of all VI s and other interests and involvement with the VIEs, in addition to the purpose and design of the VIEs, relative to the risks they were designed to create. The VIEs were designed for the benefit of the third parties and would not exist if the Company did not enter into the TRS contracts on their behalf. The activities of the VIEs are restricted to buying and selling the reference assets and the risks/benefits of any such assets owned by the VIEs are passed to the third party clients via the TRS contracts. The Company determined that it is not the primary beneficiary of the VIEs, as the design of its matched book TRS business results in the Company having no substantive power to direct the significant activities of the VIEs, and therefore, the VIEs are not consolidated. At December 31, 2018 and 2017 , the outstanding notional amount of the Company's VIE-facing TRS contracts totaled $2.0 billion and $1.7 billion , and related loans outstanding to VIEs totaled $2.0 billion and $1.7 billion , respectively. These financings were measured at fair value and classified within Trading assets and derivative instruments on the Consolidated Balance Sheets. The Company entered into client-facing TRS contracts of the same outstanding notional amounts. The notional amounts of the TRS contracts with VIEs represent the Company’s maximum exposure to loss, although this exposure has been mitigated via the TRS contracts with clients. For additional information on the Company’s TRS contracts and its involvement with these VIEs, see Note 19

Borrowings and Contractual Comm

Borrowings and Contractual Commitments (Notes)	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Debt Disclosure [Text Block]	NOTE 13 - BORROWINGS AND CONTRACTUAL COMMITMENTS Short-term Borrowings Short-term borrowings at December 31 consisted of the following: 2018 2017 (Dollars in millions) Balance Interest Rate Balance Interest Rate Funds purchased $2,141 2.40 % $2,561 1.33 % Securities sold under agreements to repurchase 1,774 2.58 1,503 1.39 Other short-term borrowings: FHLB advances 4,000 2.53 — Dealer collateral 503 2.40 367 1.33 Master notes 354 1.40 350 0.66 Total other short-term borrowings 4,857 2.44 717 1.00 Total short-term borrowings $8,772 2.46 % $4,781 1.30 % Long-term Debt Long-term debt at December 31 consisted of the following: 2018 2017 (Dollars in millions) Maturity Date(s) Interest Rate(s) Balance Balance Parent Company: Senior, fixed rate 2019 - 2028 2.50% - 6.00% $3,467 $3,353 Senior, floating rate 2019 2.69 51 51 Subordinated, fixed rate 2026 6.00 200 200 Junior subordinated, floating rate 2027 - 2028 3.29 - 3.44 627 628 Structured notes 1 2019 - 2026 200 242 Total 4,545 4,474 Less: Debt issuance costs 9 8 Total Parent Company debt 4,536 4,466 Subsidiaries 2 : Senior, fixed rate 3 2019 - 2058 0.69 - 9.55 6,238 3,609 Senior, floating rate 2020 - 2043 1.04 - 3.15 1,085 512 Senior, fixed-to-floating rate 2021 - 2024 2.59 - 3.69 2,364 — Subordinated, fixed rate 2020 - 2026 3.30 - 5.40 864 1,206 Total 10,551 5,327 Less: Debt issuance costs 15 8 Total subsidiaries debt 10,536 5,319 Total long-term debt 4 $15,072 $9,785 1 Consists of notes with various terms that include fixed or floating interest, or returns that are linked to an equity index. 2 82% and 77% of total subsidiary debt was issued by the Bank as of December 31, 2018 and 2017 , respectively. 3 Includes leases and other obligations that do not have a stated interest rate. 4 Includes $289 million and $530 million of long-term debt measured at fair value at December 31, 2018 and 2017 , respectively. The Company had no foreign denominated debt outstanding at December 31, 2018 or 2017 . Maturities of long-term debt at December 31, 2018 were as follows: (Dollars in millions) Parent Company Subsidiaries 2019 $792 $1,026 2020 — 1,496 2021 1,039 1,652 2022 984 1,800 2023 12 1,095 Thereafter 1,718 3,482 Total maturities 4,545 10,551 Less: Debt issuance costs 9 15 Total long-term debt $4,536 $10,536 The Company’s issuances of long-term debt during 2018 are summarized in the following table: 2018 Debt Issuances Principal Amount (Dollars in millions) Parent Company: 7-year fixed rate senior notes $850 Subsidiaries: 3-year fixed-to-floating rate senior notes 750 3-year fixed-to-floating rate senior notes 600 7-year fixed rate senior notes 500 6-year fixed-to-floating rate senior notes 500 5-year fixed rate senior notes 500 4-year fixed-to-floating rate senior notes 500 4-year floating rate senior notes 300 3-year floating rate senior notes 300 Total $4,800 In addition to the long-term debt issuances presented above, outstanding FHLB advances increased $1.0 billion , direct finance leases increased $530 million , senior note maturities totaled $750 million , and subordinated note maturities totaled $314 million during 2018 . The Company had no additional material issuances, advances, repurchases, terminations, or extinguishments of long-term debt during the year. Restrictive provisions of several long-term debt agreements prevent the Company from creating liens on, disposing of, or issuing (except to related parties) voting stock of subsidiaries. Furthermore, there are restrictions on mergers, consolidations, certain leases, sales or transfers of assets, minimum shareholders’ equity, and maximum borrowings by the Company. At December 31, 2018 , the Company was in compliance with all covenants and provisions of long-term debt agreements. As currently defined by federal bank regulators, long-term debt of $1.5 billion and $1.6 billion qualified as Tier 2 capital at December 31, 2018 and 2017 , respectively. See Note 15 , “Capital,” for additional information regarding regulatory capital adequacy requirements for the Company and the Bank. The Company does not consolidate certain wholly-owned trusts which were formed for the sole purpose of issuing trust preferred securities. The proceeds from the trust preferred securities issuances were invested in junior subordinated debentures of the Parent Company. The obligations of these debentures constitute a full and unconditional guarantee by the Parent Company of the trust preferred securities. Contractual Commitments In the normal course of business, the Company enters into certain contractual commitments. These commitments include obligations to make future payments on the Company’s borrowings, partnership investments, and lease arrangements, as well as commitments to lend to clients and to fund capital expenditures and service contracts. The following table presents the Company’s significant contractual commitments at December 31, 2018 , except for long-term debt and short-term borrowings (presented in this Note above), operating leases (disclosed in Note 9 , “Premises, Property, and Equipment”), UTB s (disclosed in Note 16 , “Income Taxes”), and pension and other postretirement benefit plans (disclosed in Note 17 , “Employee Benefit Plans”). Capital lease obligations were immaterial at December 31, 2018 and are not presented in the table. Payments Due by Period at December 31, 2018 (Dollars in millions) 2019 2020 2021 2022 2023 Thereafter Total Unfunded lending commitments $26,122 $8,670 $11,495 $14,678 $22,421 $12,538 $95,924 Consumer and other time deposits 1, 2 7,781 3,262 758 918 363 2,273 15,355 Brokered time deposits 1 168 238 241 194 152 52 1,045 Purchase obligations 3 249 234 63 64 58 244 912 Commitments to fund tax credit investments 4 702 — — — — — 702 1 Amounts do not include interest. 2 The aggregate amount of time deposit accounts in denominations of $250,000 or more was $4.5 billion and $3.2 billion at December 31, 2018 and 2017 , respectively. 3 For legally binding purchase obligations of $5 million or more, amounts include either termination fees under the associated contracts when early termination provisions exist, or the total potential obligation over the full contractual term for noncancelable purchase obligations. Payments made towards the purchase of goods or services under these contracts totaled $499 million , $395 million , and $236 million in 2018, 2017, and 2016 , respectively. 4 Commitments to fund investments in affordable housing and other partnerships do not have defined funding dates as certain criteria must be met before the Company is obligated to fund. Accordingly, these commitments are considered to be due on demand for presentation purposes. See Note 12

Net Income Per Common Share

Net Income Per Common Share	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Net Income/(Loss) Per Share	NOTE 14 – NET INCOME PER COMMON SHARE Reconciliations of net income to net income available to common shareholders and average basic common shares outstanding to average diluted common shares outstanding are presented in the following table. Equivalent shares of 1 million related to common stock options and warrants outstanding at December 31, 2016 were excluded from the computation of diluted net income per average common share because they would have been anti-dilutive. Year Ended December 31 (Dollars and shares in millions, except per share data) 2018 2017 2016 Net income $2,775 $2,273 $1,878 Less: Preferred stock dividends (107 ) (94 ) (66 ) Dividends and undistributed earnings allocated to unvested common share awards — — (1 ) Net income available to common shareholders $2,668 $2,179 $1,811 Average common shares outstanding - basic 460.9 481.3 498.6 Add dilutive securities: RSUs 2.9 3.0 2.9 Common stock warrants, options, and restricted stock 1.2 2.7 2.0 Average common shares outstanding - diluted 465.0 487.0 503.5 Net income per average common share - diluted $5.74 $4.47 $3.60 Net income per average common share - basic 5.79 4.53 3.63

Capital

Capital	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Regulatory Capital Requirements under Banking Regulations [Text Block]	NOTE 15 – CAPITAL During 2018 , pursuant to the Federal Reserve’s non-objection to the Company’s capital plan in conjunction with the 2018 CCAR , the Company increased its quarterly common stock dividend from $0.40 to $0.50 per share beginning in the third quarter of 2018 , maintained dividend payments on its preferred stock, and repurchased $1.25 billion of its outstanding common stock at market value (approximately 18.9 million shares) under the 2018 capital plan. During the first half of 2018 , the Company repurchased $660 million of its outstanding common stock, which completed its authorized repurchase of common equity under the 2017 CCAR capital plan, which effectively expired on June 30, 2018. At December 31, 2018 , the Company had remaining capacity under its 2018 capital plan to repurchase an additional $750 million of its outstanding common stock through June 30, 2019. Dividends declared on the Company’s common and preferred stock were as follows: Year Ended December 31 (Dollars in millions, except per share data) 2018 2017 2016 Common stock: Dividends declared $826 $634 $498 Dividends declared per share 1.80 1.32 1.00 Preferred stock: Dividends declared $107 $94 $66 Dividends declared per share: Series A 4,056 4,056 4,067 Series B 4,056 4,056 4,067 Series E 1 1,469 5,875 5,875 Series F 5,625 5,625 5,625 Series G 5,050 3,128 — Series H 5,566 669 — 1 All 4,500 shares of outstanding Series E Preferred Stock were redeemed in the first quarter of 2018. Substantially all of the Company’s retained earnings are undistributed earnings of the Bank, which are restricted by various regulations administered by federal and state bank regulatory authorities. At December 31, 2018 and 2017 , retained earnings of the Bank available for payment of cash dividends to the Parent Company under these regulations totaled approximately $2.2 billion and $2.5 billion , respectively. Additionally, the FRB requires the Company to maintain cash or deposit reserves with the Federal Reserve Bank. For the years ended December 31, 2018 and 2017 , the average required reserve balance was $1.3 billion and $1.2 billion , respectively, which was fulfilled with a combination of cash on hand and deposits at the Federal Reserve. Regulatory Capital The Company is subject to the following minimum capital requirements: CET1 ratio of 4.5% ; Tier 1 capital ratio of 6% ; Total capital ratio of 8% ; and Leverage ratio of 4% . The following table presents regulatory capital metrics for SunTrust and the Bank at December 31: 2018 2017 (Dollars in millions) Amount Ratio Amount Ratio SunTrust Banks, Inc. CET1 $17,258 9.21 % $17,141 9.74 % Tier 1 capital 19,306 10.30 19,622 11.15 Total capital 22,517 12.02 23,028 13.09 Leverage 9.26 9.80 SunTrust Bank CET1 $20,137 11.01 % $19,474 11.29 % Tier 1 capital 20,160 11.02 19,496 11.31 Total capital 22,564 12.33 22,132 12.83 Leverage 9.95 9.97 The Company is also subject to a 2.5% capital conservation buffer that became applicable on January 1, 2016 and was phased-in through December 31, 2018. The capital conservation buffer is an amount above the minimum levels designed to ensure that banks remain well-capitalized, even in adverse economic scenarios . Preferred Stock Preferred stock at December 31 consisted of the following: (Dollars in millions) 2018 2017 2016 Series A $172 $172 $172 Series B 103 103 103 Series E 1 — 450 450 Series F 500 500 500 Series G 750 750 — Series H 500 500 — Total preferred stock $2,025 $2,475 $1,225 1 All 4,500 shares of outstanding Series E Preferred Stock were redeemed in the first quarter of 2018. The following table presents information related to the Company’s preferred stock outstanding at December 31, 2018 : Preferred 1 Stock Issue Date Number of Shares Authorized Number of Shares Issued Number of Shares Outstanding Dividend Dates Annual Per 2 Share Dividend Rate Optional Redemption Date Redemption Price Per Share Series A 9/12/2006 5,000 5,000 1,725 Quarterly beginning on December 15, 2006 Greater of 3-month LIBOR plus 0.53% per annum or 4.00% 9/15/2011 $100,000 Series B 12/15/2011 5,010 1,025 1,025 Quarterly beginning on March 15, 2012 Greater of 3-month LIBOR plus 0.645% per annum or 4.00% 12/15/2011 100,000 Series F 11/7/2014 5,000 5,000 5,000 Semi-annually beginning on June 15, 2015 until December 15, 2019 5.625% until December 15, 2019 12/15/2019 3 100,000 Quarterly beginning on March 15, 2020 3-month LIBOR plus 3.86% per annum beginning on March 15, 2020 Series G 5/2/2017 7,500 7,500 7,500 Semi-annually beginning on December 15, 2017 until June 15, 2022 5.05% until June 15, 2022 6/15/2022 3 100,000 Quarterly beginning on September 15, 2022 3-month LIBOR plus 3.102% per annum beginning on September 15, 2022 Series H 11/14/2017 5,000 5,000 5,000 Semi-annually beginning on June 15, 2018 until December 15, 2027 5.125% until December 15, 2027 12/15/2027 3 100,000 Quarterly beginning on March 15, 2028 3-month LIBOR plus 2.786% per annum beginning on March 15, 2028 1 All series of preferred stock have no par value, $100,000 liquidation preference per share, and no voting rights. 2 Dividends on the shares are noncumulative. 3 Redeemable at the option of the Company on or after the date stated or any time within 90 days following a regulatory capital event. In 2008, the Company issued to the U.S. Treasury as part of the CPP , 35,000 and 13,500 shares of Series C and D Fixed Rate Cumulative Perpetual Preferred Stock, respectively, and Series A and B warrants to purchase a total of 17.9 million shares of the Company's common stock. The Series A warrants entitled the holder to purchase 6 million shares of the Company's common stock at an exercise price of $33.70 per share, while the Series B warrants entitled the holder to purchase 11.9 million shares of the Company's common stock at an exercise price of $44.15 per share. In March 2011, the Company repurchased its Series C and D Preferred Stock from the U.S. Treasury , and in September 2011, the U.S. Treasury held a public auction to sell the Series A and B common stock purchase warrants. In conjunction with the U.S. Treasury ’s auction, the Company acquired 4 million of the common stock purchase warrants, Series A, for $11 million , which were then retired. In January and February of 2016, the Company acquired an additional 1.1 million of Series A common stock warrants and 5.4 million of Series B common stock warrants as part of its 2015 CCAR capital plan for a total of $24 million . During 2018, 3 million shares of common stock were issued upon exercise of Series A and B warrants. At December 31, 2018 , a total of 7,445

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	NOTE 16 - INCOME TAXES The components of the Provision for income taxes included in the Consolidated Statements of Income for the years ended December 31 are presented in the following table: (Dollars in millions) 2018 2017 2016 Current income tax provision: Federal $562 $129 $667 State 73 59 27 Total 635 188 694 Deferred income tax (benefit)/provision: Federal (122 ) 275 59 State 35 69 52 Total (87 ) 344 111 Total provision for income taxes $548 $532 $805 The 2017 Tax Act , enacted on December 22, 2017, reduced the U.S. federal corporate income tax rate from 35% to 21% effective January 1, 2018. The Company recorded a $55 million and $303 million net income tax benefit for the effects of the 2017 Tax Act as a component of the provision for income taxes for the years ended December 31, 2018 and 2017 , respectively. The $55 million adjustment completed the Company's accounting for the income tax effects of the 2017 Tax Act . The provision for income taxes does not reflect the tax effects of unrealized gains and losses and other income and expenses recorded in AOCI, with the exception of the remeasurement of the related DTA s and DTL s due to the enactment of the 2017 Tax Act . For additional information regarding AOCI, see Note 23 , “Accumulated Other Comprehensive Loss.” A reconciliation of the income tax provision at the statutory federal income tax rate to the Company’s actual provision for income taxes and actual effective tax rate for the years ended December 31 are presented in the following table: 2018 2017 2016 (Dollars in millions) Amount % of Pre-Tax Income Amount % of Pre-Tax Income Amount % of Income tax provision at federal statutory rate $698 21.0 % $982 35.0 % $939 35.0 % Increase/(decrease) resulting from: State income taxes, net 85 2.6 92 3.3 59 2.2 Tax-exempt interest (67 ) (2.0 ) (90 ) (3.2 ) (86 ) (3.2 ) Income tax credits, net of amortization 1 (106 ) (3.2 ) (117 ) (4.2 ) (86 ) (3.2 ) Impact of the remeasurement of DTAs and DTLs and other tax reform-related items (55 ) (1.7 ) (303 ) (10.8 ) — — Other 2 (7 ) (0.2 ) (32 ) (1.1 ) (21 ) (0.8 ) Total provision for income taxes and effective tax rate $548 16.5 % $532 19.0 % $805 30.0 % 1 Excludes income tax benefits of $84 million , $34 million , and $1 million for the years ended December 31, 2018, 2017, and 2016 , respectively, related to tax credits, which were recognized as a reduction to the related investment asset. 2 Includes excess tax benefits of $22 million , $25 million , and $15 million for the years ended December 31, 2018, 2017, and 2016 , respectively, related to the Company's adoption of ASU 2016-09. Deferred income tax assets and liabilities result from differences between the timing of the recognition of assets and liabilities for financial reporting purposes and for income tax purposes. These assets and liabilities are measured using the enacted federal and state tax rates expected to apply in the periods in which the DTA s or DTL s are expected to be realized. The net deferred income tax liability is recorded in Other liabilities in the Consolidated Balance Sheets. The significant DTA s and DTL s at December 31 , net of the federal impact for state taxes, are presented in the following table: (Dollars in millions) 2018 2017 DTAs: ALLL $376 $412 Net unrealized losses in AOCI 438 302 State NOLs and other carryforwards 111 227 Accruals and reserves 145 180 Other 21 17 Total gross DTAs 1,091 1,138 Valuation allowance (85 ) (143 ) Total DTAs 1,006 995 DTLs: Leasing 475 459 Servicing rights 270 290 Employee compensation and benefits 140 210 Deferred income 29 193 Goodwill and other intangible assets 156 155 Premises, property, and equipment 149 111 Loans 96 104 Other 38 41 Total DTLs 1,353 1,563 Net DTL ($347 ) ($568 ) The DTA s include state NOL s and other state carryforwards that will expire, if not utilized, in varying amounts from 2019 to 2038 . At December 31, 2018 and 2017 , the Company had a valuation allowance recorded against its state carryforwards and certain state DTA s of $85 million and $143 million , respectively. The decrease in the valuation allowance was due primarily to the reversal of the valuation allowance that was recorded against certain of STM 's pre-merger state NOL carryforwards that could not be carried forward by the Bank after the merger. The reversal of the valuation allowance was offset by the write-off of the related state NOL carryforwards. See Note 22 , “Business Segment Reporting,” for additional information regarding the merger of STM and the Bank. The following table provides a rollforward of the Company's gross federal and state UTB s, excluding interest and penalties, during the years ended December 31 : (Dollars in millions) 2018 2017 Balance at January 1 $141 $111 Increases in UTBs related to prior years 2 22 Decreases in UTBs related to prior years (6 ) (5 ) Increases in UTBs related to the current year 20 13 Decreases in UTBs related to settlements (2 ) — Decreases in UTBs related to lapse of the applicable statutes of limitations (10 ) — Balance at December 31 $145 $141 The amount of UTB s that would favorably affect the Company's effective tax rate, if recognized, was $113 million at December 31, 2018 . Interest and penalties related to UTB s are recorded in the Provision for income taxes in the Consolidated Statements of Income. The Company had a gross liability of $22 million and $17 million for interest and penalties related to its UTB s at December 31, 2018 and 2017 , respectively. During the years ended December 31, 2018 and 2017 , the Company recognized gross expenses of $5 million and $10 million , respectively, related to interest and penalties on the UTB s. The Company files U.S. federal, state, and local income tax returns. The Company's federal income tax returns are no longer subject to examination by the IRS for taxable years prior to 2015. With limited exceptions, the Company is no longer subject to examination by state and local taxing authorities for taxable years prior to 2012. It is reasonably possible that the liability for UTB s could decrease by as much as $50 million

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2018
Employee Benefit Plans [Abstract]
Pension and Other Postretirement Benefits Disclosure [Text Block]	NOTE 17 - EMPLOYEE BENEFIT PLANS The Company sponsors various compensation and benefit programs to attract and retain talent. Aligned with a pay for performance culture, the Company's plans and programs include short-term incentives, AIP , and various LTI plans. All incentive awards are subject to clawback provisions. Compensation expense for AIP and LTI plans with cash payouts was $235 million , $319 million , and $291 million for the years ended December 31, 2018, 2017, and 2016 , respectively. Compensation expense for short-term incentive plans with cash payouts was $466 million , $476 million , and $469 million for the years ended December 31, 2018, 2017, and 2016 , respectively. Stock-Based Compensation The Company provides stock-based awards through the 2018 Omnibus Incentive Compensation Plan and various other deferred compensation plans under which the Compensation Committee of the Board of Directors has the authority to grant various awards such as restricted stock, phantom stock units, stock options, and RSU s to key employees of the Company. Award vesting may be conditional based upon individual, business unit, Company, and/or performance relative to peer group metrics. The 2018 Omnibus Incentive Compensation Plan became effective in April 2018, under which the total number of shares available for grant as awards under this plan is 17 million , less shares subject to awards granted under pre-existing plans. Pre-existing plans include the 2009 Stock Plan and the 2004 Stock Plan. At December 31, 2018 , approximately 14 million shares were available for grant. All granted stock options are exercisable for 10 years after the grant date. Shares or units of restricted stock may be granted to employees and directors. Generally, grants to employees either cliff vest after three years or vest pro-rata annually over three years. Restricted stock and RSU grants may be subject to one or more criteria, including employment, performance, or other conditions as established by the Compensation Committee at the time of grant. Any shares of restricted stock that are forfeited will again become available for issuance under the Company's deferred compensation plans. An employee or director has the right to vote the shares of restricted stock after grant until they are forfeited. Compensation cost for restricted stock and RSU s is generally equal to the fair market value of the shares on the grant date of the award and is amortized over the vesting period. Dividends are paid on awarded, unvested restricted stock. The Company accrues and reinvests dividends in equivalent shares of SunTrust common stock for unvested RSU awards, which are paid out when the underlying RSU award vests. RSU awards are generally classified as equity. The following table presents a summary of stock options, restricted stock, and RSU activity for the year ended December 31, 2018 : Stock Options Restricted Stock RSUs (Dollars in millions, except per share data) Shares Price Weighted Shares Deferred Weighted Shares Weighted Balance, January 1, 2018 1,659,305 $9.06 - 64.58 $35.33 8,744 $1 $57.19 4,153,719 $44.68 Granted — — — 7,404 1 67.53 2,709,623 67.95 Exercised/distributed (774,704 ) 9.06 - 64.58 46.72 (8,744 ) — 57.19 (1,808,091 ) 42.84 Cancelled/expired/forfeited — — — — — — (241,722 ) 59.62 Amortization of restricted stock compensation — — — — (1 ) — — — Balance, December 31, 2018 884,601 $21.67 - 32.27 $25.36 7,404 $1 $67.53 4,813,529 $56.63 Exercisable, December 31, 2018 884,601 $25.36 The following table presents stock option information at December 31, 2018 : Options Outstanding Options Exercisable (Dollars in millions, except per share data) Number December 31, 2018 Weighted Weighted Total Number December 31, 2018 Weighted Weighted Total Range of Exercise Prices: $21.67 to 32.27 884,601 $25.36 3 $22 884,601 $25.36 3 $22 The aggregate intrinsic value in the preceding table represents the total pre-tax intrinsic value (the difference between the Company’s closing stock price on the last trading day of 2018 and the exercise price, multiplied by the number of in-the-money stock options) that would have been received by the option holders had all option holders exercised their options on December 31, 2018 . Additional option and stock-based compensation information at December 31 is presented in the following table: (Dollars in millions) 2018 2017 2016 Intrinsic value of options exercised 1 $17 $28 $43 Fair value of vested restricted shares 1 1 — 41 Fair value of vested RSUs 1 77 62 74 1 Measured as of the grant date. At December 31, 2018 and 2017 , there was $131 million and $75 million , respectively, of unrecognized stock-based compensation expense related to RSU s. The unrecognized stock compensation expense for December 31, 2018 is expected to be recognized over a weighted average period of 2.0 years. Unrecognized stock-based compensation expense related to restricted stock was immaterial at both December 31, 2018 and 2017 . Additionally, the Company allows for the granting of phantom stock units, whereby certain employees are granted the contractual right to receive an amount in cash equal to the fair market value of a share of common stock on the vesting date. These shares vest pro-rata annually over three years on the anniversary of the grant date and are subject to variable accounting. The employees are entitled to dividend-equivalent rights on the granted shares. The Company granted less than 1 million phantom stock units during each of the years ended December 31, 2018 and 2017 , and 2 million during the year ended December 31, 2016 . The unrecognized compensation expense related to these phantom stock units at December 31, 2018 and 2017 was $10 million and $56 million , respectively, based on the Company's stock price at those respective dates. Stock-based compensation expense recognized in Employee compensation in the Consolidated Statements of Income consisted of the following: Years Ended December 31 (Dollars in millions) 2018 2017 2016 RSUs $104 $83 $56 Phantom stock units 1 35 77 67 Restricted stock 1 — 2 Total stock-based compensation expense $140 $160 $125 Stock-based compensation tax benefit 2 $34 $61 $48 1 Phantom stock units are settled in cash. The Company paid $76 million , $80 million , and $28 million during the years ended December 31, 2018, 2017, and 2016 , respectively, related to these share-based liabilities. 2 Does not include excess tax benefits or deficiencies recognized in the Provision for income taxes in the Consolidated Statements of Income. Retirement Plans Noncontributory Pension Plans The Company maintains a frozen and funded noncontributory qualified retirement plan ("Retirement Plan") covering employees meeting certain service requirements. The Retirement Plan provides benefits based on salary and years of service. The SunTrust Retirement Plan includes a cash balance formula where the personal pension accounts continue to be credited with interest each year. The Company monitors the funded status of the Retirement Plan closely and, due to the current funded status, the Company did not make a contribution to it for the 2018 plan year. In the second quarter of 2017, the Company amended its NCF Retirement Plan in accordance with its decision to terminate the pension plan effective as of July 31, 2017. The Company reclassified $60 million of pre-tax deferred losses from AOCI into net income upon settlement of the NCF Retirement Plan, which was completed in the fourth quarter of 2018. The Company also maintains various frozen, unfunded, noncontributory nonqualified supplemental defined benefit pension plans that cover key executives of the Company (the " SERP ", the " ERISA Excess Plan", and the "Restoration Plan"). These plans provide defined benefits based on years of service and salary. Other Postretirement Benefits The Company provides certain health care and life insurance benefits (“Other Postretirement Benefits”) to retired employees. At the option of the Company, retirees may continue certain health and life insurance benefits if they meet specific age and service requirements at the time of retirement. The health care plans are contributory with participant contributions adjusted annually, and the life insurance plans are noncontributory. Certain retiree health benefits are funded in a Retiree Health Trust. Additionally, certain retiree life insurance benefits are funded in a VEBA . Effective April 1, 2014, the Company amended the plan, which now requires retirees age 65 and older to enroll in individual Medicare supplemental plans. In addition, the Company will fund a tax-advantaged HRA to assist some retirees with medical expenses. Changes in Benefit Obligations and Plan Assets The following table presents the change in benefit obligations, change in fair value of plan assets, funded status, accumulated benefit obligation, and the weighted average discount rate related to the Company's pension and other postretirement benefits plans for the years ended December 31 : Pension Benefits 1 Other Postretirement Benefits (Dollars in millions) 2018 2017 2018 2017 Benefit obligation, beginning of year $2,910 $2,747 $58 $58 Service cost 6 5 — — Interest cost 91 95 1 1 Plan participants’ contributions — — 5 4 Actuarial (gain)/loss (228 ) 225 (2 ) (1 ) Benefits paid (178 ) (156 ) (11 ) (8 ) Administrative expenses paid from pension trust (6 ) (6 ) — — Plan amendments — — — (5 ) Special termination benefits — — — 9 Settlement loss (127 ) — — — Benefit obligation, end of year 2 $2,468 $2,910 $51 $58 Change in plan assets: Fair value of plan assets, beginning of year $3,288 $3,016 $164 $157 Actual return on plan assets (100 ) 425 (3 ) 11 Employer contributions 3 8 9 — — Plan participants’ contributions — — 5 4 Benefits paid (178 ) (156 ) (11 ) (8 ) Administrative expenses paid from pension trust (6 ) (6 ) — — Settlement loss (127 ) — — — Fair value of plan assets, end of year $2,885 $3,288 $155 $164 Funded status at end of year 4, 5 $417 $378 $104 $106 Funded status at end of year (%) 117 % 113 % Accumulated benefit obligation $2,468 $2,910 Discount rate 4.27 % 3.62 % 3.96 % 3.29 % 1 Employer contributions represent the benefits that were paid to nonqualified plan participants. Unfunded nonqualified supplemental pension plans are not funded through plan assets. 2 Includes $68 million and $78 million of benefit obligations for the unfunded nonqualified supplemental pension plans at December 31, 2018 and 2017 , respectively. 3 The Company contributed less than $1 million to the other postretirement benefits plans during both 2018 and 2017 . 4 Pension benefits included assets of $485 million and $456 million , and liabilities of $68 million and $78 million , at December 31, 2018 and 2017 , respectively, recorded in Other assets in the Consolidated Balance Sheets. 5 Other postretirement benefits included assets of $104 million and $106 million at December 31, 2018 and 2017 , respectively, recorded in Other assets in the Consolidated Balance Sheets. Net Periodic Benefit Components of net periodic benefit related to the Company's pension and other postretirement benefits plans for the years ended December 31 are presented in the following table and are recognized in Employee benefits in the Consolidated Statements of Income: Pension Benefits 1 Other Postretirement Benefits (Dollars in millions) 2018 2017 2016 2018 2017 2016 Service cost $6 $5 $5 $— $— $— Interest cost 91 95 97 1 1 2 Expected return on plan assets (187 ) (195 ) (186 ) (5 ) (5 ) (5 ) Amortization of prior service credit — — — (6 ) (6 ) (6 ) Amortization of actuarial loss 22 25 25 — — — Deferred losses related to NCF Retirement Plan settlement 60 — — — — — Other — — — — 9 — Net periodic benefit ($8 ) ($70 ) ($59 ) ($10 ) ($1 ) ($9 ) Weighted average assumptions used to determine net periodic benefit: Discount rate 3.62 % 4.18 % 4.44 % 3.29 % 3.70 % 3.95 % Expected return on plan assets 5.90 6.66 6.68 3.10 3.12 3.13 Interest crediting rate 3.00 3.11 3.00 N/A 2 N/A 2 N/A 2 1 Administrative fees are recognized in service cost for each of the periods presented. 2 Other postretirement benefits plans do not include any plans with promised interest crediting rates; thus the weighted-average interest crediting rate assumption is not applicable ("N/A") for other postretirement benefit plans for all periods presented. Amounts Recognized in AOCI Components of the benefit obligations AOCI balance at December 31 were as follows: Pension Benefits Other Postretirement Benefits (Dollars in millions) 2018 2017 2018 2017 Prior service credit $— $— ($52 ) ($58 ) Net actuarial loss/(gain) 978 1,001 (17 ) (22 ) Total AOCI, pre-tax $978 $1,001 ($69 ) ($80 ) Other changes in plan assets and benefit obligations recognized in AOCI during 2018 were as follows: (Dollars in millions) Pension Benefits Other Postretirement Benefits Current year actuarial loss $59 $5 Amortization of prior service credit — 6 Amortization of actuarial loss (22 ) — Deferred losses related to NCF Retirement Plan settlement (60 ) — Total recognized in AOCI, pre-tax ($23 ) $11 Total recognized in net periodic (benefit)/loss and AOCI, pre-tax ($31 ) $1 The amortization for net gains and losses reflects a corridor based on 10% of the greater of the projected benefit obligation or the market-related value of assets. The amount of net gains and losses that exceeds the corridor is amortized over a fixed period based on the average remaining lifetime. Plan Assumptions Each year, the SBFC , which includes several members of senior management, reviews and approves the assumptions used in the year-end measurement calculations for each plan. The discount rate for each plan, used to determine the present value of future benefit obligations, is determined by matching the expected cash flows of each plan to a yield curve based on long-term, high quality fixed income debt instruments available as of the measurement date. A series of benefit payments projected to be paid by the plan is developed based on the most recent census data, plan provisions, and assumptions. The benefit payments at each future maturity date are discounted by the year-appropriate spot interest rates. The model then solves for the discount rate that produces the same present value of the projected benefit payments as generated by discounting each year’s payments by the spot interest rate. The Company utilizes a full yield curve approach to estimate the service and interest cost components of net periodic benefit expense for pension and other postretirement benefit plans by applying specific spot rates along the yield curve used in the determination of the benefit obligation to the relevant projected cash flows. Actuarial gains and losses are created when actual experience deviates from assumptions. The actuarial losses/(gains) during 2018 and 2017 for the pension plans resulted primarily from asset experience, partially offset by losses due to the decrease in discount rates. The SBFC establishes investment policies and strategies and formally monitors the performance of the investments throughout the year. The Company’s investment strategy with respect to pension assets is to invest the assets in accordance with ERISA and related fiduciary standards. The long-term primary investment objectives for the pension plans are to provide a commensurate amount of long-term growth of principal and income in order to satisfy the pension plan obligations without undue exposure to risk in any single asset class or investment category. The objectives are accomplished through investments in equities, fixed income, and cash equivalents using a mix that is conducive to participation in a rising market while allowing for protection in a declining market. The portfolio is viewed as long-term in its entirety, avoiding decisions regarding short-term concerns and any single investment. Asset allocation, as a percent of the total market value of the total portfolio, is set with the target percentages and ranges presented in the investment policy statement. Rebalancing occurs on a periodic basis to maintain the target allocation, but normal market activity may result in deviations. The basis for determining the overall expected long-term rate of return on plan assets considers past experience, current market conditions, and expectations on future trends. A building block approach is used that considers long-term inflation, real returns, equity risk premiums, target asset allocations, market corrections, and expenses. Capital market simulations, survey data, economic forecasts, and actuarial judgment are all used in this process. The expected long-term rate of return for pension benefits is 5.25% for 2019 , compared to 5.90% for 2018 . The investment strategy for the other postretirement benefit plans is maintained separately from the strategy for the pension plans. The Company’s investment strategy is to create a series of investment returns sufficient to provide a commensurate amount of long-term principal and income growth in order to satisfy the other postretirement benefit plan's obligations. Assets are diversified among equity funds and fixed income investments according to the mix approved by the SBFC . Due to other postretirement benefits having a shorter time horizon, a lower equity profile is appropriate. The expected long-term rate of return for other postretirement benefits is 3.27% for 2019 , compared to 3.10% for 2018 . Plan Assets Measured at Fair Value The following tables present combined pension and other postretirement benefit plan assets measured at fair value. See Note 20 , "Fair Value Election and Measurement," for level definitions within the fair value hierarchy. Fair Value Measurements at December 31, 2018 1 (Dollars in millions) Total Level 1 Level 2 Level 3 Money market funds 2 $112 $112 $— $— Equity securities 382 382 — — Mutual funds 3 : Equity index fund 46 46 — — Tax exempt municipal bond funds 86 86 — — Taxable fixed income index funds 12 12 — — Derivatives, net of collateral 2 — 2 — Fixed income securities 2,377 333 2,044 — Total plan assets $3,017 $971 $2,046 $— 1 Fair value measurements do not include pension benefits accrued income amounting to less than 0.9% of total plan assets. 2 Includes $11 million for other postretirement benefit plans. 3 Relates exclusively to other postretirement benefit plans. Fair Value Measurements at December 31, 2017 1 (Dollars in millions) Total Level 1 Level 2 Level 3 Money market funds 2 $138 $138 $— $— Equity securities 936 936 — — Mutual funds 3 : Equity index fund 56 56 — — Tax exempt municipal bond funds 85 85 — — Taxable fixed income index funds 12 12 — — Derivatives, net of collateral (5 ) (5 ) — — Fixed income securities 2,201 512 1,689 — Other assets 9 9 — — Total plan assets $3,432 $1,743 $1,689 $— 1 Fair value measurements do not include pension benefits accrued income amounting to less than 0.7% of total plan assets. 2 Includes $11 million for other postretirement benefit plans. 3 Relates exclusively to other postretirement benefit plans. Target allocations for pension and other postretirement benefits at December 31, by asset category, are presented below: Pension Benefits Other Postretirement Benefits 2018 Target Allocation % of plan assets 2018 Target Allocation % of plan assets 2018 2017 2018 2017 Cash equivalents 0-10 % 4 % 4 % 5-15 % 7 % 7 % Equity securities 0-25 13 29 20-40 30 34 Debt securities 75-100 83 67 50-70 63 59 Total 100 % 100 % 100 % 100 % The Company sets pension asset values equal to their market value, reflecting gains and losses immediately rather than deferring over a period of years, which provides a more realistic economic measure of the plan’s funded status and cost. Assumed healthcare cost trend rates have a significant effect on the amounts reported for the other postretirement benefit plans. At December 31, 2018 , the Company assumed that pre-65 retiree healthcare costs will increase at an initial rate of 7.25% per year. The Company expects this annual cost increase to decrease over a 7 year period to 4.50% per year. Assumed discount rates and expected returns on plan assets affect the amounts of net periodic benefit. A 25 basis point increase/decrease in the expected long-term return on plan assets would increase/decrease the net periodic benefit by $8 million for pension and other postretirement benefits plans. A 25 basis point increase/decrease in the discount rate would change the net periodic benefit by $1 million for pension and other postretirement benefits plans. Expected Cash Flows Expected cash flows for the pension and other postretirement benefit plans are presented in the following table: (Dollars in millions) Pension Benefits 1 Other Postretirement Benefits (excluding Medicare Subsidy) 2 Employer Contributions: 2019 (expected) to plan trusts $— $— 2019 (expected) to plan participants 3 7 — Expected Benefit Payments: 2019 175 6 2020 161 6 2021 161 6 2022 159 5 2023 159 4 2024 - 2028 773 16 1 Based on the funding status and ERISA limitations, the Company anticipates contributions to the Retirement Plan will not be required during 2019 . 2 Expected payments under other postretirement benefit plans are shown net of participant contributions. 3 The expected benefit payments for the SERP will be paid directly from the Company's corporate assets. Defined Contribution Plans SunTrust's employee benefit program includes a qualified defined contribution plan. For years ended December 31, 2018, 2017, and 2016 , the 401(k) plan provided a dollar-for-dollar match on the first 6% of eligible pay that a participant, including executive participants, elected to defer. SunTrust also maintains the SunTrust Banks, Inc. Deferred Compensation Plan in which key executives of the Company are eligible. Matching contributions for the deferred compensation plan are the same percentage as provided in the 401(k) plan, subject to limitations imposed by the plans' provisions and applicable laws and regulations. Matching contributions for both the Company's 401(k) plan and the deferred compensation plan fully vest upon two years of completed service. Furthermore, both plans permit an additional discretionary Company contribution equal to a fixed percentage of eligible pay. The Company's 401(k) expense, including any discretionary contributions, was $112 million , $130 million , and $105 million for the years ended December 31, 2018, 2017, and 2016

Guarantees

Guarantees	12 Months Ended
	Dec. 31, 2018
Guarantees [Abstract]
Guarantees	NOTE 18 – GUARANTEES The Company has undertaken certain guarantee obligations in the ordinary course of business. The issuance of a guarantee imposes an obligation for the Company to stand ready to perform and make future payments should certain triggering events occur. Payments may be in the form of cash, financial instruments, other assets, shares of stock, or through provision of the Company’s services. The following is a discussion of the guarantees that the Company has issued at December 31, 2018 . The Company has also entered into certain contracts that are similar to guarantees, but that are accounted for as derivative instruments as discussed in Note 19 , “Derivative Financial Instruments.” Letters of Credit Letters of credit are conditional commitments issued by the Company, generally to guarantee the performance of a client to a third party in borrowing arrangements, such as CP , bond financing, or similar transactions. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to clients but may be reduced by selling participations to third parties. The Company issues letters of credit that are classified as financial standby, performance standby, or commercial letters of credit; however, commercial letters of credit are considered guarantees of funding and are not subject to the disclosure requirements of guarantee obligations. At December 31, 2018 and 2017 , the maximum potential exposure to loss related to the Company’s issued letters of credit was $2.9 billion and $2.6 billion , respectively. The Company’s outstanding letters of credit generally have a term of more than one year. Some standby letters of credit are designed to be drawn upon in the normal course of business and others are drawn upon only in circumstances of dispute or default in the underlying transaction to which the Company is not a party. In all cases, the Company is entitled to reimbursement from the client. If a letter of credit is drawn upon and reimbursement is not provided by the client, the Company may take possession of the collateral securing the letter of credit, where applicable. The Company monitors its credit exposure under standby letters of credit in the same manner as it monitors other extensions of credit in accordance with its credit policies. Consistent with the methodologies used for all commercial borrowers, an internal assessment of the PD and loss severity in the event of default is performed. The Company’s credit risk management for letters of credit leverages the risk rating process to focus greater visibility on higher risk and higher dollar letters of credit. The allowance associated with letters of credit is a component of the unfunded commitments reserve recorded in Other liabilities on the Consolidated Balance Sheets and is included in the allowance for credit losses as disclosed in Note 8 , “Allowance for Credit Losses.” Additionally, unearned fees relating to letters of credit are recorded in Other liabilities on the Consolidated Balance Sheets. The net carrying amount of unearned fees was immaterial at both December 31, 2018 and 2017 . Loan Sales and Servicing The Company originates and purchases residential mortgage loans, a portion of which are sold to outside investors in the normal course of business through a combination of whole loan sales to GSE s, Ginnie Mae , and non-agency investors. The Company also originates and sells certain commercial mortgage loans to Fannie Mae and Freddie Mac , originates FHA insured loans, and issues and sells Ginnie Mae commercial MBS secured by FHA insured loans. When loans are sold, representations and warranties regarding certain attributes of the loans are made to third party purchasers. Subsequent to the sale, if a material underwriting deficiency or documentation defect is discovered, the Company may be obligated to repurchase the loan or to reimburse an investor for losses incurred (make whole requests), if such deficiency or defect cannot be cured by the Company within the specified period following discovery. These representations and warranties may extend through the life of the loan. In addition to representations and warranties related to loan sales, the Company makes representations and warranties that it will service the loans in accordance with investor servicing guidelines and standards, which may include (i) collection and remittance of principal and interest, (ii) administration of escrow for taxes and insurance, (iii) advancing principal, interest, taxes, insurance, and collection expenses on delinquent accounts, and (iv) loss mitigation strategies, including loan modifications and foreclosures. The following table summarizes the changes in the Company’s reserve for residential mortgage loan repurchases: Year Ended December 31 (Dollars in millions) 2018 2017 2016 Balance, beginning of period $39 $40 $57 Repurchase (benefit)/provision (9 ) — (17 ) Charge-offs, net of recoveries (4 ) (1 ) — Balance, end of period $26 $39 $40 A significant degree of judgment is used to estimate the mortgage repurchase liability as the estimation process is inherently uncertain and subject to imprecision. The Company believes that its reserve appropriately estimates incurred losses based on its current analysis and assumptions. While the mortgage repurchase reserve includes the estimated cost of settling claims related to required repurchases, the Company’s estimate of losses depends on its assumptions regarding GSE and other counterparty behavior, loan performance, home prices, and other factors. The liability is recorded in Other liabilities on the Consolidated Balance Sheets, and the related repurchase (benefit)/provision is recognized in Mortgage related income in the Consolidated Statements of Income. See Note 21 , “Contingencies,” for additional information on current legal matters related to loan sales. The following table summarizes the carrying value of the Company’s outstanding repurchased residential mortgage loans: (Dollars in millions) December 31, 2018 December 31, 2017 Outstanding repurchased residential mortgage loans: Performing LHFI $183 $203 Nonperforming LHFI 16 16 Total carrying value of outstanding repurchased residential mortgages $199 $219 Residential mortgage loans sold to Ginnie Mae are insured by the FHA or are guaranteed by the VA . As servicer, the Company may elect to repurchase delinquent loans in accordance with Ginnie Mae guidelines; however, the loans continue to be insured. The Company may also indemnify the FHA and VA for losses related to loans not originated in accordance with their guidelines. Commercial Mortgage Loan Loss Share Guarantee In connection with the acquisition of Pillar , the Company assumed a loss share obligation associated with the terms of a master loss sharing agreement with Fannie Mae for multi-family commercial mortgage loans that were sold by Pillar to Fannie Mae under Fannie Mae ’s delegated underwriting and servicing program. Upon the acquisition of Pillar , the Company entered into a lender contract amendment with Fannie Mae for multi-family commercial mortgage loans that Pillar sold to Fannie Mae prior to acquisition and that the Company sold to Fannie Mae subsequent to acquisition, whereby the Company bears a risk of loss of up to one-third of the incurred losses resulting from borrower defaults. The breach of any representation or warranty related to a loan sold to Fannie Mae could increase the Company’s level of risk-sharing associated with the loan. The outstanding UPB of loans sold subject to the loss share guarantee was $3.5 billion and $3.4 billion at December 31, 2018 and 2017 , respectively. The maximum potential exposure to loss was $1.0 billion and $962 million at December 31, 2018 and 2017 , respectively. Using probability of default and severity of loss estimates, the Company’s loss share liability was $5 million and $11 million at December 31, 2018 and 2017 , respectively, and is recorded in Other liabilities on the Consolidated Balance Sheets. Visa The Company executes credit and debit transactions through Visa and Mastercard . The Company is a defendant, along with Visa and Mastercard (the “Card Associations”), as well as other banks, in one of several antitrust lawsuits challenging the practices of the Card Associations (the “Litigation”). The Company entered into judgment and loss sharing agreements with Visa and certain other banks in order to apportion financial responsibilities arising from any potential adverse judgment or negotiated settlements related to the Litigation. Additionally, in connection with Visa ’s restructuring in 2007, shares of Visa common stock were issued to its financial institution members and the Company received its proportionate number of shares of Visa Inc. common stock, which were subsequently converted to Class B shares of Visa Inc. upon completion of Visa ’s IPO in 2008. A provision of the original Visa By-Laws, which was restated in Visa ’s certificate of incorporation, contains a general indemnification provision between a Visa member and Visa that explicitly provides that each member’s indemnification obligation is limited to losses arising from its own conduct and the specifically defined Litigation. While the district court approved a class action settlement of the Litigation in 2012 that settled the claims of both a damages class and an injunctive relief class, the U.S. Court of Appeals for the Second Circuit reversed the district court’s approval of the settlement on June 30, 2016. The U.S. Supreme Court denied plaintiffs’ petition for certiorari on March 27, 2017, and the case returned to the district court for further action. Since being remanded to the district court, plaintiffs have pursued two separate class actions—one class action seeking damages that names, among others, the Company as a defendant, and one class action seeking injunctive relief that does not name the Company as a defendant, but for which the Company could bear some responsibility under the judgment and loss sharing agreement described above. An agreement to resolve the claims was reached and the settlement was preliminarily approved by the district court on January 24, 2019. Agreements associated with Visa ’s IPO have provisions that Visa will fund a litigation escrow account, established for the purpose of funding judgments in, or settlements of, the Litigation. If the escrow account is insufficient to cover the Litigation losses, then Visa will issue additional Class A shares (“loss shares”). The proceeds from the sale of the loss shares would then be deposited in the escrow account. The issuance of the loss shares will cause a dilution of Visa ’s Class B shares as a result of an adjustment to lower the conversion factor of the Class B shares to Class A shares . Visa U.S.A.’s members are responsible for any portion of the settlement or loss on the Litigation after the escrow account is depleted and the value of the Class B shares is fully diluted. In May 2009, the Company sold its 3.2 million Class B shares to the Visa Counterparty and entered into a derivative with the Visa Counterparty . Under the derivative, the Visa Counterparty is compensated by the Company for any decline in the conversion factor as a result of the outcome of the Litigation. Conversely, the Company is compensated by the Visa Counterparty for any increase in the conversion factor. The amount of payments made or received under the derivative is a function of the 3.2 million shares sold to the Visa Counterparty , the change in conversion rate, and Visa ’s share price. The Visa Counterparty , as a result of its ownership of the Class B shares , is impacted by dilutive adjustments to the conversion factor of the Class B shares caused by the Litigation losses. Additionally, the Company will make periodic payments based on the notional of the derivative and a fixed rate until the date on which the Litigation is settled. The fair value of the derivative is estimated based on unobservable inputs consisting of management’s estimate of the probability of certain litigation scenarios and the timing of the resolution of the Litigation due in large part to the aforementioned decision by the U.S. Court of Appeals for the Second Circuit. The fair value of the derivative liability was $7 million and $15 million at December 31, 2018 and 2017 , respectively. The fair value of the derivative is estimated based on the Company’s expectations regarding the resolution of the Litigation. The ultimate impact to the Company could be significantly different based on the Litigation outcome. Public Deposits The Company holds public deposits from various states in which it does business. Individual state laws require banks to collateralize public deposits, typically as a percentage of their public deposit balance in excess of FDIC insurance and may also require a cross-guarantee among all banks holding public deposits of the individual state. The amount of collateral required varies by state and may also vary by bank within each state, depending on the individual state’s risk assessment of each participating bank. Certain states in which the Company holds public deposits use a pooled collateral method, whereby in the event of default of a bank holding public deposits, the collateral of the defaulting bank is liquidated to the extent necessary to recover the loss of public deposits of the defaulting bank. To the extent the collateral is insufficient, the remaining public deposit balances of the defaulting bank are recovered through an assessment of the other banks holding public deposits in that state. The maximum potential amount of future payments the Company could be required to make is dependent on a variety of factors, including the amount of public funds held by banks in the states in which the Company also holds public deposits and the amount of collateral coverage associated with any defaulting bank. Individual states appear to be monitoring this risk and evaluating collateral requirements; therefore, the likelihood that the Company would have to perform under this guarantee is dependent on whether any banks holding public funds default as well as the adequacy of collateral coverage. Other In the normal course of business, the Company enters into indemnification agreements and provides standard representations and warranties in connection with numerous transactions. These transactions include those arising from securitization activities, underwriting agreements, merger and acquisition agreements, swap clearing agreements, loan sales, contractual commitments, payment processing, sponsorship agreements, and various other business transactions or arrangements. The extent of the Company’s obligations under these indemnification agreements depends upon the occurrence of future events; therefore, the Company's potential future liability under these arrangements is not determinable. STIS and STRH , broker-dealer affiliates of the Company, use a common third party clearing broker to clear and execute their customers’ securities transactions and to hold customer accounts. Under their respective agreements, STIS and STRH agree to indemnify the clearing broker for losses that result from a customer’s failure to fulfill its contractual obligations. As the clearing broker’s rights to charge STIS and STRH have no maximum amount, the Company believes that the maximum potential obligation cannot be estimated. However, to mitigate exposure, the affiliate may seek recourse from the customer through cash or securities held in the defaulting customer's account. For the years ended December 31, 2018, 2017, and 2016 , STIS and STRH experienced minimal net losses as a result of the indemnity. The clearing agreements expire in May 2020 for both STIS and STRH

Derivative Financial Instrument

Derivative Financial Instruments	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	NOTE 19 - DERIVATIVE FINANCIAL INSTRUMENTS The Company enters into various derivative financial instruments, both in a dealer capacity to facilitate client transactions and as an end user as a risk management tool. The Company generally manages the risk associated with these derivatives within the established MRM and credit risk management frameworks. Derivatives may be used by the Company to hedge various economic or client-related exposures. In such instances, derivative positions are typically monitored using a VAR methodology, with exposures reviewed daily. Derivatives are also used as a risk management tool to hedge the Company’s balance sheet exposure to changes in identified cash flow and fair value risks, either economically or in accordance with hedge accounting provisions. The Company’s Corporate Treasury function is responsible for employing the various hedge strategies to manage these objectives. The Company enters into IRLC s on residential and commercial mortgage loans that are accounted for as freestanding derivatives. Additionally, certain contracts containing embedded derivatives are measured, in their entirety, at fair value. All derivatives, including both freestanding as well as any embedded derivatives that the Company bifurcates from the host contracts, are measured at fair value in the Consolidated Balance Sheets in Trading assets and derivative instruments and Trading liabilities and derivative instruments. The associated gains and losses are either recognized in AOCI, net of tax, or within the Consolidated Statements of Income, depending upon the use and designation of the derivatives. Credit and Market Risk Associated with Derivative Instruments Derivatives expose the Company to risk that the counterparty to the derivative contract does not perform as expected. The Company manages its exposure to counterparty credit risk associated with derivatives by entering into transactions with counterparties with defined exposure limits based on their credit quality and in accordance with established policies and procedures. All counterparties are reviewed regularly as part of the Company’s credit risk management practices and appropriate action is taken to adjust the exposure limits to certain counterparties as necessary. The Company’s derivative transactions are generally governed by ISDA agreements or other legally enforceable industry standard master netting agreements. In certain cases and depending on the nature of the underlying derivative transactions, bilateral collateral agreements are also utilized. Furthermore, the Company and its subsidiaries are subject to OTC derivative clearing requirements, which require certain derivatives to be cleared through central clearing houses, such as LCH and the CME . These clearing houses require the Company to post initial and variation margin to mitigate the risk of non-payment, the latter of which is received or paid daily based on the net asset or liability position of the contracts. Effective January 3, 2017, the CME amended its rulebook to legally characterize variation margin cash payments for cleared OTC derivatives as settlement rather than as collateral. Consistent with the CME 's amended requirements, LCH amended its rulebook effective January 16, 2018, to legally characterize variation margin cash payments for cleared OTC derivatives as settlement rather than as collateral. As a result, in the first quarter of 2018, the Company began reducing the corresponding derivative asset and liability balances for LCH - cleared OTC derivatives to reflect the settlement of those positions via the exchange of variation margin. When the Company has more than one outstanding derivative transaction with a single counterparty, and there exists a legal right of offset with that counterparty, the Company considers its exposure to the counterparty to be the net fair value of its derivative positions with that counterparty. If the net fair value is positive, then the corresponding asset value also reflects cash collateral held. At December 31, 2018 , the economic exposure of these net derivative asset positions was $541 million , reflecting $891 million of net derivative gains, adjusted for cash and other collateral of $350 million that the Company held in relation to these positions. At December 31, 2017 , the economic exposure of net derivative asset positions was $541 million , reflecting $940 million of net derivative gains, adjusted for cash and other collateral held of $399 million . Derivatives also expose the Company to market risk arising from the adverse effects that changes in market factors, such as interest rates, currency rates, equity prices, commodity prices, or implied volatility, may have on the value of the Company's derivatives. The Company manages this risk by establishing and monitoring limits on the types and degree of risk that may be undertaken. The Company measures its market risk exposure using a VAR methodology for derivatives designated as trading instruments. Other tools and risk measures are also used to actively manage risk associated with derivatives including scenario analysis and stress testing. Derivative instruments are priced using observable market inputs at a mid-market valuation point and take into consideration appropriate valuation adjustments for collateral, market liquidity, and counterparty credit risk. For purposes of determining fair value adjustments to its OTC derivative positions, the Company takes into consideration the credit profile and likelihood of default by counterparties and itself, as well as its net exposure, which considers legally enforceable master netting agreements and collateral along with remaining maturities. The expected loss of each counterparty is estimated using market-based views of counterparty default probabilities observed in the single-name CDS market, when available and of sufficient liquidity. When single-name CDS market data is not available or not of sufficient liquidity, the probability of default is estimated using a combination of the Company's internal risk rating system and sector/rating based CDS data. For purposes of estimating the Company’s own credit risk on derivative liability positions, the DVA , the Company uses probabilities of default from observable, sector/rating based CDS data. The net fair value of the Company's derivative contracts was adjusted by an immaterial amount for estimates of counterparty credit risk and its own credit risk during each of the years ended December 31, 2018 and 2017 . For additional information on the Company's fair value measurements, see Note 20 , "Fair Value Election and Measurement." Currently, the industry standard master netting agreements governing the majority of the Company's derivative transactions with counterparties contain bilateral events of default and acceleration provisions related to the creditworthiness of the Bank and the counterparty. Should the Bank be in default under any of these provisions, the Bank’s counterparties would be permitted to close out transactions with the Bank on a net basis, at amounts that would approximate the fair values of the derivatives, resulting in a single sum due by one party to the other. The counterparties would have the right to apply any collateral posted by the Bank against any net amount owed by the Bank. Additionally, certain of the Company’s derivative liability positions, totaling $589 million and $1.1 billion in fair value at December 31, 2018 and 2017 , respectively, contain provisions conditioned on downgrades of the Bank’s credit rating. These provisions, if triggered, would either give rise to an ATE that permits the counterparties to close-out net and apply collateral or, where a CSA is present, require the Bank to post additional collateral. At December 31, 2018 , the Bank held senior long-term debt credit ratings of Baal / A- / A- from Moody’s , S&P , and Fitch , respectively. At December 31, 2018 , ATE s have been triggered for less than $1 million in fair value liabilities. The maximum additional liability that could be triggered from ATE s was approximately $10 million at December 31, 2018 . At December 31, 2018 , $580 million in fair value of derivative liabilities were subject to CSA s, against which the Bank has posted $536 million in collateral, primarily in the form of cash. Pursuant to the terms of the CSA , the Bank would be required to post additional collateral of approximately $1 million against these contracts if the Bank were downgraded to Baa2/BBB+. Further downgrades to Baa3/BBB and Ba1/BBB- would require the Bank to post an additional $6 million and $10 million of collateral, respectively. Any downgrades below Ba2/BB+ do not contain predetermined collateral posting levels. Notional and Fair Value of Derivative Positions The following table presents the Company’s derivative positions at December 31, 2018 and 2017 . The notional amounts in the table are presented on a gross basis at December 31, 2018 and 2017 . Gross positive and gross negative fair value amounts associated with respective notional amounts are presented without consideration of any netting agreements, including collateral arrangements. Net fair value derivative amounts are adjusted on an aggregate basis, where applicable, to take into consideration the effects of legally enforceable master netting agreements, including any cash collateral received or paid, and are recognized in Trading assets and derivative instruments or Trading liabilities and derivative instruments on the Consolidated Balance Sheets . December 31, 2018 December 31, 2017 Fair Value Fair Value (Dollars in millions) Notional Amounts Asset Derivatives Liability Derivatives Notional Amounts Asset Derivatives Liability Derivatives Derivative instruments designated in hedging relationships Cash flow hedges: 1 Interest rate contracts hedging floating rate LHFI $10,500 $1 $2 $14,200 $2 $252 Subtotal 10,500 1 2 14,200 2 252 Fair value hedges: 2 Interest rate contracts hedging fixed rate debt 9,550 1 1 5,920 1 58 Interest rate contracts hedging brokered time deposits 59 — — 60 — — Subtotal 9,609 1 1 5,980 1 58 Derivative instruments not designated as hedging instruments 3 Interest rate contracts hedging: Residential MSRs 4 28,011 54 10 42,021 119 119 LHFS, IRLCs 5 4,891 18 38 7,590 9 6 LHFI 159 — — 175 2 2 Trading activity 6 127,286 771 687 126,366 1,066 946 Foreign exchange rate contracts hedging loans and trading activity 9,824 129 119 7,058 110 102 Credit contracts hedging: LHFI 830 — 14 515 — 11 Trading activity 7 4,058 97 95 3,454 15 12 Equity contracts hedging trading activity 6 34,471 1,447 1,644 38,907 2,499 2,857 Other contracts: IRLCs and other 8 1,393 20 15 2,017 18 16 Commodity derivatives 2,020 93 91 1,422 63 61 Subtotal 212,943 2,629 2,713 229,525 3,901 4,132 Total derivative instruments $233,052 $2,631 $2,716 $249,705 $3,904 $4,442 Total gross derivative instruments (before netting) $2,631 $2,716 $3,904 $4,442 Less: Legally enforceable master netting agreements (1,654 ) (1,654 ) (2,731 ) (2,731 ) Less: Cash collateral received/paid (338 ) (652 ) (371 ) (1,303 ) Total derivative instruments (after netting) $639 $410 $802 $408 1 See “Cash Flow Hedging” in this Note for further discussion. 2 See “Fair Value Hedging” in this Note for further discussion. 3 See “Economic Hedging Instruments and Trading Activities” in this Note for further discussion. 4 Notional amounts include $921 million and $16.6 billion related to interest rate futures at December 31, 2018 and 2017 , respectively. These futures contracts settle in cash daily, one day in arrears. The derivative asset or liability associated with the one day lag is included in the fair value column of this table. 5 Notional amounts include $116 million and $190 million related to interest rate futures at December 31, 2018 and 2017 , respectively. These futures contracts settle in cash daily, one day in arrears. The derivative asset or liability associated with the one day lag is included in the fair value column of this table. 6 Notional amounts include $1.2 billion and $9.8 billion related to interest rate futures at December 31, 2018 and 2017 , and $136 million and $1.2 billion related to equity futures at December 31, 2018 and 2017 , respectively. These futures contracts settle in cash daily, one day in arrears. The derivative asset or liability associated with the one day lag is included in the fair value column of this table. Notional amounts also include amounts related to interest rate swaps hedging fixed rate debt. 7 Notional amounts include $6 million and $4 million from purchased credit risk participation agreements at December 31, 2018 and December 31, 2017 , and $33 million and $11 million from written credit risk participation agreements at December 31, 2018 and December 31, 2017 , respectively. These notional amounts are calculated as the notional of the derivative participated adjusted by the relevant RWA conversion factor. 8 Notional amounts include $41 million and $49 million related to the Visa derivative liability at December 31, 2018 and December 31, 2017 , respectively. See Note 18 , "Gua rantees" for additional information. Netting of Derivative Instruments The Company has various financial assets and financial liabilities that are subject to enforceable master netting agreements or similar agreements. The Company's securities borrowed or purchased under agreements to resell, and securities sold under agreements to repurchase, that are subject to enforceable master netting agreements or similar agreements, are discussed in Note 4 , "Federal Funds Sold and Securities Financing Activities." The Company enters into ISDA or other legally enforceable industry standard master netting agreements with derivative counterparties. Under the terms of the master netting agreements, all transactions between the Company and the counterparty constitute a single business relationship such that in the event of default, the nondefaulting party is entitled to set off claims and apply property held by that party in respect of any transaction against obligations owed. The following tables present total gross derivative instrument assets and liabilities at December 31, 2018 and 2017 , which are adjusted to reflect the effects of legally enforceable master netting agreements and cash collateral received or paid when calculating the net amount reported in the Consolidated Balance Sheets. Also included in the tables are financial instrument collateral related to legally enforceable master netting agreements that represents securities collateral received or pledged and customer cash collateral held at third party custodians. These amounts are not offset on the Consolidated Balance Sheets but are shown as a reduction to total derivative instrument assets and liabilities to derive net derivative assets and liabilities. These amounts are limited to the derivative asset/liability balance, and accordingly, do not include excess collateral received/pledged. (Dollars in millions) Gross Amount Amount Offset Net Amount Presented in Consolidated Balance Sheets Held/Pledged Financial Instruments Net Amount December 31, 2018 Derivative instrument assets: Derivatives subject to master netting arrangement or similar arrangement $2,425 $1,873 $552 $12 $540 Derivatives not subject to master netting arrangement or similar arrangement 20 — 20 — 20 Exchange traded derivatives 186 119 67 — 67 Total derivative instrument assets $2,631 $1,992 $639 1 $12 $627 Derivative instrument liabilities: Derivatives subject to master netting arrangement or similar arrangement $2,521 $2,187 $334 $14 $320 Derivatives not subject to master netting arrangement or similar arrangement 76 — 76 — 76 Exchange traded derivatives 119 119 — — — Total derivative instrument liabilities $2,716 $2,306 $410 2 $14 $396 December 31, 2017 Derivative instrument assets: Derivatives subject to master netting arrangement or similar arrangement $3,491 $2,923 $568 $28 $540 Derivatives not subject to master netting arrangement or similar arrangement 18 — 18 — 18 Exchange traded derivatives 395 179 216 — 216 Total derivative instrument assets $3,904 $3,102 $802 1 $28 $774 Derivative instrument liabilities: Derivatives subject to master netting arrangement or similar arrangement $4,128 $3,855 $273 $27 $246 Derivatives not subject to master netting arrangement or similar arrangement 130 — 130 — 130 Exchange traded derivatives 184 179 5 — 5 Total derivative instrument liabilities $4,442 $4,034 $408 2 $27 $381 1 At December 31, 2018 , $639 million , net of $338 million offsetting cash collateral, is recognized in Trading assets and derivative instruments within the Company's Consolidated Balance Sheets. At December 31, 2017 , $802 million , net of $371 million offsetting cash collateral, is recognized in Trading assets and derivative instruments within the Company's Consolidated Balance Sheets. 2 At December 31, 2018 , $410 million , net of $652 million offsetting cash collateral, is recognized in Trading liabilities and derivative instruments within the Company's Consolidated Balance Sheets. At December 31, 2017 , $408 million , net of $1.3 billion offsetting cash collateral, is recognized in Trading liabilities and derivative instruments within the Company's Consolidated Balance Sheets. Fair Value and Cash Flow Hedging Instruments Fair Value Hedging The Company enters into interest rate swap agreements as part of its risk management objectives for hedging exposure to changes in fair value due to changes in interest rates. These hedging arrangements convert certain fixed rate long-term debt and CD s to floating rates. Subsequent to the adoption of ASU 2017-12, changes in the fair value of the hedging instrument attributable to the hedged risk are recognized in the same income statement line as the earnings impact from the hedged item. There were no components of derivative gains or losses excluded in the Company’s assessment of hedge effectiveness related to the fair value hedges. For additional information on the Company's adoption of ASU 2017-12 and related policy updates, see Note 1 , “Significant Accounting Policies.” Cash Flow Hedging The Company utilizes a comprehensive risk management strategy to monitor sensitivity of earnings to movements in interest rates. Specific types of funding and principal amounts hedged are determined based on prevailing market conditions and the shape of the yield curve. In conjunction with this strategy, the Company may employ various interest rate derivatives as risk management tools to hedge interest rate risk from recognized assets and liabilities or from forecasted transactions. The terms and notional amounts of derivatives are determined based on management’s assessment of future interest rates, as well as other factors. The Company enters into interest rate swaps designated as cash flow hedging instruments to hedge its exposure to benchmark interest rate risk associated with floating rate loans. For the years ended December 31, 2018, 2017, and 2016 , the amount of pre-tax loss recognized in OCI on derivative instruments was $161 million , $54 million , and $145 million , respectively. At December 31, 2018 , the maturities for hedges of floating rate loans ranged from less than one year to five years , with the weighted average being 2.5 years . At December 31, 2017 , the maturities for hedges of floating rate loans ranged from less than one year to five years , with the weighted average being 3.6 years . These hedges have been highly effective in offsetting the designated risks. At December 31, 2018 , $178 million of deferred net pre-tax losses on derivative instruments designated as cash flow hedges on floating rate loans recognized in AOCI are expected to be reclassified into net interest income during the next twelve months. The amount to be reclassified into income incorporates the impact from both active and terminated cash flow hedges, including the net interest income earned on the active hedges, assuming no changes in LIBOR . The Company may choose to terminate or de-designate a hedging relationship due to a change in the risk management objective for that specific hedge item, which may arise in conjunction with an overall balance sheet management strategy. Pursuant to the adoption of ASU 2017-12, the following table presents gains and losses on derivatives in fair value and cash flow hedging relationships by contract type and by income statement line item for the year ended December 31, 2018 . For the years ended December 31 , 2017 and 2016 , the amounts presented below were not conformed to the new hedge accounting guidance. The table does not disclose the financial impact of the activities that these derivative instruments are intended to hedge. Net Interest Income Noninterest Income (Dollars in millions) Interest and fees on LHFI Interest on Long-term Debt Interest on Deposits Trading Income Total Year Ended December 31, 2018 Interest income/(expense), including the effects of fair value and cash flow hedges $6,058 ($375 ) ($711 ) $161 $5,133 (Loss)/gain on fair value hedging relationships: Interest rate contracts: Amounts related to interest settlements on derivatives $— ($1 ) $— $— ($1 ) Recognized on derivatives — (24 ) — — (24 ) Recognized on hedged items — 11 1 — — 11 Net expense recognized on fair value hedges $— ($14 ) $— $— ($14 ) Loss on cash flow hedging relationships: Interest rate contracts: Amount of pre-tax loss reclassified from AOCI into income ($72 ) 2 $— $— $— ($72 ) Net expense recognized on cash flow hedges ($72 ) $— $— $— ($72 ) Year Ended December 31, 2017 Interest income/(expense), including the effects of fair value and cash flow hedges $5,385 ($288 ) ($404 ) $189 $4,882 Gain/(loss) on fair value hedging relationships: Interest rate contracts: Amounts related to interest settlements on derivatives $— $15 $— $— $15 Recognized on derivatives — — — (38 ) (38 ) Recognized on hedged items — — — 40 40 Net income recognized on fair value hedges $— $15 $— $2 $17 Gain on cash flow hedging relationships: Interest rate contracts: Amount of pre-tax gain reclassified from AOCI into income $89 2 $— $— $— $89 Net income recognized on cash flow hedges $89 $— $— $— $89 Year Ended December 31, 2016 Interest income/(expense), including the effects of fair value and cash flow hedges $4,939 ($260 ) ($259 ) $211 $4,631 Gain/(loss) on fair value hedging relationships: Interest rate contracts: Amounts related to interest settlements on derivatives $— $17 $— $— $17 Recognized on derivatives — — — (87 ) (87 ) Recognized on hedged items — — — 89 89 Net income recognized on fair value hedges $— $17 $— $2 $19 Gain on cash flow hedging relationships: Interest rate contracts: Amount of pre-tax gain reclassified from AOCI into income $244 2 $— $— $— $244 Net income recognized on cash flow hedges $244 $— $— $— $244 1 Includes amortization from de-designated fair value hedging relationships. 2 These amounts include pre-tax gains/(losses) related to cash flow hedging relationships that have been terminated and were reclassified into earnings consistent with the pattern of net cash flows expected to be recognized. The following table presents the carrying amount of hedged liabilities on the Consolidated Balance Sheets in fair value hedging relationships and the associated cumulative basis adjustment related to the application of hedge accounting: Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of Hedged Liabilities (Dollars in millions) Carrying Amount of Hedged Liabilities Hedged Items Currently Designated Hedged Items No Longer Designated December 31, 2018 Long-term debt $8,411 ($10 ) ($120 ) Brokered time deposits 29 — — Economic Hedging Instruments and Trading Activities In addition to designated hedge accounting relationships, the Company also enters into derivatives as an end user to economically hedge risks associated with certain non-derivative and derivative instruments, along with entering into derivatives in a trading capacity with its clients. The primary risks that the Company economically hedges are interest rate risk, foreign exchange risk, and credit risk. The Company mitigates these risks by entering into offsetting derivatives either on an individual basis or collectively on a macro basis. The Company utilizes interest rate derivatives as economic hedges related to: • Residential MSRs . The Company hedges these instruments with a combination of interest rate derivatives, including forward and option contracts, futures, and forward rate agreements. • Residential mortgage IRLC s and LHFS . The Company hedges these instruments using forward and option contracts, futures, and forward rate agreements. The Company is exposed to volatility and changes in foreign exchange rates associated with certain commercial loans. To hedge against this foreign exchange rate risk, the Company enters into foreign exchange rate contracts that provide for the future receipt and delivery of foreign currency at previously agreed-upon terms. The Company enters into CDS to hedge credit risk associated with certain loans held within its Wholesale segment. The Company accounts for these contracts as derivatives, and accordingly, recognizes these contracts at fair value, with changes in fair value recognized in Other noninterest income in the Consolidated Statements of Income. Trading activity primarily includes interest rate swaps, equity derivatives, CDS , futures, options, foreign exchange rate contracts, and commodity derivatives. These derivatives are entered into in a dealer capacity to facilitate client transactions, or are utilized as a risk management tool by the Company as an end user (predominantly in certain macro-hedging strategies). The impacts of derivative instruments used for economic hedging or trading purposes on the Consolidated Statements of Income are presented in the following table: Classification of (Loss)/Gain Recognized in Income on Derivatives Amount of (Loss)/Gain Recognized in Income on Derivatives During the Year Ended December 31 (Dollars in millions) 2018 2017 2016 Derivative instruments not designated as hedging instruments: Interest rate contracts hedging: Residential MSRs Mortgage related income ($110 ) $35 $45 LHFS, IRLCs Mortgage related income 45 (54 ) (6 ) LHFI Other noninterest income 1 — (1 ) Trading activity Trading income 69 42 51 Foreign exchange rate contracts hedging loans and trading activity Trading income 48 (37 ) 101 Credit contracts hedging: LHFI Other noninterest income — (4 ) (3 ) Trading activity Trading income 22 26 19 Equity contracts hedging trading activity Trading income (12 ) — 4 Other contracts: IRLCs and other Mortgage related income, 63 185 210 Commodity derivatives Trading income 1 1 3 Total $127 $194 $423 Credit Derivative Instruments As part of the Company's trading businesses, the Company enters into contracts that are, in form or substance, written guarantees; specifically, CDS , risk participations, and TRS . The Company accounts for these contracts as derivatives, and accordingly, records these contracts at fair value, with changes in fair value recognized in Trading income in the Consolidated Statements of Income. At December 31, 2018 , there were no purchased CDS contracts designated as trading instruments. At December 31, 2017 , the gross notional amount of purchased CDS contracts designated as trading instruments was $5 million . The fair value of purchased CDS was immaterial at December 31, 2017 . The Company has also entered into TRS contracts on loans. The Company’s TRS business consists of matched trades, such that when the Company pays depreciation on one TRS , it receives the same amount on the matched TRS . To mitigate its credit risk, the Company typically receives initial cash collateral from the counterparty upon entering into the TRS and is entitled to additional collateral if the fair value of the underlying reference assets deteriorates. There were $2.0 billion and $1.7 billion of outstanding TRS notional balances at December 31, 2018 and 2017 , respectively. The fair values of these TRS assets and liabilities at December 31, 2018 were $97 million and $94 million , respectively, and related cash collateral held at December 31, 2018 was $601 million . The fair values of the TRS assets and liabilities at December 31, 2017 were $15 million and $13 million , respectively, and related cash collateral held at December 31, 2017 was $368 million . For additional information on the Company's TRS contracts, see Note 12 , "Certain Transfers of Financial Assets and Variable Interest Entities," as well as Note 20 , "Fair Value Election and Measurement." The Company writes risk participations, which are credit derivatives, whereby the Company has guaranteed payment to a dealer counterparty in the event the counterparty experiences a loss on a derivative, such as an interest rate swap, due to a failure to pay by the counterparty’s customer (the “obligor”) on that derivative. The Company manages its payment risk on its risk participations by monitoring the creditworthiness of the obligors, which are all corporations or partnerships, through the normal credit review process that the Company would have performed had it entered into a derivative directly with the obligors. To date, no material losses have been incurred related to the Company’s written risk participations. At December 31, 2018 , the remaining terms on these risk participations generally ranged from less than one year to 10 years , with a weighted average term on the maximum estimated exposure of 5.9 years . At December 31, 2017 , the remaining terms on these risk participations generally ranged from less than one year to nine years , with a weighted average term on the maximum estimated exposure of 5.5 years . The Company’s maximum estimated exposure to written risk participations, as measured by projecting a maximum value of the guaranteed derivative instruments based on interest rate curve simulations and assuming 100% default by all obligors on the maximum values, was approximately $217 million and $55 million at December 31, 2018 and 2017 , respectively. The fair values of the written risk participations were immaterial at both December 31, 2018 and 2017

Fair Value Election and Measure

Fair Value Election and Measurement	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value Election and Measurement	NOTE 20 - FAIR VALUE ELECTION AND MEASUREMENT The Company measures certain assets and liabilities at fair value, which are classified as level 1, 2, or 3 within the fair value hierarchy, as shown below, on the basis of whether the measurement employs observable or unobservable inputs. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect the Company’s own assumptions, taking into account information about market participant assumptions that is readily available. • Level 1: Quoted prices for identical instruments in active markets • Level 2: Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets • Level 3: Valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable Fair value is defined as the price that would be received to sell an asset, or paid to transfer a liability, in an orderly transaction between market participants at the measurement date. The Company’s recurring fair value measurements are based on either a requirement to measure such assets and liabilities at fair value or on the Company’s election to measure certain financial assets and liabilities at fair value. Assets and liabilities that are required to be measured at fair value on a recurring basis include trading securities, derivative instruments, securities AFS, and certain other equity securities. Assets and liabilities that the Company has elected to measure at fair value on a recurring basis include trading loans, certain LHFS and LHFI, residential MSRs, brokered time deposits, and certain structured notes and fixed rate issuances included in long-term debt. The Company elects to measure certain assets and liabilities at fair value to better align its financial performance with the economic value of actively traded or hedged assets or liabilities. The use of fair value also enables the Company to mitigate non-economic earnings volatility caused from financial assets and liabilities being measured using different bases of accounting, as well as to more accurately portray the active and dynamic management of the Company’s balance sheet. The Company uses various valuation techniques and assumptions in estimating fair value. The assumptions used to estimate the value of an instrument have varying degrees of impact to the overall fair value of an asset or liability. This process involves gathering multiple sources of information, including broker quotes, values provided by pricing services, trading activity in other identical or similar securities, market indices, and pricing matrices. When observable market prices for the asset or liability are not available, the Company employs various modeling techniques, such as discounted cash flow analyses, to estimate fair value. Models used to produce material financial reporting information are validated prior to use and following any material change in methodology. Their performance is monitored at least quarterly, and any material deterioration in model performance is escalated. The Company has formal processes and controls in place to support the appropriateness of its fair value estimates. For fair values obtained from a third party, or those that include certain trader estimates of fair value, there is an independent price validation function that provides oversight for these estimates. For level 2 instruments and certain level 3 instruments, the validation generally involves evaluating pricing received from two or more third party pricing sources that are widely used by market participants. The Company evaluates this pricing information from both a qualitative and quantitative perspective and determines whether any pricing differences exceed acceptable thresholds. If thresholds are exceeded, the Company assesses differences in valuation approaches used, which may include contacting a pricing service to gain further insight into the valuation of a particular security or class of securities to resolve the pricing variance, which could include an adjustment to the price used for financial reporting purposes. The Company classifies instruments within level 2 in the fair value hierarchy when it determines that external pricing sources estimated fair value using prices for similar instruments trading in active markets. A wide range of quoted values from pricing sources may imply a reduced level of market activity and indicate that significant adjustments to price indications have been made. In such cases, the Company evaluates whether the asset or liability should be classified as level 3. Determining whether to classify an instrument as level 3 involves judgment and is based on a variety of subjective factors, including whether a market is inactive. A market is considered inactive if significant decreases in the volume and level of activity for the asset or liability have been observed. Recurring Fair Value Measurements The following tables present certain information regarding assets and liabilities measured at fair value on a recurring basis and the changes in fair value for those specific financial instruments for which fair value has been elected. December 31, 2018 Fair Value Measurements (Dollars in millions) Level 1 Level 2 Level 3 Netting Adjustments 1 Assets/Liabilities at Fair Value Assets Trading assets and derivative instruments: U.S. Treasury securities $262 $— $— $— $262 Federal agency securities — 188 — — 188 U.S. states and political subdivisions — 54 — — 54 MBS - agency — 860 — — 860 Corporate and other debt securities — 700 — — 700 CP — 190 — — 190 Equity securities 73 — — — 73 Derivative instruments 186 2,425 20 (1,992 ) 639 Trading loans — 2,540 — — 2,540 Total trading assets and derivative instruments 521 6,957 20 (1,992 ) 5,506 Securities AFS: U.S. Treasury securities 4,211 — — — 4,211 Federal agency securities — 221 — — 221 U.S. states and political subdivisions — 589 — — 589 MBS - agency residential — 22,864 — — 22,864 MBS - agency commercial — 2,627 — — 2,627 MBS - non-agency commercial — 916 — — 916 Corporate and other debt securities — 14 — — 14 Total securities AFS 2 4,211 27,231 — — 31,442 LHFS — 1,178 — — 1,178 LHFI — — 163 — 163 Residential MSRs — — 1,983 — 1,983 Other assets 2 95 — — — 95 Liabilities Trading liabilities and derivative instruments: U.S. Treasury securities 801 — — — 801 MBS - agency — 3 — — 3 Corporate and other debt securities — 385 — — 385 Equity securities 5 — — — 5 Derivative instruments 119 2,590 7 (2,306 ) 410 Total trading liabilities and derivative instruments 925 2,978 7 (2,306 ) 1,604 Brokered time deposits — 403 — — 403 Long-term debt — 289 — — 289 1 Amounts represent offsetting cash collateral received from, and paid to, the same derivative counterparties, and the impact of netting derivative assets and derivative liabilities when a legally enforceable master netting agreement or similar agreement exists. See Note 19 , “Derivative Financial Instruments,” for additional information. 2 Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability . See Note 11 , “Other Assets,” for additional information. December 31, 2017 Fair Value Measurements (Dollars in millions) Level 1 Level 2 Level 3 Netting Adjustments 1 Assets/Liabilities at Fair Value Assets Trading assets and derivative instruments: U.S. Treasury securities $157 $— $— $— $157 Federal agency securities — 395 — — 395 U.S. states and political subdivisions — 61 — — 61 MBS - agency — 700 — — 700 Corporate and other debt securities — 655 — — 655 CP — 118 — — 118 Equity securities 56 — — — 56 Derivative instruments 395 3,493 16 (3,102 ) 802 Trading loans — 2,149 — — 2,149 Total trading assets and derivative instruments 608 7,571 16 (3,102 ) 5,093 Securities AFS: U.S. Treasury securities 4,331 — — — 4,331 Federal agency securities — 259 — — 259 U.S. states and political subdivisions — 617 — — 617 MBS - agency residential — 22,704 — — 22,704 MBS - agency commercial — 2,086 — — 2,086 MBS - non-agency residential — — 59 — 59 MBS - non-agency commercial — 866 — — 866 ABS — — 8 — 8 Corporate and other debt securities — 12 5 — 17 Total securities AFS 2 4,331 26,544 72 — 30,947 LHFS — 1,577 — — 1,577 LHFI — — 196 — 196 Residential MSRs — — 1,710 — 1,710 Other assets 2 56 — — — 56 Liabilities Trading liabilities and derivative instruments: U.S. Treasury securities 577 — — — 577 Corporate and other debt securities — 289 — — 289 Equity securities 9 — — — 9 Derivative instruments 183 4,243 16 (4,034 ) 408 Total trading liabilities and derivative instruments 769 4,532 16 (4,034 ) 1,283 Brokered time deposits — 236 — — 236 Long-term debt — 530 — — 530 1 Amounts represent offsetting cash collateral received from, and paid to, the same derivative counterparties, and the impact of netting derivative assets and derivative liabilities when a legally enforceable master netting agreement or similar agreement exists. See Note 19 , “Derivative Financial Instruments,” for additional information. 2 Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability . See Note 11 , “Other Assets,” for additional information. The following tables present the difference between fair value and the aggregate UPB for which the FVO has been elected for certain trading loans, LHFS, LHFI, brokered time deposits, and long-term debt instruments. (Dollars in millions) Fair Value at December 31, 2018 Aggregate UPB at December 31, 2018 Fair Value Over/(Under) Unpaid Principal Assets: Trading loans $2,540 $2,526 $14 LHFS: Accruing 1,178 1,128 50 LHFI: Accruing 158 163 (5 ) Nonaccrual 5 6 (1 ) Liabilities: Brokered time deposits 403 403 — Long-term debt 289 286 3 (Dollars in millions) Fair Value at December 31, 2017 Aggregate UPB at December 31, 2017 Fair Value Over/(Under) Unpaid Principal Assets: Trading loans $2,149 $2,111 $38 LHFS: Accruing 1,576 1,533 43 Past due 90 days or more 1 1 — LHFI: Accruing 192 198 (6 ) Nonaccrual 4 6 (2 ) Liabilities: Brokered time deposits 236 233 3 Long-term debt 530 517 13 The following tables present the changes in fair value of financial instruments for which the FVO has been elected. The tables do not reflect the change in fair value attributable to related economic hedges that the Company uses to mitigate market-related risks associated with the financial instruments. Generally, changes in the fair value of economic hedges are recognized in Trading income, Mortgage related income, Commercial real estate related income, or Other noninterest income as appropriate, and are designed to partially offset the change in fair value of the financial instruments referenced in the tables below. The Company’s economic hedging activities are deployed at both the instrument and portfolio level. Fair Value Gain/(Loss) for the Year Ended December 31, 2018 for Items Measured at Fair Value Pursuant to Election of the FVO (Dollars in millions) Trading Income Mortgage 1 Other Noninterest Income Total Changes in Fair Values Included in Earnings 2 Assets: Trading loans $14 $— $— $14 LHFS — 7 — 7 LHFI — — 1 1 Residential MSRs — (141 ) — (141 ) Liabilities: Brokered time deposits 13 — — 13 Long-term debt 10 — — 10 1 Income related to LHFS does not include income from IRLC s. For the year ended December 31, 2018 , income related to residential MSRs includes income recognized upon the sale of loans reported at LOCOM . 2 Changes in fair value for the year ended December 31, 2018 exclude accrued interest for the period then ended. Interest income or interest expense on trading loans, LHFS, LHFI, brokered time deposits, and long-term debt that have been elected to be measured at fair value are recognized in Interest income or Interest expense in the Consolidated Statements of Income. Fair Value Gain/(Loss) for the Year Ended December 31, 2017 for Items Measured at Fair Value Pursuant to Election of the FVO (Dollars in millions) Trading Mortgage 1 Other Total 2 Assets: Trading loans $21 $— $— $21 LHFS — 61 — 61 Residential MSRs — (243 ) — (243 ) Liabilities: Long-term debt 21 — — 21 1 Income related to LHFS does not include income from IRLC s. For the year ended December 31, 2017 , income related to residential MSRs includes income recognized upon the sale of loans reported at LOCOM . 2 Changes in fair value for the year ended December 31, 2017 exclude accrued interest for the period then ended. Interest income or interest expense on trading loans, LHFS, and long-term debt that have been elected to be measured at fair value are recognized in Interest income or Interest expense in the Consolidated Statements of Income. Fair Value Gain/(Loss) for the Year Ended December 31, 2016 for Items Measured at Fair Value Pursuant to Election of the FVO (Dollars in millions) Trading Mortgage 1 Other Total 2 Assets: Trading loans $15 $— $— $15 LHFS — 75 — 75 Residential MSRs — (242 ) — (242 ) Liabilities: Brokered time deposits 4 — — 4 Long-term debt 27 — — 27 1 Income related to LHFS does not include income from IRLC s. For the year ended December 31, 2016 , income related to residential MSRs includes income recognized upon the sale of loans reported at LOCOM . 2 Changes in fair value for the year ended December 31, 2016 exclude accrued interest for the period then ended. Interest income or interest expense on trading loans, LHFS, brokered time deposits, and long-term debt that have been elected to be measured at fair value are recognized in Interest income or Interest expense in the Consolidated Statements of Income. The following is a discussion of the valuation techniques and inputs used in estimating fair value for assets and liabilities measured at fair value on a recurring basis. Trading Assets and Derivative Instruments and Investment Securities Securities accounted for at fair value include both the trading and AFS portfolios. Unless otherwise indicated, trading assets are priced by the trading desk and investment securities are valued by an independent third party pricing service. The third party pricing service gathers relevant market data and observable inputs, such as, but not limited to, benchmark yields, reported trades, broker/dealer quotes, and issuer spreads. The Company reviews pricing methodologies provided by the pricing service, which may include detailed reviews of the assumptions and inputs for individual securities. The Company’s primary validation of values is through the Company’s price validation function. Securities are classified within the fair value hierarchy after giving consideration to the activity level in the market for the security type and the observability of the inputs used to determine the fair value. For securities where a quoted market price may not be readily available, fair value is based upon quoted market prices for similar securities or using a fair value methodology that incorporates market observable assumptions. U.S. Treasury Securities The Company estimates the fair value of its U.S. Treasury securities based on quoted prices observed in active markets; as such, these investments are classified as level 1. Federal Agency Securities The Company includes in this classification securities issued by federal agencies and GSE s. Agency securities consist of debt obligations issued by HUD , FHLB , and other agencies, as well as securities collateralized by loans that are guaranteed by the SBA , and thus, are backed by the full faith and credit of the U.S. government. The Company estimates the fair value of federal agency securities based on pricing from observable trading activity for similar securities or from a third party pricing service; accordingly, these instruments are classified as level 2. U.S. States and Political Subdivisions The Company’s investments in U.S. states and political subdivisions (collectively “municipals”) include obligations of county and municipal authorities and agency bonds, which are general obligations of the municipality or are supported by a specified revenue source. Holdings are geographically dispersed, with no significant concentrations in any one state or municipality. Additionally, all AFS municipal obligations classified as level 2 are highly rated or are otherwise collateralized by securities backed by the full faith and credit of the federal government. MBS – Agency Agency MBS includes pass-through securities and collateralized mortgage obligations issued by GSE s and U.S. government agencies, such as Fannie Mae , Freddie Mac , and Ginnie Mae . Each security contains a guarantee by the issuing GSE or agency. For agency MBS , the Company estimates fair value based on pricing from observable trading activity for similar securities or from a third party pricing service; accordingly, the Company classified these instruments as level 2. MBS – Non-Agency Non-agency residential MBS includes purchased interests in third party securitizations, as well as retained interests in Company-sponsored securitizations of 2006 and 2007 vintage residential mortgages (including both prime jumbo fixed rate collateral and floating rate collateral). At the time of purchase or origination, these securities had high investment grade ratings; however, they have experienced deterioration in credit quality leading to downgrades to non-investment grade levels. The Company obtains pricing for these securities from an independent pricing service. The Company evaluates third party pricing to determine the reasonableness of the information relative to changes in market data, such as any recent trades, information received from market participants and analysts, and/or changes in the underlying collateral performance. At December 31, 2017 , the Company classified non-agency residential MBS as level 3. Non-agency commercial MBS consists of purchased interests in third party securitizations. These interests have high investment grade ratings, and the Company obtains pricing for these securities from an independent pricing service. The Company has classified these non-agency commercial MBS as level 2, as the third party pricing service relies on observable data for similar securities in active markets. Asset-Backed Securities ABS classified as securities AFS includes purchased interests in third party securitizations collateralized by home equity loans. At December 31, 2017 , the Company classified ABS as level 3. Corporate and Other Debt Securities Corporate debt securities are comprised predominantly of senior and subordinate debt obligations of domestic corporations and are classified as level 2. Other debt securities classified as AFS include bonds that are redeemable with the issuer at par. At December 31, 2018 and 2017 , the Company classified other debt securities AFS as level 2 and level 3, respectively. Commercial Paper The Company acquires CP that is generally short-term in nature (maturity of less than 30 days) and highly rated. The Company estimates the fair value of this CP based on observable pricing from executed trades of similar instruments; as such, CP is classified as level 2. Equity Securities The Company estimates the fair value of its equity securities classified as trading assets based on quoted prices observed in active markets; accordingly, these investments are classified as level 1. Derivative Instruments The Company holds derivative instruments for both trading and risk management purposes. Level 1 derivative instruments generally include exchange-traded futures or option contracts for which pricing is readily available. The Company’s level 2 instruments are predominantly OTC swaps, options, and forwards, measured using observable market assumptions for interest rates, foreign exchange, equity, and credit. Because fair values for OTC contracts are not readily available, the Company estimates fair values using internal, but standard, valuation models. The selection of valuation models is driven by the type of contract: for option-based products, the Company uses an appropriate option pricing model such as Black-Scholes. For forward-based products, the Company’s valuation methodology is generally a discounted cash flow approach. The Company’s derivative instruments classified as level 2 are primarily transacted in the institutional dealer market and priced with observable market assumptions at a mid-market valuation point, with appropriate valuation adjustments for liquidity and credit risk. See Note 19 , “Derivative Financial Instruments,” for additional information on the Company's derivative instruments. The Company’s derivative instruments classified as level 3 include IRLC s that satisfy the criteria to be treated as derivative financial instruments. The fair value of IRLC s on LHFS, while based on interest rates observable in the market, is highly dependent on the ultimate closing of the loans. These “pull-through” rates are based on the Company’s historical data and reflect the Company’s best estimate of the likelihood that a commitment will result in a closed loan. As pull-through rates increase, the fair value of IRLC s also increases. Servicing value is included in the fair value of IRLC s, and the fair value of servicing is determined by projecting cash flows, which are then discounted to estimate an expected fair value. The fair value of servicing is impacted by a variety of factors, including prepayment assumptions, discount rates, delinquency rates, contractually-specified servicing fees, servicing costs, and underlying portfolio characteristics. Because these inputs are not transparent in market trades, IRLC s are considered to be level 3 assets. During the years ended December 31, 2018 and 2017 , the Company transferred $63 million and $191 million , respectively, of net IRLC assets out of level 3 as the associated loans were closed. Trading Loans The Company engages in certain businesses whereby electing to measure loans at fair value for financial reporting aligns with the underlying business purpose. Specifically, loans included within this classification include trading loans that are (i) made or acquired in connection with the Company’s TRS business, (ii) part of the loan sales and trading business within the Company’s Wholesale segment, or (iii) backed by the SBA . See Note 12 , “Certain Transfers of Financial Assets and Variable Interest Entities,” and Note 19 , “Derivative Financial Instruments,” for further discussion of this business. All of these loans are classified as level 2 due to the nature of market data that the Company uses to estimate fair value. The loans made in connection with the Company’s TRS business are short-term, senior demand loans supported by a pledge agreement granting first priority security interest to the Bank in all the assets held by the borrower, a VIE with assets comprised primarily of corporate loans. While these TRS -related loans do not trade in the market, the Company believes that the par amount of the loans approximates fair value and no unobservable assumptions are used by the Company to value these loans. At December 31, 2018 and 2017 , the Company had $2.0 billion and $1.7 billion , respectively, of these short-term loans outstanding, measured at fair value. The loans from the Company’s sales and trading business are commercial and corporate leveraged loans that are either traded in the market or for which similar loans trade. The Company elected to measure these loans at fair value since they are actively traded. For each of the years ended December 31, 2018, 2017, and 2016 , the Company recognized an immaterial amount of gains/(losses) in the Consolidated Statements of Income due to changes in fair value attributable to instrument-specific credit risk. The Company is able to obtain fair value estimates for substantially all of these loans through a third party valuation service that is broadly used by market participants. While most of the loans are traded in the market, the Company does not believe that trading activity qualifies the loans as level 1 instruments, as the volume and level of trading activity is subject to variability and the loans are not exchange-traded. At December 31, 2018 and 2017 , $137 million and $48 million , respectively, of loans related to the Company’s trading business were held in inventory. SBA loans are similar to SBA securities discussed herein under “Federal agency securities,” except for their legal form. In both cases, the Company trades instruments that are fully guaranteed by the U.S. government as to contractual principal and interest and there is sufficient observable trading activity upon which to base the estimate of fair value. As these SBA loans are fully guaranteed, the changes in fair value are attributable to factors other than instrument-specific credit risk. At December 31, 2018 and 2017 , the Company held $366 million and $368 million of SBA loans in inventory, respectively. Loans Held for Sale and Loans Held for Investment Residential Mortgage LHFS The Company values certain newly-originated residential mortgage LHFS at fair value based upon defined product criteria. The Company chooses to fair value these residential mortgage LHFS to eliminate the complexities and inherent difficulties of achieving hedge accounting and to better align reported results with the underlying economic changes in value of the loans and related hedge instruments. Any origination fees are recognized within Mortgage related income in the Consolidated Statements of Income when earned at the time of closing. The servicing value is included in the fair value of the loan and is initially recognized at the time the Company enters into IRLC s with borrowers. The Company employs derivative instruments to economically hedge changes in interest rates and the related impact on servicing value in the fair value of the loan. The mark-to-market adjustments related to LHFS and the associated economic hedges are captured in Mortgage related income. LHFS classified as level 2 are primarily agency loans which trade in active secondary markets and are priced using current market pricing for similar securities, adjusted for servicing, interest rate risk, and credit risk. Non-agency residential mortgage LHFS are also included in level 2. For residential mortgages that the Company has elected to measure at fair value, the Company recognized an immaterial amount of gains/(losses) in the Consolidated Statements of Income due to changes in fair value attributable to borrower-specific credit risk for each of the years ended December 31, 2018, 2017, and 2016 . In addition to borrower-specific credit risk, there are other more significant variables that drive changes in the fair values of the loans, including interest rates and general market conditions. Commercial Mortgage LHFS The Company values certain commercial mortgage LHFS at fair value based upon observable current market prices for similar loans. These loans are generally transferred to agencies within 90 days of origination. The Company had commitments from agencies to purchase these loans at December 31, 2018 and 2017 ; therefore, they are classified as level 2. Origination fees are recognized within Commercial real estate related income in the Consolidated Statements of Income when earned at the time of closing. To mitigate the effect of interest rate risk inherent in entering into IRLCs with borrowers, the Company enters into forward contracts with investors at the same time that it enters into IRLCs with borrowers. The mark-to-market adjustments related to commercial mortgage LHFS, IRLCs, and forward contracts are recognized in Commercial real estate related income. For commercial mortgages that the Company has elected to measure at fair value, the Company recognized no gains/(losses) in the Consolidated Statements of Income due to changes in fair value attributable to borrower-specific credit risk for each of the years ended December 31, 2018, 2017, and 2016 . LHFI LHFI classified as level 3 includes predominantly mortgage loans that are not marketable, largely due to the identification of loan defects. The Company chooses to measure these mortgage LHFI at fair value to better align reported results with the underlying economic changes in value of the loans and any related hedging instruments. The Company values these loans using a discounted cash flow approach based on assumptions that are generally not observable in current markets, such as prepayment speeds, default rates, loss severity rates, and discount rates. Level 3 LHFI also includes mortgage loans that are valued using collateral based pricing. Changes in the applicable housing price index since the time of the loan origination are considered and applied to the loan’s collateral value. An additional discount representing the return that a buyer would require is also considered in the overall fair value. Residential Mortgage Servicing Rights The Company records residential MSR assets at fair value using a discounted cash flow approach. The fair values of residential MSRs are impacted by a variety of factors, including prepayment assumptions, discount rates, delinquency rates, contractually-specified servicing fees, servicing costs, and underlying portfolio characteristics. The underlying assumptions and estimated values are corroborated by values received from independent third parties based on their review of the servicing portfolio, and comparisons to market transactions. Because these inputs are not transparent in market trades, residential MSRs are classified as level 3 assets. For additional information see Note 10 , “Goodwill and Other Intangible Assets.” Other Assets The Company estimates the fair value of its mutual fund investments and other equity securities with readily determinable fair values based on quoted prices observed in active markets; therefore, these investments are classified as level 1. During the second quarter of 2018, the Company reclassified $22 million of nonmarketable equity securities to marketable equity securities due to newly available, readily determinable fair value information observed in active markets. Liabilities Trading Liabilities and Derivative Instruments Trading liabilities are comprised primarily of derivative contracts, including IRLC s that satisfy the criteria to be treated as derivative financial instruments, as well as various contracts (primarily U.S. Treasury securities, corporate and other debt securities) that the Company uses in certain of its trading businesses. The Company's valuation methodologies for these derivative contracts and securities are consistent with those discussed within the corresponding sections herein under “ Trading Assets and Derivative Instruments and Investment Securities .” During the second quarter of 2009, in connection with its sale of Visa Class B shares , the Company entered into a derivative contract whereby the ultimate cash payments received or paid, if any, under the contract are based on the ultimate resolution of the Litigation involving Visa . The fair value of the derivative is estimated based on the Company’s expectations regarding the ultimate resolution of that Litigation. The significant unobservable inputs used in the fair value measurement of the derivative involve a high degree of judgment and subjectivity; accordingly, the derivative liability is classified as level 3. See Note 18 , “Guarantees,” for a discussion of the valuation assumptions. Brokered Time Deposits The Company has elected to measure certain CD s that contain embedded derivatives at fair value. This fair value election better aligns the economics of the CD s with the Company’s risk management strategies. The Company evaluated, on an instrument by instrument basis, whether a new issuance would be measured at fair value. The Company has classified CD s measured at fair value as level 2 instruments due to the Company's ability to reasonably measure all significant inputs based on observable market variables. The Company employs a discounted cash flow approach based on observable market interest rates for the term of the CD and an estimate of the Bank’s credit risk. For any embedded derivative features, the Company uses the same valuation meth

Contingencies

Contingencies	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Contingencies	NOTE 21 – CONTINGENCIES Litigation and Regulatory Matters In the ordinary course of business, the Company and its subsidiaries are parties to numerous civil claims and lawsuits and subject to regulatory examinations, investigations, and requests for information. Some of these matters involve claims for substantial amounts. The Company’s experience has shown that the damages alleged by plaintiffs or claimants are often overstated, based on unsubstantiated legal theories, unsupported by facts, and/or bear no relation to the ultimate award that a court might grant. Additionally, the outcome of litigation and regulatory matters and the timing of ultimate resolution are inherently difficult to predict. These factors make it difficult for the Company to provide a meaningful estimate of the range of reasonably possible outcomes of claims in the aggregate or by individual claim. However, on a case-by-case basis, reserves are established for those legal claims in which it is probable that a loss will be incurred and the amount of such loss can be reasonably estimated. The Company's financial statements at December 31, 2018 reflect the Company's current best estimate of probable losses associated with these matters, including costs to comply with various settlement agreements, where applicable. The actual costs of resolving these claims may be substantially higher or lower than the amounts reserved. For a limited number of legal matters in which the Company is involved, the Company is able to estimate a range of reasonably possible losses in excess of related reserves, if any. Management currently estimates these losses to range from $0 to approximately $150 million . This estimated range of reasonably possible losses represents the estimated possible losses over the life of such legal matters, which may span a currently indeterminable number of years, and is based on information available at December 31, 2018 . The matters underlying the estimated range will change from time to time, and actual results may vary significantly from this estimate. Those matters for which an estimate is not possible are not included within this estimated range; therefore, this estimated range does not represent the Company’s maximum loss exposure. Based on current knowledge, it is the opinion of management that liabilities arising from legal claims in excess of the amounts currently reserved, if any, will not have a material impact on the Company’s financial condition, results of operations, or cash flows. However, in light of the significant uncertainties involved in these matters and the large or indeterminate damages sought in some of these matters, an adverse outcome in one or more of these matters could be material to the Company’s financial condition, results of operations, or cash flows for any given reporting period. The following is a description of certain litigation and regulatory matters: Card Association Antitrust Litigation The Company is a defendant, along with Visa and Mastercard , as well as several other banks, in several antitrust lawsuits challenging their practices. For a discussion regarding the Company’s involvement in this litigation matter, see Note 18 , “Guarantees.” Bickerstaff v. SunTrust Bank This case was filed in the Fulton County State Court on July 12, 2010, and an amended complaint was filed on August 9, 2010. Plaintiff asserts that all overdraft fees charged to his account which related to debit card and ATM transactions are actually interest charges and therefore subject to the usury laws of Georgia. Plaintiff has brought claims for violations of civil and criminal usury laws, conversion, and money had and received, and purports to bring the action on behalf of all Georgia citizens who incurred such overdraft fees within the four years before the complaint was filed where the overdraft fee resulted in an interest rate being charged in excess of the usury rate. On April 8, 2013, the plaintiff filed a motion for class certification and that motion was denied but the ruling was later reversed and remanded by the Georgia Supreme Court. On October 6, 2017, the trial court granted plaintiff's motion for class certification and the Bank filed an appeal of the decision on November 3, 2017. Mutual Funds ERISA Class Action On March 11, 2011, the Company and certain officers, directors, and employees of the Company were named in a putative class action alleging that they breached their fiduciary duties under ERISA by offering certain STI Classic Mutual Funds as investment options in the Plan. The plaintiffs purport to represent all current and former Plan participants who held the STI Classic Mutual Funds in their Plan accounts from April 2002 through December 2010 and seek to recover alleged losses these Plan participants supposedly incurred as a result of their investment in the STI Classic Mutual Funds. This action is pending in the U.S. District Court for the Northern District of Georgia, Atlanta Division (the “District Court”). Subsequently, plaintiffs' counsel initiated a substantially similar lawsuit against the Company naming two new plaintiffs. On June 27, 2014, Brown, et al. v. SunTrust Banks, Inc., et al., another putative class action alleging breach of fiduciary duties associated with the inclusion of STI Classic Mutual Funds as investment options in the Plan, was filed in the U.S. District Court for the District of Columbia but then was transferred to the District Court. After various appeals, the cases were remanded to the District Court. On March 25, 2016, a consolidated amended complaint was filed, consolidating all of these pending actions into one case . The Company filed an answer to the consolidated amended complaint on June 6, 2016. Subsequent to the closing of fact discovery, plaintiffs filed their second amended consolidated complaint on December 19, 2017 which among other things named five new defendants. On January 2, 2018, defendants filed their answer to the second amended consolidated complaint. Defendants' motion for partial summary judgment was filed on January 12, 2018, and on January 16, 2018 the plaintiffs filed for motion for class certification. Defendants' motion for partial summary judgment was granted by the District Court on May 2, 2018, which held that all claims prior to March 11, 2005 have been dismissed as well as dismissing three individual defendants from action. On June 27, 2018, the District Court granted the plaintiffs' motion for class certification. An additional motion for partial summary judgment was filed by defendants on October 5, 2018. Intellectual Ventures II v. SunTrust Banks, Inc. and SunTrust Bank This action was filed in the U.S. District Court for the Northern District of Georgia on July 24, 2013. Plaintiff alleged that SunTrust violated five patents held by plaintiff in connection with SunTrust’s provision of online banking services and other systems and services. Plaintiff seeks damages for alleged patent infringement of an unspecified amount, as well as attorney’s fees and expenses. The matter was stayed on October 7, 2014 pending inter partes reviews of a number of the claims asserted against SunTrust. After completion of those reviews, plaintiff dismissed its claims regarding four of the five patents on August 1, 2017. LR Trust v. SunTrust Banks, Inc., et al. In November 2016, the Company and certain officers and directors were named as defendants in a shareholder derivative action alleging that defendants failed to take action related to activities at issue in the National Mortgage Servicing, HAMP , and FHA Originations settlements, and certain other legal matters or to ensure that the alleged activities in each were remedied and otherwise appropriately addressed. Plaintiff sought an award in favor of the Company for the amount of damages sustained by the Company, disgorgement of alleged benefits obtained by defendants, and enhancements to corporate governance and internal controls. On September 18, 2017, the district court dismissed this matter and on October 16, 2017, plaintiff filed an appeal. A settlement of the matter was reached in which the defendants agreed to pay $585,000 and the Company committed to certain non-monetary corporate governance activities through March 2021. Final approval of the settlement was granted by the district court on November 28, 2018. Millennium Lender Claim Trust v. STRH and SunTrust Bank, et al. In August 2017, the Trustee of the Millennium Lender Claim Trust filed a suit in the New York State Court against STRH

Business Segment Reporting

Business Segment Reporting	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Business Segment Reporting	NOTE 22 - BUSINESS SEGMENT REPORTING The Company operates and measures business activity across two segments: Consumer and Wholesale , with functional activities included in Corporate Other . The Company's business segment structure is based on the manner in which financial information is evaluated by management as well as the products and services provided or the type of client served. In the second quarter of 2018, certain business banking clients within Commercial Banking were transferred from the Wholesale segment to the Consumer segment to create greater consistency in delivering tailored solutions to business banking clients through the alignment of client coverage and client service in branches. Prior period business segment results were revised to conform with this updated business segment structure. Additionally, the transfer resulted in a reallocation of goodwill from Wholesale to Consumer, as disclosed in Note 10 , "Goodwill and Other Intangible Assets." The following is a description of the segments and their primary businesses at December 31, 2018 . The Consumer segment is made up of four primary businesses: • Consumer Banking provides services to individual consumers and business banking clients through an extensive network of traditional and in-store branches, ATM s, online banking ( www.suntrust.com ), mobile banking, and by telephone (1-800-SUNTRUST). Financial products and services offered to consumers and small business clients include deposits and payments, loans, and various fee-based services. Consumer Banking also serves as an entry point for clients and provides services for other businesses. • Consumer Lending offers an array of lending products to individual consumers and business banking clients via the Company's Consumer Banking and PWM businesses, through the internet ( www.suntrust.com and www.lightstream.com ), as well as through various national offices and partnerships. Products offered include home equity lines, personal credit lines and loans, direct auto, indirect auto, student lending, credit cards, and other lending products. • PWM provides a full array of wealth management products and professional services to individual consumers and institutional clients, including loans, deposits, brokerage, professional investment advisory, and trust services to clients seeking active management of their financial resources. Institutional clients are served by the Institutional Investment Solutions business. Discount/online and full-service brokerage products are offered to individual clients through STIS . Investment advisory products and services are offered to clients by STAS , an SEC registered investment advisor. PWM also includes GFO Advisory Services, LLC, which provides family office solutions to clients and their families to help them manage and sustain wealth across multiple generations, including family meeting facilitation, consolidated reporting, expense management, specialty asset management, and business transition advice, as well as other wealth management disciplines. • Mortgage Banking offers residential mortgage products nationally through its retail and correspondent channels, the internet ( www.suntrust.com ), and by telephone (1-800-SUNTRUST). These products are either sold in the secondary market, primarily with servicing rights retained, or held in the Company’s loan portfolio. Mortgage Banking also services loans for other investors, in addition to loans held in the Company’s loan portfolio. ◦ The Company successfully merged its STM and Bank legal entities in the third quarter of 2018. Subsequent to the merger, mortgage operations have continued under the Bank’s charter . This merger simplified the Company's organizational structure, allowing it to more fully serve the needs of clients. There were no material financial impacts associated with the merger, other than the tax impacts described in Note 16 , “Income Taxes.” The Wholesale segment is made up of three primary businesses and the Treasury & Payment Solutions product group: • CIB delivers comprehensive capital markets solutions, including advisory, capital raising, and financial risk management, with the goal of serving the needs of both public and private companies in the Wholesale segment and PWM business. Investment Banking and Corporate Banking teams within CIB serve clients across the nation, offering a full suite of traditional banking and investment banking products and services to companies with annual revenues typically greater than $150 million. Investment Banking serves select industry segments including consumer and retail, energy, technology, financial services, healthcare, industrials, and media and communications. Corporate Banking serves clients across diversified industry sectors based on size, complexity, and frequency of capital markets issuance. CIB also includes the Company's Asset Finance Group, which offers a full complement of asset-based financing solutions such as securitizations, asset-based lending, equipment financing, and structured real estate arrangements. • Commercial Banking offers an array of traditional banking products, including lending, cash management, and investment banking solutions via CIB , to commercial clients (generally clients with revenues between $5 million and $250 million), including not-for-profit organizations, governmental entities, healthcare and aging services, and auto dealer financing (floor plan inventory financing). Local teams deliver these solutions along with the Company's industry expertise to commercial clients to help them achieve smart growth. • Commercial Real Estate provides a range of credit and deposit services as well as fee-based product offerings on a regional delivery basis to privately held developers, operators, and investors in commercial real estate properties through its National Banking Division. Commercial Real Estate also provides multi-family agency lending and servicing, advisory, and commercial mortgage brokerage services via its Agency Lending division. Additionally, Commercial Real Estate offers tailored financing and equity investment solutions for community development and affordable housing projects through STCC , with particular expertise in Low Income Housing Tax Credits and New Market Tax Credits. Real Estate Corporate and Investment Banking targets relationships with REIT s and homebuilders, both publicly-traded and privately owned. The Investor Services Group offers loan administration, special servicing, valuation, and advisory services to third party clients. • Treasury & Payment Solutions provides business clients in the Wholesale segment with services required to manage their payments and receipts, combined with the ability to manage and optimize their deposits across all aspects of their business. Treasury & Payment Solutions operates all electronic and paper payment types, including card, wire transfer, ACH , check, and cash. It also provides clients the means to manage their accounts electronically online, both domestically and internationally. Corporate Other includes management of the Company’s investment securities portfolio, long-term debt, end user derivative instruments, short-term liquidity and funding activities, balance sheet risk management, and most real estate assets, as well as the Company's functional activities such as marketing, finance, enterprise risk, legal, enterprise information services, and executive management, among others. Additionally, for all periods prior to January 1, 2018, the results of PAC were reported in the Wholesale segment and were reclassified to Corporate Other for enhanced comparability of the Wholesale segment results excluding PAC . See Note 3 , "Acquisitions/Dispositions," for additional information related to the sale of PAC in December 2017. Because business segment results are presented based on management accounting practices, the transition to the consolidated results prepared under U.S. GAAP creates certain differences, which are reflected in reconciling items. Business segment reporting conventions are described below. • Net interest income-FTE – is reconciled from Net interest income and is grossed-up on an FTE basis to make income from tax-exempt assets comparable to other taxable products. Segment results reflect matched maturity funds transfer pricing, which ascribes credits or charges based on the economic value or cost created by assets and liabilities of each segment. Differences between these credits and charges are captured as reconciling items. • Provision for credit losses – represents net charge-offs by segment combined with an allocation to the segments for the provision attributable to each segment's quarterly change in the ALLL and unfunded commitments reserve balances. • Noninterest income – includes federal and state tax credits that are grossed-up on a pre-tax equivalent basis, related primarily to certain community development investments. • Provision for income taxes-FTE – is calculated using a blended income tax rate for each segment and includes reversals of the tax adjustments and credits described above. The difference between the calculated provision for income taxes at the segment level and the consolidated provision for income taxes is reported as reconciling items. The segment’s financial performance is comprised of direct financial results and allocations for various corporate functions that provide management an enhanced view of the segment’s financial performance. Internal allocations include the following: • Operational costs – expenses are charged to segments based on an activity-based costing process, which also allocates residual expenses to the segments. Generally, recoveries of these costs are reported in Corporate Other. • Support and overhead costs – expenses not directly attributable to a specific segment are allocated based on various drivers (number of equivalent employees, number of PCs/laptops, net revenue, etc.). Recoveries for these allocations are reported in Corporate Other. The application and development of management reporting methodologies is an active process and undergoes periodic enhancements. The implementation of these enhancements to the internal management reporting methodology may materially affect the results disclosed for each segment, with no impact on consolidated results. If significant changes to management reporting methodologies take place, the impact of these changes is quantified and prior period information is revised, when practicable. Year Ended December 31, 2018 (Dollars in millions) Consumer Wholesale Corporate Other Reconciling Consolidated Balance Sheets: Average LHFI $75,427 $70,200 $89 ($2 ) $145,714 Average consumer and commercial deposits 111,235 48,675 216 (358 ) 159,768 Average total assets 85,509 84,413 35,630 1,725 207,277 Average total liabilities 112,173 55,098 16,100 (304 ) 183,067 Average total equity — — — 24,210 24,210 Statements of Income: Net interest income $4,235 $2,184 ($190 ) ($242 ) $5,987 FTE adjustment — 86 2 — 88 Net interest income-FTE 1 4,235 2,270 (188 ) (242 ) 6,075 Provision for credit losses 2 148 60 — — 208 Net interest income after provision for credit losses-FTE 4,087 2,210 (188 ) (242 ) 5,867 Total noninterest income 1,804 1,534 57 (169 ) 3,226 Total noninterest expense 4,017 1,720 (42 ) (22 ) 5,673 Income before provision for income taxes-FTE 1,874 2,024 (89 ) (389 ) 3,420 Provision for income taxes-FTE 3 424 479 (61 ) (206 ) 636 Net income including income attributable to noncontrolling interest 1,450 1,545 (28 ) (183 ) 2,784 Less: Net income attributable to noncontrolling interest — — 9 — 9 Net income $1,450 $1,545 ($37 ) ($183 ) $2,775 1 Presented on a matched maturity funds transfer price basis for the segments. 2 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. 3 Includes regular provision for income taxes as well as FTE income and tax credit adjustment reversals. Year Ended December 31, 2017 1, 2 (Dollars in millions) Consumer Wholesale Corporate Other Reconciling Consolidated Balance Sheets: Average LHFI $73,578 $69,394 $1,247 ($3 ) $144,216 Average consumer and commercial deposits 109,298 50,155 160 (64 ) 159,549 Average total assets 83,278 83,091 35,931 2,631 204,931 Average total liabilities 110,271 55,762 14,626 (29 ) 180,630 Average total equity — — — 24,301 24,301 Statements of Income: Net interest income $3,906 $2,029 $14 ($316 ) $5,633 FTE adjustment — 142 3 — 145 Net interest income-FTE 3 3,906 2,171 17 (316 ) 5,778 Provision for credit losses 4 366 39 4 — 409 Net interest income after provision for credit losses-FTE 3,540 2,132 13 (316 ) 5,369 Total noninterest income 1,905 1,573 73 (197 ) 3,354 Total noninterest expense 3,982 1,727 74 (19 ) 5,764 Income before provision for income taxes-FTE 1,463 1,978 12 (494 ) 2,959 Provision for income taxes-FTE 5 529 736 (292 ) (296 ) 677 Net income including income attributable to noncontrolling interest 934 1,242 304 (198 ) 2,282 Less: Net income attributable to noncontrolling interest — — 9 — 9 Net income $934 $1,242 $295 ($198 ) $2,273 1 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. 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 Presented on a matched maturity funds transfer price basis for the segments. 4 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. 5 Includes regular provision for income taxes as well as FTE income and tax credit adjustment reversals. Year Ended December 31, 2016 1, 2 (Dollars in millions) Consumer Wholesale Corporate Other Reconciling Consolidated Balance Sheets: Average LHFI $70,455 $69,287 $1,379 ($3 ) $141,118 Average consumer and commercial deposits 105,365 48,782 115 (73 ) 154,189 Average total assets 79,971 83,168 33,425 2,440 199,004 Average total liabilities 106,374 54,457 14,179 (74 ) 174,936 Average total equity — — — 24,068 24,068 Statements of Income: Net interest income $3,636 $1,812 $160 ($387 ) $5,221 FTE adjustment — 136 2 — 138 Net interest income-FTE 3 3,636 1,948 162 (387 ) 5,359 Provision for credit losses 4 159 282 3 — 444 Net interest income after provision for credit losses-FTE 3,477 1,666 159 (387 ) 4,915 Total noninterest income 2,067 1,325 137 (146 ) 3,383 Total noninterest expense 3,938 1,507 38 (15 ) 5,468 Income before provision for income taxes-FTE 1,606 1,484 258 (518 ) 2,830 Provision for income taxes-FTE 5 592 555 70 (274 ) 943 Net income including income attributable to noncontrolling interest 1,014 929 188 (244 ) 1,887 Less: Net income attributable to noncontrolling interest — — 9 — 9 Net income $1,014 $929 $179 ($244 ) $1,878 1 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. 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 Presented on a matched maturity funds transfer price basis for the segments. 4 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. 5

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	12 Months Ended
	Dec. 31, 2018
Accumulated Other Comprehensive Income	NOTE 23 - ACCUMULATED OTHER COMPREHENSIVE LOSS Changes in the components of AOCI, net of tax, are presented in the following table: (Dollars in millions) Securities AFS Derivative Instruments Brokered Time Deposits Long-Term Debt Employee Benefit Plans Total Year Ended December 31, 2018 Balance, beginning of period ($1 ) ($244 ) ($1 ) ($4 ) ($570 ) ($820 ) Cumulative effect adjustment related to ASU adoption 1 30 (56 ) — (1 ) (127 ) (154 ) Net unrealized (losses)/gains arising during the period (385 ) (123 ) 2 4 (56 ) (558 ) Amounts reclassified to net income (1 ) 55 — — 58 112 Other comprehensive (loss)/income, net of tax (386 ) (68 ) 2 4 2 (446 ) Balance, end of period ($357 ) ($368 ) $1 ($1 ) ($695 ) ($1,420 ) Year Ended December 31, 2017 Balance, beginning of period ($62 ) ($157 ) ($1 ) ($7 ) ($594 ) ($821 ) Net unrealized (losses)/gains arising during the period (7 ) (31 ) — 3 11 (24 ) Amounts reclassified to net income 68 (56 ) — — 13 25 Other comprehensive income/(loss), net of tax 61 (87 ) — 3 24 1 Balance, end of period ($1 ) ($244 ) ($1 ) ($4 ) ($570 ) ($820 ) Year Ended December 31, 2016 Balance, beginning of period $135 $87 $— $— ($682 ) ($460 ) Cumulative credit risk adjustment 2 — — — (5 ) — (5 ) Net unrealized (losses)/gains arising during the period (194 ) (91 ) (1 ) (2 ) 76 (212 ) Amounts reclassified to net income (3 ) (153 ) — — 12 (144 ) Other comprehensive (loss)/income, net of tax (197 ) (244 ) (1 ) (2 ) 88 (356 ) Balance, end of period ($62 ) ($157 ) ($1 ) ($7 ) ($594 ) ($821 ) 1 Related to the Company's early adoption of ASU 2018-02 beginning January 1, 2018. See Note 1 , "Significant Accounting Policies," for additional information. 2 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," for additional information. Reclassifications from AOCI to Net income, and the related tax effects, are presented in the following table: (Dollars in millions) Year Ended December 31 Impacted Line Item in the Consolidated Statements of Income Details About AOCI Components 2018 2017 2016 Securities AFS: Net realized (gains)/losses on securities AFS ($1 ) $108 ($4 ) Net securities gains/(losses) Tax effect — (40 ) 1 Provision for income taxes (1 ) 68 (3 ) Derivative Instruments: Net realized losses/(gains) on cash flow hedges 72 (89 ) (244 ) Interest and fees on loans held for investment Tax effect (17 ) 33 91 Provision for income taxes 55 (56 ) (153 ) Employee Benefit Plans: Amortization of prior service credit (6 ) (6 ) (6 ) Employee benefits Amortization of actuarial loss 22 25 25 Employee benefits Deferred losses related to NCF Retirement Plan settlement 1 60 — — Employee benefits 76 19 19 Tax effect (18 ) (6 ) (7 ) Provision for income taxes 58 13 12 Total reclassifications from AOCI to net income $112 $25 ($144 ) 1 Related to the Company's NCF Retirement Plan settlement in the fourth quarter of 2018. See Note 17

SunTrust Banks, Inc. (Parent Co

SunTrust Banks, Inc. (Parent Company Only) Financial Information	12 Months Ended
	Dec. 31, 2018
Condensed Financial Information of Parent Company Only Disclosure [Text Block]	NOTE 24 - PARENT COMPANY FINANCIAL INFORMATION Statements of Income - Parent Company Only Year Ended December 31 (Dollars in millions) 2018 2017 2016 Income Dividends 1 $2,380 $1,414 $1,300 Interest from loans to subsidiaries 30 25 15 Interest from deposits at banks 25 22 12 Other income 34 5 2 Total income 2,469 1,466 1,329 Expense Interest on short-term borrowings 6 4 2 Interest on long-term debt 161 137 140 Employee compensation and benefits 2 40 103 57 Service fees to subsidiaries 9 12 12 Other expense 19 33 24 Total expense 235 289 235 Income before income tax benefit and equity in undistributed income of subsidiaries 2,234 1,177 1,094 Income tax benefit 20 72 59 Income before equity in undistributed income of subsidiaries 2,254 1,249 1,153 Equity in undistributed income of subsidiaries 521 1,024 725 Net income $2,775 $2,273 $1,878 Total other comprehensive (loss)/income, net of tax (446 ) 1 (356 ) Total comprehensive income $2,329 $2,274 $1,522 1 Substantially all dividend income is from subsidiaries (primarily the Bank). 2 December 31 (Dollars in millions) 2018 2017 Assets Cash held at SunTrust Bank $599 $701 Interest-bearing deposits held at SunTrust Bank 913 2,144 Interest-bearing deposits held at other banks 24 24 Cash and cash equivalents 1,536 2,869 Trading assets and derivative instruments 12 — Securities available for sale 98 123 Loans to subsidiaries 1,261 1,218 Investment in capital stock of subsidiaries stated on the basis of the Company’s equity in subsidiaries’ capital accounts: Banking subsidiaries 24,630 24,590 Nonbanking subsidiaries 1,457 1,423 Goodwill 211 211 Other assets 686 547 Total assets $29,891 $30,981 Liabilities Short-term borrowings: Subsidiaries $5 $205 Non-affiliated companies 354 350 Long-term debt: Non-affiliated companies 4,536 4,466 Other liabilities 819 909 Total liabilities 5,714 5,930 Shareholders’ Equity Preferred stock 2,025 2,475 Common stock 553 550 Additional paid-in capital 9,022 9,000 Retained earnings 19,522 17,540 Treasury stock, at cost, and other (5,525 ) (3,694 ) Accumulated other comprehensive loss, net of tax (1,420 ) (820 ) Total shareholders’ equity 24,177 25,051 Total liabilities and shareholders’ equity $29,891 $30,981 Statements of Cash Flows - Parent Company Only Year Ended December 31 (Dollars in millions) 2018 2017 2016 Cash Flows from Operating Activities: Net income $2,775 $2,273 $1,878 Adjustments to reconcile net income to net cash (used in)/provided by operating activities: Equity in undistributed income of subsidiaries (521 ) (1,024 ) (725 ) Depreciation, amortization, and accretion 3 5 3 Deferred income tax expense 8 5 11 Stock-based compensation — — 3 Net securities (gains)/losses — (1 ) — Net increase in other assets (158 ) (15 ) (129 ) Net increase in other liabilities 26 122 62 Net cash provided by operating activities 2,133 1,365 1,103 Cash Flows from Investing Activities: Proceeds from maturities, calls, and paydowns of securities available for sale 23 38 49 Proceeds from sales of securities available for sale — 1 4 Purchases of securities available for sale — (17 ) (4 ) Net (increase)/decrease in loans to subsidiaries (43 ) 1,298 (889 ) Other, net (1 ) — (3 ) Net cash (used in)/provided by investing activities (21 ) 1,320 (843 ) Cash Flows from Financing Activities: Net (decrease)/increase in short-term borrowings (196 ) (211 ) 5 Proceeds from issuance of long-term debt 929 9 2,005 Repayments of long-term debt (873 ) (482 ) (1,784 ) Proceeds from issuance of preferred stock — 1,239 — Repurchase of preferred stock (450 ) — — Repurchase of common stock (1,910 ) (1,314 ) (806 ) Repurchase of common stock warrants — — (24 ) Common and preferred stock dividends paid (936 ) (723 ) (564 ) Taxes paid related to net share settlement of equity awards (45 ) (39 ) (48 ) Proceeds from exercise of stock options 36 21 25 Net cash used in financing activities (3,445 ) (1,500 ) (1,191 ) Net (decrease)/increase in cash and cash equivalents (1,333 ) 1,185 (931 ) Cash and cash equivalents at beginning of period 2,869 1,684 2,615 Cash and cash equivalents at end of period $1,536 $2,869 $1,684 Supplemental Disclosures: Income taxes received from/(paid to) subsidiaries $101 ($489 ) ($886 ) Income taxes (paid)/received by Parent Company (105 ) 414 812 Net income taxes paid by Parent Company ($4 ) ($75 ) ($74 ) Interest paid $164 $140 $135

Subsequent Event (Notes)

Subsequent Event (Notes)	12 Months Ended
	Dec. 31, 2018
Subsequent Events [Abstract]
Subsequent Events [Text Block]	NOTE 25 - SUBSEQUENT EVENT On February 7, 2019, the Company and BB&T Corporation (“ BB&T ”) announced that both companies' boards of directors approved a definitive agreement to combine in an all-stock Merger. Under the terms of the Agreement and Plan of Merger (the “ Merger Agreement ”), the Company's shareholders will have the right to receive 1.295 shares of BB&T common stock for each share of the Company's common stock. A new corporate headquarters for the combined company will be established in Charlotte, North Carolina, and it will operate under a new name and brand, while the combined company's board of directors and executive management team will be evenly split between the Company and BB&T . The Merger is expected to expand capabilities and accelerate capacity to invest in transformational technologies for clients, combine complementary business models to create a diverse and comprehensive business mix with leading market share positions, and deliver organizational and other merger-related synergies, while also being accretive to the combined company's profitability profile. The Company's Merger with BB&T is expected to close late in the third quarter of 2019 or in the fourth quarter of 2019, subject to satisfaction of customary closing conditions, including receipt of regulatory approvals and approval by the shareholders of each company. For more information on the proposed Merger with BB&T , see Part I, Item 1 , “Business,” in this

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Accounting Policies Recently Adopted and Pending Accounting Pronouncements	Accounting Pronouncements The following table summarizes ASU s issued by the FASB that were adopted during the year ended December 31, 2018 or not yet adopted as of December 31, 2018 , that could have a material effect on the Company's financial statements: Standard Description Required Date of Adoption Effect on the Financial Statements or Other Significant Matters Standards Adopted in 2018 ASU 2014-09, Revenue from Contracts with Customers (ASC Topic 606) and subsequent related ASUs These ASUs comprise ASC Topic 606, Revenue from Contracts with Customers , which supersede the revenue recognition requirements in ASC Topic 605, Revenue Recognition, and most industry-specific guidance throughout the Industry Topics of the ASC. The core principle of these ASUs is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. January 1, 2018 The Company adopted these ASUs on a modified retrospective basis beginning January 1, 2018. Upon adoption, the Company recognized an immaterial cumulative effect adjustment that resulted in a decrease to the beginning balance of retained earnings as of January 1, 2018. Furthermore, the Company prospectively changed the presentation of certain types of revenue and expenses, such as underwriting revenue within investment banking income which is shown on a gross basis, and certain cash promotions and card network expenses, which were reclassified from noninterest expense to service charges on deposit accounts, card fees, and other charges and fees. The net quantitative impact of these presentation changes decreased both revenue and expenses by $26 million for the year ended December 31, 2018; however, these presentation changes did not have an impact on net income. Prior period balances have not been restated to reflect these presentation changes. See Note 2, “Revenue Recognition,” for disclosures relating to ASC Topic 606. ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities; and ASU 2018-03, Technical Corrections and Improvements to Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities These ASUs amend ASC Topic 825, Financial Instruments-Overall , and address certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. The main provisions require most investments in equity securities to be measured at fair value through net income, unless they qualify for a measurement alternative, and require fair value changes arising from changes in instrument-specific credit risk for financial liabilities that are measured under the fair value option to be recognized in other comprehensive income. With the exception of disclosure requirements and the application of the measurement alternative for certain equity investments that were applied prospectively, these ASUs were required to be applied on a modified retrospective basis. January 1, 2018 Early adoption was permitted for the provision related to changes in instrument-specific credit risk for financial liabilities under the FVO. The Company early adopted the provision related to changes in instrument-specific credit risk beginning January 1, 2016, which resulted in an immaterial cumulative effect adjustment from retained earnings to AOCI. See Note 1, “Significant Accounting Policies,” to the Company’s 2016 Annual Report on Form 10-K for additional information regarding the early adoption of this provision. Additionally, the Company adopted the remaining provisions of these ASUs beginning January 1, 2018, which resulted in an immaterial cumulative effect adjustment to the beginning balance of retained earnings. In connection with the adoption of these ASUs, an immaterial amount of equity securities previously classified as securities AFS were reclassified to other assets, as the AFS classification is no longer permitted for equity securities under these ASUs. Subsequent to adoption of these ASUs, the Company recognized net gains on certain of its equity investments during the year ended December 31, 2018. For additional information relating to these net gains, see Note 11, “Other Assets,” and Note 20, “Fair Value Election and Measurement.” The remaining provisions and disclosure requirements of these ASUs did not have a material impact on the Company’s Consolidated Financial Statements or related disclosures upon adoption. Standard Description Required Date of Adoption Effect on the Financial Statements or Other Significant Matters Standards Adopted in 2018 (continued) ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments This ASU amends ASC Topic 230, Statement of Cash Flows , to clarify the classification of certain cash receipts and payments within the Company's Consolidated Statements of Cash Flows. These items include: cash payments for debt prepayment or debt extinguishment costs; cash outflows for the settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant; contingent consideration payments made after a business combination; proceeds from the settlement of insurance claims; proceeds from the settlement of corporate-owned and bank-owned life insurance policies; distributions received from equity method investees; and beneficial interests acquired in securitization transactions. The ASU also clarifies that when no specific U.S. GAAP guidance exists and the source of the cash flows are not separately identifiable, the predominant source of cash flow should be used to determine the classification for the item. The ASU must be applied on a retrospective basis. January 1, 2018 The Company adopted this ASU on a retrospective basis effective January 1, 2018 and changed the presentation of certain cash payments and receipts within its Consolidated Statements of Cash Flows. Specifically, the Company changed the presentation of proceeds from the settlement of bank-owned life insurance policies from operating activities to investing activities. The Company also changed the presentation of cash payments for bank-owned life insurance policy premiums from operating activities to investing activities. Lastly, for contingent consideration payments made more than three months after a business combination, the Company changed the presentation for the portion of the cash payment up to the acquisition date fair value of the contingent consideration as a financing activity and any amount paid in excess of the acquisition date fair value as an operating activity. For the years ended December 31, 2018, 2017, and 2016, the Company reclassified $202 million, $127 million, and $202 million, respectively, of cash payments for bank-owned life insurance policy premiums, as well as $14 million, $3 million, and $17 million, respectively, of proceeds from the settlement of bank-owned life insurance policies from operating activities to investing activities on the Company’s Consolidated Statements of Cash Flows. For the year ended December 31, 2016, the Company reclassified $13 million from investing activities to financing activities and $10 million from investing activities to operating activities related to contingent consideration payments. There were no contingent consideration payments made for the years ended December 31, 2018 and 2017. ASU 2017-09, Stock Compensation (Topic 718): Scope of Modification Accounting This ASU amends ASC Topic 718, Stock Compensation , to provide guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting per ASC Topic 718, Stock Compensation . The amendments clarify that modification accounting only applies to an entity if the fair value, vesting conditions, or classification of the award changes as a result of changes in the terms or conditions of a share-based payment award. The ASU should be applied prospectively to awards modified on or after the adoption date. January 1, 2018 The Company adopted this ASU on January 1, 2018 and upon adoption, the ASU did not have a material impact on the Company’s Consolidated Financial Statements or related disclosures. ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities This ASU amends ASC Topic 815, Derivatives and Hedging, to simplify the requirements for hedge accounting. Key amendments include: eliminating the requirement to separately measure and report hedge ineffectiveness, requiring changes in the value of the hedging instrument to be presented in the same income statement line as the earnings effect of the hedged item, and the ability to measure the hedged item based on the benchmark interest rate component of the total contractual coupon for fair value hedges. These changes expand the types of risk management strategies eligible for hedge accounting. The ASU also permits entities to qualitatively assert that a hedging relationship was and continues to be highly effective. New incremental disclosures are required for reporting periods subsequent to the date of adoption. All transition requirements and elections should be applied to hedging relationships existing on the date of adoption using a modified retrospective approach. January 1, 2019 Early adoption is permitted. The Company early adopted this ASU beginning January 1, 2018 and modified its measurement methodology for certain hedged items designated under fair value hedge relationships. The Company elected to perform its subsequent assessments of hedge effectiveness using a qualitative, rather than a quantitative, approach. The adoption resulted in an immaterial cumulative effect adjustment to the opening balance of retained earnings and a basis adjustment to the related hedged items arising from measuring the hedged items based on the benchmark interest rate component of the total contractual coupon of the fair value hedges. For additional information on the Company’s derivative and hedging activities, see Note 19, “Derivative Financial Instruments.” Standard Description Required Date of Adoption Effect on the Financial Statements or Other Significant Matters Standards Adopted in 2018 (continued) ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from AOCI This ASU amends ASC Topic 220, Income Statement - Reporting Comprehensive Income, to allow for a reclassification from AOCI to Retained earnings for the tax effects stranded in AOCI as a result of the remeasurement of DTAs and DTLs for the change in the federal corporate tax rate pursuant to the 2017 Tax Act, which was recognized through the income tax provision in 2017. The Company may apply this ASU at the beginning of the period of adoption or retrospectively to all periods in which the 2017 Tax Act is enacted. January 1, 2019 The Company early adopted this ASU beginning January 1, 2018. Upon adoption of this ASU, the Company elected to reclassify $182 million of stranded tax effects relating to securities AFS, derivative instruments, credit risk on long-term debt, and employee benefit plans from AOCI to retained earnings. This amount was offset by $28 million of stranded tax effects relating to equity securities previously classified as securities AFS, resulting in a net $154 million increase to retained earnings. ASU 2018-14, Compensation - Retirement Benefits - Defined Benefit Plans - General (Subtopic 715-20): Disclosure Framework - Changes to the Disclosure Requirements for Defined Benefit Plans This ASU amends ASC Subtopic 715-20, Compensation - Retirement Benefits - Defined Benefit Plans - General , to add new disclosure requirements as well as remove certain disclosure requirements to improve the effectiveness of disclosures in the notes to the financial statements. The ASU must be applied on a retrospective basis. December 31, 2020 The Company early adopted this ASU beginning December 31, 2018 and modified its employee benefit plans disclosures accordingly for each of the years ended December 31, 2018, 2017, and 2016. The adoption of this ASU did not have an impact on the Company’s Consolidated Financial Statements. See Note 17, “Employee Benefit Plans,” for the Company’s employee benefit plans disclosures. Standards Not Yet Adopted ASU 2016-02, Leases (ASC Topic 842) and subsequent related ASUs This ASU creates ASC Topic 842, Leases , which supersedes ASC Topic 840, Leases . ASC Topic 842 requires lessees to recognize right-of-use assets and associated liabilities that arise from leases, with the exception of short-term leases. The ASU does not make significant changes to lessor accounting; however, there were certain improvements made to align lessor accounting with the lessee accounting model and ASC Topic 606, Revenue from Contracts with Customers . There are several new qualitative and quantitative disclosures required. Upon transition, lessees and lessors have the option to: - Recognize and measure leases at the beginning of the earliest period presented using a modified retrospective transition approach, or - Apply a modified retrospective transition approach as of the date of adoption. January 1, 2019 Early adoption is permitted. The Company formed a cross-functional team to oversee the implementation of this ASU. The Company’s implementation included the review of its lease portfolios and related lease accounting policies, the review of its service contracts for embedded leases, and the deployment of a new lease software solution. Additionally, in conjunction with this implementation, the Company reviewed its business processes and evaluated changes to its control environment. The Company adopted this ASU on January 1, 2019, using a modified retrospective transition approach as of the date of adoption, which resulted in an increase in right-of-use assets and associated lease liabilities, arising from operating leases in which the Company is the lessee, on its Consolidated Balance Sheets. The amount of the right-of-use assets and associated lease liabilities recorded upon adoption was based primarily on the present value of unpaid future minimum lease payments, the amount of which is based on the population of leases in effect at the date of adoption. At January 1, 2019, the Company’s right-of-use assets and lease liabilities recorded on its Consolidated Balance Sheets upon adoption were $1.2 billion and $1.3 billion, respectively. Upon adoption on January 1, 2019, the Company also recognized a cumulative effect adjustment of $31 million to increase the beginning balance of retained earnings (as of January 1, 2019) for remaining deferred gains on sale-leaseback transactions that occurred prior to the date of adoption and for other transition provisions. This ASU is not expected to have a material impact on the timing of expense recognition in its Consolidated Statements of Income. The Company is in the process of developing and completing the required leasing disclosures, which will be included in its first quarter of 2019 Quarterly Report on Form 10-Q. Standard Description Required Date of Adoption Effect on the Financial Statements or Other Significant Matters Standards Not Yet Adopted (continued) ASU 2016-13, Measurement of Credit Losses on Financial Instruments (ASC Topic 326) and subsequent related ASUs This ASU adds ASC Topic 326, Financial Instruments - Credit Losses , to replace the incurred loss impairment methodology with a current expected credit loss methodology for financial instruments measured at amortized cost and other commitments to extend credit. For this purpose, expected credit losses reflect losses over the remaining contractual life of an asset, considering the effect of voluntary prepayments and considering available information about the collectability of cash flows, including information about past events, current conditions, and reasonable and supportable forecasts. The resulting allowance for credit losses is deducted from the amortized cost basis of the financial assets to reflect the net amount expected to be collected on the financial assets. Additional quantitative and qualitative disclosures are required upon adoption. The change to the allowance for credit losses at the time of the adoption will be made with a cumulative effect adjustment to retained earnings. January 1, 2020 The Company formed a cross-functional team to oversee the implementation of this ASU. A detailed implementation plan has been developed and substantial progress has been made on the identification and staging of data, development and validation of models, refinement of economic forecasting processes, and documentation of accounting policy decisions. Additionally, a new credit loss platform is being implemented to host data and run models in a controlled, automated environment. In conjunction with this implementation, the Company is reviewing business processes and evaluating potential changes to the control environment. The Company plans to perform its parallel runs of its new methodology in 2019 prior to adoption of the ASU. ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment This ASU amends ASC Topic 350, Intangibles - Goodwill and Other , to simplify the subsequent measurement of goodwill, by eliminating Step 2 from the goodwill impairment test. The amendments require an entity to perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. This ASU requires an entity to recognize an impairment charge for the amount by which a reporting unit's carrying amount exceeds its fair value, with the loss limited to the total amount of goodwill allocated to that reporting unit. The ASU must be applied on a prospective basis. January 1, 2020 Early adoption is permitted. Based on the Company’s most recent qualitative goodwill impairment assessment performed as of October 1, 2018, there were no reporting units for which it was more-likely-than-not that the carrying amount of a reporting unit exceeded its respective fair value; therefore, this ASU would not currently have an impact on the Company’s Consolidated Financial Statements or related disclosures. However, if upon adoption, which is expected to occur on January 1, 2020, the carrying amount of a reporting unit exceeds its respective fair value, the Company would be required to recognize an impairment charge for the amount that the carrying value exceeds the fair value. ASU 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract This ASU amends ASC Subtopic 350-40, Intangibles - Goodwill and Other - Internal-Use Software , to align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The Company may apply this ASU either retrospectively, or prospectively to all implementation costs incurred after the date of adoption. January 1, 2020 Early adoption is permitted. The Company’s current accounting policy for capitalizing implementation costs incurred in a hosting arrangement generally aligns with the requirements of this ASU; therefore, the Company's adoption of this ASU is not expected to have a material impact on the Company’s Consolidated Financial Statements or related disclosures.

Revenue Recognition Revenue Rec

Revenue Recognition Revenue Recognition (Policies)	12 Months Ended
	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Policy Text Block]	Service Charges on Deposit Accounts Service charges on deposit accounts represent fees relating to the Company’s various deposit products. These fees include account maintenance, cash management, treasury management, wire transfers, overdraft and other deposit-related fees. The Company’s execution of the services related to these fees represents its related performance obligations. Each of these performance obligations are either satisfied over time or at a point in time as the services are provided to the customer. The Company is the principal when rendering these services. Payments for services provided are either withdrawn from the customer’s account as services are rendered or in the billing period following the completion of the service. The transaction price for each of these fees is based on the Company’s predetermined fee schedule. Other Charges and Fees Other charges and fees consist primarily of loan commitment and letter of credit fees, operating lease revenue, ATM fees, insurance revenue, and miscellaneous service charges including wire fees and check cashing fees. Loan commitment and letter of credit fees and operating lease revenue are out of scope of ASC Topic 606. The Company’s execution of the services related to ATM fees, insurance revenue, and miscellaneous service charges represents its related performance obligations. ATM fees and miscellaneous service charges are recognized at a point in time as the services are provided. Insurance commission revenue is earned through the sale of insurance products. The commissions are recognized as revenue when the customer executes an insurance policy with the insurance carrier. In some cases, the Company receives payment of trailing commissions each year when the customer pays its annual premium. Card Fees Card fees consist of interchange fees from credit and debit cards, merchant acquirer revenue, and other card related services. Interchange fees are earned by the Company each time a request for payment is initiated by a customer at a merchant for which the Company transfers the funds on behalf of the customer. Interchange rates are set by the payment network and are based on purchase volumes and other factors. Interchange fees are received daily and recognized at a point in time when the card transaction is processed. The Company is considered an agent of the customer and incurs costs with the payment network to facilitate the interchange with the merchant; therefore, the related payment network expense is recognized as a reduction of card fees. For all periods prior to January 1, 2018, these expenses were recognized in Outside processing and software in the Company's Consolidated Statements of Income. The Company offers rewards and/or rebates to its customers based on card usage. The costs associated with these programs are recognized as a reduction of card fees. The Company also has a revenue sharing agreement with a merchant acquirer. The Company’s referral of a merchant to the merchant acquirer represents its related performance obligation, which is satisfied at a point in time when the referral is made. Monthly revenue is estimated based on the expected amount of transactions processed. Payments are generally made by the merchant acquirer quarterly in the month following the quarter in which the services are rendered. Investment Banking Income Investment banking income is comprised primarily of securities underwriting fees, advisory fees, loan syndication fees, and trade execution services revenue. The Company assists corporate clients in raising capital by offering equity or debt securities to potential investors. The underwriting fees are earned on the trade date when the Company, as a member of an underwriting syndicate, purchases the securities from the issuer and sells the securities to third party investors. Each member of the syndicate is responsible for selling its portion of the underwriting and is liable for the proportionate costs of the underwriting; therefore, the Company’s portion of underwriting revenue and expense is presented gross within noninterest income and noninterest expense. For all periods prior to January 1, 2018, underwriting expense was recorded as a reduction of investment banking income. The transaction price is based on a percentage of the total transaction amount and payments are settled shortly after the trade date. The Company also provides merger and acquisition advisory services, including various activities such as business valuation, identification of potential targets or acquirers, and the issuance of fairness opinions. The Company’s execution of these advisory services represents its related performance obligations. The performance obligations relating to advisory services are fulfilled at a point in time upon completion of the contractually specified merger or acquisition. The transaction price is based on contractually specified terms agreed upon with the client for each advisory service. Loan syndication fees are typically recognized at the closing of a loan syndication transaction. These fees are out of the scope of ASC Topic 606. Revenue related to trade execution services is earned on the trade date and recognized at a point in time. The fees related to trade execution services are due on the settlement date. Trading Income The Company recognizes trading income as a result of gains and losses from the sales of trading account assets and liabilities. The Company also recognizes trading income as a result of changes in the fair value of trading account assets and liabilities that it holds. The Company’s trading accounts include various types of debt and equity securities, trading loans, and derivative instruments. For additional information relating to trading income, see Note 19 , “Derivative Financial Instruments,” and Note 20 , “Fair Value Election and Measurement.” Mortgage Related Income Mortgage related income is comprised of mortgage production related income and mortgage servicing related income. Mortgage production related income is comprised primarily of activity related to the sale of consumer mortgage loans as well as loan origination fees such as closing charges, document review fees, application fees, other loan origination fees, and loan processing fees. The Company recognizes as assets the rights to service mortgage loans, either when the loans are sold and the associated servicing rights are retained or when servicing rights are purchased from a third party. Mortgage servicing related income includes servicing fees, modification fees, fees for ancillary services, other fees customarily associated with servicing arrangements, gains or losses from hedging, and changes in the fair value of residential MSRs inclusive of decay resulting from the realization of monthly net servicing cash flows. For additional information relating to mortgage related income, see Note 1 , “Significant Accounting Policies,” Note 10 , “Goodwill and Other Intangible Assets,” Note 19 , “Derivative Financial Instruments,” and Note 20 , “Fair Value Election and Measurement.” Trust and Investment Management Income Trust and investment management income includes revenue from custodial services, trust administration, financial advisory services, employee benefit solutions, and other services provided to customers within the Consumer business segment. The Company generally recognizes trust and investment management revenue over time as services are rendered. Revenue is based on either a percentage of the market value of the assets under management, or advisement, or fixed based on the services provided to the customer. Fees are generally swept from the customer’s account one billing period in arrears based on the prior period’s assets under management or advisement. Retail Investment Services Retail investment services consists primarily of investment management, selling and distribution services, and trade execution services. The Company’s execution of these services represents its related performance obligations. Investment management fees are generally recognized over time as services are rendered and are based on either a percentage of the market value of the assets under management, or advisement, or fixed based on the services provided to the customer. The fees are calculated quarterly and are usually collected at the beginning of the period from the customer’s account and recognized ratably over the related billing period. The Company also offers selling and distribution services and earns commissions through the sale of annuity and mutual fund products. The Company acts as an agent in these transactions and recognizes revenue at a point in time when the customer enters into an agreement with the product carrier. The Company may also receive trailing commissions and 12b-1 fees related to mutual fund and annuity products, and recognizes this revenue in the period that they are realized since the revenue cannot be accurately predicted at the time the policy becomes effective. Trade execution commissions are earned and recognized on the trade date, when the Company executes a trade for a customer. Payment for the trade execution is due on the settlement date. Commercial Real Estate Related Income Commercial real estate related income consists primarily of origination fees, such as loan placement and broker fees, gains and losses on the sale of commercial loans, commercial mortgage loan servicing fees, income from community development investments, including the sale of tax credits, gains and losses from the sale of structured real estate, and other fee income. For additional information relating to commercial real estate related income, see Note 1 , “Significant Accounting Policies,” Note 10 , “Goodwill and Other Intangible Assets,” Note 19 , “Derivative Financial Instruments,” and Note 20 , “Fair Value Election and Measurement.” Net Securities Gains or Losses The Company recognizes net securities gains or losses primarily as a result of the sale of securities AFS and the recognition of any OTTI on securities AFS. For additional information relating to net securities gains or losses, see Note 6 , “Investment Securities.” Other Noninterest Income Other noninterest income within the scope of ASC Topic 606 consists primarily of fees from the sale of customized personal checks. The Company serves as an agent for customers by connecting them with a third party check provider. Revenue from such sales are earned in the form of commissions from the third party check provider and is recognized at a point in time on the date the customer places an order. Commissions for personal check orders are credited to revenue on an ongoing basis, and commissions for commercial check orders are received quarterly in arrears. Other noninterest income also includes income from bank-owned life insurance policies that is not within the scope of ASC Topic 606. Income from bank-owned life insurance primarily represents changes in the cash surrender value of such life insurance policies held on certain key employees, for which the Company is the owner and beneficiary. Revenue is recognized in each period based on the change in the cash surrender value during the period. Practical Expedients and Other The Company has elected the practical expedient to exclude disclosure of unsatisfied performance obligations for (i) contracts with an original expected length of one year or less and (ii) contracts for which the Company recognizes revenue at the amount to which the Company has the right to invoice for services performed. The Company pays sales commissions as a cost to obtain certain contracts within the scope of ASC Topic 606; however, sales commissions relating to these contracts are generally expensed when incurred because the amortization period would be one year or less. Sales commissions are recognized as employee compensation within Noninterest expense on the Company’s Consolidated Statements of Income. At December 31, 2018 , the Company does not have any material contract assets, liabilities, or other receivables recorded on its Consolidated Balance Sheets relating to its revenue streams within the scope of ASC

Employee Benefit Plans Employee

Employee Benefit Plans Employee Benefits - Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]	The Company sponsors various compensation and benefit programs to attract and retain talent. Aligned with a pay for performance culture, the Company's plans and programs include short-term incentives, AIP , and various LTI plans. All incentive awards are subject to clawback provisions. Compensation expense for AIP and LTI plans with cash payouts was $235 million , $319 million , and $291 million for the years ended December 31, 2018, 2017, and 2016 , respectively. Compensation expense for short-term incentive plans with cash payouts was $466 million , $476 million , and $469 million for the years ended December 31, 2018, 2017, and 2016 , respectively. Stock-Based Compensation The Company provides stock-based awards through the 2018 Omnibus Incentive Compensation Plan and various other deferred compensation plans under which the Compensation Committee of the Board of Directors has the authority to grant various awards such as restricted stock, phantom stock units, stock options, and RSU s to key employees of the Company. Award vesting may be conditional based upon individual, business unit, Company, and/or performance relative to peer group metrics. The 2018 Omnibus Incentive Compensation Plan became effective in April 2018, under which the total number of shares available for grant as awards under this plan is 17 million , less shares subject to awards granted under pre-existing plans. Pre-existing plans include the 2009 Stock Plan and the 2004 Stock Plan. At December 31, 2018 , approximately 14 million shares were available for grant. All granted stock options are exercisable for 10 years after the grant date. Shares or units of restricted stock may be granted to employees and directors. Generally, grants to employees either cliff vest after three years or vest pro-rata annually over three years. Restricted stock and RSU grants may be subject to one or more criteria, including employment, performance, or other conditions as established by the Compensation Committee at the time of grant. Any shares of restricted stock that are forfeited will again become available for issuance under the Company's deferred compensation plans. An employee or director has the right to vote the shares of restricted stock after grant until they are forfeited. Compensation cost for restricted stock and RSU s is generally equal to the fair market value of the shares on the grant date of the award and is amortized over the vesting period. Dividends are paid on awarded, unvested restricted stock. The Company accrues and reinvests dividends in equivalent shares of SunTrust common stock for unvested RSU awards, which are paid out when the underlying RSU award vests. RSU

Schedule of Disaggregation of R

Schedule of Disaggregation of Revenue (Tables)	12 Months Ended
	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Table Text Block]	Pursuant to the Company's adoption of ASC Topic 606, Revenue from Contracts with Customers , the following table reflects the Company’s noninterest income disaggregated by the amount of revenue that is in scope and out of scope of ASC Topic 606. (Dollars in millions) Year Ended December 31, 2018 Noninterest income Revenue in scope of ASC Topic 606 $1,992 Revenue out of scope of ASC Topic 606 1,234 Total noninterest income $3,226 The following tables further disaggregate the Company’s noninterest income by financial statement line item, business segment, and by the amount of each revenue stream that is in scope or out of scope of ASC Topic 606. The commentary following these tables describes the Company's accounting policies for recognizing noninterest income, including the nature and timing of such revenue streams. The Company's contracts with customers generally do not contain terms that require significant judgment to determine the amount of revenue to recognize. Year Ended December 31, 2018 1 (Dollars in millions) Consumer 2 Wholesale 2 Out of Scope 2, 3 Total Noninterest income Service charges on deposit accounts $444 $135 $— $579 Other charges and fees 4, 5 114 12 230 356 Card fees 216 104 4 324 Investment banking income 4 — 352 247 599 Trading income — — 161 161 Mortgage related income — — 342 342 Trust and investment management income 301 — 3 304 Retail investment services 6 289 2 1 292 Commercial real estate related income — — 134 134 Net securities gains — — 1 1 Other noninterest income 23 — 111 134 Total noninterest income $1,387 $605 $1,234 $3,226 1 Amounts are presented in accordance with ASC Topic 606, Revenue from Contracts with Customers , except for out of scope amounts. 2 Consumer total noninterest income and Wholesale total noninterest income exclude $417 million and $929 million of out of scope noninterest income, respectively, which are included in the business segment results presented on a management accounting basis in Note 22 , "Business Segment Reporting." Out of scope total noninterest income includes these amounts and also includes ($112) million of Corporate Other noninterest income that is not subject to ASC Topic 606. 3 The Company presents out of scope noninterest income for the purpose of reconciling noninterest income amounts within the scope of ASC Topic 606 to noninterest income amounts presented on the Company's Consolidated Statements of Income. 4 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. 5 The Company recognized an immaterial amount of insurance trailing commissions, the majority of which related to performance obligations satisfied in prior periods. 6 The Company recognized $50 million of mutual fund 12b-1 fees and annuity trailing commissions, the majority of which related to performance obligations satisfied in periods prior to December 31, 2018 . Year Ended December 31, 2017 1 (Dollars in millions) Consumer 2 Wholesale 2 Out of Scope 2, 3 Total Noninterest income Service charges on deposit accounts $460 $143 $— $603 Other charges and fees 4 124 12 225 361 Card fees 232 108 4 344 Investment banking income 4 — 371 252 623 Trading income — — 189 189 Mortgage related income — — 422 422 Trust and investment management income 302 — 7 309 Retail investment services 275 2 1 278 Commercial real estate related income — — 123 123 Net securities losses — — (108 ) (108 ) Gain on sale of subsidiary — — 107 107 Other noninterest income 26 — 77 103 Total noninterest income $1,419 $636 $1,299 $3,354 1 Amounts for periods prior to January 1, 2018 are presented in accordance with ASC Topic 605, Revenue Recognition , and have not been restated to conform with ASC Topic 606, Revenue from Contracts with Customers . 2 Consumer total noninterest income and Wholesale total noninterest income exclude $486 million and $937 million of out of scope noninterest income, respectively, which are included in the business segment results presented on a management accounting basis in Note 22 , "Business Segment Reporting." Out of scope total noninterest income includes these amounts and also includes ($124) million of Corporate Other noninterest income that is not subject to ASC Topic 606. 3 The Company presents out of scope noninterest income for the purpose of reconciling noninterest income amounts within the scope of ASC Topic 606 to noninterest income amounts presented on the Company's Consolidated Statements of Income. 4 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. Year Ended December 31, 2016 1 (Dollars in millions) Consumer 2 Wholesale 2 Out of Scope 2, 3 Total Noninterest income Service charges on deposit accounts $482 $148 $— $630 Other charges and fees 4 130 11 218 359 Card fees 228 93 6 327 Investment banking income 4 — 317 198 515 Trading income — — 211 211 Mortgage related income — — 555 555 Trust and investment management income 300 — 4 304 Retail investment services 277 3 1 281 Commercial real estate related income — — 69 69 Net securities gains — — 4 4 Other noninterest income 27 — 101 128 Total noninterest income $1,444 $572 $1,367 $3,383 1 Amounts for periods prior to January 1, 2018 are presented in accordance with ASC Topic 605, Revenue Recognition , and have not been restated to conform with ASC Topic 606, Revenue from Contracts with Customers . 2 Consumer total noninterest income and Wholesale total noninterest income exclude $623 million and $753 million of out of scope noninterest income, respectively, which are included in the business segment results presented on a management accounting basis in Note 22 , "Business Segment Reporting." Out of scope total noninterest income includes these amounts and also includes ($9) million of Corporate Other noninterest income that is not subject to ASC Topic 606. 3 The Company presents out of scope noninterest income for the purpose of reconciling noninterest income amounts within the scope of ASC Topic 606 to noninterest income amounts presented on the Company's Consolidated Statements of Income. 4 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.

Schedule of Acquisitions and Di

Schedule of Acquisitions and Dispositions (Tables)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Schedule of Acquisitions and Dispositions [Abstract]
Schedule of Business Acquisitions, by Acquisition [Table Text Block]	During the years ended December 31, 2018, 2017, and 2016 , the Company had the following notable acquisition and disposition: (Dollars in millions) Date Consideration Received/(Paid) Goodwill Other Intangible Assets Pre-tax Gain 2017 Sale of PAC 12/1/2017 $261 ($7 ) $— $107 2016 Acquisition of Pillar 12/15/2016 ($197 ) $1 $13 1 $— 1 Does not include $62 million
Subsidiary Income Statement [Table Text Block]		The Company's results for the years ended December 31 , 2017 and 2016 included the following related to PAC , excluding the gain on sale: (Dollars in millions) PAC Financial Information: 2017 2016 Revenue $56 $60 Less: Expenses 31 27 Income before provision for income taxes $25 $33

Federal Funds Sold and Securi_2

Federal Funds Sold and Securities Financing Activities (Tables)	12 Months Ended
	Dec. 31, 2018
Securities Purchased under Agreements to Resell [Abstract]
Schedule of Resale Agreements [Table Text Block]	Fed Funds sold and securities borrowed or purchased under agreements to resell were as follows: (Dollars in millions) December 31, 2018 December 31, 2017 Fed funds sold $42 $65 Securities borrowed 394 298 Securities purchased under agreements to resell 1,243 1,175 Total Fed funds sold and securities borrowed or purchased under agreements to resell $1,679 $1,538
Securities sold under agreements to repurchase remaining contractual maturity [Table Text Block]	Securities sold under agreements to repurchase are accounted for as secured borrowings. The following table presents the Company’s related activity, by collateral type and remaining contractual maturity: December 31, 2018 December 31, 2017 (Dollars in millions) Overnight and Continuous Up to 30 days 30-90 days Total Overnight and Continuous Up to 30 days 30-90 days Total U.S. Treasury securities $197 $7 $— $204 $95 $— $— $95 Federal agency securities 112 10 — 122 101 15 — 116 MBS - agency 881 35 — 916 694 135 — 829 CP 78 — — 78 19 — — 19 Corporate and other debt securities 216 158 80 454 316 88 40 444 Total securities sold under agreements to repurchase $1,484 $210 $80 $1,774 $1,225 $238 $40 $1,503
Netting of Financial Instruments - Repurchase Agreements [Table Text Block]	The following table presents the Company's securities borrowed or purchased under agreements to resell and securities sold under agreements to repurchase that are subject to MRA s. Generally, MRA s require collateral to exceed the asset or liability recognized on the balance sheet. Transactions subject to these agreements are treated as collateralized financings, and those with a single counterparty are permitted to be presented net on the Company's Consolidated Balance Sheets, provided certain criteria are met that permit balance sheet netting. At December 31, 2018 and 2017 , there were no such transactions subject to legally enforceable MRA s that were eligible for balance sheet netting. The following table includes the amount of collateral pledged or received related to exposures subject to enforceable MRA s. While these agreements are typically over-collateralized, the amount of collateral presented in this table is limited to the amount of the related recognized asset or liability for each counterparty. (Dollars in millions) Gross Amount Amount Offset Net Amount Presented in Consolidated Balance Sheets Held/Pledged Financial Instruments Net Amount December 31, 2018 Financial assets: Securities borrowed or purchased under agreements to resell $1,637 $— $1,637 1 $1,624 $13 Financial liabilities: Securities sold under agreements to repurchase 1,774 — 1,774 1,774 — December 31, 2017 Financial assets: Securities borrowed or purchased under agreements to resell $1,473 $— $1,473 1 $1,462 $11 Financial liabilities: Securities sold under agreements to repurchase 1,503 — 1,503 1,503 — 1 Excludes $42 million and $65 million of Fed Funds sold, which are not subject to a master netting agreement at December 31, 2018 and 2017

Trading Assets and Liabilitie_2

Trading Assets and Liabilities and Derivatives Trading Assets and Liabilities and Derivatives (Tables)	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block]	The fair values of the components of trading assets and liabilities and derivative instruments are presented in the following table: (Dollars in millions) December 31, 2018 December 31, 2017 Trading Assets and Derivative Instruments: U.S. Treasury securities $262 $157 Federal agency securities 188 395 U.S. states and political subdivisions 54 61 MBS - agency 860 700 Corporate and other debt securities 700 655 CP 190 118 Equity securities 73 56 Derivative instruments 1 639 802 Trading loans 2 2,540 2,149 Total trading assets and derivative instruments $5,506 $5,093 Trading Liabilities and Derivative Instruments: U.S. Treasury securities $801 $577 MBS - agency 3 — Corporate and other debt securities 385 289 Equity securities 5 9 Derivative instruments 1 410 408 Total trading liabilities and derivative instruments $1,604 $1,283 1 Amounts include the impact of offsetting cash collateral received from and paid to the same derivative counterparties, and the impact of netting derivative assets and derivative liabilities when a legally enforceable master netting agreement or similar agreement exists. 2 Includes loans related to TRS
Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block]	Pledged trading assets are presented in the following table: (Dollars in millions) December 31, 2018 December 31, 2017 Pledged trading assets to secure repurchase agreements 1 $1,418 $1,016 Pledged trading assets to secure certain derivative agreements 22 72 Pledged trading assets to secure other arrangements 40 41 1 Repurchase agreements secured by collateral totaled $1.4 billion and $975 million at December 31, 2018 and 2017

Securities Available for Sale (

Securities Available for Sale (Tables)	12 Months Ended
	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Securities Portfolio Composition	Securities Portfolio Composition December 31, 2018 (Dollars in millions) Amortized Unrealized Unrealized Fair Securities AFS: U.S. Treasury securities $4,277 $— $66 $4,211 Federal agency securities 221 2 2 221 U.S. states and political subdivisions 606 4 21 589 MBS - agency residential 23,161 128 425 22,864 MBS - agency commercial 2,688 8 69 2,627 MBS - non-agency commercial 943 — 27 916 Corporate and other debt securities 14 — — 14 Total securities AFS $31,910 $142 $610 $31,442 December 31, 2017 1 (Dollars in millions) Amortized Unrealized Unrealized Fair Securities AFS: U.S. Treasury securities $4,361 $2 $32 $4,331 Federal agency securities 257 3 1 259 U.S. states and political subdivisions 618 7 8 617 MBS - agency residential 22,616 222 134 22,704 MBS - agency commercial 2,121 3 38 2,086 MBS - non-agency residential 55 4 — 59 MBS - non-agency commercial 862 7 3 866 ABS 6 2 — 8 Corporate and other debt securities 17 — — 17 Total securities AFS $30,913 $250 $216 $30,947 1 Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability . See Note 11 , "Other Assets," for additional information.
Investment Income [Table Text Block]	The following table presents interest on securities AFS: Year Ended December 31 (Dollars in millions) 2018 2017 2016 Taxable interest $830 $743 $630 Tax-exempt interest 19 13 6 Total interest on securities AFS 1 $849 $756 $636 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 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
Amortized Cost and Fair Value of Investments in Debt Securities by Estimated Average Life	The following table presents the amortized cost, fair value, and weighted average yield of the Company's investment securities at December 31, 2018 , by remaining contractual maturity, with the exception of MBS , which are based on estimated average life. Receipt of cash flows may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without penalties. Distribution of Remaining Maturities (Dollars in millions) Due in 1 Year or Less Due After 1 Year through 5 Years Due After 5 Years through 10 Years Due After 10 Years Total Amortized Cost: Securities AFS: U.S. Treasury securities $315 $2,646 $1,316 $— $4,277 Federal agency securities 112 29 8 72 221 U.S. states and political subdivisions 2 81 15 508 606 MBS - agency residential 1,558 3,684 15,962 1,957 23,161 MBS - agency commercial 1 495 1,885 307 2,688 MBS - non-agency commercial — 12 931 — 943 Corporate and other debt securities — 14 — — 14 Total securities AFS $1,988 $6,961 $20,117 $2,844 $31,910 Fair Value: Securities AFS: U.S. Treasury securities $312 $2,603 $1,296 $— $4,211 Federal agency securities 113 29 8 71 221 U.S. states and political subdivisions 2 84 16 487 589 MBS - agency residential 1,607 3,655 15,682 1,920 22,864 MBS - agency commercial 1 483 1,845 298 2,627 MBS - non-agency commercial — 12 904 — 916 Corporate and other debt securities — 14 — — 14 Total securities AFS $2,035 $6,880 $19,751 $2,776 $31,442 Weighted average yield 1 3.05 % 2.25 % 2.98 % 3.11 % 2.84 % 1
Securities in a Continuous Unrealized Loss Position	ecurities in an unrealized loss position at period end are presented in the following tables: December 31, 2018 Less than twelve months Twelve months or longer Total (Dollars in millions) Fair Unrealized 1 Fair Unrealized 1 Fair Unrealized 1 Temporarily impaired securities AFS: U.S. Treasury securities $— $— $4,177 $66 $4,177 $66 Federal agency securities — — 63 2 63 2 U.S. states and political subdivisions 49 1 430 20 479 21 MBS - agency residential 1,229 5 15,384 420 16,613 425 MBS - agency commercial 68 — 1,986 69 2,054 69 MBS - non-agency commercial 106 1 773 26 879 27 Corporate and other debt securities — — 9 — 9 — Total temporarily impaired securities AFS 1,452 7 22,822 603 24,274 610 OTTI securities AFS 2 : Total OTTI securities AFS — — — — — — Total impaired securities AFS $1,452 $7 $22,822 $603 $24,274 $610 1 Unrealized losses less than $0.5 million are presented as zero within the table. 2 OTTI securities AFS are impaired securities for which OTTI credit losses have been previously recognized in earnings. December 31, 2017 1 Less than twelve months Twelve months or longer Total (Dollars in millions) Fair Value Unrealized 2 Losses Fair Value Unrealized 2 Losses Fair Value Unrealized 2 Losses Temporarily impaired securities AFS: U.S. Treasury securities $1,993 $12 $841 $20 $2,834 $32 Federal agency securities 23 — 60 1 83 1 U.S. states and political subdivisions 267 3 114 5 381 8 MBS - agency residential 8,095 38 4,708 96 12,803 134 MBS - agency commercial 887 9 915 29 1,802 38 MBS - non-agency commercial 134 1 93 2 227 3 ABS — — 4 — 4 — Corporate and other debt securities 10 — — — 10 — Total temporarily impaired securities AFS 11,409 63 6,735 153 18,144 216 OTTI securities AFS 3 : ABS — — 1 — 1 — Total OTTI securities AFS — — 1 — 1 — Total impaired securities AFS $11,409 $63 $6,736 $153 $18,145 $216 1 Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability . 2 Unrealized losses less than $0.5 million are presented as zero within the table. 3 OTTI securities AFS are impaired securities for which OTTI
Realized Gain (Loss) on Investments [Table Text Block]	Net securities gains or losses are comprised of gross realized gains, gross realized losses, and OTTI credit losses recognized in earnings. Year Ended December 31 (Dollars in millions) 2018 2017 2016 Gross realized gains $9 $3 $4 Gross realized losses (8 ) (110 ) — OTTI credit losses recognized in earnings — (1 ) — Net securities gains/(losses) $1 ($108 ) $4

Loans (Tables)

Loans (Tables)	12 Months Ended
	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Composition of Loan Portfolio	(Dollars in millions) December 31, 2018 December 31, 2017 Commercial loans: C&I 1 $71,137 $66,356 CRE 7,265 5,317 Commercial construction 2,538 3,804 Total commercial LHFI 80,940 75,477 Consumer loans: Residential mortgages - guaranteed 459 560 Residential mortgages - nonguaranteed 2 28,836 27,136 Residential home equity products 9,468 10,626 Residential construction 184 298 Guaranteed student 7,229 6,633 Other direct 10,615 8,729 Indirect 12,419 12,140 Credit cards 1,689 1,582 Total consumer LHFI 70,899 67,704 LHFI $151,839 $143,181 LHFS 3 $1,468 $2,290 1 Includes $4.1 billion and $3.7 billion of lease financing, and $796 million and $778 million of installment loans at December 31, 2018 and 2017 , respectively. 2 Includes $163 million and $196 million of LHFI measured at fair value at December 31, 2018 and 2017 , respectively. 3 Includes $1.2 billion and $1.6 billion of LHFS measured at fair value at December 31, 2018 and 2017
Loan Purchases, sales, and transfers [Table Text Block]	Year Ended December 31 (Dollars in millions) 2018 2017 Non-routine purchases of LHFI: 1 Consumer loans $101 $233 Routine purchases of LHFI: 2 Consumer loans 2,122 1,729 Loan sales: 3, 4 Commercial loans 170 703 Consumer loans 99 2 Transfers of loans from: LHFI to LHFS 532 288 LHFS to LHFI 28 19 LHFI to OREO 62 57 1 Purchases are episodic in nature and are conducted based on specific business strategies. 2 Purchases are routine in nature and are conducted in the normal course of business. 3 Excludes sales of residential and commercial mortgage LHFS conducted in the normal course of business. 4 Net gain on loan sales were immaterial during the years ended December 31, 2018 and 2017 .
LHFI by Credit Quality Indicator	LHFI by credit quality indicator are presented in the following tables: Commercial Loans C&I CRE Commercial Construction (Dollars in millions) December 31, 2018 December 31, 2017 December 31, 2018 December 31, 2017 December 31, 2018 December 31, 2017 Risk rating: Pass $69,095 $64,546 $7,165 $5,126 $2,459 $3,770 Criticized accruing 1,885 1,595 98 167 79 33 Criticized nonaccruing 157 215 2 24 — 1 Total $71,137 $66,356 $7,265 $5,317 $2,538 $3,804 Consumer Loans 1 Residential Mortgages - Nonguaranteed Residential Home Equity Products Residential Construction (Dollars in millions) December 31, 2018 December 31, 2017 December 31, 2018 December 31, 2017 December 31, 2018 December 31, 2017 Current FICO score range: 700 and above $25,764 $23,602 $8,060 $8,946 $151 $240 620 - 699 2,367 2,721 1,015 1,242 27 50 Below 620 2 705 813 393 438 6 8 Total $28,836 $27,136 $9,468 $10,626 $184 $298 Other Direct Indirect Credit Cards (Dollars in millions) December 31, 2018 December 31, 2017 December 31, 2018 December 31, 2017 December 31, 2018 December 31, 2017 Current FICO score range: 700 and above $9,642 $7,929 $9,315 $9,094 $1,142 $1,088 620 - 699 935 757 2,395 2,344 420 395 Below 620 2 38 43 709 702 127 99 Total $10,615 $8,729 $12,419 $12,140 $1,689 $1,582 1 Excludes $7.2 billion and $6.6 billion of guaranteed student loans and $459 million and $560 million of guaranteed residential mortgages at December 31, 2018 and 2017 , respectively, for which there was nominal risk of principal loss due to the government guarantee. 2 For substantially all loans with refreshed FICO scores below 620, the borrower’s FICO score at the time of origination exceeded 620 but has since deteriorated as the loan has seasoned.
Payment Status for the LHFI Portfolio	The LHFI portfolio by payment status is presented in the following tables: December 31, 2018 Accruing (Dollars in millions) Current 30-89 Days Past Due 90+ Days Past Due Nonaccruing 1 Total Commercial loans: C&I $70,901 $64 $15 $157 $71,137 CRE 7,259 3 1 2 7,265 Commercial construction 2,538 — — — 2,538 Total commercial LHFI 80,698 67 16 159 80,940 Consumer loans: Residential mortgages - guaranteed 125 39 295 — 3 459 Residential mortgages - nonguaranteed 2 28,552 70 10 204 28,836 Residential home equity products 9,268 62 — 138 9,468 Residential construction 170 3 — 11 184 Guaranteed student 5,236 685 1,308 — 3 7,229 Other direct 10,559 45 4 7 10,615 Indirect 12,286 125 1 7 12,419 Credit cards 1,654 17 18 — 1,689 Total consumer LHFI 67,850 1,046 1,636 367 70,899 Total LHFI $148,548 $1,113 $1,652 $526 $151,839 1 Includes nonaccruing LHFI past due 90 days or more of $306 million . Nonaccruing LHFI past due fewer than 90 days include nonaccrual loans modified in TDRs, performing second lien loans where the first lien loan is nonperforming, and certain energy-related commercial loans. 2 I ncludes $163 million of loans measured at fair value, the majority of which were accruing current. 3 Guaranteed loans are not placed on nonaccrual status regardless of delinquency because collection of principal and interest is reasonably assured by the government. December 31, 2017 Accruing (Dollars in millions) Current 30-89 Days Past Due 90+ Days Past Due Nonaccruing 1 Total Commercial loans: C&I $66,092 $42 $7 $215 $66,356 CRE 5,293 — — 24 5,317 Commercial construction 3,803 — — 1 3,804 Total commercial LHFI 75,188 42 7 240 75,477 Consumer loans: Residential mortgages - guaranteed 159 55 346 — 3 560 Residential mortgages - nonguaranteed 2 26,778 148 4 206 27,136 Residential home equity products 10,348 75 — 203 10,626 Residential construction 280 7 — 11 298 Guaranteed student 4,946 659 1,028 — 3 6,633 Other direct 8,679 36 7 7 8,729 Indirect 12,022 111 — 7 12,140 Credit cards 1,556 13 13 — 1,582 Total consumer LHFI 64,768 1,104 1,398 434 67,704 Total LHFI $139,956 $1,146 $1,405 $674 $143,181 1 Includes nonaccruing LHFI past due 90 days or more of $357 million . Nonaccruing LHFI past due fewer than 90 days include nonaccrual loans modified in TDRs, performing second lien loans where the first lien loan is nonperforming, and certain energy-related commercial loans. 2 Includes $196 million of loans measured at fair value, the majority of which were accruing current. 3 Guaranteed loans are not placed on nonaccrual status regardless of delinquency because collection of principal and interest is reasonably assured by the government.
LHFI Considered Impaired	December 31, 2018 December 31, 2017 (Dollars in millions) Unpaid Principal Balance Carrying 1 Value Related ALLL Unpaid Principal Balance Carrying 1 Value Related ALLL Impaired LHFI with no ALLL recorded: Commercial loans: C&I $132 $79 $— $38 $35 $— CRE 10 — — — — — Total commercial LHFI with no ALLL recorded 142 79 — 38 35 — Consumer loans: Residential mortgages - nonguaranteed 501 397 — 458 363 — Residential construction 12 7 — 15 9 — Total consumer LHFI with no ALLL recorded 513 404 — 473 372 — Impaired LHFI with an ALLL recorded: Commercial loans: C&I 81 70 13 127 117 19 CRE — — — 21 21 2 Total commercial LHFI with an ALLL recorded 81 70 13 148 138 21 Consumer loans: Residential mortgages - nonguaranteed 1,006 984 96 1,133 1,103 113 Residential home equity products 849 799 44 953 895 54 Residential construction 79 76 6 93 90 7 Other direct 57 57 1 59 59 1 Indirect 133 133 5 123 122 7 Credit cards 30 9 2 26 7 1 Total consumer LHFI with an ALLL recorded 2,154 2,058 154 2,387 2,276 183 Total impaired LHFI $2,890 $2,611 $167 $3,046 $2,821 $204 1 Carrying value reflects charge-offs that have been recognized plus other amounts that have been applied to adjust the net book balance. Included in the impaired LHFI carrying values above at December 31, 2018 and 2017 were $2.3 billion and $2.4 billion of accruing TDRs, of which 97% and 96% were current, respectively. See Note 1 , “Significant Accounting Policies,” for further information regarding the Company’s loan impairment policy. Year Ended December 31 2018 2017 2016 (Dollars in millions) Average Carrying Value Interest 1 Income Recognized Average Carrying Value Interest 1 Income Recognized Average Carrying Value Interest 1 Impaired LHFI with no ALLL recorded: Commercial loans: C&I $121 $7 $34 $1 $169 $3 CRE 39 — — — — — Total commercial LHFI with no ALLL recorded 160 7 34 1 169 3 Consumer loans: Residential mortgages - nonguaranteed 404 19 357 15 370 16 Residential construction 8 1 8 — 8 — Total consumer LHFI with no ALLL recorded 412 20 365 15 378 16 Impaired LHFI with an ALLL recorded: Commercial loans: C&I 71 1 112 2 170 1 CRE — — 22 1 25 1 Total commercial LHFI with an ALLL recorded 71 1 134 3 195 2 Consumer loans: Residential mortgages - nonguaranteed 993 48 1,123 58 1,251 64 Residential home equity products 816 36 914 32 812 29 Residential construction 78 3 94 5 110 6 Other direct 58 4 60 4 10 1 Indirect 147 7 136 6 114 6 Credit cards 8 1 6 1 6 1 Total consumer LHFI with an ALLL recorded 2,100 99 2,333 106 2,303 107 Total impaired LHFI $2,743 $127 $2,866 $125 $3,045 $128 1 Of the interest income recognized during the years ended December 31, 2018, 2017, and 2016 , cash basis interest income was immaterial.
Nonperforming Assets	NPAs are presented in the following table: (Dollars in millions) December 31, 2018 December 31, 2017 NPAs: Commercial NPLs: C&I $157 $215 CRE 2 24 Commercial construction — 1 Consumer NPLs: Residential mortgages - nonguaranteed 204 206 Residential home equity products 138 203 Residential construction 11 11 Other direct 7 7 Indirect 7 7 Total nonaccrual loans/NPLs 1 526 674 OREO 2 54 57 Other repossessed assets 9 10 Total NPAs $589 $741 1 Nonaccruing restructured loans are included in total nonaccrual loans /NPLs. 2 Does not include foreclosed real estate related to loans insured by the FHA or guaranteed by the VA . Proceeds due from the FHA and the VA are recorded as a receivable in Other assets in the Consolidated Balance Sheets until the property is conveyed and the funds are received. The receivable related to proceeds due from the FHA and the VA totaled $50 million and $45 million at December 31, 2018 and 2017 , respectively.
TDR Modifications	Year Ended December 31, 2018 1 (Dollars in millions) Number of Loans Modified Rate Modification Term Extension and/or Other Concessions Total Commercial loans: C&I 169 $2 $77 $79 CRE 1 — — — Consumer loans: Residential mortgages - nonguaranteed 299 19 52 71 Residential home equity products 525 2 41 43 Residential construction 4 — — — Other direct 701 — 10 10 Indirect 2,585 — 58 58 Credit cards 1,410 5 — 5 Total TDR additions 5,694 $28 $238 $266 1 Includes loans modified under the terms of a TDR that were charged-off during the period. Year Ended December 31, 2017 1 (Dollars in millions) Number of Loans Modified Rate Modification Term Extension and/or Other Concessions Total Commercial loans: C&I 178 $3 $43 $46 Consumer loans: Residential mortgages - nonguaranteed 150 22 10 32 Residential home equity products 2,488 45 176 221 Other direct 661 — 9 9 Indirect 2,740 — 61 61 Credit cards 919 4 — 4 Total TDR additions 7,136 $74 $299 $373 1 Includes loans modified under the terms of a TDR that were charged-off during the period. Year Ended December 31, 2016 1 (Dollars in millions) Number of Loans Modified Rate Modification Term Extension and/or Other Concessions Total Commercial loans: C&I 84 $2 $68 $70 Commercial construction 1 — — — Consumer loans: Residential mortgages - nonguaranteed 397 79 12 91 Residential home equity products 2,611 9 227 236 Residential construction 1 — — — Other direct 2 3,925 — 50 50 Indirect 1,539 — 32 32 Credit cards 720 3 — 3 Total TDR additions 9,278 $93 $389 $482 1 Includes loans modified under the terms of a TDR that were charged-off during the period. 2 Includes 3,321 loans with a carrying value of $41 million that were modified prior to 2016 and reclassified as TDRs in the fourth quarter of 2016.
Concentration Risk Disclosure [Text Block]	(Dollars in millions) December 31, 2018 December 31, 2017 Interest only mortgages with MI or with combined original LTV ≤ 80% 1 $464 $569 Interest only mortgages with no MI and with combined original LTV > 80% 1 28 77 Total interest only mortgages 1 492 646 Amortizing mortgages with combined original LTV > 80% and/or second liens 2 10,922 10,197 Total mortgages with potential concentration of credit risk $11,414 $10,843

Allowance for Credit Losses (Ta

Allowance for Credit Losses (Tables)	12 Months Ended
	Dec. 31, 2018
Allowance for Credit Losses [Abstract]
Activity in the Allowance for Credit Losses	The allowance for credit losses consists of the ALLL and the unfunded commitments reserve. Activity in the allowance for credit losses by loan segment is presented in the following tables: Year Ended December 31, 2018 (Dollars in millions) Commercial Consumer Total ALLL, beginning of period $1,101 $634 $1,735 Provision for loan losses 86 132 218 Loan charge-offs (131 ) (322 ) (453 ) Loan recoveries 24 91 115 ALLL, end of period 1,080 535 1,615 Unfunded commitments reserve, beginning of period 1 79 — 79 Benefit for unfunded commitments (10 ) — (10 ) Unfunded commitments reserve, end of period 1 69 — 69 Allowance for credit losses, end of period $1,149 $535 $1,684 1 The unfunded commitments reserve is recorded in Other liabilities in the Consolidated Balance Sheets. Year Ended December 31, 2017 (Dollars in millions) Commercial Consumer Total ALLL, beginning of period $1,124 $585 $1,709 Provision for loan losses 108 289 397 Loan charge-offs (167 ) (324 ) (491 ) Loan recoveries 40 84 124 Other 1 (4 ) — (4 ) ALLL, end of period 1,101 634 1,735 Unfunded commitments reserve, beginning of period 2 67 — 67 Provision for unfunded commitments 12 — 12 Unfunded commitments reserve, end of period 2 79 — 79 Allowance for credit losses, end of period $1,180 $634 $1,814 1 Related to loans disposed in connection with the sale of PAC . For additional information regarding the sale of PAC , see Note 3 , "Acquisitions/Dispositions." 2 The unfunded commitments reserve is recorded in Other liabilities in the Consolidated Balance Sheets. Year Ended December 31, 2016 (Dollars in millions) Commercial Consumer Total ALLL, beginning of period $1,047 $705 $1,752 Provision for loan losses 329 111 440 Loan charge-offs (287 ) (304 ) (591 ) Loan recoveries 35 73 108 ALLL, end of period 1,124 585 1,709 Unfunded commitments reserve, beginning of period 1 63 — 63 Provision for unfunded commitments 4 — 4 Unfunded commitments reserve, end of period 1 67 — 67 Allowance for credit losses, end of period $1,191 $585 $1,776 1 The unfunded commitments reserve is recorded in Other liabilities in the Consolidated Balance Sheets.
Loans Held for Investment portfolio and Related Allowance for Loan and Lease Losses	The Company’s LHFI portfolio and related ALLL are presented in the following tables: December 31, 2018 Commercial Loans Consumer Loans Total (Dollars in millions) Carrying Value Related ALLL Carrying Value Related Carrying Value Related LHFI evaluated for impairment: Individually evaluated $149 $13 $2,462 $154 $2,611 $167 Collectively evaluated 80,791 1,067 68,274 381 149,065 1,448 Total evaluated 80,940 1,080 70,736 535 151,676 1,615 LHFI measured at fair value — — 163 — 163 — Total LHFI $80,940 $1,080 $70,899 $535 $151,839 $1,615 December 31, 2017 Commercial Loans Consumer Loans Total (Dollars in millions) Carrying Related ALLL Carrying Related Carrying Related LHFI evaluated for impairment: Individually evaluated $173 $21 $2,648 $183 $2,821 $204 Collectively evaluated 75,304 1,080 64,860 451 140,164 1,531 Total evaluated 75,477 1,101 67,508 634 142,985 1,735 LHFI measured at fair value — — 196 — 196 — Total LHFI $75,477 $1,101 $67,704 $634 $143,181 $1,735

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill [Table Text Block]	(Dollars in millions) Consumer Wholesale Total Balance, January 1, 2018 $4,262 $2,069 $6,331 Reallocation related to intersegment transfer of business banking clients 128 (128 ) — Balance, December 31, 2018 $4,390 $1,941 $6,331 Balance, January 1, 2017 $4,262 $2,075 $6,337 Measurement period adjustment related to the acquisition of Pillar — 1 1 Sale of PAC — (7 ) (7 ) Balance, December 31, 2017 $4,262 $2,069 $6,331
Schedule of Finite-Lived Intangible Assets by Major Class [Table Text Block]	Changes in the carrying amount of other intangible assets are presented in the following table: (Dollars in millions) Residential MSRs - Fair Value Commercial Mortgage Servicing Rights and Other Total Balance, January 1, 2018 $1,710 $81 $1,791 Amortization 1 — (18 ) (18 ) Servicing rights originated 336 16 352 Servicing rights purchased 89 — 89 Changes in fair value: Due to changes in inputs and assumptions 2 90 — 90 Other changes in fair value 3 (239 ) — (239 ) Servicing rights sold (3 ) — (3 ) Balance, December 31, 2018 $1,983 $79 $2,062 Balance, January 1, 2017 $1,572 $85 $1,657 Amortization 1 — (20 ) (20 ) Servicing rights originated 394 17 411 Changes in fair value: Due to changes in inputs and assumptions 2 (22 ) — (22 ) Other changes in fair value 3 (226 ) — (226 ) Servicing rights sold (8 ) — (8 ) Other 4 — (1 ) (1 ) Balance, December 31, 2017 $1,710 $81 $1,791 1 Does not include expense associated with community development investments. See Note 12 , “Certain Transfers of Financial Assets and Variable Interest Entities,” for additional information. 2 Primarily reflects changes in option adjusted spreads and prepayment speed assumptions, due to changes in interest rates. 3 Represents changes due to the collection of expected cash flows, net of accretion due to the passage of time. 4 Represents measurement period adjustment on other intangible assets acquired previously in the Pillar
Schedule of intangible assets [Table Text Block]	The gross carrying value and accumulated amortization of other intangible assets are presented in the following table: December 31, 2018 December 31, 2017 (Dollars in millions) Gross Carrying Value Accumulated Amortization Net Carrying Value Gross Carrying Value Accumulated Amortization Net Carrying Value Amortized other intangible assets 1 : Commercial mortgage servicing rights $95 ($29 ) $66 $79 ($14 ) $65 Other 6 (5 ) 1 32 (28 ) 4 Unamortized other intangible assets: Residential MSRs 1,983 — 1,983 1,710 — 1,710 Other 12 — 12 12 — 12 Total other intangible assets $2,096 ($34 ) $2,062 $1,833 ($42 ) $1,791 1
Finite-lived Intangible Assets Amortization Expense [Table Text Block]	The Company’s estimated future amortization of intangible assets at December 31, 2018 is presented in the following table: (Dollars in millions) 2019 $10 2020 8 2021 7 2022 6 2023 5 Thereafter 31 Total 1 $67 1 Does not include indefinite-lived intangible assets of $12 million
Schedule of fees from residential mortgage servicing rights [Table Text Block]	Income earned by the Company on its residential MSRs is derived primarily from contractually specified mortgage servicing fees and late fees, net of curtailment costs, and is presented in the following table. Year Ended December 31 (Dollars in millions) 2018 2017 2016 Income from residential MSRs 1 $437 $403 $366 1 Recognized in Mortgage related income in the Consolidated Statements of Income.
Schedule of Principal Amount Outstanding of Residential Loans Serviced [Table Text Block]	The UPB of residential mortgage loans serviced for third parties is presented in the following table: (Dollars in millions) December 31, 2018 December 31, 2017 UPB of loans underlying residential MSRs $140,801 $136,071
Key Characteristics, Inputs, and Economic Assumptions Used to Estimate the Fair Value of the Company's MSRs	A summary of the significant unobservable inputs used to estimate the fair value of the Company’s residential MSRs and the uncertainty of the fair values in response to 10% and 20% adverse changes in those inputs at the reporting date, are presented in the following table. (Dollars in millions) December 31, 2018 December 31, 2017 Fair value of residential MSRs $1,983 $1,710 Prepayment rate assumption (annual) 13 % 13 % Decline in fair value from 10% adverse change $96 $85 Decline in fair value from 20% adverse change 183 160 Option adjusted spread (annual) 2 % 4 % Decline in fair value from 10% adverse change $44 $47 Decline in fair value from 20% adverse change 86 90 Weighted-average life (in years) 5.5 5.4 Weighted-average coupon 4.0 % 3.9 %
Schedule of fees from commercial mortgage servicing rights [Table Text Block]	The following table presents the Company’s income earned from servicing commercial mortgages. Year Ended December 31 (Dollars in millions) 2018 2017 2016 Income from commercial mortgage servicing rights 1 $26 $22 $1 Income from subservicing third party commercial mortgages 1 13 14 1 1
Schedule of Principal Amount Outstanding of Commercial Loans Serviced [Table Text Block]	The UPB of commercial mortgage loans serviced for third parties is presented in the following table: (Dollars in millions) December 31, 2018 December 31, 2017 UPB of commercial mortgages subserviced for third parties $28,140 $24,294 UPB of loans underlying commercial mortgage servicing rights 6,399 5,760 Total UPB of commercial mortgages serviced for third parties $34,539 $30,054
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]	A summary of the significant unobservable inputs used to estimate the fair value of the Company’s commercial mortgage servicing rights and the uncertainty of the fair values in response to 10% and 20% adverse changes in those inputs at the reporting date, are presented in the following table. (Dollars in millions) December 31, 2018 December 31, 2017 Fair value of commercial mortgage servicing rights $77 $75 Discount rate (annual) 12 % 12 % Decline in fair value from 10% adverse change $3 $3 Decline in fair value from 20% adverse change 6 6 Prepayment rate assumption (annual) 5 % 7 % Decline in fair value from 10% adverse change $1 $1 Decline in fair value from 20% adverse change 2 2 Weighted-average life (in years) 8.1 7.0 Float earnings rate (annual) 1.1 % 1.1 %

Premises, Property, and Equip_2

Premises, Property, and Equipment (Tables)	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment [Table Text Block]	Premises, property, and equipment at December 31 consisted of the following: (Dollars in millions) Useful Life (in years) 2018 2017 Land Indefinite $310 $321 Buildings and improvements 1 - 50 1,059 1,047 Leasehold improvements 1 - 30 758 691 Furniture and equipment 1 - 20 1,429 1,430 Software 1 1 - 5 1,890 1,671 Construction and software in progress 351 488 Total premises, property, and equipment 5,797 5,648 Less: Accumulated depreciation and amortization 3,773 3,595 Premises, property, and equipment, net $2,024 $2,053 1
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	The following table presents future minimum payments under noncancelable operating leases with initial terms in excess of one year at December 31, 2018 : (Dollars in millions) Operating Leases 2019 $204 2020 195 2021 186 2022 171 2023 148 Thereafter 585 Total minimum lease payments $1,489

Other Assets (Tables)

Other Assets (Tables)	12 Months Ended
	Dec. 31, 2018
Other Assets Disclosure [Abstract]
Schedule of Other Assets [Table Text Block]	The components of other assets are presented in the following table: (Dollars in millions) December 31, 2018 December 31, 2017 Equity securities 1 : Marketable equity securities 2 : Mutual fund investments $79 $49 Other equity 3 16 7 Nonmarketable equity securities: Federal Reserve Bank stock 2 403 403 FHLB stock 2 227 15 Other equity 3 68 26 Lease assets 1,940 1,528 Tax credit investments 4 1,722 1,272 Bank-owned life insurance 1,627 1,411 Accrued income 1,106 880 Accounts receivable 602 2,201 Pension assets, net 484 464 Prepaid expenses 231 319 OREO 54 57 Other 5 432 467 Total other assets $8,991 $9,099 1 Does not include equity securities held for trading purposes classified as Trading assets and derivative instruments or Trading liabilities and derivative instruments on the Company’s Consolidated Balance Sheets. See Note 5 , “Trading Assets and Liabilities and Derivative Instruments,” for more information. 2 Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability . 3 During the second quarter of 2018, the Company reclassified $22 million of equity securities from nonmarketable to marketable equity securities due to readily determinable fair value information observed in active markets. 4 See Note 12 , “Certain Transfers of Financial Assets and Variable Interest Entities,” for additional information. 5
Schedule of Gains/(Losses) from Equity Securities [Table Text Block]	The following table summarizes net gains/(losses) for equity securities not classified as trading assets: (Dollars in millions) Year Ended December 31, 2018 Net (losses)/gains from marketable equity securities 1 ($2 ) Net gains/(losses) from nonmarketable equity securities: Remeasurement losses and impairment — Remeasurement gains 1 30 Less: Net realized gains from sale — Total net unrealized gains from non-trading equity securities $28 1

Certain Transfers of Financia_2

Certain Transfers of Financial Assets and Variable Interest Entities (Tables)	12 Months Ended
	Dec. 31, 2018
Certain Transfers of Financial Assets and Variable Interest Entities [Abstract]
Community Development Tax Credits and Amortization [Table Text Block]	The following table presents tax credits and amortization associated with the Company’s investments in community development investments: Tax Credits Amortization Year Ended December 31 Year Ended December 31 (Dollars in millions) 2018 2017 2016 2018 2017 2016 Qualified affordable housing partnerships $121 $108 $92 $127 $109 $87 Other community development investments 89 90 64 71 70 46
Quantitative Information about Transferred Financial Assets that have been Derecognized and Other Financial Assets Managed Together [Table Text Block]	The Company's total managed loans, including the LHFI portfolio and other transferred loans (securitized and unsecuritized), are presented in the following table by portfolio balance and delinquency status (accruing loans 90 days or more past due and all nonaccrual loans) at December 31, 2018 and 2017 , as well as the related net charge-offs for the years ended December 31, 2018 and 2017 . Portfolio Balance Past Due and Nonaccrual Net Charge-offs December 31, 2018 December 31, 2017 December 31, 2018 December 31, 2017 Year Ended December 31 (Dollars in millions) 2018 2017 LHFI portfolio: Commercial $80,940 $75,477 $175 $247 $107 $127 Consumer 70,899 67,704 2,003 1,832 231 240 Total LHFI portfolio 151,839 143,181 2,178 2,079 338 367 Managed securitized loans: Commercial 1 6,399 5,760 — — — — Consumer 139,809 134,160 146 171 5 2 8 2 Total managed securitized loans 146,208 139,920 146 171 5 8 Managed unsecuritized loans 3 1,134 2,200 152 340 — — Total managed loans $299,181 $285,301 $2,476 $2,590 $343 $375 1 Comprised of commercial mortgages sold through Fannie Mae , Freddie Mac , and Ginnie Mae securitizations, whereby servicing has been retained by the Company. 2 Amounts associated with $387 million and $602 million of managed securitized loans at December 31, 2018 and 2017 , respectively. Net charge-off data is not reported to the Company for the remaining balance of $139.4 billion and $133.6 billion of managed securitized loans at December 31, 2018 and 2017 , respectively. 3
Tax Credit Variable Interest Entities [Table Text Block]	The following table provides information related to the Company's investments in tax credit VIEs that it does not consolidate: Community Development Investments Renewable Energy Partnerships (Dollars in millions) December 31, 2018 December 31, 2017 December 31, 2018 December 31, 2017 Carrying value of investments 1 $1,636 $1,272 $86 $— Maximum exposure to loss related to investments 2 2,207 1,905 138 — 1 At December 31, 2018 and 2017 , the carrying value of community development investments excludes $68 million and $59 million of investments in funds that do not qualify for tax credits, respectively. 2 At December 31, 2018 and 2017 , the Company's maximum exposure to loss related to community development investments includes $422 million and $354 million of loans and $639 million and $627 million of unfunded equity commitments, respectively. At December 31, 2018 , the Company's maximum exposure to loss related to renewable energy partnerships includes $52 million

Borrowings and Contractual Co_2

Borrowings and Contractual Commitments (Tables)	12 Months Ended
	Dec. 31, 2018
Short-term Debt [Line Items]
Schedule of Short-term Debt [Table Text Block]	Short-term borrowings at December 31 consisted of the following: 2018 2017 (Dollars in millions) Balance Interest Rate Balance Interest Rate Funds purchased $2,141 2.40 % $2,561 1.33 % Securities sold under agreements to repurchase 1,774 2.58 1,503 1.39 Other short-term borrowings: FHLB advances 4,000 2.53 — Dealer collateral 503 2.40 367 1.33 Master notes 354 1.40 350 0.66 Total other short-term borrowings 4,857 2.44 717 1.00 Total short-term borrowings $8,772 2.46 % $4,781 1.30 %
Debt Instrument [Line Items]
Schedule of Long-term Debt Instruments [Table Text Block]	Long-term debt at December 31 consisted of the following: 2018 2017 (Dollars in millions) Maturity Date(s) Interest Rate(s) Balance Balance Parent Company: Senior, fixed rate 2019 - 2028 2.50% - 6.00% $3,467 $3,353 Senior, floating rate 2019 2.69 51 51 Subordinated, fixed rate 2026 6.00 200 200 Junior subordinated, floating rate 2027 - 2028 3.29 - 3.44 627 628 Structured notes 1 2019 - 2026 200 242 Total 4,545 4,474 Less: Debt issuance costs 9 8 Total Parent Company debt 4,536 4,466 Subsidiaries 2 : Senior, fixed rate 3 2019 - 2058 0.69 - 9.55 6,238 3,609 Senior, floating rate 2020 - 2043 1.04 - 3.15 1,085 512 Senior, fixed-to-floating rate 2021 - 2024 2.59 - 3.69 2,364 — Subordinated, fixed rate 2020 - 2026 3.30 - 5.40 864 1,206 Total 10,551 5,327 Less: Debt issuance costs 15 8 Total subsidiaries debt 10,536 5,319 Total long-term debt 4 $15,072 $9,785 1 Consists of notes with various terms that include fixed or floating interest, or returns that are linked to an equity index. 2 82% and 77% of total subsidiary debt was issued by the Bank as of December 31, 2018 and 2017 , respectively. 3 Includes leases and other obligations that do not have a stated interest rate. 4 Includes $289 million and $530 million of long-term debt measured at fair value at December 31, 2018 and 2017
Schedule of Maturities of Long-term Debt [Table Text Block]	Maturities of long-term debt at December 31, 2018 were as follows: (Dollars in millions) Parent Company Subsidiaries 2019 $792 $1,026 2020 — 1,496 2021 1,039 1,652 2022 984 1,800 2023 12 1,095 Thereafter 1,718 3,482 Total maturities 4,545 10,551 Less: Debt issuance costs 9 15 Total long-term debt $4,536 $10,536
Schedule of Long-Term Debt Issuances [Table Text Block]	The Company’s issuances of long-term debt during 2018 are summarized in the following table: 2018 Debt Issuances Principal Amount (Dollars in millions) Parent Company: 7-year fixed rate senior notes $850 Subsidiaries: 3-year fixed-to-floating rate senior notes 750 3-year fixed-to-floating rate senior notes 600 7-year fixed rate senior notes 500 6-year fixed-to-floating rate senior notes 500 5-year fixed rate senior notes 500 4-year fixed-to-floating rate senior notes 500 4-year floating rate senior notes 300 3-year floating rate senior notes 300 Total $4,800

Borrowings and Contractual Co_3

Borrowings and Contractual Commitments Contractual Commitments (Tables)	12 Months Ended
	Dec. 31, 2018
Contractual Commitments [Abstract]
Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block]	Payments Due by Period at December 31, 2018 (Dollars in millions) 2019 2020 2021 2022 2023 Thereafter Total Unfunded lending commitments $26,122 $8,670 $11,495 $14,678 $22,421 $12,538 $95,924 Consumer and other time deposits 1, 2 7,781 3,262 758 918 363 2,273 15,355 Brokered time deposits 1 168 238 241 194 152 52 1,045 Purchase obligations 3 249 234 63 64 58 244 912 Commitments to fund tax credit investments 4 702 — — — — — 702 1 Amounts do not include interest. 2 The aggregate amount of time deposit accounts in denominations of $250,000 or more was $4.5 billion and $3.2 billion at December 31, 2018 and 2017 , respectively. 3 For legally binding purchase obligations of $5 million or more, amounts include either termination fees under the associated contracts when early termination provisions exist, or the total potential obligation over the full contractual term for noncancelable purchase obligations. Payments made towards the purchase of goods or services under these contracts totaled $499 million , $395 million , and $236 million in 2018, 2017, and 2016 , respectively. 4 Commitments to fund investments in affordable housing and other partnerships do not have defined funding dates as certain criteria must be met before the Company is obligated to fund. Accordingly, these commitments are considered to be due on demand for presentation purposes. See Note 12 , “Certain Transfers of Financial Assets and Variable Interest Entities,” for additional information.

Net Income Per Common Share (Ta

Net Income Per Common Share (Tables)	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Reconciliation of Net Income/(Loss) to Net Income/(Loss) Available to Common Shareholders	Year Ended December 31 (Dollars and shares in millions, except per share data) 2018 2017 2016 Net income $2,775 $2,273 $1,878 Less: Preferred stock dividends (107 ) (94 ) (66 ) Dividends and undistributed earnings allocated to unvested common share awards — — (1 ) Net income available to common shareholders $2,668 $2,179 $1,811 Average common shares outstanding - basic 460.9 481.3 498.6 Add dilutive securities: RSUs 2.9 3.0 2.9 Common stock warrants, options, and restricted stock 1.2 2.7 2.0 Average common shares outstanding - diluted 465.0 487.0 503.5 Net income per average common share - diluted $5.74 $4.47 $3.60 Net income per average common share - basic 5.79 4.53 3.63

Capital (Tables)

Capital (Tables)	12 Months Ended
	Dec. 31, 2018
Class of Stock [Line Items]
Dividends Declared [Table Text Block]	Year Ended December 31 (Dollars in millions, except per share data) 2018 2017 2016 Common stock: Dividends declared $826 $634 $498 Dividends declared per share 1.80 1.32 1.00 Preferred stock: Dividends declared $107 $94 $66 Dividends declared per share: Series A 4,056 4,056 4,067 Series B 4,056 4,056 4,067 Series E 1 1,469 5,875 5,875 Series F 5,625 5,625 5,625 Series G 5,050 3,128 — Series H 5,566 669 — 1 All 4,500
Assets Subject to Regulatory Capital Requirements	2018 2017 (Dollars in millions) Amount Ratio Amount Ratio SunTrust Banks, Inc. CET1 $17,258 9.21 % $17,141 9.74 % Tier 1 capital 19,306 10.30 19,622 11.15 Total capital 22,517 12.02 23,028 13.09 Leverage 9.26 9.80 SunTrust Bank CET1 $20,137 11.01 % $19,474 11.29 % Tier 1 capital 20,160 11.02 19,496 11.31 Total capital 22,564 12.33 22,132 12.83 Leverage 9.95 9.97
Preferred Stock [Table Text Block]	(Dollars in millions) 2018 2017 2016 Series A $172 $172 $172 Series B 103 103 103 Series E 1 — 450 450 Series F 500 500 500 Series G 750 750 — Series H 500 500 — Total preferred stock $2,025 $2,475 $1,225 1 All 4,500
Schedule of Stock by Class	The following table presents information related to the Company’s preferred stock outstanding at December 31, 2018 : Preferred 1 Stock Issue Date Number of Shares Authorized Number of Shares Issued Number of Shares Outstanding Dividend Dates Annual Per 2 Share Dividend Rate Optional Redemption Date Redemption Price Per Share Series A 9/12/2006 5,000 5,000 1,725 Quarterly beginning on December 15, 2006 Greater of 3-month LIBOR plus 0.53% per annum or 4.00% 9/15/2011 $100,000 Series B 12/15/2011 5,010 1,025 1,025 Quarterly beginning on March 15, 2012 Greater of 3-month LIBOR plus 0.645% per annum or 4.00% 12/15/2011 100,000 Series F 11/7/2014 5,000 5,000 5,000 Semi-annually beginning on June 15, 2015 until December 15, 2019 5.625% until December 15, 2019 12/15/2019 3 100,000 Quarterly beginning on March 15, 2020 3-month LIBOR plus 3.86% per annum beginning on March 15, 2020 Series G 5/2/2017 7,500 7,500 7,500 Semi-annually beginning on December 15, 2017 until June 15, 2022 5.05% until June 15, 2022 6/15/2022 3 100,000 Quarterly beginning on September 15, 2022 3-month LIBOR plus 3.102% per annum beginning on September 15, 2022 Series H 11/14/2017 5,000 5,000 5,000 Semi-annually beginning on June 15, 2018 until December 15, 2027 5.125% until December 15, 2027 12/15/2027 3 100,000 Quarterly beginning on March 15, 2028 3-month LIBOR plus 2.786% per annum beginning on March 15, 2028 1 All series of preferred stock have no par value, $100,000 liquidation preference per share, and no voting rights. 2 Dividends on the shares are noncumulative. 3

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	The components of the Provision for income taxes included in the Consolidated Statements of Income for the years ended December 31 are presented in the following table: (Dollars in millions) 2018 2017 2016 Current income tax provision: Federal $562 $129 $667 State 73 59 27 Total 635 188 694 Deferred income tax (benefit)/provision: Federal (122 ) 275 59 State 35 69 52 Total (87 ) 344 111 Total provision for income taxes $548 $532 $805
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	A reconciliation of the income tax provision at the statutory federal income tax rate to the Company’s actual provision for income taxes and actual effective tax rate for the years ended December 31 are presented in the following table: 2018 2017 2016 (Dollars in millions) Amount % of Pre-Tax Income Amount % of Pre-Tax Income Amount % of Income tax provision at federal statutory rate $698 21.0 % $982 35.0 % $939 35.0 % Increase/(decrease) resulting from: State income taxes, net 85 2.6 92 3.3 59 2.2 Tax-exempt interest (67 ) (2.0 ) (90 ) (3.2 ) (86 ) (3.2 ) Income tax credits, net of amortization 1 (106 ) (3.2 ) (117 ) (4.2 ) (86 ) (3.2 ) Impact of the remeasurement of DTAs and DTLs and other tax reform-related items (55 ) (1.7 ) (303 ) (10.8 ) — — Other 2 (7 ) (0.2 ) (32 ) (1.1 ) (21 ) (0.8 ) Total provision for income taxes and effective tax rate $548 16.5 % $532 19.0 % $805 30.0 % 1 Excludes income tax benefits of $84 million , $34 million , and $1 million for the years ended December 31, 2018, 2017, and 2016 , respectively, related to tax credits, which were recognized as a reduction to the related investment asset. 2 Includes excess tax benefits of $22 million , $25 million , and $15 million for the years ended December 31, 2018, 2017, and 2016 , respectively, related to the Company's adoption of ASU 2016-09.
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	The significant DTA s and DTL s at December 31 , net of the federal impact for state taxes, are presented in the following table: (Dollars in millions) 2018 2017 DTAs: ALLL $376 $412 Net unrealized losses in AOCI 438 302 State NOLs and other carryforwards 111 227 Accruals and reserves 145 180 Other 21 17 Total gross DTAs 1,091 1,138 Valuation allowance (85 ) (143 ) Total DTAs 1,006 995 DTLs: Leasing 475 459 Servicing rights 270 290 Employee compensation and benefits 140 210 Deferred income 29 193 Goodwill and other intangible assets 156 155 Premises, property, and equipment 149 111 Loans 96 104 Other 38 41 Total DTLs 1,353 1,563 Net DTL ($347 ) ($568 )
Summary of Income Tax Contingencies [Table Text Block]	The following table provides a rollforward of the Company's gross federal and state UTB s, excluding interest and penalties, during the years ended December 31 : (Dollars in millions) 2018 2017 Balance at January 1 $141 $111 Increases in UTBs related to prior years 2 22 Decreases in UTBs related to prior years (6 ) (5 ) Increases in UTBs related to the current year 20 13 Decreases in UTBs related to settlements (2 ) — Decreases in UTBs related to lapse of the applicable statutes of limitations (10 ) — Balance at December 31 $145 $141

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2018
Employee Benefit Plans [Abstract]
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]	The following table presents a summary of stock options, restricted stock, and RSU activity for the year ended December 31, 2018 : Stock Options Restricted Stock RSUs (Dollars in millions, except per share data) Shares Price Weighted Shares Deferred Weighted Shares Weighted Balance, January 1, 2018 1,659,305 $9.06 - 64.58 $35.33 8,744 $1 $57.19 4,153,719 $44.68 Granted — — — 7,404 1 67.53 2,709,623 67.95 Exercised/distributed (774,704 ) 9.06 - 64.58 46.72 (8,744 ) — 57.19 (1,808,091 ) 42.84 Cancelled/expired/forfeited — — — — — — (241,722 ) 59.62 Amortization of restricted stock compensation — — — — (1 ) — — — Balance, December 31, 2018 884,601 $21.67 - 32.27 $25.36 7,404 $1 $67.53 4,813,529 $56.63 Exercisable, December 31, 2018 884,601 $25.36
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]	The following table presents stock option information at December 31, 2018 : Options Outstanding Options Exercisable (Dollars in millions, except per share data) Number December 31, 2018 Weighted Weighted Total Number December 31, 2018 Weighted Weighted Total Range of Exercise Prices: $21.67 to 32.27 884,601 $25.36 3 $22 884,601 $25.36 3 $22
Share-based Compensation Arrangements by Share-based Payment Award, Restricted Stock Units, Vested and Expected to Vest [Table Text Block]	Additional option and stock-based compensation information at December 31 is presented in the following table: (Dollars in millions) 2018 2017 2016 Intrinsic value of options exercised 1 $17 $28 $43 Fair value of vested restricted shares 1 1 — 41 Fair value of vested RSUs 1 77 62 74 1
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]	Stock-based compensation expense recognized in Employee compensation in the Consolidated Statements of Income consisted of the following: Years Ended December 31 (Dollars in millions) 2018 2017 2016 RSUs $104 $83 $56 Phantom stock units 1 35 77 67 Restricted stock 1 — 2 Total stock-based compensation expense $140 $160 $125 Stock-based compensation tax benefit 2 $34 $61 $48 1 Phantom stock units are settled in cash. The Company paid $76 million , $80 million , and $28 million during the years ended December 31, 2018, 2017, and 2016 , respectively, related to these share-based liabilities. 2 Does not include excess tax benefits or deficiencies recognized in the Provision for income taxes in the Consolidated Statements of Income.
Schedule of Accumulated and Projected Benefit Obligations [Table Text Block]	The following table presents the change in benefit obligations, change in fair value of plan assets, funded status, accumulated benefit obligation, and the weighted average discount rate related to the Company's pension and other postretirement benefits plans for the years ended December 31 : Pension Benefits 1 Other Postretirement Benefits (Dollars in millions) 2018 2017 2018 2017 Benefit obligation, beginning of year $2,910 $2,747 $58 $58 Service cost 6 5 — — Interest cost 91 95 1 1 Plan participants’ contributions — — 5 4 Actuarial (gain)/loss (228 ) 225 (2 ) (1 ) Benefits paid (178 ) (156 ) (11 ) (8 ) Administrative expenses paid from pension trust (6 ) (6 ) — — Plan amendments — — — (5 ) Special termination benefits — — — 9 Settlement loss (127 ) — — — Benefit obligation, end of year 2 $2,468 $2,910 $51 $58 Change in plan assets: Fair value of plan assets, beginning of year $3,288 $3,016 $164 $157 Actual return on plan assets (100 ) 425 (3 ) 11 Employer contributions 3 8 9 — — Plan participants’ contributions — — 5 4 Benefits paid (178 ) (156 ) (11 ) (8 ) Administrative expenses paid from pension trust (6 ) (6 ) — — Settlement loss (127 ) — — — Fair value of plan assets, end of year $2,885 $3,288 $155 $164 Funded status at end of year 4, 5 $417 $378 $104 $106 Funded status at end of year (%) 117 % 113 % Accumulated benefit obligation $2,468 $2,910 Discount rate 4.27 % 3.62 % 3.96 % 3.29 % 1 Employer contributions represent the benefits that were paid to nonqualified plan participants. Unfunded nonqualified supplemental pension plans are not funded through plan assets. 2 Includes $68 million and $78 million of benefit obligations for the unfunded nonqualified supplemental pension plans at December 31, 2018 and 2017 , respectively. 3 The Company contributed less than $1 million to the other postretirement benefits plans during both 2018 and 2017 . 4 Pension benefits included assets of $485 million and $456 million , and liabilities of $68 million and $78 million , at December 31, 2018 and 2017 , respectively, recorded in Other assets in the Consolidated Balance Sheets. 5 Other postretirement benefits included assets of $104 million and $106 million at December 31, 2018 and 2017 , respectively, recorded in Other assets in the Consolidated Balance Sheets.
Schedule of Net Benefit Costs [Table Text Block]	Components of net periodic benefit related to the Company's pension and other postretirement benefits plans for the years ended December 31 are presented in the following table and are recognized in Employee benefits in the Consolidated Statements of Income: Pension Benefits 1 Other Postretirement Benefits (Dollars in millions) 2018 2017 2016 2018 2017 2016 Service cost $6 $5 $5 $— $— $— Interest cost 91 95 97 1 1 2 Expected return on plan assets (187 ) (195 ) (186 ) (5 ) (5 ) (5 ) Amortization of prior service credit — — — (6 ) (6 ) (6 ) Amortization of actuarial loss 22 25 25 — — — Deferred losses related to NCF Retirement Plan settlement 60 — — — — — Other — — — — 9 — Net periodic benefit ($8 ) ($70 ) ($59 ) ($10 ) ($1 ) ($9 ) Weighted average assumptions used to determine net periodic benefit: Discount rate 3.62 % 4.18 % 4.44 % 3.29 % 3.70 % 3.95 % Expected return on plan assets 5.90 6.66 6.68 3.10 3.12 3.13 Interest crediting rate 3.00 3.11 3.00 N/A 2 N/A 2 N/A 2 1 Administrative fees are recognized in service cost for each of the periods presented. 2 Other postretirement benefits plans do not include any plans with promised interest crediting rates; thus the weighted-average interest crediting rate assumption is not applicable ("N/A") for other postretirement benefit plans for all periods presented.
Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]	Components of the benefit obligations AOCI balance at December 31 were as follows: Pension Benefits Other Postretirement Benefits (Dollars in millions) 2018 2017 2018 2017 Prior service credit $— $— ($52 ) ($58 ) Net actuarial loss/(gain) 978 1,001 (17 ) (22 ) Total AOCI, pre-tax $978 $1,001 ($69 ) ($80 ) Other changes in plan assets and benefit obligations recognized in AOCI during 2018 were as follows: (Dollars in millions) Pension Benefits Other Postretirement Benefits Current year actuarial loss $59 $5 Amortization of prior service credit — 6 Amortization of actuarial loss (22 ) — Deferred losses related to NCF Retirement Plan settlement (60 ) — Total recognized in AOCI, pre-tax ($23 ) $11 Total recognized in net periodic (benefit)/loss and AOCI, pre-tax ($31 ) $1
Schedule of Allocation of Plan Assets [Table Text Block]	The following tables present combined pension and other postretirement benefit plan assets measured at fair value. See Note 20 , "Fair Value Election and Measurement," for level definitions within the fair value hierarchy. Fair Value Measurements at December 31, 2018 1 (Dollars in millions) Total Level 1 Level 2 Level 3 Money market funds 2 $112 $112 $— $— Equity securities 382 382 — — Mutual funds 3 : Equity index fund 46 46 — — Tax exempt municipal bond funds 86 86 — — Taxable fixed income index funds 12 12 — — Derivatives, net of collateral 2 — 2 — Fixed income securities 2,377 333 2,044 — Total plan assets $3,017 $971 $2,046 $— 1 Fair value measurements do not include pension benefits accrued income amounting to less than 0.9% of total plan assets. 2 Includes $11 million for other postretirement benefit plans. 3 Relates exclusively to other postretirement benefit plans. Fair Value Measurements at December 31, 2017 1 (Dollars in millions) Total Level 1 Level 2 Level 3 Money market funds 2 $138 $138 $— $— Equity securities 936 936 — — Mutual funds 3 : Equity index fund 56 56 — — Tax exempt municipal bond funds 85 85 — — Taxable fixed income index funds 12 12 — — Derivatives, net of collateral (5 ) (5 ) — — Fixed income securities 2,201 512 1,689 — Other assets 9 9 — — Total plan assets $3,432 $1,743 $1,689 $— 1 Fair value measurements do not include pension benefits accrued income amounting to less than 0.7% of total plan assets. 2 Includes $11 million for other postretirement benefit plans. 3 Relates exclusively to other postretirement benefit plans. Target allocations for pension and other postretirement benefits at December 31, by asset category, are presented below: Pension Benefits Other Postretirement Benefits 2018 Target Allocation % of plan assets 2018 Target Allocation % of plan assets 2018 2017 2018 2017 Cash equivalents 0-10 % 4 % 4 % 5-15 % 7 % 7 % Equity securities 0-25 13 29 20-40 30 34 Debt securities 75-100 83 67 50-70 63 59 Total 100 % 100 % 100 % 100 %
Schedule of Expected Benefit Payments [Table Text Block]	Expected cash flows for the pension and other postretirement benefit plans are presented in the following table: (Dollars in millions) Pension Benefits 1 Other Postretirement Benefits (excluding Medicare Subsidy) 2 Employer Contributions: 2019 (expected) to plan trusts $— $— 2019 (expected) to plan participants 3 7 — Expected Benefit Payments: 2019 175 6 2020 161 6 2021 161 6 2022 159 5 2023 159 4 2024 - 2028 773 16 1 Based on the funding status and ERISA limitations, the Company anticipates contributions to the Retirement Plan will not be required during 2019 . 2 Expected payments under other postretirement benefit plans are shown net of participant contributions. 3 The expected benefit payments for the SERP

Guarantees (Tables)

Guarantees (Tables)	12 Months Ended
	Dec. 31, 2018
Guarantees [Abstract]
Mortgage Loan Repurchase Losses [Table Text Block]	The following table summarizes the changes in the Company’s reserve for residential mortgage loan repurchases: Year Ended December 31 (Dollars in millions) 2018 2017 2016 Balance, beginning of period $39 $40 $57 Repurchase (benefit)/provision (9 ) — (17 ) Charge-offs, net of recoveries (4 ) (1 ) — Balance, end of period $26 $39 $40
Repurchased Mortgage Loan [Table Text Block]	The following table summarizes the carrying value of the Company’s outstanding repurchased residential mortgage loans: (Dollars in millions) December 31, 2018 December 31, 2017 Outstanding repurchased residential mortgage loans: Performing LHFI $183 $203 Nonperforming LHFI 16 16 Total carrying value of outstanding repurchased residential mortgages $199 $219

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments [Table Text Block]	The following table presents the Company’s derivative positions at December 31, 2018 and 2017 . The notional amounts in the table are presented on a gross basis at December 31, 2018 and 2017 . Gross positive and gross negative fair value amounts associated with respective notional amounts are presented without consideration of any netting agreements, including collateral arrangements. Net fair value derivative amounts are adjusted on an aggregate basis, where applicable, to take into consideration the effects of legally enforceable master netting agreements, including any cash collateral received or paid, and are recognized in Trading assets and derivative instruments or Trading liabilities and derivative instruments on the Consolidated Balance Sheets . December 31, 2018 December 31, 2017 Fair Value Fair Value (Dollars in millions) Notional Amounts Asset Derivatives Liability Derivatives Notional Amounts Asset Derivatives Liability Derivatives Derivative instruments designated in hedging relationships Cash flow hedges: 1 Interest rate contracts hedging floating rate LHFI $10,500 $1 $2 $14,200 $2 $252 Subtotal 10,500 1 2 14,200 2 252 Fair value hedges: 2 Interest rate contracts hedging fixed rate debt 9,550 1 1 5,920 1 58 Interest rate contracts hedging brokered time deposits 59 — — 60 — — Subtotal 9,609 1 1 5,980 1 58 Derivative instruments not designated as hedging instruments 3 Interest rate contracts hedging: Residential MSRs 4 28,011 54 10 42,021 119 119 LHFS, IRLCs 5 4,891 18 38 7,590 9 6 LHFI 159 — — 175 2 2 Trading activity 6 127,286 771 687 126,366 1,066 946 Foreign exchange rate contracts hedging loans and trading activity 9,824 129 119 7,058 110 102 Credit contracts hedging: LHFI 830 — 14 515 — 11 Trading activity 7 4,058 97 95 3,454 15 12 Equity contracts hedging trading activity 6 34,471 1,447 1,644 38,907 2,499 2,857 Other contracts: IRLCs and other 8 1,393 20 15 2,017 18 16 Commodity derivatives 2,020 93 91 1,422 63 61 Subtotal 212,943 2,629 2,713 229,525 3,901 4,132 Total derivative instruments $233,052 $2,631 $2,716 $249,705 $3,904 $4,442 Total gross derivative instruments (before netting) $2,631 $2,716 $3,904 $4,442 Less: Legally enforceable master netting agreements (1,654 ) (1,654 ) (2,731 ) (2,731 ) Less: Cash collateral received/paid (338 ) (652 ) (371 ) (1,303 ) Total derivative instruments (after netting) $639 $410 $802 $408 1 See “Cash Flow Hedging” in this Note for further discussion. 2 See “Fair Value Hedging” in this Note for further discussion. 3 See “Economic Hedging Instruments and Trading Activities” in this Note for further discussion. 4 Notional amounts include $921 million and $16.6 billion related to interest rate futures at December 31, 2018 and 2017 , respectively. These futures contracts settle in cash daily, one day in arrears. The derivative asset or liability associated with the one day lag is included in the fair value column of this table. 5 Notional amounts include $116 million and $190 million related to interest rate futures at December 31, 2018 and 2017 , respectively. These futures contracts settle in cash daily, one day in arrears. The derivative asset or liability associated with the one day lag is included in the fair value column of this table. 6 Notional amounts include $1.2 billion and $9.8 billion related to interest rate futures at December 31, 2018 and 2017 , and $136 million and $1.2 billion related to equity futures at December 31, 2018 and 2017 , respectively. These futures contracts settle in cash daily, one day in arrears. The derivative asset or liability associated with the one day lag is included in the fair value column of this table. Notional amounts also include amounts related to interest rate swaps hedging fixed rate debt. 7 Notional amounts include $6 million and $4 million from purchased credit risk participation agreements at December 31, 2018 and December 31, 2017 , and $33 million and $11 million from written credit risk participation agreements at December 31, 2018 and December 31, 2017 , respectively. These notional amounts are calculated as the notional of the derivative participated adjusted by the relevant RWA conversion factor. 8 Notional amounts include $41 million and $49 million related to the Visa derivative liability at December 31, 2018 and December 31, 2017 , respectively. See Note 18 , "Gua
Netting of Financial Instruments - Derivatives [Table Text Block]	The following tables present total gross derivative instrument assets and liabilities at December 31, 2018 and 2017 , which are adjusted to reflect the effects of legally enforceable master netting agreements and cash collateral received or paid when calculating the net amount reported in the Consolidated Balance Sheets. Also included in the tables are financial instrument collateral related to legally enforceable master netting agreements that represents securities collateral received or pledged and customer cash collateral held at third party custodians. These amounts are not offset on the Consolidated Balance Sheets but are shown as a reduction to total derivative instrument assets and liabilities to derive net derivative assets and liabilities. These amounts are limited to the derivative asset/liability balance, and accordingly, do not include excess collateral received/pledged. (Dollars in millions) Gross Amount Amount Offset Net Amount Presented in Consolidated Balance Sheets Held/Pledged Financial Instruments Net Amount December 31, 2018 Derivative instrument assets: Derivatives subject to master netting arrangement or similar arrangement $2,425 $1,873 $552 $12 $540 Derivatives not subject to master netting arrangement or similar arrangement 20 — 20 — 20 Exchange traded derivatives 186 119 67 — 67 Total derivative instrument assets $2,631 $1,992 $639 1 $12 $627 Derivative instrument liabilities: Derivatives subject to master netting arrangement or similar arrangement $2,521 $2,187 $334 $14 $320 Derivatives not subject to master netting arrangement or similar arrangement 76 — 76 — 76 Exchange traded derivatives 119 119 — — — Total derivative instrument liabilities $2,716 $2,306 $410 2 $14 $396 December 31, 2017 Derivative instrument assets: Derivatives subject to master netting arrangement or similar arrangement $3,491 $2,923 $568 $28 $540 Derivatives not subject to master netting arrangement or similar arrangement 18 — 18 — 18 Exchange traded derivatives 395 179 216 — 216 Total derivative instrument assets $3,904 $3,102 $802 1 $28 $774 Derivative instrument liabilities: Derivatives subject to master netting arrangement or similar arrangement $4,128 $3,855 $273 $27 $246 Derivatives not subject to master netting arrangement or similar arrangement 130 — 130 — 130 Exchange traded derivatives 184 179 5 — 5 Total derivative instrument liabilities $4,442 $4,034 $408 2 $27 $381 1 At December 31, 2018 , $639 million , net of $338 million offsetting cash collateral, is recognized in Trading assets and derivative instruments within the Company's Consolidated Balance Sheets. At December 31, 2017 , $802 million , net of $371 million offsetting cash collateral, is recognized in Trading assets and derivative instruments within the Company's Consolidated Balance Sheets. 2 At December 31, 2018 , $410 million , net of $652 million offsetting cash collateral, is recognized in Trading liabilities and derivative instruments within the Company's Consolidated Balance Sheets. At December 31, 2017 , $408 million , net of $1.3 billion
Derivative Instruments, Gain (Loss) [Table Text Block]	Pursuant to the adoption of ASU 2017-12, the following table presents gains and losses on derivatives in fair value and cash flow hedging relationships by contract type and by income statement line item for the year ended December 31, 2018 . For the years ended December 31 , 2017 and 2016 , the amounts presented below were not conformed to the new hedge accounting guidance. The table does not disclose the financial impact of the activities that these derivative instruments are intended to hedge. Net Interest Income Noninterest Income (Dollars in millions) Interest and fees on LHFI Interest on Long-term Debt Interest on Deposits Trading Income Total Year Ended December 31, 2018 Interest income/(expense), including the effects of fair value and cash flow hedges $6,058 ($375 ) ($711 ) $161 $5,133 (Loss)/gain on fair value hedging relationships: Interest rate contracts: Amounts related to interest settlements on derivatives $— ($1 ) $— $— ($1 ) Recognized on derivatives — (24 ) — — (24 ) Recognized on hedged items — 11 1 — — 11 Net expense recognized on fair value hedges $— ($14 ) $— $— ($14 ) Loss on cash flow hedging relationships: Interest rate contracts: Amount of pre-tax loss reclassified from AOCI into income ($72 ) 2 $— $— $— ($72 ) Net expense recognized on cash flow hedges ($72 ) $— $— $— ($72 ) Year Ended December 31, 2017 Interest income/(expense), including the effects of fair value and cash flow hedges $5,385 ($288 ) ($404 ) $189 $4,882 Gain/(loss) on fair value hedging relationships: Interest rate contracts: Amounts related to interest settlements on derivatives $— $15 $— $— $15 Recognized on derivatives — — — (38 ) (38 ) Recognized on hedged items — — — 40 40 Net income recognized on fair value hedges $— $15 $— $2 $17 Gain on cash flow hedging relationships: Interest rate contracts: Amount of pre-tax gain reclassified from AOCI into income $89 2 $— $— $— $89 Net income recognized on cash flow hedges $89 $— $— $— $89 Year Ended December 31, 2016 Interest income/(expense), including the effects of fair value and cash flow hedges $4,939 ($260 ) ($259 ) $211 $4,631 Gain/(loss) on fair value hedging relationships: Interest rate contracts: Amounts related to interest settlements on derivatives $— $17 $— $— $17 Recognized on derivatives — — — (87 ) (87 ) Recognized on hedged items — — — 89 89 Net income recognized on fair value hedges $— $17 $— $2 $19 Gain on cash flow hedging relationships: Interest rate contracts: Amount of pre-tax gain reclassified from AOCI into income $244 2 $— $— $— $244 Net income recognized on cash flow hedges $244 $— $— $— $244 1 Includes amortization from de-designated fair value hedging relationships. 2
Hedged Items in Fair Value Hedging Relationships [Table Text Block]	The following table presents the carrying amount of hedged liabilities on the Consolidated Balance Sheets in fair value hedging relationships and the associated cumulative basis adjustment related to the application of hedge accounting: Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of Hedged Liabilities (Dollars in millions) Carrying Amount of Hedged Liabilities Hedged Items Currently Designated Hedged Items No Longer Designated December 31, 2018 Long-term debt $8,411 ($10 ) ($120 ) Brokered time deposits 29 — —
Derivative Instruments not Designated as Hedging Instruments, Gain (Loss) [Table Text Block]	The impacts of derivative instruments used for economic hedging or trading purposes on the Consolidated Statements of Income are presented in the following table: Classification of (Loss)/Gain Recognized in Income on Derivatives Amount of (Loss)/Gain Recognized in Income on Derivatives During the Year Ended December 31 (Dollars in millions) 2018 2017 2016 Derivative instruments not designated as hedging instruments: Interest rate contracts hedging: Residential MSRs Mortgage related income ($110 ) $35 $45 LHFS, IRLCs Mortgage related income 45 (54 ) (6 ) LHFI Other noninterest income 1 — (1 ) Trading activity Trading income 69 42 51 Foreign exchange rate contracts hedging loans and trading activity Trading income 48 (37 ) 101 Credit contracts hedging: LHFI Other noninterest income — (4 ) (3 ) Trading activity Trading income 22 26 19 Equity contracts hedging trading activity Trading income (12 ) — 4 Other contracts: IRLCs and other Mortgage related income, 63 185 210 Commodity derivatives Trading income 1 1 3 Total $127 $194 $423

Fair Value Election and Measu_2

Fair Value Election and Measurement (Tables)	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on a Recurring Basis	The following tables present certain information regarding assets and liabilities measured at fair value on a recurring basis and the changes in fair value for those specific financial instruments for which fair value has been elected. December 31, 2018 Fair Value Measurements (Dollars in millions) Level 1 Level 2 Level 3 Netting Adjustments 1 Assets/Liabilities at Fair Value Assets Trading assets and derivative instruments: U.S. Treasury securities $262 $— $— $— $262 Federal agency securities — 188 — — 188 U.S. states and political subdivisions — 54 — — 54 MBS - agency — 860 — — 860 Corporate and other debt securities — 700 — — 700 CP — 190 — — 190 Equity securities 73 — — — 73 Derivative instruments 186 2,425 20 (1,992 ) 639 Trading loans — 2,540 — — 2,540 Total trading assets and derivative instruments 521 6,957 20 (1,992 ) 5,506 Securities AFS: U.S. Treasury securities 4,211 — — — 4,211 Federal agency securities — 221 — — 221 U.S. states and political subdivisions — 589 — — 589 MBS - agency residential — 22,864 — — 22,864 MBS - agency commercial — 2,627 — — 2,627 MBS - non-agency commercial — 916 — — 916 Corporate and other debt securities — 14 — — 14 Total securities AFS 2 4,211 27,231 — — 31,442 LHFS — 1,178 — — 1,178 LHFI — — 163 — 163 Residential MSRs — — 1,983 — 1,983 Other assets 2 95 — — — 95 Liabilities Trading liabilities and derivative instruments: U.S. Treasury securities 801 — — — 801 MBS - agency — 3 — — 3 Corporate and other debt securities — 385 — — 385 Equity securities 5 — — — 5 Derivative instruments 119 2,590 7 (2,306 ) 410 Total trading liabilities and derivative instruments 925 2,978 7 (2,306 ) 1,604 Brokered time deposits — 403 — — 403 Long-term debt — 289 — — 289 1 Amounts represent offsetting cash collateral received from, and paid to, the same derivative counterparties, and the impact of netting derivative assets and derivative liabilities when a legally enforceable master netting agreement or similar agreement exists. See Note 19 , “Derivative Financial Instruments,” for additional information. 2 Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability . See Note 11 , “Other Assets,” for additional information. December 31, 2017 Fair Value Measurements (Dollars in millions) Level 1 Level 2 Level 3 Netting Adjustments 1 Assets/Liabilities at Fair Value Assets Trading assets and derivative instruments: U.S. Treasury securities $157 $— $— $— $157 Federal agency securities — 395 — — 395 U.S. states and political subdivisions — 61 — — 61 MBS - agency — 700 — — 700 Corporate and other debt securities — 655 — — 655 CP — 118 — — 118 Equity securities 56 — — — 56 Derivative instruments 395 3,493 16 (3,102 ) 802 Trading loans — 2,149 — — 2,149 Total trading assets and derivative instruments 608 7,571 16 (3,102 ) 5,093 Securities AFS: U.S. Treasury securities 4,331 — — — 4,331 Federal agency securities — 259 — — 259 U.S. states and political subdivisions — 617 — — 617 MBS - agency residential — 22,704 — — 22,704 MBS - agency commercial — 2,086 — — 2,086 MBS - non-agency residential — — 59 — 59 MBS - non-agency commercial — 866 — — 866 ABS — — 8 — 8 Corporate and other debt securities — 12 5 — 17 Total securities AFS 2 4,331 26,544 72 — 30,947 LHFS — 1,577 — — 1,577 LHFI — — 196 — 196 Residential MSRs — — 1,710 — 1,710 Other assets 2 56 — — — 56 Liabilities Trading liabilities and derivative instruments: U.S. Treasury securities 577 — — — 577 Corporate and other debt securities — 289 — — 289 Equity securities 9 — — — 9 Derivative instruments 183 4,243 16 (4,034 ) 408 Total trading liabilities and derivative instruments 769 4,532 16 (4,034 ) 1,283 Brokered time deposits — 236 — — 236 Long-term debt — 530 — — 530 1 Amounts represent offsetting cash collateral received from, and paid to, the same derivative counterparties, and the impact of netting derivative assets and derivative liabilities when a legally enforceable master netting agreement or similar agreement exists. See Note 19 , “Derivative Financial Instruments,” for additional information. 2 Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability . See Note 11
Fair Value Option Elected, Difference Between the Aggregate Fair Value and the Aggregate Unpaid Principal Balance	The following tables present the difference between fair value and the aggregate UPB for which the FVO has been elected for certain trading loans, LHFS, LHFI, brokered time deposits, and long-term debt instruments. (Dollars in millions) Fair Value at December 31, 2018 Aggregate UPB at December 31, 2018 Fair Value Over/(Under) Unpaid Principal Assets: Trading loans $2,540 $2,526 $14 LHFS: Accruing 1,178 1,128 50 LHFI: Accruing 158 163 (5 ) Nonaccrual 5 6 (1 ) Liabilities: Brokered time deposits 403 403 — Long-term debt 289 286 3 (Dollars in millions) Fair Value at December 31, 2017 Aggregate UPB at December 31, 2017 Fair Value Over/(Under) Unpaid Principal Assets: Trading loans $2,149 $2,111 $38 LHFS: Accruing 1,576 1,533 43 Past due 90 days or more 1 1 — LHFI: Accruing 192 198 (6 ) Nonaccrual 4 6 (2 ) Liabilities: Brokered time deposits 236 233 3 Long-term debt 530 517 13
Fair Value Gains/(Losses) for Items Measured at Fair Value Option [Table Text Block]	Fair Value Gain/(Loss) for the Year Ended December 31, 2018 for Items Measured at Fair Value Pursuant to Election of the FVO (Dollars in millions) Trading Income Mortgage 1 Other Noninterest Income Total Changes in Fair Values Included in Earnings 2 Assets: Trading loans $14 $— $— $14 LHFS — 7 — 7 LHFI — — 1 1 Residential MSRs — (141 ) — (141 ) Liabilities: Brokered time deposits 13 — — 13 Long-term debt 10 — — 10 1 Income related to LHFS does not include income from IRLC s. For the year ended December 31, 2018 , income related to residential MSRs includes income recognized upon the sale of loans reported at LOCOM . 2 Changes in fair value for the year ended December 31, 2018 exclude accrued interest for the period then ended. Interest income or interest expense on trading loans, LHFS, LHFI, brokered time deposits, and long-term debt that have been elected to be measured at fair value are recognized in Interest income or Interest expense in the Consolidated Statements of Income. Fair Value Gain/(Loss) for the Year Ended December 31, 2017 for Items Measured at Fair Value Pursuant to Election of the FVO (Dollars in millions) Trading Mortgage 1 Other Total 2 Assets: Trading loans $21 $— $— $21 LHFS — 61 — 61 Residential MSRs — (243 ) — (243 ) Liabilities: Long-term debt 21 — — 21 1 Income related to LHFS does not include income from IRLC s. For the year ended December 31, 2017 , income related to residential MSRs includes income recognized upon the sale of loans reported at LOCOM . 2 Changes in fair value for the year ended December 31, 2017 exclude accrued interest for the period then ended. Interest income or interest expense on trading loans, LHFS, and long-term debt that have been elected to be measured at fair value are recognized in Interest income or Interest expense in the Consolidated Statements of Income. Fair Value Gain/(Loss) for the Year Ended December 31, 2016 for Items Measured at Fair Value Pursuant to Election of the FVO (Dollars in millions) Trading Mortgage 1 Other Total 2 Assets: Trading loans $15 $— $— $15 LHFS — 75 — 75 Residential MSRs — (242 ) — (242 ) Liabilities: Brokered time deposits 4 — — 4 Long-term debt 27 — — 27 1 Income related to LHFS does not include income from IRLC s. For the year ended December 31, 2016 , income related to residential MSRs includes income recognized upon the sale of loans reported at LOCOM . 2 Changes in fair value for the year ended December 31, 2016 exclude accrued interest for the period then ended. Interest income or interest expense on trading loans, LHFS, brokered time deposits, and long-term debt that have been elected to be measured at fair value are recognized in Interest income or Interest expense in the Consolidated Statements of Income.
Fair Value Level 3 Significant Unobservable Input Assumptions [Table Text Block]	The valuation technique and range, including weighted average, of the unobservable inputs associated with the Company's level 3 assets and liabilities are as follows: Level 3 Significant Unobservable Input Assumptions (Dollars in millions) Fair value December 31, 2018 Valuation Technique Unobservable Input Range (Weighted Average) 1 Assets Trading assets and derivative instruments: Derivative instruments, net 2 $13 Internal model Pull through rate 41-100% (81%) MSR value 11-165 bps (108 bps) LHFI 158 Monte Carlo/Discounted cash flow Option adjusted spread 0-250 bps (164 bps) Conditional prepayment rate 7-22 CPR (12 CPR) Conditional default rate 0-1 CDR (0.6 CDR) 5 Collateral based pricing Appraised value NM 3 Residential MSRs 1,983 Monte Carlo/Discounted cash flow Conditional prepayment rate 6-30 CPR (13 CPR) Option adjusted spread 0-116% (2%) 1 Unobservable inputs were weighted by the relative fair value of the financial instruments. 2 Amount represents the net of IRLC assets and liabilities and includes the derivative liability associated with the Company’s sale of Visa shares. Refer to the “Trading Liabilities and Derivative Instruments” section in this Note for a discussion of valuation assumptions related to the Visa derivative liability. 3 Not meaningful. Level 3 Significant Unobservable Input Assumptions (Dollars in millions) Fair value December 31, 2017 Valuation Technique Unobservable Input 1 Range (Weighted Average) 2 Assets Trading assets and derivative instruments: Derivative instruments, net 3 $— Internal model Pull through rate 41-100% (81%) MSR value 41-190 bps (113 bps) Securities AFS: MBS - non-agency residential 59 Third party pricing N/A ABS 8 Third party pricing N/A Corporate and other debt securities 5 Cost N/A LHFI 192 Monte Carlo/Discounted cash flow Option adjusted spread 62-784 bps (215 bps) Conditional prepayment rate 2-34 CPR (11 CPR) Conditional default rate 0-5 CDR (0.7 CDR) 4 Collateral based pricing Appraised value NM 4 Residential MSRs 1,710 Monte Carlo/Discounted cash flow Conditional prepayment rate 6-30 CPR (13 CPR) Option adjusted spread 1-125% (4%) 1 For certain assets and liabilities where the Company utilizes third party pricing, the unobservable inputs and their ranges are not reasonably available, and therefore, have been noted as not applicable (“N/A”). 2 Unobservable inputs were weighted by the relative fair value of the financial instruments. 3 Amount represents the net of IRLC assets and liabilities and includes the derivative liability associated with the Company’s sale of Visa shares. Refer to the “Trading Liabilities and Derivative Instruments” section in this Note for a discussion of valuation assumptions related to the Visa derivative liability. 4
Reconciliation of the Beginning and Ending Balances for Fair Valued Assets and Liabilities Measured on a Recurring Basis Using Significant Unobservable Inputs	Fair Value Measurements Using Significant Unobservable Inputs (Dollars in millions) Beginning Included OCI Purchases Sales Settlements Transfers to/from Other Balance Sheet Line Items Transfers Transfers Fair Value Assets Trading assets: Derivative instruments, net $— $65 1 $— $— $— $11 ($63 ) $— $— $13 Securities AFS: MBS - non-agency residential 59 — — — — (2 ) — — (57 ) — ABS 8 — — — — (1 ) — — (7 ) — Corporate and other debt securities 5 — — — — — — — (5 ) — Total securities AFS 72 — — — — (3 ) — — (69 ) — LHFI 196 1 2 — — — (36 ) — 2 — 163 1 Includes issuances, fair value changes, and expirations. Amount related to residential IRLC s is recognized in Mortgage related income, amount related to commercial IRLC s is recognized in Commercial real estate related income, and amount related to Visa derivative liability is recognized in Other noninterest expense. Included $18 million in earnings during the year ended December 31, 2018 , related to changes in unrealized gains on net derivative instruments still held at December 31, 2018 . 2 Amounts are generally included in Mortgage related income; however, the mark on certain fair value loans is included in Other noninterest income. Included less than $1 million in earnings during the year ended December 31, 2018 , related to changes in unrealized losses on LHFI still held at December 31, 2018 . Fair Value Measurements Using Significant Unobservable Inputs (Dollars in millions) Beginning Included OCI Purchases Sales Settlements Transfers to/from Other Balance Sheet Line Items Transfers Transfers Fair Value Assets Trading assets: Derivative instruments, net $6 $185 1 $— $— $— $— ($191 ) $— $— $— Securities AFS: U.S. states and political subdivisions 4 — — — — (4 ) — — — — MBS - non-agency residential 74 (1 ) 2 1 3 — — (15 ) — — — 59 ABS 10 — 1 3 — — (3 ) — — — 8 Corporate and other debt securities 5 — — — — — — — — 5 Total securities AFS 93 (1 ) 2 2 3 — — (22 ) — — — 72 Residential LHFS 12 — — — (25 ) (1 ) (4 ) 26 (8 ) — LHFI 222 — 4 — — — (34 ) 3 5 — 196 1 Includes issuances, fair value changes, and expirations. Amount related to residential IRLC s is recognized in Mortgage related income, amount related to commercial IRLC s is recognized in Commercial real estate related income, and amount related to Visa derivative liability is recognized in Other noninterest expense. Included $12 million in earnings during the year ended December 31, 2017 , related to changes in unrealized gains on net derivative instruments still held at December 31, 2017 . 2 Included $1 million in earnings during year ended December 31, 2017 , related to changes in unrealized losses on securities AFS still held at December 31, 2017 . 3 Amounts recognized in OCI are included in change in net unrealized gains on securities AFS, net of tax. 4 Amounts are generally included in Mortgage related income; however, the mark on certain fair value loans is included in Other noninterest income. Included $1 million in earnings during the year ended December 31, 2017 , related to changes in unrealized losses on LHFI still held at December 31, 2017
Change in Carrying Value of Assets Measured at Fair Value on a Non-Recurring Basis	Fair Value Measurements (Losses)/Gains for the December 31, 2018 (Dollars in millions) December 31, 2018 Level 1 Level 2 Level 3 LHFS $47 $— $47 $— ($1 ) LHFI 63 — — 63 — OREO 19 — — 19 (4 ) Other assets 67 — 47 20 24 Fair Value Measurements Losses for the December 31, 2017 (Dollars in millions) December 31, 2017 Level 1 Level 2 Level 3 LHFS $13 $— $13 $— $— LHFI 49 — — 49 — OREO 24 — 1 23 (4 ) Other assets 53 — 4 49 (43 )
Carrying Amounts and Fair Values of the Company's Financial Instruments	The carrying amounts and fair values of the Company’s financial instruments are as follows: December 31, 2018 Fair Value Measurements (Dollars in millions) Measurement Category Carrying Amount Fair Value Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents Amortized cost $7,495 $7,495 $7,495 $— $— Trading assets and derivative instruments Fair value 5,506 5,506 521 4,965 20 Securities AFS Fair value 31,442 31,442 4,211 27,231 — LHFS Amortized cost 290 291 — 261 30 Fair value 1,178 1,178 — 1,178 — LHFI, net Amortized cost 150,061 148,167 — — 148,167 Fair value 163 163 — — 163 Other 1 Amortized cost 630 630 — — 630 Fair value 95 95 95 — — Financial liabilities: Consumer and other time deposits Amortized cost 15,355 15,106 — 15,106 — Brokered time deposits Amortized cost 642 615 — 615 — Fair value 403 403 — 403 — Short-term borrowings Amortized cost 8,772 8,772 — 8,772 — Long-term debt Amortized cost 14,783 14,729 — 13,024 1,705 Fair value 289 289 — 289 — Trading liabilities and derivative instruments Fair value 1,604 1,604 925 672 7 1 Other financial assets recorded at amortized cost consist of FHLB of Atlanta stock and Federal Reserve Bank of Atlanta stock. Other financial assets recorded at fair value consist of mutual fund investments and other equity securities with readily determinable fair values. December 31, 2017 Fair Value Measurements (Dollars in millions) Measurement Category Carrying Amount Fair Value Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents Amortized cost $6,912 $6,912 $6,912 $— $— Trading assets and derivative instruments Fair value 5,093 5,093 608 4,469 16 Securities AFS Fair value 30,947 30,947 4,331 26,544 72 LHFS Amortized cost 713 716 — 662 54 Fair value 1,577 1,577 — 1,577 — LHFI, net Amortized cost 141,250 141,379 — — 141,379 Fair value 196 196 — — 196 Other 1 Amortized cost 418 418 — — 418 Fair value 56 56 56 — — Financial liabilities: Consumer and other time deposits Amortized cost 12,076 11,906 — 11,906 — Brokered time deposits Amortized cost 749 725 — 725 — Fair value 236 236 — 236 — Short-term borrowings Amortized cost 4,781 4,781 — 4,781 — Long-term debt Amortized cost 9,255 9,362 — 8,304 1,058 Fair value 530 530 — 530 — Trading liabilities and derivative instruments Fair value 1,283 1,283 769 498 16 1 Other financial assets recorded at amortized cost consist of FHLB

Business Segment Reporting Busi

Business Segment Reporting Business Segment Reporting (Tables)	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Business Segment Reporting [Table Text Block]	Year Ended December 31, 2018 (Dollars in millions) Consumer Wholesale Corporate Other Reconciling Consolidated Balance Sheets: Average LHFI $75,427 $70,200 $89 ($2 ) $145,714 Average consumer and commercial deposits 111,235 48,675 216 (358 ) 159,768 Average total assets 85,509 84,413 35,630 1,725 207,277 Average total liabilities 112,173 55,098 16,100 (304 ) 183,067 Average total equity — — — 24,210 24,210 Statements of Income: Net interest income $4,235 $2,184 ($190 ) ($242 ) $5,987 FTE adjustment — 86 2 — 88 Net interest income-FTE 1 4,235 2,270 (188 ) (242 ) 6,075 Provision for credit losses 2 148 60 — — 208 Net interest income after provision for credit losses-FTE 4,087 2,210 (188 ) (242 ) 5,867 Total noninterest income 1,804 1,534 57 (169 ) 3,226 Total noninterest expense 4,017 1,720 (42 ) (22 ) 5,673 Income before provision for income taxes-FTE 1,874 2,024 (89 ) (389 ) 3,420 Provision for income taxes-FTE 3 424 479 (61 ) (206 ) 636 Net income including income attributable to noncontrolling interest 1,450 1,545 (28 ) (183 ) 2,784 Less: Net income attributable to noncontrolling interest — — 9 — 9 Net income $1,450 $1,545 ($37 ) ($183 ) $2,775 1 Presented on a matched maturity funds transfer price basis for the segments. 2 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. 3 Includes regular provision for income taxes as well as FTE income and tax credit adjustment reversals. Year Ended December 31, 2017 1, 2 (Dollars in millions) Consumer Wholesale Corporate Other Reconciling Consolidated Balance Sheets: Average LHFI $73,578 $69,394 $1,247 ($3 ) $144,216 Average consumer and commercial deposits 109,298 50,155 160 (64 ) 159,549 Average total assets 83,278 83,091 35,931 2,631 204,931 Average total liabilities 110,271 55,762 14,626 (29 ) 180,630 Average total equity — — — 24,301 24,301 Statements of Income: Net interest income $3,906 $2,029 $14 ($316 ) $5,633 FTE adjustment — 142 3 — 145 Net interest income-FTE 3 3,906 2,171 17 (316 ) 5,778 Provision for credit losses 4 366 39 4 — 409 Net interest income after provision for credit losses-FTE 3,540 2,132 13 (316 ) 5,369 Total noninterest income 1,905 1,573 73 (197 ) 3,354 Total noninterest expense 3,982 1,727 74 (19 ) 5,764 Income before provision for income taxes-FTE 1,463 1,978 12 (494 ) 2,959 Provision for income taxes-FTE 5 529 736 (292 ) (296 ) 677 Net income including income attributable to noncontrolling interest 934 1,242 304 (198 ) 2,282 Less: Net income attributable to noncontrolling interest — — 9 — 9 Net income $934 $1,242 $295 ($198 ) $2,273 1 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. 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 Presented on a matched maturity funds transfer price basis for the segments. 4 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. 5 Includes regular provision for income taxes as well as FTE income and tax credit adjustment reversals. Year Ended December 31, 2016 1, 2 (Dollars in millions) Consumer Wholesale Corporate Other Reconciling Consolidated Balance Sheets: Average LHFI $70,455 $69,287 $1,379 ($3 ) $141,118 Average consumer and commercial deposits 105,365 48,782 115 (73 ) 154,189 Average total assets 79,971 83,168 33,425 2,440 199,004 Average total liabilities 106,374 54,457 14,179 (74 ) 174,936 Average total equity — — — 24,068 24,068 Statements of Income: Net interest income $3,636 $1,812 $160 ($387 ) $5,221 FTE adjustment — 136 2 — 138 Net interest income-FTE 3 3,636 1,948 162 (387 ) 5,359 Provision for credit losses 4 159 282 3 — 444 Net interest income after provision for credit losses-FTE 3,477 1,666 159 (387 ) 4,915 Total noninterest income 2,067 1,325 137 (146 ) 3,383 Total noninterest expense 3,938 1,507 38 (15 ) 5,468 Income before provision for income taxes-FTE 1,606 1,484 258 (518 ) 2,830 Provision for income taxes-FTE 5 592 555 70 (274 ) 943 Net income including income attributable to noncontrolling interest 1,014 929 188 (244 ) 1,887 Less: Net income attributable to noncontrolling interest — — 9 — 9 Net income $1,014 $929 $179 ($244 ) $1,878 1 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. 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 Presented on a matched maturity funds transfer price basis for the segments. 4 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. 5

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2018
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	Changes in the components of AOCI, net of tax, are presented in the following table: (Dollars in millions) Securities AFS Derivative Instruments Brokered Time Deposits Long-Term Debt Employee Benefit Plans Total Year Ended December 31, 2018 Balance, beginning of period ($1 ) ($244 ) ($1 ) ($4 ) ($570 ) ($820 ) Cumulative effect adjustment related to ASU adoption 1 30 (56 ) — (1 ) (127 ) (154 ) Net unrealized (losses)/gains arising during the period (385 ) (123 ) 2 4 (56 ) (558 ) Amounts reclassified to net income (1 ) 55 — — 58 112 Other comprehensive (loss)/income, net of tax (386 ) (68 ) 2 4 2 (446 ) Balance, end of period ($357 ) ($368 ) $1 ($1 ) ($695 ) ($1,420 ) Year Ended December 31, 2017 Balance, beginning of period ($62 ) ($157 ) ($1 ) ($7 ) ($594 ) ($821 ) Net unrealized (losses)/gains arising during the period (7 ) (31 ) — 3 11 (24 ) Amounts reclassified to net income 68 (56 ) — — 13 25 Other comprehensive income/(loss), net of tax 61 (87 ) — 3 24 1 Balance, end of period ($1 ) ($244 ) ($1 ) ($4 ) ($570 ) ($820 ) Year Ended December 31, 2016 Balance, beginning of period $135 $87 $— $— ($682 ) ($460 ) Cumulative credit risk adjustment 2 — — — (5 ) — (5 ) Net unrealized (losses)/gains arising during the period (194 ) (91 ) (1 ) (2 ) 76 (212 ) Amounts reclassified to net income (3 ) (153 ) — — 12 (144 ) Other comprehensive (loss)/income, net of tax (197 ) (244 ) (1 ) (2 ) 88 (356 ) Balance, end of period ($62 ) ($157 ) ($1 ) ($7 ) ($594 ) ($821 ) 1 Related to the Company's early adoption of ASU 2018-02 beginning January 1, 2018. See Note 1 , "Significant Accounting Policies," for additional information. 2 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
Schedule of Reclassifications from AOCI [Table Text Block]	Reclassifications from AOCI to Net income, and the related tax effects, are presented in the following table: (Dollars in millions) Year Ended December 31 Impacted Line Item in the Consolidated Statements of Income Details About AOCI Components 2018 2017 2016 Securities AFS: Net realized (gains)/losses on securities AFS ($1 ) $108 ($4 ) Net securities gains/(losses) Tax effect — (40 ) 1 Provision for income taxes (1 ) 68 (3 ) Derivative Instruments: Net realized losses/(gains) on cash flow hedges 72 (89 ) (244 ) Interest and fees on loans held for investment Tax effect (17 ) 33 91 Provision for income taxes 55 (56 ) (153 ) Employee Benefit Plans: Amortization of prior service credit (6 ) (6 ) (6 ) Employee benefits Amortization of actuarial loss 22 25 25 Employee benefits Deferred losses related to NCF Retirement Plan settlement 1 60 — — Employee benefits 76 19 19 Tax effect (18 ) (6 ) (7 ) Provision for income taxes 58 13 12 Total reclassifications from AOCI to net income $112 $25 ($144 ) 1 Related to the Company's NCF Retirement Plan settlement in the fourth quarter of 2018. See Note 17

SunTrust Banks, Inc. (Parent _2

SunTrust Banks, Inc. (Parent Company Only) Financial Information Income Statement (Tables)	12 Months Ended
	Dec. 31, 2018
Parent Company [Member]
Condensed Income Statement [Table Text Block]	Statements of Income - Parent Company Only Year Ended December 31 (Dollars in millions) 2018 2017 2016 Income Dividends 1 $2,380 $1,414 $1,300 Interest from loans to subsidiaries 30 25 15 Interest from deposits at banks 25 22 12 Other income 34 5 2 Total income 2,469 1,466 1,329 Expense Interest on short-term borrowings 6 4 2 Interest on long-term debt 161 137 140 Employee compensation and benefits 2 40 103 57 Service fees to subsidiaries 9 12 12 Other expense 19 33 24 Total expense 235 289 235 Income before income tax benefit and equity in undistributed income of subsidiaries 2,234 1,177 1,094 Income tax benefit 20 72 59 Income before equity in undistributed income of subsidiaries 2,254 1,249 1,153 Equity in undistributed income of subsidiaries 521 1,024 725 Net income $2,775 $2,273 $1,878 Total other comprehensive (loss)/income, net of tax (446 ) 1 (356 ) Total comprehensive income $2,329 $2,274 $1,522 1 Substantially all dividend income is from subsidiaries (primarily the Bank). 2

SunTrust Banks, Inc. (Parent _3

SunTrust Banks, Inc. (Parent Company Only) Financial Information Balance Sheets (Tables)	12 Months Ended
	Dec. 31, 2018
Parent Company [Member]
Condensed Balance Sheet [Table Text Block]	Balance Sheets - Parent Company Only December 31 (Dollars in millions) 2018 2017 Assets Cash held at SunTrust Bank $599 $701 Interest-bearing deposits held at SunTrust Bank 913 2,144 Interest-bearing deposits held at other banks 24 24 Cash and cash equivalents 1,536 2,869 Trading assets and derivative instruments 12 — Securities available for sale 98 123 Loans to subsidiaries 1,261 1,218 Investment in capital stock of subsidiaries stated on the basis of the Company’s equity in subsidiaries’ capital accounts: Banking subsidiaries 24,630 24,590 Nonbanking subsidiaries 1,457 1,423 Goodwill 211 211 Other assets 686 547 Total assets $29,891 $30,981 Liabilities Short-term borrowings: Subsidiaries $5 $205 Non-affiliated companies 354 350 Long-term debt: Non-affiliated companies 4,536 4,466 Other liabilities 819 909 Total liabilities 5,714 5,930 Shareholders’ Equity Preferred stock 2,025 2,475 Common stock 553 550 Additional paid-in capital 9,022 9,000 Retained earnings 19,522 17,540 Treasury stock, at cost, and other (5,525 ) (3,694 ) Accumulated other comprehensive loss, net of tax (1,420 ) (820 ) Total shareholders’ equity 24,177 25,051 Total liabilities and shareholders’ equity $29,891 $30,981

SunTrust Banks, Inc. (Parent _4

SunTrust Banks, Inc. (Parent Company Only) Financial Information Cash Flow (Tables)	12 Months Ended
	Dec. 31, 2018
Parent Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Condensed Cash Flow Statement [Table Text Block]	Statements of Cash Flows - Parent Company Only Year Ended December 31 (Dollars in millions) 2018 2017 2016 Cash Flows from Operating Activities: Net income $2,775 $2,273 $1,878 Adjustments to reconcile net income to net cash (used in)/provided by operating activities: Equity in undistributed income of subsidiaries (521 ) (1,024 ) (725 ) Depreciation, amortization, and accretion 3 5 3 Deferred income tax expense 8 5 11 Stock-based compensation — — 3 Net securities (gains)/losses — (1 ) — Net increase in other assets (158 ) (15 ) (129 ) Net increase in other liabilities 26 122 62 Net cash provided by operating activities 2,133 1,365 1,103 Cash Flows from Investing Activities: Proceeds from maturities, calls, and paydowns of securities available for sale 23 38 49 Proceeds from sales of securities available for sale — 1 4 Purchases of securities available for sale — (17 ) (4 ) Net (increase)/decrease in loans to subsidiaries (43 ) 1,298 (889 ) Other, net (1 ) — (3 ) Net cash (used in)/provided by investing activities (21 ) 1,320 (843 ) Cash Flows from Financing Activities: Net (decrease)/increase in short-term borrowings (196 ) (211 ) 5 Proceeds from issuance of long-term debt 929 9 2,005 Repayments of long-term debt (873 ) (482 ) (1,784 ) Proceeds from issuance of preferred stock — 1,239 — Repurchase of preferred stock (450 ) — — Repurchase of common stock (1,910 ) (1,314 ) (806 ) Repurchase of common stock warrants — — (24 ) Common and preferred stock dividends paid (936 ) (723 ) (564 ) Taxes paid related to net share settlement of equity awards (45 ) (39 ) (48 ) Proceeds from exercise of stock options 36 21 25 Net cash used in financing activities (3,445 ) (1,500 ) (1,191 ) Net (decrease)/increase in cash and cash equivalents (1,333 ) 1,185 (931 ) Cash and cash equivalents at beginning of period 2,869 1,684 2,615 Cash and cash equivalents at end of period $1,536 $2,869 $1,684 Supplemental Disclosures: Income taxes received from/(paid to) subsidiaries $101 ($489 ) ($886 ) Income taxes (paid)/received by Parent Company (105 ) 414 812 Net income taxes paid by Parent Company ($4 ) ($75 ) ($74 ) Interest paid $164 $140 $135

Significant Accounting Polici_3

Significant Accounting Policies Significant Accounting Policies Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Significant Accounting Policies [Line Items]
Sale Leaseback Transaction, Deferred Gain, Gross	$ 42	$ 49
Operating Leases, Future Minimum Payments Due, Future Minimum Sublease Rentals	1,300
Operating Lease, Right-of-Use Asset	1,200
Adoption of ASU 2016-02 [Member]
Significant Accounting Policies [Line Items]
Sale Leaseback Transaction, Deferred Gain, Gross	31
Cash Proceeds from BOLI/COLI [Member]
Significant Accounting Policies [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	14	3	$ 17
Cash Premiums Paid on BOLI/COLI [Member] [Member]
Significant Accounting Policies [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	202	$ 127	202
Contingent Consideration Paid Up to Amount of Acquisition Date Fair Value [Member] [Member]
Significant Accounting Policies [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification			13
Contingent Consideration Paid in Excess of Acquisition Date Fair Value [Member] [Member]
Significant Accounting Policies [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification			$ 10
Stranded Tax Effects in AOCI, Gross Portion [Member]
Significant Accounting Policies [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	182
Stranded Tax Effects in AOCI, Offset Portion [Member]
Significant Accounting Policies [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	28
Stranded Tax Effects in AOCI [Member]
Significant Accounting Policies [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	154
ASU 2014-09 Revenue from Contracts with Customers - Impact on Noninterest Income [Domain]
Significant Accounting Policies [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	(26)
ASU 2014-09 Revenue from Contracts with Customers - Impact on Noninterest Expense [Domain]
Significant Accounting Policies [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ (26)

Disaggregation of Revenue (Deta

Disaggregation of Revenue (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1]		$ 3,354	$ 3,383
Revenue from Contract with Customer, Including Assessed Tax	[1]	$ 3,226
Contract with Customer, Performance Obligation Satisfied in Previous Period		50
In Scope of ASC 606 [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax		1,992
In Scope of ASC 606 [Member] | Wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2]		636	572
Revenue from Contract with Customer, Including Assessed Tax	[1],[2]	605
In Scope of ASC 606 [Member] | Consumer [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2]		1,419	1,444
Revenue from Contract with Customer, Including Assessed Tax	[1],[2]	1,387
Out of Scope of ASC 606 [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2],[3]		1,299	1,367
Revenue from Contract with Customer, Including Assessed Tax	[1],[2],[3]	1,234
Out of Scope of ASC 606 [Member] | Wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax			937	753
Revenue from Contract with Customer, Including Assessed Tax		929
Out of Scope of ASC 606 [Member] | Consumer [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax			486	623
Revenue from Contract with Customer, Including Assessed Tax		417
Out of Scope of ASC 606 [Member] | Corporate Other [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax			(124)	(9)
Revenue from Contract with Customer, Including Assessed Tax		(112)
Deposit Account [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1]		603	630
Revenue from Contract with Customer, Including Assessed Tax	[1]	579
Deposit Account [Member] | In Scope of ASC 606 [Member] | Wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2]		143	148
Revenue from Contract with Customer, Including Assessed Tax	[1],[2]	135
Deposit Account [Member] | In Scope of ASC 606 [Member] | Consumer [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2]		460	482
Revenue from Contract with Customer, Including Assessed Tax	[1],[2]	444
Deposit Account [Member] | Out of Scope of ASC 606 [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2],[3]		0	0
Revenue from Contract with Customer, Including Assessed Tax	[1],[2],[3]	0
Financial Service, Other [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[4],[5]		361	359
Revenue from Contract with Customer, Including Assessed Tax	[1],[4],[5]	356
Financial Service, Other [Member] | In Scope of ASC 606 [Member] | Wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2],[4],[5]		12	11
Revenue from Contract with Customer, Including Assessed Tax	[1],[2],[4],[5]	12
Financial Service, Other [Member] | In Scope of ASC 606 [Member] | Consumer [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2],[4],[5]		124	130
Revenue from Contract with Customer, Including Assessed Tax	[1],[2],[4],[5]	114
Financial Service, Other [Member] | Out of Scope of ASC 606 [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2],[3],[4],[5]		225	218
Revenue from Contract with Customer, Including Assessed Tax	[1],[2],[3],[4],[5]	230
Credit and Debit Card [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1]		344	327
Revenue from Contract with Customer, Including Assessed Tax	[1]	324
Credit and Debit Card [Member] | In Scope of ASC 606 [Member] | Wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2]		108	93
Revenue from Contract with Customer, Including Assessed Tax	[1],[2]	104
Credit and Debit Card [Member] | In Scope of ASC 606 [Member] | Consumer [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2]		232	228
Revenue from Contract with Customer, Including Assessed Tax	[1],[2]	216
Credit and Debit Card [Member] | Out of Scope of ASC 606 [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2],[3]		4	6
Revenue from Contract with Customer, Including Assessed Tax	[1],[2],[3]	4
Investment Banking [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[4]		623	515
Revenue from Contract with Customer, Including Assessed Tax	[1],[4]	599
Investment Banking [Member] | In Scope of ASC 606 [Member] | Wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2],[4]		371	317
Revenue from Contract with Customer, Including Assessed Tax	[1],[2],[4]	352
Investment Banking [Member] | In Scope of ASC 606 [Member] | Consumer [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2],[4]		0	0
Revenue from Contract with Customer, Including Assessed Tax	[1],[2],[4]	0
Investment Banking [Member] | Out of Scope of ASC 606 [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2],[3],[4]		252	198
Revenue from Contract with Customer, Including Assessed Tax	[1],[2],[3],[4]	247
Trading [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1]		189	211
Revenue from Contract with Customer, Including Assessed Tax	[1]	161
Trading [Member] | In Scope of ASC 606 [Member] | Wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2]		0	0
Revenue from Contract with Customer, Including Assessed Tax	[1],[2]	0
Trading [Member] | In Scope of ASC 606 [Member] | Consumer [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2]		0	0
Revenue from Contract with Customer, Including Assessed Tax	[1],[2]	0
Trading [Member] | Out of Scope of ASC 606 [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2],[3]		189	211
Revenue from Contract with Customer, Including Assessed Tax	[1],[2],[3]	161
Mortgage Banking [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1]		422	555
Revenue from Contract with Customer, Including Assessed Tax	[1]	342
Mortgage Banking [Member] | In Scope of ASC 606 [Member] | Wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2]		0	0
Revenue from Contract with Customer, Including Assessed Tax	[1],[2]	0
Mortgage Banking [Member] | In Scope of ASC 606 [Member] | Consumer [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2]		0	0
Revenue from Contract with Customer, Including Assessed Tax	[1],[2]	0
Mortgage Banking [Member] | Out of Scope of ASC 606 [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2],[3]		422	555
Revenue from Contract with Customer, Including Assessed Tax	[1],[2],[3]	342
Fiduciary and Trust [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1]		309	304
Revenue from Contract with Customer, Including Assessed Tax	[1]	304
Fiduciary and Trust [Member] | In Scope of ASC 606 [Member] | Wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2]		0	0
Revenue from Contract with Customer, Including Assessed Tax	[1],[2]	0
Fiduciary and Trust [Member] | In Scope of ASC 606 [Member] | Consumer [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2]		302	300
Revenue from Contract with Customer, Including Assessed Tax	[1],[2]	301
Fiduciary and Trust [Member] | Out of Scope of ASC 606 [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2],[3]		7	4
Revenue from Contract with Customer, Including Assessed Tax	[1],[2],[3]	3
Investment Advisory, Management and Administrative Service [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[6]		278	281
Revenue from Contract with Customer, Including Assessed Tax	[1],[6]	292
Investment Advisory, Management and Administrative Service [Member] | In Scope of ASC 606 [Member] | Wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2],[6]		2	3
Revenue from Contract with Customer, Including Assessed Tax	[1],[2],[6]	2
Investment Advisory, Management and Administrative Service [Member] | In Scope of ASC 606 [Member] | Consumer [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2],[6]		275	277
Revenue from Contract with Customer, Including Assessed Tax	[1],[2],[6]	289
Investment Advisory, Management and Administrative Service [Member] | Out of Scope of ASC 606 [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2],[3],[6]		1	1
Revenue from Contract with Customer, Including Assessed Tax	[1],[2],[3],[6]	1
Commercial Real Estate [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1]		123	69
Revenue from Contract with Customer, Including Assessed Tax	[1]	134
Commercial Real Estate [Member] | In Scope of ASC 606 [Member] | Wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2]		0	0
Revenue from Contract with Customer, Including Assessed Tax	[1],[2]	0
Commercial Real Estate [Member] | In Scope of ASC 606 [Member] | Consumer [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2]		0	0
Revenue from Contract with Customer, Including Assessed Tax	[1],[2]	0
Commercial Real Estate [Member] | Out of Scope of ASC 606 [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2],[3]		123	69
Revenue from Contract with Customer, Including Assessed Tax	[1],[2],[3]	134
Net Securities Gains/(Losses) [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1]		(108)	4
Revenue from Contract with Customer, Including Assessed Tax	[1]	1
Net Securities Gains/(Losses) [Member] | In Scope of ASC 606 [Member] | Wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2]		0	0
Revenue from Contract with Customer, Including Assessed Tax	[1],[2]	0
Net Securities Gains/(Losses) [Member] | In Scope of ASC 606 [Member] | Consumer [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2]		0	0
Revenue from Contract with Customer, Including Assessed Tax	[1],[2]	0
Net Securities Gains/(Losses) [Member] | Out of Scope of ASC 606 [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2],[3]		(108)	4
Revenue from Contract with Customer, Including Assessed Tax	[1],[2],[3]	1
Other Income [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1]		103	128
Revenue from Contract with Customer, Including Assessed Tax	[1]	134
Other Income [Member] | In Scope of ASC 606 [Member] | Wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2]		0	0
Revenue from Contract with Customer, Including Assessed Tax	[1],[2]	0
Other Income [Member] | In Scope of ASC 606 [Member] | Consumer [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2]		26	27
Revenue from Contract with Customer, Including Assessed Tax	[1],[2]	23
Other Income [Member] | Out of Scope of ASC 606 [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[1],[2],[3]		77	$ 101
Revenue from Contract with Customer, Including Assessed Tax	[1],[2],[3]	$ 111
Sale of Subsidiary Gain (Loss) [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[7]		107
Sale of Subsidiary Gain (Loss) [Member] | In Scope of ASC 606 [Member] | Wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[7],[8]		0
Sale of Subsidiary Gain (Loss) [Member] | In Scope of ASC 606 [Member] | Consumer [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[7],[8]		0
Sale of Subsidiary Gain (Loss) [Member] | Out of Scope of ASC 606 [Member]
Disaggregation of Revenue [Line Items]
Revenue Recognition, Including Assessed Tax	[7],[8],[9]		$ 107
[1]	Amounts are presented in accordance with ASC Topic 606, Revenue from Contracts with Customers
[2]	Consumer total noninterest income and Wholesale total noninterest income exclude $417 million and $929 million of out of scope noninterest income, respectively, which are included in the business segment results presented on a management accounting basis in Note 22 , "Business Segment Reporting." Out of scope total noninterest income includes these amounts and also includes ($112) million of Corporate Other noninterest income that is not subject to ASC
[3]	The Company presents out of scope noninterest income for the purpose of reconciling noninterest income amounts within the scope of ASC
[4]	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.
[5]	The Company recognized an immaterial amount of insurance trailing commissions, the majority of which related to performance obligations satisfied in prior periods.
[6]	The Company recognized $50 million of mutual fund 12b-1 fees and annuity trailing commissions, the majority of which related to performance obligations satisfied in periods prior to December 31, 2018
[7]	Amounts for periods prior to January 1, 2018 are presented in accordance with ASC Topic 605, Revenue Recognition , and have not been restated to conform with ASC Topic 606, Revenue from Contracts with Customers
[8]	Consumer total noninterest income and Wholesale total noninterest income exclude $486 million and $937 million of out of scope noninterest income, respectively, which are included in the business segment results presented on a management accounting basis in Note 22 , "Business Segment Reporting." Out of scope total noninterest income includes these amounts and also includes ($124) million of Corporate Other noninterest income that is not subject to ASC
[9]	The Company presents out of scope noninterest income for the purpose of reconciling noninterest income amounts within the scope of ASC

Acquisitions_Dispositions - Sch

Acquisitions/Dispositions - Schedule of Business Acquisitions, by Acquisition (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Proceeds from Divestiture of Businesses		$ 0	$ 261	$ 0
Goodwill, Written off Related to Sale of Business Unit			(7)
Intangible Assets, Written off Related to Sale of Business Unit	[1]		1
Gain (Loss) on Disposition of Business		$ 0	107	0
Premium Assignment Corporation [Member]
Business Acquisition [Line Items]
Proceeds from Divestiture of Businesses			261
Goodwill, Written off Related to Sale of Business Unit			(7)
Intangible Assets, Written off Related to Sale of Business Unit			0
Gain (Loss) on Disposition of Business			$ 107
Pillar Financial [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred				(197)
Goodwill, Acquired During Period				1
Indefinite-lived Intangible Assets Acquired	[2]			13
Business Combination, Bargain Purchase, Gain Recognized, Amount				$ 0
[1]	Represents measurement period adjustment on other intangible assets acquired previously in the Pillar
[2]	Does not include $62 million

Acquisitions_Dispositions - S_2

Acquisitions/Dispositions - Schedule of Subsidiary Income Statement (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Noninterest Expense	$ 5,673	$ 5,764	[1],[2]	$ 5,468	[3],[4]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	$ 3,420	2,959	[1],[2]	2,830	[3],[4]
Premium Assignment Corporation [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues		56		60
Noninterest Expense		31		27
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest		$ 25		$ 33
[1]	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.
[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]	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.

Acquisitions_Dispositions - Add

Acquisitions/Dispositions - Additional Information (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Business Acquisition [Line Items]
Total assets		$ 215,543	$ 205,962
Total liabilities		191,263	180,808
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest		3,420	2,959	[1],[2]	$ 2,830	[3],[4]
Noninterest Expense		5,673	5,764	[1],[2]	5,468	[3],[4]
Proceeds from Divestiture of Businesses		0	261		0
Gain (Loss) on Disposition of Business		0	107		0
Premium Assignment Corporation [Member]
Business Acquisition [Line Items]
Total assets			1,300
Total liabilities			1,200
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest			25		33
Revenues			56		60
Noninterest Expense			31		27
Proceeds from Divestiture of Businesses			261
Gain (Loss) on Disposition of Business			107
Pillar Financial [Member]
Business Combinations [Abstract]
Indefinite-lived Intangible Assets Acquired	[5]				13
Business Acquisition [Line Items]
Business Combination, Consideration Transferred					(197)
Wholesale [Member]
Business Acquisition [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest		2,024	1,978	[1],[2]	1,484	[3],[4]
Noninterest Expense		$ 1,720	$ 1,727	[1],[2]	$ 1,507	[3],[4]
[1]	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.
[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]	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]	Does not include $62 million

Federal Funds Sold and Securi_3

Federal Funds Sold and Securities Financing Activities - Additional Information (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Securities Purchased under Agreements to Resell [Abstract]
Federal Funds Sold	$ 42	$ 65
Fair Value of Securities Received as Collateral that Can be Resold or Repledged	1,600	1,500
Fair Value of Securities Received as Collateral that Have Been Resold or Repledged	$ 108	$ 177

Schedule of Resale Agreements (

Schedule of Resale Agreements (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Securities Purchased under Agreements to Resell [Abstract]
Federal Funds Sold	$ 42	$ 65
Securities Borrowed	394	298
Securities Purchased under Agreements to Resell	1,243	1,175
Federal Funds Sold and Securities Purchased under Agreements to Resell	$ 1,679	$ 1,538

Federal Funds Sold and Securi_4

Federal Funds Sold and Securities Financing Activities Securities Sold Under Agreements to Repurchase (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
securities sold under agreement to repurchase maturity [Line Items]
Securities Sold under Agreements to Repurchase	$ 1,774	$ 1,503
US Treasury Securities [Member]
securities sold under agreement to repurchase maturity [Line Items]
Securities Sold under Agreements to Repurchase	204	95
US Government Agencies Debt Securities [Member]
securities sold under agreement to repurchase maturity [Line Items]
Securities Sold under Agreements to Repurchase	122	116
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
securities sold under agreement to repurchase maturity [Line Items]
Securities Sold under Agreements to Repurchase	916	829
Commercial Paper [Member]
securities sold under agreement to repurchase maturity [Line Items]
Securities Sold under Agreements to Repurchase	78	19
Corporate Debt Securities [Member]
securities sold under agreement to repurchase maturity [Line Items]
Securities Sold under Agreements to Repurchase	454	444
Maturity Overnight [Member]
securities sold under agreement to repurchase maturity [Line Items]
Securities Sold under Agreements to Repurchase	1,484	1,225
Maturity Overnight [Member] | US Treasury Securities [Member]
securities sold under agreement to repurchase maturity [Line Items]
Securities Sold under Agreements to Repurchase	197	95
Maturity Overnight [Member] | US Government Agencies Debt Securities [Member]
securities sold under agreement to repurchase maturity [Line Items]
Securities Sold under Agreements to Repurchase	112	101
Maturity Overnight [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
securities sold under agreement to repurchase maturity [Line Items]
Securities Sold under Agreements to Repurchase	881	694
Maturity Overnight [Member] | Commercial Paper [Member]
securities sold under agreement to repurchase maturity [Line Items]
Securities Sold under Agreements to Repurchase	78	19
Maturity Overnight [Member] | Corporate Debt Securities [Member]
securities sold under agreement to repurchase maturity [Line Items]
Securities Sold under Agreements to Repurchase	216	316
Maturity up to 30 days [Member]
securities sold under agreement to repurchase maturity [Line Items]
Securities Sold under Agreements to Repurchase	210	238
Maturity up to 30 days [Member] | US Treasury Securities [Member]
securities sold under agreement to repurchase maturity [Line Items]
Securities Sold under Agreements to Repurchase	7	0
Maturity up to 30 days [Member] | US Government Agencies Debt Securities [Member]
securities sold under agreement to repurchase maturity [Line Items]
Securities Sold under Agreements to Repurchase	10	15
Maturity up to 30 days [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
securities sold under agreement to repurchase maturity [Line Items]
Securities Sold under Agreements to Repurchase	35	135
Maturity up to 30 days [Member] | Commercial Paper [Member]
securities sold under agreement to repurchase maturity [Line Items]
Securities Sold under Agreements to Repurchase	0	0
Maturity up to 30 days [Member] | Corporate Debt Securities [Member]
securities sold under agreement to repurchase maturity [Line Items]
Securities Sold under Agreements to Repurchase	158	88
Maturity 30 to 90 Days [Member]
securities sold under agreement to repurchase maturity [Line Items]
Securities Sold under Agreements to Repurchase	80	40
Maturity 30 to 90 Days [Member] | US Treasury Securities [Member]
securities sold under agreement to repurchase maturity [Line Items]
Securities Sold under Agreements to Repurchase	0	0
Maturity 30 to 90 Days [Member] | US Government Agencies Debt Securities [Member]
securities sold under agreement to repurchase maturity [Line Items]
Securities Sold under Agreements to Repurchase	0	0
Maturity 30 to 90 Days [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
securities sold under agreement to repurchase maturity [Line Items]
Securities Sold under Agreements to Repurchase	0	0
Maturity 30 to 90 Days [Member] | Commercial Paper [Member]
securities sold under agreement to repurchase maturity [Line Items]
Securities Sold under Agreements to Repurchase	0	0
Maturity 30 to 90 Days [Member] | Corporate Debt Securities [Member]
securities sold under agreement to repurchase maturity [Line Items]
Securities Sold under Agreements to Repurchase	$ 80	$ 40

Federal Funds Sold and Securi_5

Federal Funds Sold and Securities Financing Activities Netting of Financial Instruments - Repurchase Agreements (Details) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Assets Sold under Agreements to Repurchase [Line Items]
Carrying Value of Securities Purchased under Agreements to Resell and Deposits Paid for Securities Borrowed		$ 1,637	$ 1,473
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	[1]	1,637	1,473
Securities Purchased under Agreements to Resell, Fair Value of Collateral		1,624	1,462
Securities Purchased under Agreements to Resell, Not Subject to Master Netting Arrangement		13	11
Securities Borrowed or Purchased Under Agreements to Resell, Amount Not Offset Against Collateral		0	0
Securities Sold under Agreements to Repurchase, Gross		1,774	1,503
Securities Sold under Agreements to Repurchase		1,774	1,503
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities		1,774	1,503
Securities Sold under Agreements to Repurchase, Not Subject to Master Netting Arrangement		0	0
Securities Sold Under Agreements to Repurchase, Amount Not Offset Against Collateral		$ 0	$ 0
[1]	Excludes $42 million and $65 million of Fed Funds sold, which are not subject to a master netting agreement at December 31, 2018 and 2017

Trading Securities (Detail)

Trading Securities (Detail) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Debt and Equity Securities, FV-NI [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI	[1]	$ 5,506	$ 5,093
Trading liabilities		1,604	1,283
US Treasury Securities [Member]
Debt and Equity Securities, FV-NI [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		262	157
Trading liabilities		801	577
US Government Agencies Debt Securities [Member]
Debt and Equity Securities, FV-NI [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		188	395
US States and Political Subdivisions Debt Securities [Member]
Debt and Equity Securities, FV-NI [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		54	61
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Debt and Equity Securities, FV-NI [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		860	700
Trading liabilities		3	0
Corporate Debt Securities [Member]
Debt and Equity Securities, FV-NI [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		700	655
Trading liabilities		385	289
Commercial Paper [Member]
Debt and Equity Securities, FV-NI [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		190	118
Equity Securities [Member]
Debt and Equity Securities, FV-NI [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		73	56
Trading liabilities		5	9
Derivative Financial Instruments, Assets [Member]
Debt and Equity Securities, FV-NI [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI	[2]	639	802
Loans [Member]
Debt and Equity Securities, FV-NI [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI	[3]	2,540	2,149
Derivative Financial Instruments, Liabilities [Member]
Debt and Equity Securities, FV-NI [Line Items]
Trading liabilities	[2]	$ 410	$ 408
[1]	Includes trading securities pledged as collateral where counterparties have the right to sell or repledge the collateral of $1,442 million and $1,086 million at December?31, 2018 and December?31, 2017, respectively.
[2]	Amounts include the impact of offsetting cash collateral received from and paid to the same derivative counterparties, and the impact of netting derivative assets and derivative liabilities when a legally enforceable master netting agreement or similar agreement exists.
[3]	Includes loans related to TRS

Schedule of Financial Instrumen

Schedule of Financial Instruments Owned and Pledged as Collateral (Detail) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Financial Instruments Owned and Pledged as Collateral [Line Items]
Amount of Repurchase Agreements Secured by Trading Assets		$ 1,400	$ 975
Trading Assets [Member] | Repurchase Agreements [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Security Owned and Pledged as Collateral, Fair Value	[1]	1,418	1,016
Trading Assets [Member] | Derivative [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Security Owned and Pledged as Collateral, Fair Value		22	72
Trading Assets [Member] | Equity Trading [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Security Owned and Pledged as Collateral, Fair Value		$ 40	$ 41
[1]	Repurchase agreements secured by collateral totaled $1.4 billion and $975 million at December 31, 2018 and 2017

Securities Available for Sale_2

Securities Available for Sale (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		$ 31,910	$ 30,913	[1]
Unrealized Gains		142	250	[1]
Unrealized Losses		610	216	[1]
Available-for-sale Securities	[2],[3]	31,442	30,947	[1]
US Treasury Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		4,277	4,361
Unrealized Gains		0	2
Unrealized Losses		66	32
Available-for-sale Securities		4,211	4,331
US Government Agencies Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		221	257
Unrealized Gains		2	3
Unrealized Losses		2	1
Available-for-sale Securities		221	259
US States and Political Subdivisions Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		606	618
Unrealized Gains		4	7
Unrealized Losses		21	8
Available-for-sale Securities		589	617
Asset-backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost			6
Unrealized Gains			2
Unrealized Losses			0
Available-for-sale Securities			8
Other Debt Obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		14	17
Unrealized Gains		0	0
Unrealized Losses		0	0
Available-for-sale Securities		14	17
Commercial Mortgage Backed Securities [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		2,688	2,121
Unrealized Gains		8	3
Unrealized Losses		69	38
Available-for-sale Securities		2,627	2,086
Commercial Mortgage Backed Securities [Member] | Mortgage-backed Securities, Issued by Private Enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		943	862
Unrealized Gains		0	7
Unrealized Losses		27	3
Available-for-sale Securities		916	866
Residential Mortgage Backed Securities [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		23,161	22,616
Unrealized Gains		128	222
Unrealized Losses		425	134
Available-for-sale Securities		$ 22,864	22,704
Residential Mortgage Backed Securities [Member] | Mortgage-backed Securities, Issued by Private Enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost			55
Unrealized Gains			4
Unrealized Losses			0
Available-for-sale Securities			$ 59
[1]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability . See Note 11 , "Other Assets," for additional information.
[2]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities available for sale to Other assets. Reclassifications have been made to previously reported amounts for comparability.
[3]	Includes securities AFS pledged as collateral where counterparties have the right to sell or repledge the collateral of $222 million and $223 million at December?31, 2018 and December?31, 2017, respectively.

Securities Available for Sale_3

Securities Available for Sale (Addition Information) (Detail) - USD ($) $ in Millions		Dec. 31, 2018		Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Restricted		$ 3,300		$ 4,300
Available-for-sale Securities	[1],[2]	31,442		30,947	[3]
Federal Home Loan Bank (FHLB) of Atlanta stock (par value)	[4],[5]	227		15
Federal Reserve Bank Stock	[4],[5]	403		403
Mutual Fund Investments	[4],[5]	79		49
Fair Value, Inputs, Level 3 [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities		0		72
Fair Value, Measurements, Recurring [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities		31,442	[6]	30,947	[7]
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities		$ 0	[6]	$ 72	[7]
[1]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities available for sale to Other assets. Reclassifications have been made to previously reported amounts for comparability.
[2]	Includes securities AFS pledged as collateral where counterparties have the right to sell or repledge the collateral of $222 million and $223 million at December?31, 2018 and December?31, 2017, respectively.
[3]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability . See Note 11 , "Other Assets," for additional information.
[4]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability
[5]	Does not include equity securities held for trading purposes classified as Trading assets and derivative instruments or Trading liabilities and derivative instruments on the Company’s Consolidated Balance Sheets. See Note 5
[6]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability . See Note 11
[7]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability . See Note 11

Interest and dividends on SAFS

Interest and dividends on SAFS (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Debt Securities, Available-for-sale [Line Items]
Interest Income, Securities, Taxable		$ 830	$ 743	$ 630
Interest Income, Securities, Tax Exempt		19	13	6
Interest and Dividend Income, Securities, Available-for-sale	[1],[2]	$ 849	$ 756	$ 636
[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

Amortized Cost and Fair Value o

Amortized Cost and Fair Value of Investments in Debt Securities by Estimated Average Life (Detail) $ in Millions	Dec. 31, 2018USD ($)
Distribution of Maturities: Amortized Cost, 1 Year or Less	$ 1,988
Distribution of Maturities: Amortized Cost, 1-5 Years	6,961
Distribution of Maturities: Amortized Cost, 5-10 Years	20,117
Distribution of Maturities: Amortized Cost, After 10 Years	2,844
Distribution of Maturities: Amortized Cost, Total	31,910
Distribution of Maturities: Fair Value, 1 Year or Less	2,035
Distribution of Maturities: Fair Value, 1-5 Years	6,880
Distribution of Maturities: Fair Value, 5-10 Years	19,751
Distribution of Maturities: Fair Value, After 10 Years	2,776
Distribution of Maturities: Fair Value, Total	$ 31,442
Available For Sale Securities Debt Maturities, Yield, One Year Or Less	3.05%	[1]
Available For Sale Securities Debt Maturities, Yield, After One Through Five Years	2.25%	[1]
Available For Sale Securities Debt Maturities, Yield, After Five Through Ten Years	2.98%	[1]
Available For Sale Securities Debt Maturities, Yield, After Ten Years	3.11%	[1]
Available For Sale Securities Debt Maturities, Yield	2.84%	[1]
US Treasury Securities [Member]
Distribution of Maturities: Amortized Cost, 1 Year or Less	$ 315
Distribution of Maturities: Amortized Cost, 1-5 Years	2,646
Distribution of Maturities: Amortized Cost, 5-10 Years	1,316
Distribution of Maturities: Amortized Cost, After 10 Years	0
Distribution of Maturities: Amortized Cost, Total	4,277
Distribution of Maturities: Fair Value, 1 Year or Less	312
Distribution of Maturities: Fair Value, 1-5 Years	2,603
Distribution of Maturities: Fair Value, 5-10 Years	1,296
Distribution of Maturities: Fair Value, After 10 Years	0
Distribution of Maturities: Fair Value, Total	4,211
US Government Agencies Debt Securities [Member]
Distribution of Maturities: Amortized Cost, 1 Year or Less	112
Distribution of Maturities: Amortized Cost, 1-5 Years	29
Distribution of Maturities: Amortized Cost, 5-10 Years	8
Distribution of Maturities: Amortized Cost, After 10 Years	72
Distribution of Maturities: Amortized Cost, Total	221
Distribution of Maturities: Fair Value, 1 Year or Less	113
Distribution of Maturities: Fair Value, 1-5 Years	29
Distribution of Maturities: Fair Value, 5-10 Years	8
Distribution of Maturities: Fair Value, After 10 Years	71
Distribution of Maturities: Fair Value, Total	221
US States and Political Subdivisions Debt Securities [Member]
Distribution of Maturities: Amortized Cost, 1 Year or Less	2
Distribution of Maturities: Amortized Cost, 1-5 Years	81
Distribution of Maturities: Amortized Cost, 5-10 Years	15
Distribution of Maturities: Amortized Cost, After 10 Years	508
Distribution of Maturities: Amortized Cost, Total	606
Distribution of Maturities: Fair Value, 1 Year or Less	2
Distribution of Maturities: Fair Value, 1-5 Years	84
Distribution of Maturities: Fair Value, 5-10 Years	16
Distribution of Maturities: Fair Value, After 10 Years	487
Distribution of Maturities: Fair Value, Total	589
Other Debt Obligations [Member]
Distribution of Maturities: Amortized Cost, 1 Year or Less	0
Distribution of Maturities: Amortized Cost, 1-5 Years	14
Distribution of Maturities: Amortized Cost, 5-10 Years	0
Distribution of Maturities: Amortized Cost, After 10 Years	0
Distribution of Maturities: Amortized Cost, Total	14
Distribution of Maturities: Fair Value, 1 Year or Less	0
Distribution of Maturities: Fair Value, 1-5 Years	14
Distribution of Maturities: Fair Value, 5-10 Years	0
Distribution of Maturities: Fair Value, After 10 Years	0
Distribution of Maturities: Fair Value, Total	14
Residential Mortgage Backed Securities [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Distribution of Maturities: Amortized Cost, 1 Year or Less	1,558
Distribution of Maturities: Amortized Cost, 1-5 Years	3,684
Distribution of Maturities: Amortized Cost, 5-10 Years	15,962
Distribution of Maturities: Amortized Cost, After 10 Years	1,957
Distribution of Maturities: Amortized Cost, Total	23,161
Distribution of Maturities: Fair Value, 1 Year or Less	1,607
Distribution of Maturities: Fair Value, 1-5 Years	3,655
Distribution of Maturities: Fair Value, 5-10 Years	15,682
Distribution of Maturities: Fair Value, After 10 Years	1,920
Distribution of Maturities: Fair Value, Total	22,864
Commercial Mortgage Backed Securities [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Distribution of Maturities: Amortized Cost, 1 Year or Less	1
Distribution of Maturities: Amortized Cost, 1-5 Years	495
Distribution of Maturities: Amortized Cost, 5-10 Years	1,885
Distribution of Maturities: Amortized Cost, After 10 Years	307
Distribution of Maturities: Amortized Cost, Total	2,688
Distribution of Maturities: Fair Value, 1 Year or Less	1
Distribution of Maturities: Fair Value, 1-5 Years	483
Distribution of Maturities: Fair Value, 5-10 Years	1,845
Distribution of Maturities: Fair Value, After 10 Years	298
Distribution of Maturities: Fair Value, Total	2,627
Commercial Mortgage Backed Securities [Member] | Mortgage-backed Securities, Issued by Private Enterprises [Member]
Distribution of Maturities: Amortized Cost, 1 Year or Less	0
Distribution of Maturities: Amortized Cost, 1-5 Years	12
Distribution of Maturities: Amortized Cost, 5-10 Years	931
Distribution of Maturities: Amortized Cost, After 10 Years	0
Distribution of Maturities: Amortized Cost, Total	943
Distribution of Maturities: Fair Value, 1 Year or Less	0
Distribution of Maturities: Fair Value, 1-5 Years	12
Distribution of Maturities: Fair Value, 5-10 Years	904
Distribution of Maturities: Fair Value, After 10 Years	0
Distribution of Maturities: Fair Value, Total	$ 916
[1]	Weighted average yields are based on amortized cost and presented on an FTE basis.

Securities with Unrealized Loss

Securities with Unrealized Losses (Detail) - USD ($) $ in Millions		Dec. 31, 2018		Dec. 31, 2017
Investments, Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 1,452	[1]	$ 11,409	[2],[3]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		7	[1],[4]	63	[2],[3],[5]
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		22,822	[1]	6,736	[2],[3]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		603	[1],[4]	153	[2],[3],[5]
Total, Fair Value		24,274	[1]	18,145	[2],[3]
Total, Unrealized Losses		610	[1],[4]	216	[2],[3],[5]
Other Than Temporarily Impaired Securities [Member]
Investments, Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		0	[1]	0	[3]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		0	[1],[4]	0	[3],[5]
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		0	[1]	1	[3]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		0	[1],[4]	0	[3],[5]
Total, Fair Value		0	[1]	1	[3]
Total, Unrealized Losses		0	[1],[4]	0	[3],[5]
Other Than Temporarily Impaired Securities [Member] | Asset-backed Securities [Member]
Investments, Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	[3]			0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	[3],[5]			0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	[3]			1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	[3],[5]			0
Total, Fair Value	[3]			1
Total, Unrealized Losses	[3],[5]			0
Temporarily Impaired Securities [Member]
Investments, Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		1,452		11,409	[2]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		7	[4]	63	[2],[5]
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		22,822		6,735	[2]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		603	[4]	153	[2],[5]
Total, Fair Value		24,274		18,144	[2]
Total, Unrealized Losses		610	[4]	216	[2],[5]
Temporarily Impaired Securities [Member] | US Treasury Securities [Member]
Investments, Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		0		1,993
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		0	[4]	12	[5]
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		4,177		841
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		66	[4]	20	[5]
Total, Fair Value		4,177		2,834
Total, Unrealized Losses		66	[4]	32	[5]
Temporarily Impaired Securities [Member] | US Government Agencies Debt Securities [Member]
Investments, Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		0		23
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		0	[4]	0	[5]
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		63		60
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		2	[4]	1	[5]
Total, Fair Value		63		83
Total, Unrealized Losses		2	[4]	1	[5]
Temporarily Impaired Securities [Member] | US States and Political Subdivisions Debt Securities [Member]
Investments, Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		49		267
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		1	[4]	3	[5]
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		430		114
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		20	[4]	5	[5]
Total, Fair Value		479		381
Total, Unrealized Losses		21	[4]	8	[5]
Temporarily Impaired Securities [Member] | Asset-backed Securities [Member]
Investments, Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value				0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	[5]			0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value				4
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	[5]			0
Total, Fair Value				4
Total, Unrealized Losses	[5]			0
Temporarily Impaired Securities [Member] | Other Debt Obligations [Member]
Investments, Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		0		10
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		0	[4]	0	[5]
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		9		0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		0	[4]	0	[5]
Total, Fair Value		9		10
Total, Unrealized Losses		0	[4]	0	[5]
Temporarily Impaired Securities [Member] | Commercial Mortgage Backed Securities [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Investments, Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		68		887
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		0	[4]	9	[5]
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		1,986		915
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		69	[4]	29	[5]
Total, Fair Value		2,054		1,802
Total, Unrealized Losses		69	[4]	38	[5]
Temporarily Impaired Securities [Member] | Commercial Mortgage Backed Securities [Member] | Mortgage-backed Securities, Issued by Private Enterprises [Member]
Investments, Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		106		134
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		1	[4]	1	[5]
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		773		93
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		26	[4]	2	[5]
Total, Fair Value		879		227
Total, Unrealized Losses		27	[4]	3	[5]
Temporarily Impaired Securities [Member] | Residential Mortgage Backed Securities [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Investments, Unrealized Loss Position [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		1,229		8,095
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		5	[4]	38	[5]
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		15,384		4,708
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		420	[4]	96	[5]
Total, Fair Value		16,613		12,803
Total, Unrealized Losses		$ 425	[4]	$ 134	[5]
[1]	OTTI securities AFS are impaired securities for which OTTI
[2]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability
[3]	OTTI securities AFS are impaired securities for which OTTI
[4]	Unrealized losses less than $0.5 million are presented as zero within the table.
[5]	Unrealized losses less than $0.5 million are presented as zero within the table.

Gross Realized Gains and Losses

Gross Realized Gains and Losses on Sales and OTTI on Securities Available for Sale (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Available-for-sale Securities, Gross Realized Gains		$ 9	$ 3		$ 4
Available-for-sale Securities, Gross Realized Losses		(8)	(110)		0
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Period Increase (Decrease)		0	(1)		0
Debt and Equity Securities, Gain (Loss)		1	(108)		$ 4
Available-for-sale Securities	[1],[2]	$ 31,442	$ 30,947	[3]
[1]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities available for sale to Other assets. Reclassifications have been made to previously reported amounts for comparability.
[2]	Includes securities AFS pledged as collateral where counterparties have the right to sell or repledge the collateral of $222 million and $223 million at December?31, 2018 and December?31, 2017, respectively.
[3]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability . See Note 11 , "Other Assets," for additional information.

Rollforward of Credit Losses Re

Rollforward of Credit Losses Recognized in Earnings Related to Securities (Detail) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
		Dec. 31, 2018	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Debt Securities, Available-for-sale [Line Items]
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Period Increase (Decrease)			$ 0	$ 1		$ 0
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold			(23)
Available-for-sale Securities	[1],[2]	$ 31,442	31,442	30,947	[3]
Ending balance		0	0	$ 23		$ 23
Gains on sale of OTTI securities		$ 6	$ 6
[1]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities available for sale to Other assets. Reclassifications have been made to previously reported amounts for comparability.
[2]	Includes securities AFS pledged as collateral where counterparties have the right to sell or repledge the collateral of $222 million and $223 million at December?31, 2018 and December?31, 2017, respectively.
[3]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability . See Note 11 , "Other Assets," for additional information.

Loans - Additional Information

Loans - Additional Information (Details) - USD ($) $ in Millions		Dec. 31, 2018		Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Long-term Debt	[1],[2]	$ 15,072		$ 9,785
Other Short-term Borrowings		4,857		717
Loans held for investment	[3]	151,839		143,181
Finance Leases Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		$ 4,100		$ 3,700
Federal National Mortgage Association (FNMA) Insured Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Loan Portfolio Current		27.00%		28.00%
Loans held for investment		$ 459		$ 560
Government Guarantee Percent		1.00%	[4]	1.00%
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Loan Portfolio Current		72.00%		75.00%
Loans held for investment		$ 7,229		$ 6,600
Consumer Indirect [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		12,419		12,140
Residential Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		$ 38,900		$ 38,600
Percentage of Loans Held for Investment		26.00%		27.00%
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		$ 80,940		$ 75,477
Geographic Distribution, Foreign [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		1,800		1,400
Home Equity Line of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	[5]	9,468		10,626
Minimum [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans And Leases Receivable Individually Evaluated For Impairment		3		3
Home Equity Line of Credit [Member] | Credit Concentration Risk [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unused Commitments to Extend Credit		10,300		10,100
Mortgage Loans on Real Estate [Member] | Credit Concentration Risk [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unused Commitments to Extend Credit		2,700		3,000
Federal Home Loan Bank Advances [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Other Short-term Borrowings		4,000		0
Federal Home Loan Bank Advances [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Long-term Debt		$ 5,000		$ 4
[1]	Includes $289 million and $530 million of long-term debt measured at fair value at December 31, 2018 and 2017
[2]	Includes debt of consolidated VIEs of $161 million and $189 million at December?31, 2018 and December?31, 2017, respectively.
[3]	Includes loans of consolidated VIEs of $153 million and $179 million at December?31, 2018 and December?31, 2017, respectively.
[4]	Includes 3,321 loans with a carrying value of $41 million that were modified prior to 2016 and reclassified as TDRs in the fourth quarter of 2016.
[5]	Excludes $7.2 billion and $6.6 billion of guaranteed student loans and $459 million and $560 million of guaranteed residential mortgages at December 31, 2018 and 2017

Composition of the Company's Lo

Composition of the Company's Loan Portfolio (Detail) - USD ($) $ in Millions		Dec. 31, 2018		Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	[1]	$ 151,839		$ 143,181
Loans Held for Sale	[2]	1,468		2,290
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	[3]	71,137		66,356
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		7,265		5,317
Commercial Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		2,538		3,804
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		80,940		75,477
Federal National Mortgage Association (FNMA) Insured Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		459		560
Residential Nonguaranteed [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	[5],[6]	28,836	[4]	27,136	[7]
Home Equity Line of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	[5]	9,468		10,626
Residential Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	[5]	184		298
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		7,229		6,600
Consumer Other Direct [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		10,615		8,729
Consumer Indirect [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		12,419		12,140
Credit Card Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		1,689		1,582
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		$ 70,899		$ 67,704
[1]	Includes loans of consolidated VIEs of $153 million and $179 million at December?31, 2018 and December?31, 2017, respectively.
[2]	Includes $1.2 billion and $1.6 billion of LHFS measured at fair value at December 31, 2018 and 2017
[3]	Includes $4.1 billion and $3.7 billion of lease financing, and $796 million and $778 million of installment loans at December 31, 2018 and 2017
[4]	I ncludes $163 million of loans measured at fair value, the majority
[5]	Excludes $7.2 billion and $6.6 billion of guaranteed student loans and $459 million and $560 million of guaranteed residential mortgages at December 31, 2018 and 2017
[6]	Includes $163 million and $196 million of LHFI measured at fair value at December 31, 2018 and 2017
[7]	Includes $196 million

Composition of the Company's _2

Composition of the Company's Loan Portfolio (Additional Information) (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Letters of Credit Outstanding, Amount		$ 5,800	$ 6,700
Loans and Leases Receivable, Gross	[1]	151,839	143,181
Loans Receivable, Fair Value Disclosure		163	196
Loans Held-for-sale, Fair Value Disclosure		1,200	1,600
Transfer of Portfolio Loans and Leases to Held-for-sale		532	288	$ 360
Transfer of Loans Held-for-sale to Portfolio Loans		28	19	30
Transfer to Other Real Estate		62	57	$ 59
Consumer Indirect [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross		12,419	12,140
Finance Leases Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross		4,100	3,700
Installment Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross		796	778
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross		70,899	67,704
Loans Receivable, Fair Value Disclosure		163	196
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross		80,940	75,477
Loans Receivable, Fair Value Disclosure		$ 0	$ 0
Federal National Mortgage Association (FNMA) Insured Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Loan Portfolio Current		27.00%	28.00%
Loans and Leases Receivable, Gross		$ 459	$ 560
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Loan Portfolio Current		72.00%	75.00%
Loans and Leases Receivable, Gross		$ 7,229	$ 6,600
Credit Concentration Risk [Member] | Home Equity Line of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unused Commitments to Extend Credit		10,300	10,100
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Significant Sales	[2],[3]	170	703
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Significant Sales	[2],[3]	99	2
Federal Reserve Bank Advances [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Pledged as Collateral		28,100	24,300
Line of Credit Facility, Remaining Borrowing Capacity		21,300	18,200
Federal Home Loan Bank Advances [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Pledged as Collateral		39,200	38,000
Line of Credit Facility, Remaining Borrowing Capacity		31,000	30,500
Non-recurring loan purchase [Member] | Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Significant Purchases	[4]	101	233
Recurring loan purchase [Member] | Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Significant Purchases	[5]	$ 2,122	$ 1,729
[1]	Includes loans of consolidated VIEs of $153 million and $179 million at December?31, 2018 and December?31, 2017, respectively.
[2]	Net gain on loan sales were immaterial during the years ended December 31, 2018 and 2017
[3]	Excludes sales of residential and commercial mortgage LHFS conducted in the normal course of business.
[4]	Purchases are episodic in nature and are conducted based on specific business strategies.
[5]	Purchases are episodic in nature and are conducted based on specific business strategies.

LHFI by Credit Quality Indicato

LHFI by Credit Quality Indicator (Detail) - USD ($) $ in Millions		Dec. 31, 2018		Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	[1]	$ 151,839		$ 143,181
Financing Receivable, Recorded Investment, Nonaccrual Status	[2]	526	[3]	674	[4]
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	[5]	71,137		66,356
Financing Receivable, Recorded Investment, Nonaccrual Status		157	[3]	215	[4]
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		7,265		5,317
Financing Receivable, Recorded Investment, Nonaccrual Status		2	[3]	24	[4]
Commercial Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		2,538		3,804
Financing Receivable, Recorded Investment, Nonaccrual Status		0	[3]	1	[4]
Residential Nonguaranteed [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	[7],[8]	28,836	[6]	27,136	[9]
Financing Receivable, Recorded Investment, Nonaccrual Status		204	[3],[6]	206	[4],[9]
Home Equity Line of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	[7]	9,468		10,626
Financing Receivable, Recorded Investment, Nonaccrual Status		138	[3]	203	[4]
Residential Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	[7]	184		298
Financing Receivable, Recorded Investment, Nonaccrual Status		11	[3]	11	[4]
Consumer Other Direct [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		10,615		8,729
Financing Receivable, Recorded Investment, Nonaccrual Status		7	[3]	7	[4]
Consumer Indirect [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		12,419		12,140
Financing Receivable, Recorded Investment, Nonaccrual Status		7	[3]	7	[4]
Credit Card Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		1,689		1,582
Financing Receivable, Recorded Investment, Nonaccrual Status		0	[3]	0	[4]
Pass | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		69,095		64,546
Pass | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		7,165		5,126
Pass | Commercial Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		2,459		3,770
Criticized Accruing | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		1,885		1,595
Criticized Accruing | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		98		167
Criticized Accruing | Commercial Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		79		33
FICO Score 700 and Above [Member] | Residential Nonguaranteed [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	[7]	25,764		23,602
FICO Score 700 and Above [Member] | Home Equity Line of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	[7]	8,060		8,946
FICO Score 700 and Above [Member] | Residential Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	[7]	151		240
FICO Score 700 and Above [Member] | Consumer Other Direct [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		9,642		7,929
FICO Score 700 and Above [Member] | Consumer Indirect [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		9,315		9,094
FICO Score 700 and Above [Member] | Credit Card Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		1,142		1,088
FICO Score Between 620 and 699 | Residential Nonguaranteed [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	[7]	2,367		2,721
FICO Score Between 620 and 699 | Home Equity Line of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	[7]	1,015		1,242
FICO Score Between 620 and 699 | Residential Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	[7]	27		50
FICO Score Between 620 and 699 | Consumer Other Direct [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		935		757
FICO Score Between 620 and 699 | Consumer Indirect [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		2,395		2,344
FICO Score Between 620 and 699 | Credit Card Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment		420		395
FICO Score Below 620 | Residential Nonguaranteed [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	[7],[10]	705		813
FICO Score Below 620 | Home Equity Line of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	[7],[10]	393		438
FICO Score Below 620 | Residential Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	[7],[10]	6		8
FICO Score Below 620 | Consumer Other Direct [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	[10]	38		43
FICO Score Below 620 | Consumer Indirect [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	[10]	709		702
FICO Score Below 620 | Credit Card Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	[10]	$ 127		$ 99
[1]	Includes loans of consolidated VIEs of $153 million and $179 million at December?31, 2018 and December?31, 2017, respectively.
[2]	Nonaccruing restructured loans are included in total nonaccrual loans
[3]	Includes nonaccruing LHFI past due 90 days or more of $306 million
[4]	Includes nonaccruing LHFI past due 90 days or more of $357 million . Nonaccruing LHFI past due fewer than 90 days include nonaccrual loans modified in TDRs, performing second lien loans where the first lien loan is nonperforming, and certain energy-related commercial loans.
[5]	Includes $4.1 billion and $3.7 billion of lease financing, and $796 million and $778 million of installment loans at December 31, 2018 and 2017
[6]	I ncludes $163 million of loans measured at fair value, the majority
[7]	Excludes $7.2 billion and $6.6 billion of guaranteed student loans and $459 million and $560 million of guaranteed residential mortgages at December 31, 2018 and 2017
[8]	Includes $163 million and $196 million of LHFI measured at fair value at December 31, 2018 and 2017
[9]	Includes $196 million
[10]	For substantially all loans with refreshed FICO scores below 620, the borrower’s FICO score at the time of origination exceeded 620 but has since deteriorated as the loan has seasoned.

LHFI by Credit Quality Indica_2

LHFI by Credit Quality Indicator (Additional Information) (Detail) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	[1]	$ 151,839	$ 143,181
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross		80,940	75,477
Federal National Mortgage Association (FNMA) Insured Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross		459	560
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross		$ 7,229	$ 6,600
[1]	Includes loans of consolidated VIEs of $153 million and $179 million at December?31, 2018 and December?31, 2017, respectively.

Payment Status for the LHFI Por

Payment Status for the LHFI Portfolio (Detail) - USD ($) $ in Millions		Dec. 31, 2018		Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current		$ 148,548		$ 139,956
Accruing 30-89 Days Past Due		1,113		1,146
Accruing 90+ Days Past Due		1,652		1,405
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	526	[2]	674	[3]
Total	[4]	151,839		143,181
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current		70,901		66,092
Accruing 30-89 Days Past Due		64		42
Accruing 90+ Days Past Due		15		7
Financing Receivable, Recorded Investment, Nonaccrual Status		157	[2]	215	[3]
Total	[5]	71,137		66,356
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current		7,259		5,293
Accruing 30-89 Days Past Due		3		0
Accruing 90+ Days Past Due		1		0
Financing Receivable, Recorded Investment, Nonaccrual Status		2	[2]	24	[3]
Total		7,265		5,317
Commercial Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current		2,538		3,803
Accruing 30-89 Days Past Due		0		0
Accruing 90+ Days Past Due		0		0
Financing Receivable, Recorded Investment, Nonaccrual Status		0	[2]	1	[3]
Total		2,538		3,804
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current		80,698		75,188
Accruing 30-89 Days Past Due		67		42
Accruing 90+ Days Past Due		16		7
Financing Receivable, Recorded Investment, Nonaccrual Status		159	[2]	240	[3]
Total		80,940		75,477
Federal National Mortgage Association (FNMA) Insured Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current		125		159
Accruing 30-89 Days Past Due		39		55
Accruing 90+ Days Past Due		295		346
Financing Receivable, Recorded Investment, Nonaccrual Status		0	[2],[6]	0	[3]
Total		459		560
Residential Nonguaranteed [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current		28,552	[7]	26,778	[8]
Accruing 30-89 Days Past Due		70	[7]	148	[8]
Accruing 90+ Days Past Due		10	[7]	4	[8]
Financing Receivable, Recorded Investment, Nonaccrual Status		204	[2],[7]	206	[3],[8]
Total	[9],[10]	28,836	[7]	27,136	[8]
Home Equity Line of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current		9,268		10,348
Accruing 30-89 Days Past Due		62		75
Accruing 90+ Days Past Due		0		0
Financing Receivable, Recorded Investment, Nonaccrual Status		138	[2]	203	[3]
Total	[9]	9,468		10,626
Residential Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current		170		280
Accruing 30-89 Days Past Due		3		7
Accruing 90+ Days Past Due		0		0
Financing Receivable, Recorded Investment, Nonaccrual Status		11	[2]	11	[3]
Total	[9]	184		298
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current		5,236		4,946
Accruing 30-89 Days Past Due		685		659
Accruing 90+ Days Past Due		1,308		1,028
Financing Receivable, Recorded Investment, Nonaccrual Status		0	[2],[6]	0	[3],[11]
Total		7,229		6,600
Consumer Other Direct [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current		10,559		8,679
Accruing 30-89 Days Past Due		45		36
Accruing 90+ Days Past Due		4		7
Financing Receivable, Recorded Investment, Nonaccrual Status		7	[2]	7	[3]
Total		10,615		8,729
Consumer Indirect [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current		12,286		12,022
Accruing 30-89 Days Past Due		125		111
Accruing 90+ Days Past Due		1		0
Financing Receivable, Recorded Investment, Nonaccrual Status		7	[2]	7	[3]
Total		12,419		12,140
Credit Card Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current		1,654		1,556
Accruing 30-89 Days Past Due		17		13
Accruing 90+ Days Past Due		18		13
Financing Receivable, Recorded Investment, Nonaccrual Status		0	[2]	0	[3]
Total		1,689		1,582
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Current		67,850		64,768
Accruing 30-89 Days Past Due		1,046		1,104
Accruing 90+ Days Past Due		1,636		1,398
Financing Receivable, Recorded Investment, Nonaccrual Status		367	[2]	434	[3]
Total		$ 70,899		$ 67,704
[1]	Nonaccruing restructured loans are included in total nonaccrual loans
[2]	Includes nonaccruing LHFI past due 90 days or more of $306 million
[3]	Includes nonaccruing LHFI past due 90 days or more of $357 million . Nonaccruing LHFI past due fewer than 90 days include nonaccrual loans modified in TDRs, performing second lien loans where the first lien loan is nonperforming, and certain energy-related commercial loans.
[4]	Includes loans of consolidated VIEs of $153 million and $179 million at December?31, 2018 and December?31, 2017, respectively.
[5]	Includes $4.1 billion and $3.7 billion of lease financing, and $796 million and $778 million of installment loans at December 31, 2018 and 2017
[6]	Guaranteed loans are not placed on nonaccrual status regardless of delinquency because collection of principal and interest is reasonably assured by the government.
[7]	I ncludes $163 million of loans measured at fair value, the majority
[8]	Includes $196 million
[9]	Excludes $7.2 billion and $6.6 billion of guaranteed student loans and $459 million and $560 million of guaranteed residential mortgages at December 31, 2018 and 2017
[10]	Includes $163 million and $196 million of LHFI measured at fair value at December 31, 2018 and 2017
[11]	Guaranteed loans are not placed on nonaccrual status regardless of delinquency because collection of principal and interest is reasonably assured by the government.

Payment Status for the LHFI P_2

Payment Status for the LHFI Portfolio (Additional Information) (Detail) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
Loans Receivable, Fair Value Disclosure	$ 163	$ 196
Nonaccruing 90 Plus Days Past Due	306	357
Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans Receivable, Fair Value Disclosure	$ 163	$ 196

LHFI Considered Impaired (Detai

LHFI Considered Impaired (Detail) - USD ($)		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance		$ 2,890,000,000		$ 3,046,000,000
Impaired Financing Receivable, Recorded Investment	[1]	2,611,000,000		2,821,000,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment		167,000,000		204,000,000
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		2,743,000,000		2,866,000,000		$ 3,045,000,000
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		127,000,000	[2]	125,000,000	[2]	128,000,000
Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		132,000,000		38,000,000
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[1]	79,000,000		35,000,000
Impaired Financing Receivable, Unpaid Principal Balance		81,000,000		127,000,000
Impaired Financing Receivable, Recorded Investment	[1]	70,000,000		117,000,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment		13,000,000		19,000,000
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		121,000,000		34,000,000		169,000,000
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		7,000,000	[2]	1,000,000	[2]	3,000,000
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		71,000,000		112,000,000		170,000,000
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		1,000,000	[2]	2,000,000	[2]	1,000,000
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		10,000,000		0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[1]	0		0
Impaired Financing Receivable, Unpaid Principal Balance		0		21,000,000
Impaired Financing Receivable, Recorded Investment	[1]	0		21,000,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment		0		2,000,000
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		39,000,000		0		0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		0		0		0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		0		22,000,000		25,000,000
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0	[2]	1,000,000	[2]	1,000,000
Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		142,000,000		38,000,000
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[1]	79,000,000		35,000,000
Impaired Financing Receivable, Unpaid Principal Balance		81,000,000		148,000,000
Impaired Financing Receivable, Recorded Investment	[1]	70,000,000		138,000,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment		13,000,000		21,000,000
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		160,000,000		34,000,000		169,000,000
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		7,000,000	[2]	1,000,000	[2]	3,000,000
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		71,000,000		134,000,000		195,000,000
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		1,000,000	[2]	3,000,000	[2]	2,000,000
Residential Nonguaranteed [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		501,000,000		458,000,000
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[1]	397,000,000		363,000,000
Impaired Financing Receivable, Unpaid Principal Balance		1,006,000,000		1,133,000,000
Impaired Financing Receivable, Recorded Investment	[1]	984,000,000		1,103,000,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment		96,000,000		113,000,000
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		404,000,000		357,000,000		370,000,000
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		19,000,000	[2]	15,000,000	[2]	16,000,000
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		993,000,000		1,123,000,000		1,251,000,000
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		48,000,000	[2]	58,000,000	[2]	64,000,000
Home Equity Line of Credit [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance		849,000,000		953,000,000
Impaired Financing Receivable, Recorded Investment	[1]	799,000,000		895,000,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment		44,000,000		54,000,000
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		816,000,000		914,000,000		812,000,000
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		36,000,000	[2]	32,000,000	[2]	29,000,000
Residential Construction [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		12,000,000		15,000,000
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[1]	7,000,000		9,000,000
Impaired Financing Receivable, Unpaid Principal Balance		79,000,000		93,000,000
Impaired Financing Receivable, Recorded Investment	[1]	76,000,000		90,000,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment		6,000,000		7,000,000
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		8,000,000		8,000,000		8,000,000
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		1,000,000	[2]	0	[2]	0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		78,000,000		94,000,000		110,000,000
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		3,000,000	[2]	5,000,000	[2]	6,000,000
Consumer Other Direct [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance		57,000,000		59,000,000
Impaired Financing Receivable, Recorded Investment	[1]	57,000,000		59,000,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment		1,000,000		1,000,000
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		58,000,000		60,000,000		10,000,000
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		4,000,000	[2]	4,000,000	[2]	1,000,000
Consumer Indirect [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance		133,000,000		123,000,000
Impaired Financing Receivable, Recorded Investment	[1]	133,000,000		122,000,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment		5,000,000		7,000,000
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		147,000,000		136,000,000		114,000,000
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		7,000,000	[2]	6,000,000	[2]	6,000,000
Credit Card Receivable [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance		30,000,000		26,000,000
Impaired Financing Receivable, Recorded Investment	[1]	9,000,000		7,000,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment		2,000,000		1,000,000
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		8,000,000		6,000,000		6,000,000
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		1,000,000	[2]	1,000,000	[2]	1,000,000
Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		513,000,000		473,000,000
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[1]	404,000,000		372,000,000
Impaired Financing Receivable, Unpaid Principal Balance		2,154,000,000		2,387,000,000
Impaired Financing Receivable, Recorded Investment	[1]	2,058,000,000		2,276,000,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment		154,000,000		183,000,000
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		412,000,000		365,000,000		378,000,000
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		20,000,000	[2]	15,000,000	[2]	16,000,000
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		2,100,000,000		2,333,000,000		2,303,000,000
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		$ 99,000,000	[2]	$ 106,000,000	[2]	$ 107,000,000
[1]	Carrying value reflects charge-offs that have been recognized plus other amounts that have been applied to adjust the net book balance.
[2]	Of the interest income recognized during the years ended December 31, 2018, 2017, and 2016

LHFI Considered Impaired (Addit

LHFI Considered Impaired (Additional Information) (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Gross	[1]	$ 151,839	$ 143,181
Transfer of Loans Held-for-sale to Portfolio Loans		28	19	$ 30
Financing Receivable, Modifications, Post-Modification Recorded Investment		266	373	$ 482
Accrual Loans [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Modifications, Recorded Investment		$ 2,300	$ 2,400
Percentage Of Accruing Troubled Debt Restructurings, Current		97.00%	96.00%
Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Gross		$ 80,940	$ 75,477
Consumer Other Direct [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Gross		$ 10,615	$ 8,729
[1]	Includes loans of consolidated VIEs of $153 million and $179 million at December?31, 2018 and December?31, 2017, respectively.

Nonperforming Assets (Detail)

Nonperforming Assets (Detail) - USD ($) $ in Millions		Dec. 31, 2018		Dec. 31, 2017
Financing Receivable, Recorded Investment, Nonaccrual Status	[1]	$ 526	[2]	$ 674	[3]
OREO	[4]	54		57
Other repossessed assets		9		10
Total nonperforming assets		589		741
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status		157	[2]	215	[3]
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status		2	[2]	24	[3]
Commercial Construction [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status		0	[2]	1	[3]
Residential Nonguaranteed [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status		204	[2],[5]	206	[3],[6]
Home Equity Line of Credit [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status		138	[2]	203	[3]
Residential Construction [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status		11	[2]	11	[3]
Consumer Other Direct [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status		7	[2]	7	[3]
Consumer Indirect [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status		$ 7	[2]	$ 7	[3]
[1]	Nonaccruing restructured loans are included in total nonaccrual loans
[2]	Includes nonaccruing LHFI past due 90 days or more of $306 million
[3]	Includes nonaccruing LHFI past due 90 days or more of $357 million . Nonaccruing LHFI past due fewer than 90 days include nonaccrual loans modified in TDRs, performing second lien loans where the first lien loan is nonperforming, and certain energy-related commercial loans.
[4]	Does not include foreclosed real estate related to loans insured by the FHA or guaranteed by the VA . Proceeds due from the FHA and the VA are recorded as a receivable in Other assets in the Consolidated Balance Sheets until the property is conveyed and the funds are received. The receivable related to proceeds due from the FHA and the VA totaled $50 million and $45 million at December 31, 2018 and 2017 , respectively.
[5]	I ncludes $163 million of loans measured at fair value, the majority
[6]	Includes $196 million

Nonperforming Assets (Additiona

Nonperforming Assets (Additional Information) (Detail) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Other Real Estate	[1]	$ 54	$ 57
Accrual Loans [Member]
Mortgage Loans in Process of Foreclosure, Amount		110	101
Proceeds due from FHA or VA [Member]
Mortgage Loans in Process of Foreclosure, Amount		103	97
Other Real Estate		50	45
Nonaccrual loans [Member]
Mortgage Loans in Process of Foreclosure, Amount		93	73
Residential Portfolio Segment [Member]
Other Real Estate		50	51
Commercial Portfolio Segment [Member]
Other Real Estate		2	4
Land and Land Improvements [Member]
Other Real Estate		$ 2	$ 2
[1]	Does not include foreclosed real estate related to loans insured by the FHA or guaranteed by the VA . Proceeds due from the FHA and the VA are recorded as a receivable in Other assets in the Consolidated Balance Sheets until the property is conveyed and the funds are received. The receivable related to proceeds due from the FHA and the VA totaled $50 million and $45 million at December 31, 2018 and 2017 , respectively.

Loans TDR Modifications (Detail

Loans TDR Modifications (Details) $ in Millions		12 Months Ended
		Dec. 31, 2018USD ($)contracts		Dec. 31, 2017USD ($)contracts		Dec. 31, 2016USD ($)contracts
Financing Receivable, Modifications [Line Items]
Financing Receivable, Restructured During Period, Number Of Contracts | contracts		5,694	[1]	7,136	[2]	9,278	[3]
Financing Receivable, Amount Restructured During Period, Rate Modifications Granted		$ 28		$ 74		$ 93
Financing Receivable, Amount Restructured During Period, Term Extension and/or Other Concessions Granted		238		299		389
Financing Receivable, Amount Restructured During Period		$ 266		$ 373		$ 482
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Restructured During Period, Number Of Contracts | contracts	[1]	1
Financing Receivable, Amount Restructured During Period, Rate Modifications Granted		$ 0
Financing Receivable, Amount Restructured During Period, Term Extension and/or Other Concessions Granted		0
Financing Receivable, Amount Restructured During Period		$ 0
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Restructured During Period, Number Of Contracts | contracts		169	[1]	178	[2]	84	[3]
Financing Receivable, Amount Restructured During Period, Rate Modifications Granted		$ 2		$ 3		$ 2
Financing Receivable, Amount Restructured During Period, Term Extension and/or Other Concessions Granted		77		43		68
Financing Receivable, Amount Restructured During Period		$ 79		$ 46		$ 70
Residential Construction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Restructured During Period, Number Of Contracts | contracts		4	[1]			1	[3]
Financing Receivable, Amount Restructured During Period, Rate Modifications Granted		$ 0				$ 0
Financing Receivable, Amount Restructured During Period, Term Extension and/or Other Concessions Granted		0				0
Financing Receivable, Amount Restructured During Period		$ 0				$ 0
Home Equity Line of Credit [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Restructured During Period, Number Of Contracts | contracts		525	[1]	2,488	[2]	2,611	[3]
Financing Receivable, Amount Restructured During Period, Rate Modifications Granted		$ 2		$ 45		$ 9
Financing Receivable, Amount Restructured During Period, Term Extension and/or Other Concessions Granted		41		176		227
Financing Receivable, Amount Restructured During Period		$ 43		$ 221		$ 236
Residential Nonguaranteed [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Restructured During Period, Number Of Contracts | contracts		299	[1]	150	[2]	397	[3]
Financing Receivable, Amount Restructured During Period, Rate Modifications Granted		$ 19		$ 22		$ 79
Financing Receivable, Amount Restructured During Period, Term Extension and/or Other Concessions Granted		52		10		12
Financing Receivable, Amount Restructured During Period		$ 71		$ 32		$ 91
Credit Card Receivable [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Restructured During Period, Number Of Contracts | contracts		1,410	[1]	919	[2]	720	[3]
Financing Receivable, Amount Restructured During Period, Rate Modifications Granted		$ 5		$ 4		$ 3
Financing Receivable, Amount Restructured During Period, Term Extension and/or Other Concessions Granted		0		0		0
Financing Receivable, Amount Restructured During Period		$ 5		$ 4		$ 3
Consumer Indirect [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Restructured During Period, Number Of Contracts | contracts		2,585	[1]	2,740	[2]	1,539	[3]
Financing Receivable, Amount Restructured During Period, Rate Modifications Granted		$ 0		$ 0		$ 0
Financing Receivable, Amount Restructured During Period, Term Extension and/or Other Concessions Granted		58		61		32
Financing Receivable, Amount Restructured During Period		$ 58		$ 61		$ 32
Consumer Other Direct [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Restructured During Period, Number Of Contracts | contracts		701	[1]	661	[2]	3,925	[3],[4]
Financing Receivable, Amount Restructured During Period, Rate Modifications Granted		$ 0		$ 0		$ 0
Financing Receivable, Amount Restructured During Period, Term Extension and/or Other Concessions Granted		10		9		50	[4]
Financing Receivable, Amount Restructured During Period		$ 10		$ 9		$ 50	[4]
Commercial Construction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Restructured During Period, Number Of Contracts | contracts	[3]					1
Financing Receivable, Amount Restructured During Period, Rate Modifications Granted						$ 0
Financing Receivable, Amount Restructured During Period, Term Extension and/or Other Concessions Granted						0
Financing Receivable, Amount Restructured During Period						$ 0
[1]	Includes loans modified under the terms of a TDR that were charged-off during the period.
[2]	Includes loans modified under the terms of a TDR that were charged-off during the period.
[3]	Includes loans modified under the terms of a TDR that were charged-off during the period.
[4]	Includes 3,321 loans with a carrying value of $41 million that were modified prior to 2016 and reclassified as TDRs in the fourth quarter of 2016.

Loans Mortgages With Potential

Loans Mortgages With Potential Concentration of Credit Risk (Details) - USD ($) $ in Millions		Dec. 31, 2018		Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	[1]	$ 151,839		$ 143,181
Fair Value, Concentration of Risk, Loans Receivable		$ 11,414		$ 10,843
Current Weighted Average FICO Score on Mortgages With Potential Concentration of Credit Risk		759		756
Residential Mortgage Interest Only Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair Value, Concentration of Risk, Loans Receivable	[2]	$ 492		$ 646
Residential Mortgage Amortizing Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair Value, Concentration of Risk, Loans Receivable	[3]	10,922		10,197
Interest Only Mortgage with MI or with Combined Original LTV less than 80% [Member] | Residential Mortgage Interest Only Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair Value, Concentration of Risk, Loans Receivable	[2]	464		569
Interest Only Mortgage with no MI and with Combined Original LTV greater than 80% [Member] | Residential Mortgage Interest Only Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair Value, Concentration of Risk, Loans Receivable	[2]	28		77
Geographic Distribution, Foreign [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross		1,800		1,400
Residential Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross		$ 38,900		$ 38,600
Percentage of Loans Held for Investment		26.00%		27.00%
Federal National Mortgage Association (FNMA) Insured Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross		$ 459		$ 560
Government Guarantee Percent		1.00%	[4]	1.00%
Mortgage Loans on Real Estate [Member] | Credit Concentration Risk [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unused Commitments to Extend Credit		$ 2,700		$ 3,000
[1]	Includes loans of consolidated VIEs of $153 million and $179 million at December?31, 2018 and December?31, 2017, respectively.
[2]	Comprised of first and/or second liens, primarily with an initial 10 year interest only period.
[3]	Comprised of loans with no MI
[4]	Includes 3,321 loans with a carrying value of $41 million that were modified prior to 2016 and reclassified as TDRs in the fourth quarter of 2016.

Activity in the Allowance for C

Activity in the Allowance for Credit Losses (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015
Components:
Allowance for credit losses		$ 1,684		$ 1,814		$ 1,776
Provision for loan losses		218		397		440
Provision for Other Credit Losses		(10)	[1]	12	[2]	4	[3]
Allowance for Loan and Lease Losses, Write-offs		(453)		(491)		(591)
Loan recoveries		115		124		108
Allowance for Loan and Lease Losses, Adjustments, Other	[4]			(4)
Loans and Leases Receivable, Allowance		1,615		1,735		1,709		$ 1,752
Unfunded commitments reserve		69	[1]	79	[1],[2]	67	[2],[3]	63	[3]
Commercial Portfolio Segment [Member]
Components:
Allowance for credit losses		1,149		1,180		1,191
Provision for loan losses		86		108		329
Provision for Other Credit Losses		(10)	[1]	12	[2]	4	[3]
Allowance for Loan and Lease Losses, Write-offs		(131)		(167)		(287)
Loan recoveries		24		40		35
Allowance for Loan and Lease Losses, Adjustments, Other	[4]			(4)
Loans and Leases Receivable, Allowance		1,080		1,101		1,124		1,047
Unfunded commitments reserve		69	[1]	79	[1],[2]	67	[2],[3]	63	[3]
Consumer Portfolio Segment [Member]
Components:
Allowance for credit losses		535		634		585
Provision for loan losses		132		289		111
Allowance for Loan and Lease Losses, Write-offs		(322)		(324)		(304)
Loan recoveries		91		84		73
Loans and Leases Receivable, Allowance		$ 535		$ 634		$ 585		$ 705
[1]	The unfunded commitments reserve is recorded in Other liabilities in the Consolidated Balance Sheets.
[2]	The unfunded commitments reserve is recorded in Other liabilities in the Consolidated Balance Sheets.
[3]	The unfunded commitments reserve is recorded in Other liabilities in the Consolidated Balance Sheets.
[4]	Related to loans disposed in connection with the sale of PAC . For additional information regarding the sale of PAC , see Note 3

Activity in the ALLL by segment

Activity in the ALLL by segment (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015
Allowance for Loan and Lease Losses [Roll Forward]
Provision for loan losses		$ 218		$ 397		$ 440
Allowance for Loan and Lease Losses, Write-offs		(453)		(491)		(591)
Loan recoveries		115		124		108
Allowance for Loan and Lease Losses, Adjustments, Other	[1]			(4)
Loans and Leases Receivable, Allowance		1,615		1,735		1,709		$ 1,752
Unfunded commitments reserve		69	[2]	79	[2],[3]	67	[3],[4]	63	[4]
Provision for Other Credit Losses		(10)	[2]	12	[3]	4	[4]
Financing Receivable, Allowance for Credit Losses		1,684		1,814		1,776
Commercial Portfolio Segment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Provision for loan losses		86		108		329
Allowance for Loan and Lease Losses, Write-offs		(131)		(167)		(287)
Loan recoveries		24		40		35
Allowance for Loan and Lease Losses, Adjustments, Other	[1]			(4)
Loans and Leases Receivable, Allowance		1,080		1,101		1,124		1,047
Unfunded commitments reserve		69	[2]	79	[2],[3]	67	[3],[4]	63	[4]
Provision for Other Credit Losses		(10)	[2]	12	[3]	4	[4]
Financing Receivable, Allowance for Credit Losses		1,149		1,180		1,191
Consumer Portfolio Segment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Provision for loan losses		132		289		111
Allowance for Loan and Lease Losses, Write-offs		(322)		(324)		(304)
Loan recoveries		91		84		73
Loans and Leases Receivable, Allowance		535		634		585		$ 705
Financing Receivable, Allowance for Credit Losses		$ 535		$ 634		$ 585
[1]	Related to loans disposed in connection with the sale of PAC . For additional information regarding the sale of PAC , see Note 3
[2]	The unfunded commitments reserve is recorded in Other liabilities in the Consolidated Balance Sheets.
[3]	The unfunded commitments reserve is recorded in Other liabilities in the Consolidated Balance Sheets.
[4]	The unfunded commitments reserve is recorded in Other liabilities in the Consolidated Balance Sheets.

Loans Held for Investment portf

Loans Held for Investment portfolio and Related Allowance for Loan and Lease Losses (Detail) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Individually evaluated		$ 2,611	$ 2,821
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment		167	204
Collectively evaluated		149,065	140,164
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment		1,448	1,531
Total evaluated		151,676	142,985
Loans And Leases Receivable Allowance Loans Evaluated For Impairment Excluding Fair Value Loans		1,615	1,735
Loans Receivable, Fair Value Disclosure		163	196
Total	[1]	151,839	143,181
Loans and Leases Receivable, Allowance		1,615	1,735	$ 1,709	$ 1,752
Commercial Portfolio Segment [Member]
Individually evaluated		149	173
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment		13	21
Collectively evaluated		80,791	75,304
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment		1,067	1,080
Total evaluated		80,940	75,477
Loans And Leases Receivable Allowance Loans Evaluated For Impairment Excluding Fair Value Loans		1,080	1,101
Loans Receivable, Fair Value Disclosure		0	0
Total		80,940	75,477
Loans and Leases Receivable, Allowance		1,080	1,101	1,124	1,047
Residential Portfolio Segment [Member]
Total		38,900	38,600
Consumer Portfolio Segment [Member]
Individually evaluated		2,462	2,648
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment		154	183
Collectively evaluated		68,274	64,860
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment		381	451
Total evaluated		70,736	67,508
Loans And Leases Receivable Allowance Loans Evaluated For Impairment Excluding Fair Value Loans		535	634
Loans Receivable, Fair Value Disclosure		163	196
Total		70,899	67,704
Loans and Leases Receivable, Allowance		$ 535	$ 634	$ 585	$ 705
[1]	Includes loans of consolidated VIEs of $153 million and $179 million at December?31, 2018 and December?31, 2017, respectively.

Goodwill and Intangible Assets

Goodwill and Intangible Assets - Additional Information (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement		$ 299,181	$ 285,301
Mortgage Servicing Rights, Fair Value [Member]
Fees and Commissions, Mortgage Banking and Servicing	[1]	437	403	$ 366
Principal Amount Outstanding of Loans Serviced For Third Parties		140,801	136,071
Unpaid Principal Balance of Outstanding Underlying MSRs Purchased		7,000	0
Principal Amount Sold on Loans Serviced for Third Parties		1,100	1,100
Asset-backed Securities, Securitized Loans and Receivables [Member]
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement		146,208	139,920
Commercial Mortgage Servicing Rights [Member]
Fees and Commissions, Mortgage Banking and Servicing	[2]	26	22	1
Principal Amount Outstanding of Loans Serviced		34,539	30,054
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement		6,399	5,760
Servicing Asset at Amortized Cost		66	65
Consumer Portfolio Segment [Member] | Asset-backed Securities, Securitized Loans and Receivables [Member]
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement		139,809	134,160
Pillar Financial [Member]
Fees and Commissions, Mortgage Banking and Servicing	[2]	13	14	$ 1
Principal Amount Outstanding of Loans Serviced For Third Parties		$ 28,140	$ 24,294
[1]	Recognized in Mortgage related income in the Consolidated Statements of Income.
[2]	Recognized in Commercial real estate related income in the Consolidated Statements of Income.

Premises and Equipment (Detail)

Premises and Equipment (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Land		$ 310	$ 321
Buildings and Improvements, Gross		1,059	1,047
Leasehold improvements		758	691
Furniture and equipment		1,429	1,430
Capitalized Computer Software, Gross	[1]	1,890	1,671
Construction in progress		351	488
Property, Plant and Equipment, Gross, Total		5,797	5,648
Less accumulated depreciation and amortization		3,773	3,595
Premises and equipment	[2]	$ 2,024	$ 2,053
Building and Building Improvements | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		1 year	1 year
Building and Building Improvements | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		50 years	40 years
Leasehold Improvements | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		1 year	1 year
Leasehold Improvements | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		30 years	30 years
Furniture and Fixtures | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		1 year	1 year
Furniture and Fixtures | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		20 years	20 years
Software and Software Development Costs [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		1 year	1 year
Software and Software Development Costs [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		5 years	5 years
[1]	Beginning October 1, 2018, the Company reclassified capitalized software and related accumulated amortization previously presented in Other assets to Premises, property, and equipment, net, on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability.
[2]	Beginning October 1, 2018, the Company reclassified software and related accumulated amortization previously presented in Other assets to Premises, property, and equipment, net. Reclassifications have been made to previously reported amounts for comparability.

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Changes in the Carrying Amount of Goodwill by Reportable Segment (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Line Items]
Goodwill	$ 6,331	$ 6,331	$ 6,337
Goodwill, Purchase Accounting Adjustments		1
Goodwill, Written off Related to Sale of Business Unit		(7)
Goodwill, Transfers	0
Consumer [Member]
Goodwill [Line Items]
Goodwill	4,390	4,262	4,262
Goodwill, Purchase Accounting Adjustments		0
Goodwill, Written off Related to Sale of Business Unit		0
Goodwill, Transfers	128
Wholesale [Member]
Goodwill [Line Items]
Goodwill	1,941	2,069	$ 2,075
Goodwill, Purchase Accounting Adjustments		1
Goodwill, Written off Related to Sale of Business Unit		$ (7)
Goodwill, Transfers	$ (128)

Premises and Equipment - Additi

Premises and Equipment - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Operating Leases, Rent Expense, Net	$ 179	$ 201	$ 202
Depreciation, Depletion and Amortization	333	299	290
Amortization Of Deferred Gain On Sale Lease Back Of Premises	6	17	$ 43
Sale Leaseback Transaction, Deferred Gain, Gross	$ 42	$ 49
Lessee, Operating Lease, Term of Contract	20 years

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Changes in the Carrying Amounts of Other Intangible Assets (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Intangible Assets, Net (Excluding Goodwill)		$ 2,062	[1]	$ 1,791	[1]	$ 1,657
Amortization	[2]	(18)		(20)
Origination of Mortgage Servicing Rights (MSRs)		352		411
Servicing Assets at Fair Value, Purchased		89
Due to changes in inputs or assumptions	[3]	90		(22)
Servicing Asset at Fair Value, Other Changes in Fair Value	[4]	(239)		(226)
Servicing Asset at Fair Value, Disposals		3		8
Intangible Assets, Written off Related to Sale of Business Unit	[5]			(1)
Finite-Lived Intangible Assets, Accumulated Amortization	[1]	(34)		(42)
Finite-Lived Intangible Assets, Net		67
Indefinite-lived Intangible Assets (Excluding Goodwill)		12		12
Intangible Assets, Gross (Excluding Goodwill)	[1]	2,096		1,833
Mortgage Servicing Rights, Fair Value [Member]
Amortization	[2]	0		0
Origination of Mortgage Servicing Rights (MSRs)		336		394
Servicing Assets at Fair Value, Purchased		89
Due to changes in inputs or assumptions	[3]	90		(22)
Servicing Asset at Fair Value, Other Changes in Fair Value	[4]	(239)		(226)
Servicing Asset at Fair Value, Disposals		3		8
Intangible Assets, Written off Related to Sale of Business Unit	[5]			0
Servicing Asset at Fair Value, Amount		1,983		1,710		1,572
Other Intangible Assets [Member]
Intangible Assets, Net (Excluding Goodwill)		79		81		$ 85
Amortization	[2]	(18)		(20)
Origination of Mortgage Servicing Rights (MSRs)		16		17
Servicing Assets at Fair Value, Purchased		0
Due to changes in inputs or assumptions	[3]	0		0
Servicing Asset at Fair Value, Other Changes in Fair Value	[4]	0		0
Servicing Asset at Fair Value, Disposals		0		0
Intangible Assets, Written off Related to Sale of Business Unit	[5]			(1)
Finite-Lived Intangible Assets, Gross	[1]	6		32
Finite-Lived Intangible Assets, Accumulated Amortization	[1]	(5)		(28)
Finite-Lived Intangible Assets, Net	[1]	1		4
Commercial Mortgage Servicing Rights [Member]
Finite-Lived Intangible Assets, Gross	[1]	95		79
Finite-Lived Intangible Assets, Accumulated Amortization	[1]	(29)		(14)
Finite-Lived Intangible Assets, Net	[1]	66		65
Fair Value, Measurements, Recurring [Member]
Servicing Asset at Fair Value, Amount		$ 1,983		$ 1,710
[1]	Excludes other intangible assets that are indefinite-lived, carried at fair value, or fully amortized.
[2]	Does not include expense associated with community development investments. See Note 12
[3]	Primarily reflects changes in option adjusted spreads and prepayment speed assumptions, due to changes in interest rates.
[4]	Represents changes due to the collection of expected cash flows, net of accretion due to the passage of time.
[5]	Represents measurement period adjustment on other intangible assets acquired previously in the Pillar

Premises, Property, and Equip_3

Premises, Property, and Equipment Leases (Details) $ in Millions	Dec. 31, 2018USD ($)
Leases [Abstract]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 204
Operating Leases, Future Minimum Payments, Due in Two Years	195
Operating Leases, Future Minimum Payments, Due in Three Years	186
Operating Leases, Future Minimum Payments, Due in Four Years	171
Operating Leases, Future Minimum Payments, Due in Five Years	148
Operating Leases, Future Minimum Payments, Due Thereafter	585
Operating Leases, Future Minimum Payments Due	$ 1,489

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets Intangible Assets Schedule of Future Amortization (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets (Excluding Goodwill)	$ 12	$ 12
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	10
Finite-Lived Intangible Assets, Amortization Expense, Year Two	8
Finite-Lived Intangible Assets, Amortization Expense, Year Three	7
Finite-Lived Intangible Assets, Amortization Expense, Year Four	6
Finite-Lived Intangible Assets, Amortization Expense, Year Five	5
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	31
Finite-Lived Intangible Assets, Net	$ 67

Goodwill and Other Intangible_6

Goodwill and Other Intangible Assets - Summary of the Key Characteristics, Inputs, and Economic Assumptions Used to Estimate the Fair Value of the Company's MSRs (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Commercial Mortgage Servicing Rights [Member]
Servicing Asset at Fair Value, Amount	$ 77	$ 75
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Discount Rate	12.00%	12.00%
Decline in fair value from 10% adverse change	$ 3	$ 3
Decline in fair value from 20% adverse change	$ 6	$ 6
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Prepayment Speed	5.00%	7.00%
Decline in fair value from 10% adverse change	$ 1	$ 1
Decline in fair value from 20% adverse change	$ 2	$ 2
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Weighted Average Life	8 years 1 month 6 days	7 years
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions used to Estimate Fair Value, Float Earnings Rate	1.10%	1.10%
Mortgage Servicing Rights, Fair Value [Member]
Servicing Asset at Fair Value, Amount	$ 1,983	$ 1,710
Discount rate (annual)	2.00%	4.00%
Decline in fair value from 10% adverse change	$ 44	$ 47
Decline in fair value from 20% adverse change	$ 86	$ 90
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Prepayment Speed	13.00%	13.00%
Decline in fair value from 10% adverse change	$ 96	$ 85
Decline in fair value from 20% adverse change	$ 183	$ 160
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Weighted Average Life	5 years 6 months	5 years 4 months 24 days
Weighted-average coupon	4.00%	3.90%

Other Assets (Details)

Other Assets (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Mutual Fund Investments	[1],[2]	$ 79	$ 49
Equity Securities, FV-NI	[1],[2],[3]	16	7
Federal Reserve Bank Stock	[1],[2]	403	403
Federal Home Loan Bank Stock	[1],[2]	227	15
Equity Securities without Readily Determinable Fair Value, Amount	[2],[3]	68	26
Net Investment in Lease		1,940	1,528
Bank Owned Life Insurance		1,627	1,411
Accrued Investment Income Receivable		1,106	880
Receivables from Customers		602	2,201
Defined Benefit Plan, Funded (Unfunded) Status of Plan		484	464
Prepaid Expense		231	319
Other Real Estate	[4]	54	57
Other Assets, Miscellaneous	[5]	432	467
Other Assets	[6],[7]	8,991	9,099
Reclassification of Equity Securities from Nommarketable to Marketable		22
Equity Securities, FV-NI, Gain (Loss)	[8]	(2)
Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Annual Amount		0
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount	[8]	30
Equity Securities, FV-NI, Realized Gain (Loss)		0
Equity Securities [Member]
Unrealized Gain (Loss) on Securities		28
Tax Credit Investments [Member]
Other Assets	[9]	$ 1,722	$ 1,272
[1]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability
[2]	Does not include equity securities held for trading purposes classified as Trading assets and derivative instruments or Trading liabilities and derivative instruments on the Company’s Consolidated Balance Sheets. See Note 5
[3]	During the second quarter of 2018, the Company reclassified $22 million
[4]	Does not include foreclosed real estate related to loans insured by the FHA or guaranteed by the VA . Proceeds due from the FHA and the VA are recorded as a receivable in Other assets in the Consolidated Balance Sheets until the property is conveyed and the funds are received. The receivable related to proceeds due from the FHA and the VA totaled $50 million and $45 million at December 31, 2018 and 2017 , respectively.
[5]	Beginning October 1, 2018, the Company reclassified capitalized software and related accumulated amortization previously presented in Other assets to Premises, property, and equipment, net, on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability.
[6]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities available for sale to Other assets. Reclassifications have been made to previously reported amounts for comparability.
[7]	Beginning October 1, 2018, the Company reclassified software and related accumulated amortization previously presented in Other assets to Premises, property, and equipment, net. Reclassifications have been made to previously reported amounts for comparability.
[8]	Recognized in Other noninterest income in the Company's Consolidated Statements of Income.
[9]	See Note 12

Certain Transfers of Financia_3

Certain Transfers of Financial Assets and Variable Interest Entities - Additional Information (Detail) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
		Dec. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash Flows Between Transferor and Transferee, Receipts on Transferor's Interest in Transferred Financial Assets, Other			$ 2	$ 11	$ 12
Total assets		$ 215,543	215,543	205,962
Total liabilities		191,263	191,263	180,808
Long-term Debt	[1],[2]	15,072	15,072	9,785
Gains on sale of OTTI securities		6	6
Debt Securities, Trading, and Equity Securities, FV-NI	[3]	5,506	5,506	5,093
Amortization of Intangible Assets	[4]		18	20
Amortization			73	75	49
Variable Interest Entity, Not Primary Beneficiary [Member]
Investment Tax Credit			89	90	64
Amortization of Intangible Assets			71	70	46
Variable Interest Entity, Primary Beneficiary [Member]
Long-term Debt		161	161	189
Residential Mortgage [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
Loans and Leases Receivable, Gain (Loss) on Sales, Net			64	213	$ 331
Transferor's Interests in Transferred Financial Assets, Fair Value				22
Total assets				147
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount				22
Commercial and Corporate Loans [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
Loans and Leases Receivable, Gain (Loss) on Sales, Net			35	37
Student Loans [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Loans Receivable, Net		165	165	192
Long-term Debt		$ 161	$ 161	$ 189
Student Loans [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Maximum [Member]
Government Guarantee Percent		98.00%	98.00%	98.00%
Total Return Swap [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
Derivative Asset, Notional Amount		$ 2,000	$ 2,000	$ 1,700
Debt Securities, Trading, and Equity Securities, FV-NI		$ 2,000	$ 2,000	$ 1,700
Death, Disability, Bankruptcy [Member] | Student Loans [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Maximum [Member]
Government Guarantee Percent		100.00%	100.00%
[1]	Includes $289 million and $530 million of long-term debt measured at fair value at December 31, 2018 and 2017
[2]	Includes debt of consolidated VIEs of $161 million and $189 million at December?31, 2018 and December?31, 2017, respectively.
[3]	Includes trading securities pledged as collateral where counterparties have the right to sell or repledge the collateral of $1,442 million and $1,086 million at December?31, 2018 and December?31, 2017, respectively.
[4]	Does not include expense associated with community development investments. See Note 12

Portfolio Balances and Delinque

Portfolio Balances and Delinquency Balances Based on 90 days or more Past Due and Net Charge-Offs Related to Managed Portfolio Loans (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement		$ 299,181	$ 285,301
Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-backed Financing Arrangement		2,476	2,590
Net Credit Losses During Period on Loans Managed or Securitized or Asset-backed Financing Arrangement		343	375
Commercial Portfolio Segment [Member]
Principal Amount Outstanding of Loans Held-in-portfolio		80,940	75,477
Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-backed Financing Arrangement		175	247
Net Credit Losses During Period on Loans Managed or Securitized or Asset-backed Financing Arrangement		107	127
Consumer Portfolio Segment [Member]
Principal Amount Outstanding of Loans Held-in-portfolio		70,899	67,704
Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-backed Financing Arrangement		2,003	1,832
Net Credit Losses During Period on Loans Managed or Securitized or Asset-backed Financing Arrangement		231	240
Loans and Finance Receivables [Member]
Principal Amount Outstanding of Loans Held-in-portfolio		151,839	143,181
Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-backed Financing Arrangement		2,178	2,079
Net Credit Losses During Period on Loans Managed or Securitized or Asset-backed Financing Arrangement		338	367
Asset-backed Securities, Securitized Loans and Receivables [Member]
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement		146,208	139,920
Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-backed Financing Arrangement		146	171
Net Credit Losses During Period on Loans Managed or Securitized or Asset-backed Financing Arrangement		5	8
Loans [Member]
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement	[1]	1,134	2,200
Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-backed Financing Arrangement	[1]	152	340
Net Credit Losses During Period on Loans Managed or Securitized or Asset-backed Financing Arrangement		0	0
Commercial Portfolio Segment [Member] | Asset-backed Securities, Securitized Loans and Receivables [Member]
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement	[2]	6,399	5,760
Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-backed Financing Arrangement	[2]	0	0
Net Credit Losses During Period on Loans Managed or Securitized or Asset-backed Financing Arrangement		0	0
Consumer Portfolio Segment [Member] | Asset-backed Securities, Securitized Loans and Receivables [Member]
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement		139,809	134,160
Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-backed Financing Arrangement		146	171
Net Credit Losses During Period on Loans Managed or Securitized or Asset-backed Financing Arrangement	[3]	$ 5	$ 8
[1]	Comprised of unsecuritized loans the Company originated and sold to private investors with servicing rights retained. Net charge-offs on these loans are not presented in the table as the data is not reported to the Company by the private investors that own these related loans.
[2]	Comprised of commercial mortgages sold through Fannie Mae , Freddie Mac , and Ginnie Mae
[3]	Amounts associated with $387 million and $602 million of managed securitized loans at December 31, 2018 and 2017 , respectively. Net charge-off data is not reported to the Company for the remaining balance of $139.4 billion and $133.6 billion of managed securitized loans at December 31, 2018 and 2017

Certain Transfers of Financia_4

Certain Transfers of Financial Assets and Variable Interest Entities Portfolio Balances and Delinquency Balances Based on 90 days or more Past Due and Net Charge-Offs Related to Managed Portfolio Loans (Additional Information) (Details) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Statement [Line Items]
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement		$ 299,181	$ 285,301
Asset-backed Securities, Securitized Loans and Receivables [Member]
Statement [Line Items]
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement		146,208	139,920
Consumer Portfolio Segment [Member] | Asset-backed Securities, Securitized Loans and Receivables [Member]
Statement [Line Items]
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement		139,809	134,160
Consumer Portfolio Segment [Member] | Asset-backed Securities, Securitized Loans and Receivables [Member] | STI Sponsored Securitizations [Member]
Statement [Line Items]
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement		387	602
Consumer Portfolio Segment [Member] | Asset-backed Securities, Securitized Loans and Receivables [Member] | Managed Securitized Loans [Member]
Statement [Line Items]
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement		139,400	133,600
Commercial Portfolio Segment [Member] | Asset-backed Securities, Securitized Loans and Receivables [Member]
Statement [Line Items]
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement	[1]	$ 6,399	$ 5,760
[1]	Comprised of commercial mortgages sold through Fannie Mae , Freddie Mac , and Ginnie Mae

Certain Transfers of Financia_5

Certain Transfers of Financial Assets and Variable Interest Entities Tax Credit Variable Interest Entities (Details) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Other Assets	[1],[2]	$ 8,991	$ 9,099
Community Development Investments [Member]
Other Assets	[3]	1,636	1,272
Community Development Investments [Member] | Limited Partner [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	[4]	2,207	1,905
Renewable Energy Program [Member]
Other Assets		86	0
Renewable Energy Program [Member] | Limited Partner [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	[4]	$ 138	$ 0
[1]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities available for sale to Other assets. Reclassifications have been made to previously reported amounts for comparability.
[2]	Beginning October 1, 2018, the Company reclassified software and related accumulated amortization previously presented in Other assets to Premises, property, and equipment, net. Reclassifications have been made to previously reported amounts for comparability.
[3]	At December 31, 2018 and 2017 , the carrying value of community development investments excludes $68 million and $59 million
[4]	At December 31, 2018 and 2017 , the Company's maximum exposure to loss related to community development investments includes $422 million and $354 million of loans and $639 million and $627 million of unfunded equity commitments, respectively. At December 31, 2018 , the Company's maximum exposure to loss related to renewable energy partnerships includes $52 million

Certain Transfers of Financia_6

Certain Transfers of Financial Assets and Variable Interest Entities Tax Credit Variable Interest Entities (Additional Information) (Details) - Variable Interest Entity, Not Primary Beneficiary [Member] - Limited Partner [Member] - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Community Development Investments [Member]
Portion of Other Assets Not Qualified for Tax Credits	$ (68)	$ (59)
Loans Issued by the Company to the Limited Partnerships	422	354
Unfunded Equity Commitment	639	$ 627
Renewable Energy Program [Member]
Unfunded Equity Commitment	$ 52

Certain Transfers of Financia_7

Certain Transfers of Financial Assets and Variable Interest Entities Community Development Tax Credits and Amortization (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Affordable Housing Tax Credits and Other Tax Benefits, Amount		$ 121	$ 108	$ 92
Amortization Method Qualified Affordable Housing Project Investments, Amortization		127	109	87
Amortization of Intangible Assets	[1]	18	20
Variable Interest Entity, Not Primary Beneficiary [Member]
Investment Tax Credit		89	90	64
Amortization of Intangible Assets		$ 71	$ 70	$ 46
[1]	Does not include expense associated with community development investments. See Note 12

Borrowings and Contractual Co_4

Borrowings and Contractual Commitments Short-Term Borrowings (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Short-term Debt [Line Items]
Federal Funds Purchased	$ 2,141	$ 2,561
Securities Sold under Agreements to Repurchase	1,774	1,503
Other Short-term Borrowings	4,857	717
Short-term Debt	$ 8,772	$ 4,781
Short-term Debt, Weighted Average Interest Rate, at Point in Time	2.46%	1.30%
Federal Funds Purchased [Member]
Short-term Debt [Line Items]
Short-term Debt, Weighted Average Interest Rate, at Point in Time	2.40%	1.33%
Securities Sold under Agreements to Repurchase [Member]
Short-term Debt [Line Items]
Short-term Debt, Weighted Average Interest Rate, at Point in Time	2.58%	1.39%
Other Short-Term Borrowings [Member]
Short-term Debt [Line Items]
Short-term Debt, Weighted Average Interest Rate, at Point in Time	2.44%	1.00%
Federal Home Loan Bank Advances [Member]
Short-term Debt [Line Items]
Other Short-term Borrowings	$ 4,000	$ 0
Short-term Debt, Weighted Average Interest Rate, at Point in Time	2.53%
Dealer Collateral [Member]
Short-term Debt [Line Items]
Other Short-term Borrowings	$ 503	$ 367
Short-term Debt, Weighted Average Interest Rate, at Point in Time	2.40%	1.33%
Master Notes [Member]
Short-term Debt [Line Items]
Other Short-term Borrowings	$ 354	$ 350
Short-term Debt, Weighted Average Interest Rate, at Point in Time	1.40%	0.66%

Borrowings and Contractual Co_5

Borrowings and Contractual Commitments Long-term debt (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Long-term Debt	[1],[2]	$ 15,072	$ 9,785
Percent of Subsidiary Debt held by Bank		82.00%	77.00%
Long-term Debt, Fair Value		$ 289	$ 530
debt denominated in foreign currency [Member]
Debt Instrument [Line Items]
Long-term Debt		0	0
Parent Company [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross		4,545	4,474
Debt Issuance Costs, Net		9	8
Long-term Debt		4,536	4,466
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months		792
Long-term Debt, Maturities, Repayments of Principal in Year Two		0
Long-term Debt, Maturities, Repayments of Principal in Year Three		1,039
Long-term Debt, Maturities, Repayments of Principal in Year Four		984
Long-term Debt, Maturities, Repayments of Principal in Year Five		12
Long-term Debt, Maturities, Repayments of Principal after Year Five		1,718
Parent Company [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Amount		3,467	3,353
Long-term Debt, Percentage Bearing Variable Interest, Amount		$ 51	51
Parent Company [Member] | Senior Notes [Member] | Fixed Interest Rate Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date Range, Start		May 1, 2019
Debt Instrument, Maturity Date Range, End		Jan. 15, 2028
Parent Company [Member] | Senior Notes [Member] | Floating Rate Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date Range, Start		Aug. 1, 2019
Debt Instrument, Maturity Date Range, End		Aug. 1, 2019
Parent Company [Member] | Subordinated Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Amount		$ 200	200
Parent Company [Member] | Subordinated Debt [Member] | Fixed Interest Rate Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date Range, Start		Feb. 15, 2026
Debt Instrument, Maturity Date Range, End		Feb. 15, 2026
Parent Company [Member] | Junior Subordinated Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Amount		$ 627	628
Parent Company [Member] | Junior Subordinated Debt [Member] | Floating Rate Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date Range, Start		Apr. 1, 2027
Debt Instrument, Maturity Date Range, End		Mar. 15, 2028
Parent Company [Member] | Structured Finance [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date Range, Start		Apr. 29, 2019
Debt Instrument, Maturity Date Range, End		Nov. 2, 2026
Long-term Debt	[3]	$ 200	242
Parent Company [Member] | Minimum [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		2.50%
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate		2.69%
Parent Company [Member] | Minimum [Member] | Subordinated Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		6.00%
Parent Company [Member] | Minimum [Member] | Junior Subordinated Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate		3.29%
Parent Company [Member] | Maximum [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		6.00%
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate		2.69%
Parent Company [Member] | Maximum [Member] | Subordinated Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		6.00%
Parent Company [Member] | Maximum [Member] | Junior Subordinated Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate		3.44%
Subsidiaries [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	[4]	$ 10,551	5,327
Debt Issuance Costs, Net		15	8
Long-term Debt		10,536	5,319
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months		1,026
Long-term Debt, Maturities, Repayments of Principal in Year Two		1,496
Long-term Debt, Maturities, Repayments of Principal in Year Three		1,652
Long-term Debt, Maturities, Repayments of Principal in Year Four		1,800
Long-term Debt, Maturities, Repayments of Principal in Year Five		1,095
Long-term Debt, Maturities, Repayments of Principal after Year Five		3,482
Subsidiaries [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Amount	[4],[5]	6,238	3,609
Long-term Debt, Percentage Bearing Variable Interest, Amount	[4]	$ 1,085	512
Subsidiaries [Member] | Senior Notes [Member] | Fixed-to-Floating Rate Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date Range, Start		Jan. 29, 2021
Debt Instrument, Maturity Date Range, End		Aug. 2, 2024
Long-term Debt	[4]	$ 2,364	0
Subsidiaries [Member] | Senior Notes [Member] | Fixed Interest Rate Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date Range, Start		Jan. 16, 2019
Debt Instrument, Maturity Date Range, End		Oct. 31, 2058
Subsidiaries [Member] | Senior Notes [Member] | Floating Rate Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date Range, Start		Jan. 31, 2020
Debt Instrument, Maturity Date Range, End		Dec. 19, 2043
Subsidiaries [Member] | Subordinated Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Amount	[4]	$ 864	$ 1,206
Subsidiaries [Member] | Subordinated Debt [Member] | Fixed Interest Rate Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date Range, Start		Apr. 1, 2020
Debt Instrument, Maturity Date Range, End		May 15, 2026
Subsidiaries [Member] | Minimum [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		0.69%
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate		1.04%
Subsidiaries [Member] | Minimum [Member] | Senior Notes [Member] | Fixed-to-Floating Rate Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.59%
Subsidiaries [Member] | Minimum [Member] | Subordinated Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		3.30%
Subsidiaries [Member] | Maximum [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		9.55%
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate		3.15%
Subsidiaries [Member] | Maximum [Member] | Senior Notes [Member] | Fixed-to-Floating Rate Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.69%
Subsidiaries [Member] | Maximum [Member] | Subordinated Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		5.40%
[1]	Includes $289 million and $530 million of long-term debt measured at fair value at December 31, 2018 and 2017
[2]	Includes debt of consolidated VIEs of $161 million and $189 million at December?31, 2018 and December?31, 2017, respectively.
[3]	Consists of notes with various terms that include fixed or floating interest, or returns that are linked to an equity index.
[4]	82% and 77% of total subsidiary debt was issued by the Bank as of December 31, 2018 and 2017
[5]	Includes leases and other obligations that do not have a stated interest rate.

Borrowings and Contractual Co_6

Borrowings and Contractual Commitments Long-term debt (Additional Information) (Details) - USD ($) $ in Millions	3 Months Ended				12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Proceeds from Issuance of Senior Long-term Debt					$ 4,800
Maturities of Senior Debt					750
Maturities of Subordinated Debt					314
Tier two risk based capital [Member]
Debt Instrument [Line Items]
Long-term Debt Risk Based Capital Treatment	$ 1,500				1,500	$ 1,600
Finance Leases [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Senior Long-term Debt					530
Federal Home Loan Bank Advances [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Senior Long-term Debt					$ 1,000
Senior Notes [Member] | 7 Years [Member] | Parent Company [Member] | Fixed Interest Rate Debt [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Senior Long-term Debt			$ 850
Senior Notes [Member] | 7 Years [Member] | Subsidiaries [Member] | Fixed Interest Rate Debt [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Senior Long-term Debt	500
Senior Notes [Member] | 5 Years [Member] | Subsidiaries [Member] | Fixed Interest Rate Debt [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Senior Long-term Debt				$ 500
Senior Notes [Member] | 3 Years [Member] | Subsidiaries [Member] | Floating Rate Debt [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Senior Long-term Debt	300
Senior Notes [Member] | 3 Years [Member] | Subsidiaries [Member] | Fixed-to-Floating Rate Debt [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Senior Long-term Debt	$ 600			$ 750
Senior Notes [Member] | 4 Years [Member] | Subsidiaries [Member] | Floating Rate Debt [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Senior Long-term Debt		$ 300
Senior Notes [Member] | 4 Years [Member] | Subsidiaries [Member] | Fixed-to-Floating Rate Debt [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Senior Long-term Debt		500
Senior Notes [Member] | 6 Years [Member] | Subsidiaries [Member] | Fixed-to-Floating Rate Debt [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Senior Long-term Debt		$ 500

Borrowings and Contractual Co_7

Borrowings and Contractual Commitments Contractual Commitments (Details) $ in Millions	Dec. 31, 2018USD ($)
Long-term Purchase Commitment [Line Items]
Other Commitment, Due in Next Twelve Months	$ 26,122
Other Commitment, Due in Second Year	8,670
Other Commitment, Due in Third Year	11,495
Other Commitment, Due in Fourth Year	14,678
Other Commitment, Due in Fifth Year	22,421
Other Commitment, Due after Fifth Year	12,538
Other Commitment	95,924
Purchase Obligation, Due in Next Twelve Months	249	[1]
Purchase Obligation, Due in Second Year	234	[1]
Purchase Obligation, Due in Third Year	63	[1]
Purchase Obligation, Due in Fourth Year	64	[1]
Purchase Obligation, Due in Fifth Year	58	[1]
Purchase Obligation, Due after Fifth Year	244	[1]
Purchase Obligation	912	[1]
Qualified Affordable Housing Project Investments, Commitment	702	[2]
consumer and other time [Member]
Long-term Purchase Commitment [Line Items]
Time Deposit Maturities, Next Twelve Months	7,781	[3],[4]
Time Deposit Maturities, Year Two	3,262	[3],[4]
Time Deposit Maturities, Year Three	758	[3],[4]
Time Deposit Maturities, Year Four	918	[3],[4]
Time Deposit Maturities, Year Five	363	[3],[4]
Time Deposit Maturities, after Year Five	2,273	[3],[4]
Time Deposits	15,355	[3],[4]
Brokered Time Deposits [Member]
Long-term Purchase Commitment [Line Items]
Time Deposit Maturities, Next Twelve Months	168	[3]
Time Deposit Maturities, Year Two	238	[3]
Time Deposit Maturities, Year Three	241	[3]
Time Deposit Maturities, Year Four	194	[3]
Time Deposit Maturities, Year Five	152	[3]
Time Deposit Maturities, after Year Five	52	[3]
Time Deposits	1,045	[3]
Next Twelve Months [Member]
Long-term Purchase Commitment [Line Items]
Qualified Affordable Housing Project Investments, Commitment	702	[2]
Year Two [Member]
Long-term Purchase Commitment [Line Items]
Qualified Affordable Housing Project Investments, Commitment	0	[2]
Year Three [Member]
Long-term Purchase Commitment [Line Items]
Qualified Affordable Housing Project Investments, Commitment	0	[2]
Year Four [Member]
Long-term Purchase Commitment [Line Items]
Qualified Affordable Housing Project Investments, Commitment	0	[2]
Year Five [Member]
Long-term Purchase Commitment [Line Items]
Qualified Affordable Housing Project Investments, Commitment	0	[2]
After Year Five [Member]
Long-term Purchase Commitment [Line Items]
Qualified Affordable Housing Project Investments, Commitment	$ 0	[2]
[1]	For legally binding purchase obligations of $5 million or more, amounts include either termination fees under the associated contracts when early termination provisions exist, or the total potential obligation over the full contractual term for noncancelable purchase obligations. Payments made towards the purchase of goods or services under these contracts totaled $499 million , $395 million , and $236 million in 2018, 2017, and 2016
[2]	Commitments to fund investments in affordable housing and other partnerships do not have defined funding dates as certain criteria must be met before the Company is obligated to fund. Accordingly, these commitments are considered to be due on demand for presentation purposes. See Note 12
[3]	Amounts do not include interest
[4]	The aggregate amount of time deposit accounts in denominations of $250,000 or more was $4.5 billion and $3.2 billion at December 31, 2018 and 2017

Borrowings and Contractual Co_8

Borrowings and Contractual Commitments Contractual Commitments (Additional Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Long-term Purchase Commitment [Line Items]
Minimum Termination Fee for Contractual Commitments	$ 5
Amount paid during period related to purchase obligations	499	$ 395	$ 236
time deposits $250,000 or more	$ 4,500	$ 3,200

Net Income per common share - A

Net Income per common share - Additonal Information (Details) shares in Millions	12 Months Ended
	Dec. 31, 2016shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1

Reconciliation of Net Income to

Reconciliation of Net Income to Net Income Available to Common Shareholders (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Net Income (Loss) Attributable to Parent		$ 2,775	$ 2,273	[1],[2]	$ 1,878	[3],[4]
Dividends, Preferred Stock, Cash	[5]	(107)	(94)		(66)
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic		0	0		1
Net Income (Loss) Available to Common Stockholders, Basic		$ 2,668	$ 2,179		$ 1,811
Weighted Average Number of Shares Outstanding, Basic		460,922	481,339		498,638
Weighted Average Number of Shares Outstanding, Diluted		464,961	486,954		503,466
Earnings Per Share, Diluted		$ 5.74	$ 4.47		$ 3.60
Earnings Per Share, Basic		$ 5.79	$ 4.53		$ 3.63
Restricted Stock Units (RSUs) [Member]
Dilutive securities		2,900	3,000		2,900
Warrants, options, and restricted stock [Member]
Dilutive securities		1,200	2,700		2,000
[1]	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.
[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]	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]	For the year ended December 31, 2018 , dividends were $4,056 per share for both Series A and B Preferred Stock, $1,469 per share for Series E Preferred Stock, $5,625 per share for Series F Preferred Stock, $5,050 per share for Series G Preferred Stock, and $5,566 per share for Series H Preferred Stock. For the year ended December 31, 2017 , dividends were $4,056 per share for both Series A and B Preferred Stock, $5,875 per share for Series E Preferred Stock, $5,625 per share for Series F Preferred Stock, $3,128 per share for Series G Preferred Stock, and $669 per share for Series H Preferred Stock. For the year ended December 31, 2016 , dividends were $4,067 per share for both Series A and B Preferred Stock, $5,875 per share for Series E Preferred Stock, and $5,625

Capital - Additional Informatio

Capital - Additional Information (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		6 Months Ended	9 Months Ended	12 Months Ended
		Jun. 30, 2018	Sep. 30, 2018	Dec. 31, 2018		Dec. 31, 2017	Dec. 31, 2016
Schedule of Capitalization, Equity [Line Items]
Common Stock, Dividends, Per Share, Cash Paid		$ 0.40	$ 0.50	$ 1.80		$ 1.32	$ 1
Dividends, Common Stock, Cash				$ 826		$ 634	$ 498
Dividends, Preferred Stock, Cash	[1]			107		94	$ 66
Cash Reserve Deposit Required and Made				1,300		$ 1,200
Common Stock [Member]
Schedule of Capitalization, Equity [Line Items]
Stock Repurchased During Period, Value		$ 660		$ 1,250
Stock Repurchased During Period, Shares				18.9
Stock Repurchase Program, Remaining Authorized Repurchase Amount				$ 750
Series A Preferred Stock [Member]
Schedule of Capitalization, Equity [Line Items]
Preferred Stock, Dividends, Per Share, Cash Paid				$ 4,056		$ 4,056	$ 4,067
Series B Preferred Stock [Member]
Schedule of Capitalization, Equity [Line Items]
Preferred Stock, Dividends, Per Share, Cash Paid				4,056		4,056	4,067
Series E Preferred Stock [Member]
Schedule of Capitalization, Equity [Line Items]
Preferred Stock, Dividends, Per Share, Cash Paid				1,469	[2]	5,875	5,875
Series F Preferred Stock [Member]
Schedule of Capitalization, Equity [Line Items]
Preferred Stock, Dividends, Per Share, Cash Paid				5,625		5,625	5,625
Series G Preferred Stock [Member]
Schedule of Capitalization, Equity [Line Items]
Preferred Stock, Dividends, Per Share, Cash Paid				5,050		3,128	0
Series H Preferred Stock [Member]
Schedule of Capitalization, Equity [Line Items]
Preferred Stock, Dividends, Per Share, Cash Paid				$ 5,566		$ 669	$ 0
Parent Company [Member]
Schedule of Capitalization, Equity [Line Items]
Retained Earnings, Unappropriated				$ 2,200		$ 2,500
Retained Earnings [Member]
Schedule of Capitalization, Equity [Line Items]
Dividends, Common Stock, Cash				826		634	$ 498
Dividends, Preferred Stock, Cash	[1]			$ 107		$ 94	$ 66
[1]	For the year ended December 31, 2018 , dividends were $4,056 per share for both Series A and B Preferred Stock, $1,469 per share for Series E Preferred Stock, $5,625 per share for Series F Preferred Stock, $5,050 per share for Series G Preferred Stock, and $5,566 per share for Series H Preferred Stock. For the year ended December 31, 2017 , dividends were $4,056 per share for both Series A and B Preferred Stock, $5,875 per share for Series E Preferred Stock, $5,625 per share for Series F Preferred Stock, $3,128 per share for Series G Preferred Stock, and $669 per share for Series H Preferred Stock. For the year ended December 31, 2016 , dividends were $4,067 per share for both Series A and B Preferred Stock, $5,875 per share for Series E Preferred Stock, and $5,625
[2]	All 4,500

Capital Ratios (Detail)

Capital Ratios (Detail) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Common Equity Tier One Capital	$ 17,258	$ 17,141
Tier 1 capital	19,306	19,622
Total capital	$ 22,517	$ 23,028
Common Equity Tier One Capital Ratio	9.21%	9.74%
Tier 1 capital	10.30%	11.15%
Total capital	12.02%	13.09%
Tier One Leverage Capital to Average Assets	9.26%	9.80%
Sun Trust Bank [Member]
Common Equity Tier One Capital	$ 20,137	$ 19,474
Tier 1 capital	20,160	19,496
Total capital	$ 22,564	$ 22,132
Common Equity Tier One Capital Ratio	11.01%	11.29%
Tier 1 capital	11.02%	11.31%
Total capital	12.33%	12.83%
Tier One Leverage Capital to Average Assets	9.95%	9.97%
Minimum [Member]
Common Equity Tier One Capital Ratio	4.50%
Tier 1 capital	6.00%
Total capital	8.00%
Tier One Leverage Capital to Average Assets	4.00%
Capital Required for Capital Adequacy to Risk Weighted Assets	2.50%

Capital Preferred Stock (Detail

Capital Preferred Stock (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018		Dec. 31, 2017	Dec. 31, 2016
Class of Stock [Line Items]
Preferred Stock, Value, Outstanding	$ 2,025		$ 2,475	$ 1,225
Series A Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Value, Outstanding	172		172	172
Series B Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Value, Outstanding	103		103	103
Series E Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Value, Outstanding	$ 0	[1]	450	450
Stock Redeemed or Called During Period, Shares	4,500
Series F Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Value, Outstanding	$ 500		500	500
Series G Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Value, Outstanding	750		750	0
Series H Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Value, Outstanding	$ 500		$ 500	$ 0
[1]	All 4,500

Capital Preferred Stock (Additi

Capital Preferred Stock (Additional Information) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Nov. 30, 2017	May 31, 2017	Nov. 30, 2014	Dec. 31, 2011	Sep. 22, 2011	Dec. 31, 2008	Sep. 30, 2006
Class of Stock [Line Items]
Preferred Stock, Shares Authorized	50,000,000	50,000,000
Preferred Stock, Shares Outstanding	20,000	25,000
Payments for Repurchase of Warrants	$ 0	$ 0	$ 24,000,000
Stock Warrants Expired	7,445
Series A Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Authorized										5,000
Preferred Stock, Shares Issued										5,000
Preferred Stock, Shares Outstanding	1,725
Preferred Stock, No Par Value										$ 0
Preferred Stock, Liquidation Preference, Value										$ 100,000
Declared And Accrued Preferred Stock Dividend Basis Spread on Variable Rate	0.53%
Declared And Accrued Preferred Stock Dividend Fixed Rate	4.00%
Preferred Stock, Redemption Price Per Share										$ 100,000
Series B Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Authorized							5,010
Preferred Stock, Shares Issued							1,025
Preferred Stock, Shares Outstanding	1,025
Preferred Stock, No Par Value							$ 0
Preferred Stock, Liquidation Preference, Value							$ 100,000
Declared And Accrued Preferred Stock Dividend Basis Spread on Variable Rate	0.645%
Declared And Accrued Preferred Stock Dividend Fixed Rate	4.00%
Preferred Stock, Redemption Price Per Share							$ 100,000
Series C Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Issued									35,000
Series D Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Issued									13,500
Series F Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Authorized						5,000
Preferred Stock, Shares Issued						5,000
Preferred Stock, Shares Outstanding	5,000
Preferred Stock, No Par Value						$ 0
Preferred Stock, Liquidation Preference, Value						$ 100,000
Declared And Accrued Preferred Stock Dividend Basis Spread on Variable Rate	3.86%
Declared And Accrued Preferred Stock Dividend Fixed Rate	5.625%
Preferred Stock, Redemption Price Per Share						$ 100,000
Series G Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Authorized					7,500
Preferred Stock, Shares Issued					7,500
Preferred Stock, Shares Outstanding	7,500
Preferred Stock, No Par Value					$ 0
Preferred Stock, Liquidation Preference, Value					$ 100,000
Declared And Accrued Preferred Stock Dividend Basis Spread on Variable Rate	3.102%
Declared And Accrued Preferred Stock Dividend Fixed Rate	5.05%
Preferred Stock, Redemption Price Per Share					$ 100,000
Series H Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Authorized				5,000
Preferred Stock, Shares Issued				5,000
Preferred Stock, Shares Outstanding	5,000
Preferred Stock, No Par Value				$ 0
Preferred Stock, Liquidation Preference, Value				$ 100,000
Declared And Accrued Preferred Stock Dividend Basis Spread on Variable Rate	2.786%
Declared And Accrued Preferred Stock Dividend Fixed Rate	5.125%
Preferred Stock, Redemption Price Per Share				$ 100,000
Warrant [Member]
Class of Stock [Line Items]
Class of Warrant or Right, Outstanding									17,900,000
Series A [Member]
Class of Stock [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights								4,000,000	6,000,000
Class of Warrant or Right, Exercise Price of Warrants or Rights								$ 11,000,000	$ 33.70
warrants purchased		1,100,000
Series B [Member]
Class of Stock [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights									11,900,000
Class of Warrant or Right, Exercise Price of Warrants or Rights									$ 44.15
warrants purchased		5,400,000
Parent Company [Member]
Class of Stock [Line Items]
Payments for Repurchase of Warrants	$ 0	$ 0	$ 24,000,000
Common Stock [Member]
Class of Stock [Line Items]
Stock Issued During Period, Shares, Other	3,000,000

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Taxes Other Information [Line Items]
Income Tax Expense (Benefit)	$ 548	$ 532	$ 805
Effective Income Tax Rate Reconciliation, Percent	16.50%	19.00%	30.00%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	35.00%	35.00%
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 113
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	22	$ 17
Unrecognized Tax Benefits, Income Tax Penalties Accrued	5	10
Adjustment to Deferred Taxes Remeasurement Benefit Related to 2017 Tax Act	55	303
Deferred Tax Assets, Valuation Allowance	85	$ 143
Decrease in Unrecognized Tax Benefits is Reasonably Possible	$ 50

Income Taxes Components of Inco

Income Taxes Components of Income Tax Provision (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Components of income tax provision [Line Items]
Current Federal Tax Expense (Benefit)	$ 562	$ 129	$ 667
Current State and Local Tax Expense (Benefit)	73	59	27
Current Income Tax Expense (Benefit)	635	188	694
Deferred Federal Income Tax Expense (Benefit)	(122)	275	59
Deferred State and Local Income Tax Expense (Benefit)	35	69	52
Deferred Income Tax Expense (Benefit)	(87)	344	111
Income Tax Expense (Benefit)	$ 548	$ 532	$ 805

Income Taxes Income Tax Rate Re

Income Taxes Income Tax Rate Reconciliation (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Rate Reconciliation [Line Items]
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount		$ 698	$ 982	$ 939
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%	35.00%	35.00%
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount		$ 85	$ 92	$ 59
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent		2.60%	3.30%	2.20%
Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount		$ (67)	$ (90)	$ (86)
Effective Income Tax Rate Reconciliation, Tax Exempt Income, Percent		(2.00%)	(3.20%)	(3.20%)
Effective Income Tax Rate Reconciliation, Tax Credit, Amount	[1]	$ (106)	$ (117)	$ (86)
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	[1]	(3.20%)	(4.20%)	(3.20%)
Effective Income Tax Rate Reconciliation, Deferred Taxes Remeasurement, Amount		$ (55)	$ (303)	$ 0
Effective Income Tax Rate Reconciliation, Deferred Taxes Remeasurement, Percent		(1.70%)	(10.80%)	0.00%
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	[2]	$ (7)	$ (32)	$ (21)
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent	[2]	(0.20%)	(1.10%)	(0.80%)
Income Tax Expense (Benefit)		$ 548	$ 532	$ 805
Effective Income Tax Rate Reconciliation, Percent		16.50%	19.00%	30.00%
Investments [Member]
Income Tax Rate Reconciliation [Line Items]
Effective Income Tax Rate Reconciliation, Tax Credit, Amount	[1]	$ (84)	$ (34)	$ (1)
Adjustments for New Accounting Principle, Early Adoption [Member]
Income Tax Rate Reconciliation [Line Items]
Effective Income Tax Rate Reconciliation, Deferred Taxes Remeasurement, Amount	[2]	$ 22	$ 25	$ 15
[1]	Excludes income tax benefits of $84 million , $34 million , and $1 million for the years ended December 31, 2018, 2017, and 2016
[2]	Includes excess tax benefits of $22 million , $25 million , and $15 million for the years ended December 31, 2018, 2017, and 2016 , respectively, related to the Company's adoption of ASU

Income Taxes Deferred Tax Asset

Income Taxes Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Deferred Tax Assets and Liabilities [Line Items]
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Provision for Loan Losses	$ 376	$ 412
Deferred Tax Assets, Other Comprehensive Loss	438	302
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	111	227
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities	145	180
Deferred Tax Assets, Other	21	17
Deferred Tax Assets, Gross	1,091	1,138
Deferred Tax Assets, Valuation Allowance	(85)	(143)
Deferred Tax Assets, Net	1,006	995
Deferred Tax Liabilities, Leasing Arrangements	475	459
Deferred Tax Liabilities, Servicing Rights	270	290
Deferred Tax Liabilities, Employee Compensation and Benefits	140	210
Deferred Tax Liabilities, Tax Deferred Income	29	193
Deferred Tax Liabilities, Goodwill and Intangible Assets	156	155
Deferred Tax Liabilities, Property, Plant and Equipment	149	111
Deferred Tax Liabilities Loans	96	104
Deferred Tax Liabilities, Other	38	41
Deferred Tax Liabilities, Gross	1,353	1,563
Deferred Tax Liabilities, Net	$ (347)	$ (568)

Income Taxes Changes in Unrecog

Income Taxes Changes in Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Changes in Unrecognized Tax Benefits [Line Items]
Unrecognized Tax Benefits	$ 145	$ 141	$ 111
Federal and State [Member]
Changes in Unrecognized Tax Benefits [Line Items]
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	2	22
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	(6)	(5)
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions	20	13
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	(2)	0
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	$ (10)	$ 0

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail) - USD ($) shares in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Apr. 24, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant		14			17
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options		$ 131	$ 75
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition		2 years
Performance Stock Units, Grants in Period		1	1	2
Performance Stock Unit, Unrecognized Compensation Expense		$ 10
Deferred losses related to NCF Retirement Plan settlement	[1]	$ 60	$ 0	$ 0
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year		7.25%
Defined Benefit Plan, Year Health Care Cost Trend Rate Reaches Ultimate Trend Rate		7 years
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate		4.50%
Defined Benefit Plan, Effect of 25 Basis Point Change in Expected Long-Term Return on Plan Assets		$ 8
Defined Benefit Plan, Effect of 25 Basis Point Change in the Discount Rate		$ 1
Defined Contribution Plan, Employer Matching Contribution, Percent of Match		6.00%	6.00%	6.00%
Defined Contribution Plan, Cost		$ 112	$ 130	$ 105
Pension Plan [Member]
Deferred losses related to NCF Retirement Plan settlement		$ (60)	$ 0	$ 0
Long-Duration Contracts, Assumptions by Product and Guarantee, Discount Rate		5.25%	5.90%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets		5.90%	6.66%	6.68%
Other Postretirement Benefits Plan [Member]
Deferred losses related to NCF Retirement Plan settlement		$ 0	$ 0	$ 0
Long-Duration Contracts, Assumptions by Product and Guarantee, Discount Rate		3.27%	3.10%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets		3.10%	3.12%	3.13%
Long-term [Member]
Deferred Compensation Arrangement with Individual, Compensation Expense		$ 235	$ 319	$ 291
Short-term [Member]
Deferred Compensation Arrangement with Individual, Compensation Expense		$ 466	$ 476	$ 469
[1]	Related to the Company's NCF Retirement Plan settlement in the fourth quarter of 2018. See Note 17

Summary of Stock Option and Res

Summary of Stock Option and Restricted Stock Activity (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Performance Stock Units, Grants in Period	1,000,000	1,000,000	2,000,000
Stock Options Shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	884,601	1,659,305
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	(774,704)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period	0
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options	884,601
Stock Options Price Range
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$ 22	$ 9.06
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	32	64.58
Share Based Compensation Shares Authorized Under Stock Option Plans, Grants in Period Exercise Price Range Lower Range Limit	0
Share Based Compensation Shares Authorized Under Stock Option Plans, Grants in Period Exercise Price Range Upper Range Limit	0
Share Based Compensation Shares Authorized Under Stock Option Plans, Exercised in Period Exercise Price Range Lower Range Limit	9
Share Based Compensation Shares Authorized Under Stock Option Plans, Exercised in Period Exercise Price Range Upper Range Limit	65
Share Based Compensation Shares Authorized Under Stock Option Plans, Forfeitures and Expirations in Period Exercise Price Range Lower Range Limit	0
Share Based Compensation Shares Authorized Under Stock Option Plans, Forfeitures and Expirations in Period Exercise Price Range Upper Range Limit	0
Stock Options Weighted Average Exercise Price
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	25.36	$ 35.33
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	0
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	46.72
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price	$ 25.36
Restricted Stock [Member]
Restricted Stock Shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	7,404	8,744
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	7,404
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Exercised in Period	(8,744)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	0
Restricted Stock Deferred Compensation
Deferred Compensation Arrangement with Individual, Recorded Liability	$ 1	$ 1
Deferred Compensation Arrangement, Grants in Period	1
Deferred Compensation Arrangement, Exercised in Period	0
Deferred Compensation Arrangement, Forfeitures and Expirations in Period	0
Deferred Compensation Arrangement, Amortization	$ (1)
Restricted Stock Weighted Average Grant Price
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 67.53	$ 57.19
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	67.53
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Exercises in Period, Weighted Average Grant Date Fair Value	57.19
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$ 0
Restricted Stock Units (RSUs) [Member]
Restricted Stock Shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	4,813,529	4,153,719
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	2,709,623
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Exercised in Period	(1,808,091)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	(241,722)
Restricted Stock Weighted Average Grant Price
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 56.63	$ 44.68
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	67.95
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Exercises in Period, Weighted Average Grant Date Fair Value	42.84
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$ 59.62
Range 1 [Member]
Stock Options Shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	884,601
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options	884,601
Stock Options Weighted Average Exercise Price
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 25.36
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price	$ 25.36
Restricted Stock Weighted Average Grant Price
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	3 years

Stock Options by Ranges of Exer

Stock Options by Ranges of Exercise Price (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	884,601	1,659,305
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 25.36	$ 35.33
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options	884,601
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price	$ 25.36
Range 1 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	884,601
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 25.36
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	$ 22
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options	884,601
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price	$ 25.36
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$ 22

Intrinsic and Fair Value of Sto

Intrinsic and Fair Value of Stock-based Compensation (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	[1]	$ 17	$ 28	$ 43
Share-based Compensation Arrangement by Share-based Payment Award, RSUs, Vested in Period, Fair Value	[1]	77	62	74
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	[1]	$ 1	$ 0	$ 41
[1]	Measured as of the grant date.

Stock-Based Compensation Expens

Stock-Based Compensation Expense Recognized in Noninterest Expense (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restricted Stock Unit Expense		$ 104	$ 83	$ 56
Performance Stock Units Expense	[1]	35	77	67
Restricted Stock or Unit Expense		1	0	2
Share-based Compensation		140	160	125
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	[2]	$ 34	$ 61	$ 48
[1]	Phantom stock units are settled in cash. The Company paid $76 million , $80 million , and $28 million during the years ended December 31, 2018, 2017, and 2016
[2]	Does not include excess tax benefits or deficiencies recognized in the Provision for income taxes in the Consolidated Statements of Income.

Employee Benefit Plans Stock-Ba

Employee Benefit Plans Stock-Based Compensation Expense Recognized in Noninterest Expense (Additional Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Performance Stock Units, Cash Distributions	$ 76	$ 80	$ 28

Defined Benefit Plan, Change in

Defined Benefit Plan, Change in Obligations and Fair Value (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Defined Benefit Plan, Plan Assets, Amount		$ 3,017		$ 3,432
Defined Benefit Plan, Funded (Unfunded) Status of Plan		484		464
Pension Plan [Member]
Defined Benefit Plan, Benefit Obligation	[2]	2,468	[1]	2,910	[1]	$ 2,747
Defined Benefit Plan, Service Cost	[3]	6	[2]	5	[2]	5
Defined Benefit Plan, Interest Cost		91	[2]	95	[2]	97
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant	[2]	0		0
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	[2]	(228)		225
Defined Benefit Plan, Benefit Obligation, Benefits Paid	[2]	(178)		(156)
Defined Benefit Plan, Benefit Obligation, Administrative Expenses	[2]	(6)		(6)
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	[2]	0		0
Defined Benefit Plan, Benefit Obligation, Special and Contractual Termination Benefits	[2]	0		0
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement	[2]	(127)		0
Defined Benefit Plan, Plan Assets, Amount	[2]	2,885		3,288		3,016
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	[2]	(100)		425
Defined Benefit Plan, Plan Assets, Contributions by Employer	[2]	8		9
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant	[2]	0		0
Defined Benefit Plan, Plan Assets, Benefits Paid	[2]	(178)		(156)
Defined Benefit Plan, Plan Assets, Administration Expense	[2]	(6)		(6)
Defined Benefit Plan, Plan Assets, Payment for Settlement	[2]	(127)		0
Defined Benefit Plan, Funded (Unfunded) Status of Plan	[2],[4]	$ 417		$ 378
Defined Benefit Plan, Funded Percentage	[2]	117.00%		113.00%
Defined Benefit Plan, Accumulated Benefit Obligation	[2]	$ 2,468		$ 2,910
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	[2]	4.27%		3.62%
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Benefit Obligation		$ 51		$ 58		58
Defined Benefit Plan, Service Cost		0		0		0
Defined Benefit Plan, Interest Cost		1		1		2
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant		5		4
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)		(2)		(1)
Defined Benefit Plan, Benefit Obligation, Benefits Paid		(11)		(8)
Defined Benefit Plan, Benefit Obligation, Administrative Expenses		0		0
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment		0		(5)
Defined Benefit Plan, Benefit Obligation, Special and Contractual Termination Benefits		0		9
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement		0		0
Defined Benefit Plan, Plan Assets, Amount		155		164		$ 157
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)		(3)		11
Defined Benefit Plan, Plan Assets, Contributions by Employer	[5]	0		0
Defined Benefit Plan, Plan Assets, Benefits Paid		(11)		(8)
Defined Benefit Plan, Plan Assets, Administration Expense		0		0
Defined Benefit Plan, Plan Assets, Payment for Settlement		0		0
Defined Benefit Plan, Funded (Unfunded) Status of Plan	[6]	$ 104		$ 106
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate		3.96%		3.29%
Valuation, Market Approach [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant		$ 5		$ 4
[1]	Includes $68 million and $78 million of benefit obligations for the unfunded nonqualified supplemental pension plans at December 31, 2018 and 2017
[2]	Employer contributions represent the benefits that were paid to nonqualified plan participants. Unfunded nonqualified supplemental pension plans are not funded through plan assets.
[3]	Administrative fees are recognized in service cost for each of the periods presented.
[4]	Pension benefits included assets of $485 million and $456 million , and liabilities of $68 million and $78 million , at December 31, 2018 and 2017
[5]	The Company contributed less than $1 million to the other postretirement benefits plans during both 2018 and 2017
[6]	Other postretirement benefits included assets of $104 million and $106 million at December 31, 2018 and 2017

Defined Benefit Plan, Change _2

Defined Benefit Plan, Change in Obligations and Fair Value (Additional Information) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Other Assets	[1],[2]	$ 8,991	$ 9,099
Other Liabilities		3,226	4,179
Pension Plan [Member]
Liability, Defined Benefit Plan, Current		68	78
Defined Benefit Plan, Plan Assets, Contributions by Employer	[3]	8	9
Common Stock Held in Pension Plan		0
Other Assets		485	456
Other Liabilities		68	78
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Contributions by Employer	[4]	0	0
Other Assets		$ 104	$ 106
[1]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities available for sale to Other assets. Reclassifications have been made to previously reported amounts for comparability.
[2]	Beginning October 1, 2018, the Company reclassified software and related accumulated amortization previously presented in Other assets to Premises, property, and equipment, net. Reclassifications have been made to previously reported amounts for comparability.
[3]	Employer contributions represent the benefits that were paid to nonqualified plan participants. Unfunded nonqualified supplemental pension plans are not funded through plan assets.
[4]	The Company contributed less than $1 million to the other postretirement benefits plans during both 2018 and 2017

Components of Net Periodic Bene

Components of Net Periodic Benefit Cost (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Deferred losses related to NCF Retirement Plan settlement	[1]	$ (60)		$ 0		$ 0
Pension Plan [Member]
Defined Benefit Plan, Service Cost	[2]	6	[3]	5	[3]	5
Defined Benefit Plan, Interest Cost		91	[3]	95	[3]	97
Defined Benefit Plan, Expected Return (Loss) on Plan Assets		(187)		(195)		(186)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)		0		0		0
Defined Benefit Plan, Amortization of Gain (Loss)		22		25		25
Deferred losses related to NCF Retirement Plan settlement		60		0		0
Defined Benefit Plan, Other Cost (Credit)		0		0		0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)		$ (8)		$ (70)		$ (59)
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate		3.62%		4.18%		4.44%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets		5.90%		6.66%		6.68%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Interest Crediting Rate		3.00%		3.11%		3.00%
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Service Cost		$ 0		$ 0		$ 0
Defined Benefit Plan, Interest Cost		1		1		2
Defined Benefit Plan, Expected Return (Loss) on Plan Assets		(5)		(5)		(5)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)		(6)		(6)		(6)
Defined Benefit Plan, Amortization of Gain (Loss)		0		0		0
Deferred losses related to NCF Retirement Plan settlement		0		0		0
Defined Benefit Plan, Other Cost (Credit)		0		9		0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)		$ (10)		$ (1)		$ (9)
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate		3.29%		3.70%		3.95%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets		3.10%		3.12%		3.13%
[1]	Related to the Company's NCF Retirement Plan settlement in the fourth quarter of 2018. See Note 17
[2]	Administrative fees are recognized in service cost for each of the periods presented.
[3]	Employer contributions represent the benefits that were paid to nonqualified plan participants. Unfunded nonqualified supplemental pension plans are not funded through plan assets.

Amounts Recognized in AOCI (Det

Amounts Recognized in AOCI (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax		$ 6	$ 6	$ 6
Deferred losses related to NCF Retirement Plan settlement	[1]	60	0	0
Pension Plan [Member]
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax		0	0
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax		978	1,001
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax		978	1,001
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax		59
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax		0
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Reclassification Adjustment, before Tax		(22)
Deferred losses related to NCF Retirement Plan settlement		(60)	0	0
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax		(23)
Defined Benefit Plans Recognized in Periodic Benefit Cost and Accumulated Comprehensive Income		(31)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax		(52)	(58)
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax		(17)	(22)
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax		(69)	(80)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax		5
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax		6
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Reclassification Adjustment, before Tax		0
Deferred losses related to NCF Retirement Plan settlement		0	$ 0	$ 0
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax		(11)
Defined Benefit Plans Recognized in Periodic Benefit Cost and Accumulated Comprehensive Income		$ 1
[1]	Related to the Company's NCF Retirement Plan settlement in the fourth quarter of 2018. See Note 17

Plan Assets Related to Pension

Plan Assets Related to Pension and OPB Benefits by Level within the Fair Value Hierarchy (Detail) - USD ($) $ in Millions		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Defined Benefit Plan, Plan Assets, Amount		$ 3,017		$ 3,432
Defined Benefit Plan Accrued Income Threshold for Inclusion, Percent of Total Plan Assets		0.90%		700000.00%
Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Plan Assets, Amount		$ 971	[1]	$ 1,743	[2]
Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Plan Assets, Amount		2,046	[1]	1,689	[2]
Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Plan Assets, Amount		0	[1]	0	[2]
Money Market Funds [Member]
Defined Benefit Plan, Plan Assets, Amount		112	[3]	138	[4]
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Plan Assets, Amount		112	[1],[3]	138	[2],[4]
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Plan Assets, Amount		0	[1],[3]	0	[2],[4]
Money Market Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Plan Assets, Amount		0	[1],[3]	0	[2],[4]
Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Amount	[5]	2,885		3,288		$ 3,016
Pension Plan [Member] | Equity Securities [Member]
Defined Benefit Plan, Plan Assets, Amount		382		936
Pension Plan [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Plan Assets, Amount		382	[1]	936	[2]
Pension Plan [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Plan Assets, Amount		0	[1]	0	[2]
Pension Plan [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Plan Assets, Amount		0	[1]	0	[2]
Pension Plan [Member] | Derivative [Member]
Defined Benefit Plan, Plan Assets, Amount		2		(5)
Pension Plan [Member] | Derivative [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Plan Assets, Amount		0	[1]	(5)	[2]
Pension Plan [Member] | Derivative [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Plan Assets, Amount		2	[1]	0	[2]
Pension Plan [Member] | Derivative [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Plan Assets, Amount		0	[1]	0	[2]
Pension Plan [Member] | Fixed Income Securities [Member]
Defined Benefit Plan, Plan Assets, Amount		2,377		2,201
Pension Plan [Member] | Fixed Income Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Plan Assets, Amount		333	[1]	512	[2]
Pension Plan [Member] | Fixed Income Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Plan Assets, Amount		2,044	[1]	1,689	[2]
Pension Plan [Member] | Fixed Income Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Plan Assets, Amount		0	[1]	0	[2]
Pension Plan [Member] | Other Assets [Member]
Defined Benefit Plan, Plan Assets, Amount				9
Pension Plan [Member] | Other Assets [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Plan Assets, Amount	[2]			9
Pension Plan [Member] | Other Assets [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Plan Assets, Amount	[2]			0
Pension Plan [Member] | Other Assets [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Plan Assets, Amount	[2]			0
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Amount		155		164		$ 157
Other Postretirement Benefits Plan [Member] | Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Plan Assets, Amount		11		11
Other Postretirement Benefits Plan [Member] | Equity Funds [Member]
Defined Benefit Plan, Plan Assets, Amount		46	[6]	56	[7]
Other Postretirement Benefits Plan [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Plan Assets, Amount		46	[1],[6]	56	[2],[7]
Other Postretirement Benefits Plan [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Plan Assets, Amount		0	[1],[6]	0	[2],[7]
Other Postretirement Benefits Plan [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Plan Assets, Amount		0	[1],[6]	0	[2],[7]
Other Postretirement Benefits Plan [Member] | Nontaxable Municipal Bonds [Member]
Defined Benefit Plan, Plan Assets, Amount		86	[6]	85	[7]
Other Postretirement Benefits Plan [Member] | Nontaxable Municipal Bonds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Plan Assets, Amount		86	[1],[6]	85	[2],[7]
Other Postretirement Benefits Plan [Member] | Nontaxable Municipal Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Plan Assets, Amount		0	[1],[6]	0	[2],[7]
Other Postretirement Benefits Plan [Member] | Nontaxable Municipal Bonds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Plan Assets, Amount		0	[1],[6]	0	[2],[7]
Other Postretirement Benefits Plan [Member] | Taxable Fixed Income Index Funds [Member]
Defined Benefit Plan, Plan Assets, Amount		12	[6]	12	[7]
Other Postretirement Benefits Plan [Member] | Taxable Fixed Income Index Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Plan Assets, Amount		12	[1],[6]	12	[2],[7]
Other Postretirement Benefits Plan [Member] | Taxable Fixed Income Index Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Plan Assets, Amount		0	[1],[6]	0	[2],[7]
Other Postretirement Benefits Plan [Member] | Taxable Fixed Income Index Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Plan Assets, Amount		$ 0	[1],[6]	$ 0	[2],[7]
[1]	Fair value measurements do not include pension benefits accrued income amounting to less than 0.9%
[2]	Fair value measurements do not include pension benefits accrued income amounting to less than 0.7%
[3]	Includes $11 million
[4]	Includes $11 million
[5]	Employer contributions represent the benefits that were paid to nonqualified plan participants. Unfunded nonqualified supplemental pension plans are not funded through plan assets.
[6]	Relates exclusively to other postretirement benefit plans.
[7]	Relates exclusively to other postretirement benefit plans.

Target and Weighted Average All

Target and Weighted Average Allocation for Pension and OPB Plans by Asset Category (Detail)	Dec. 31, 2018	Dec. 31, 2017
Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	100.00%	100.00%
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	100.00%	100.00%
Cash Equivalents [Member] | Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	4.00%	4.00%
Cash Equivalents [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	7.00%	7.00%
Equity Securities [Member] | Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	13.00%	29.00%
Equity Securities [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	30.00%	34.00%
Debt Securities [Member] | Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	83.00%	67.00%
Debt Securities [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	63.00%	59.00%
Minimum [Member] | Cash Equivalents [Member] | Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	0.00%
Minimum [Member] | Cash Equivalents [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	5.00%
Minimum [Member] | Equity Securities [Member] | Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	0.00%
Minimum [Member] | Equity Securities [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	20.00%
Minimum [Member] | Debt Securities [Member] | Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	75.00%
Minimum [Member] | Debt Securities [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	50.00%
Maximum [Member] | Cash Equivalents [Member] | Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	10.00%
Maximum [Member] | Cash Equivalents [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	15.00%
Maximum [Member] | Equity Securities [Member] | Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	25.00%
Maximum [Member] | Equity Securities [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	40.00%
Maximum [Member] | Debt Securities [Member] | Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	100.00%
Maximum [Member] | Debt Securities [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	70.00%

Employee Benefit Plans Expected

Employee Benefit Plans Expected Benefit Payments (Details) $ in Millions	Dec. 31, 2018USD ($)
Pension Plan [Member]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ 175	[1]
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	161	[1]
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	161	[1]
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	159	[1]
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	159	[1]
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	773	[1]
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	6	[2]
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	6	[2]
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	6	[2]
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	5	[2]
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	4	[2]
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	16	[2]
Plan Trusts [Member] | Pension Plan [Member]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	0	[1]
Plan Trusts [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	0	[2]
Plan Participants [Member] | Pension Plan [Member]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	7	[1],[3]
Plan Participants [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 0	[2],[3]
[1]	Based on the funding status and ERISA limitations, the Company anticipates contributions to the Retirement Plan will not be required during 2019
[2]	Expected payments under other postretirement benefit plans are shown net of participant contributions.
[3]	The expected benefit payments for the SERP

Guarantees - Additional Informa

Guarantees - Additional Information (Details) - USD ($) shares in Millions, $ in Millions	1 Months Ended
	May 31, 2009	Dec. 31, 2018	Dec. 31, 2017
Derivative Liability, Fair Value, Gross Asset		$ 1,654	$ 2,731
Standby Letters of Credit [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted		2,900	2,600
Visa Interest [Member]
Derivative Liability, Fair Value, Gross Asset		7	15
Not Designated as Hedging Instrument [Member] | Derivative Financial Instruments, Liabilities [Member] | Visa Interest [Member]
Number Of Shares Sold To Selected Financial Institutions	3.2
Guarantee of Indebtedness of Others [Member]
Loss Contingency Related Loans Unpaid Principal Balance		3,500	3,400
Guarantor Obligations, Maximum Exposure, Undiscounted		1,000	962
Loss Contingency Accrual, at Carrying Value		$ 5	$ 11

Guarantees Mortgage Loans Repur

Guarantees Mortgage Loans Repurchase Reserve Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Guarantees [Abstract]
Reserve For Mortgage Loan Repurchase Losses	$ 26	$ 39	$ 40	$ 57
Mortgage Repurchase Reserve, Provision for Mortgage Loan Repurchase Losses	(9)	0	(17)
Charge Offs For Mortgage Loan Repurchase Losses	$ 4	$ 1	$ 0

Guarantees Repurchased Mortgage

Guarantees Repurchased Mortgage Loan (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Repurchased mortgage loans, carrying value	$ 199	$ 219
Performing Financial Instruments [Member] | Loans Held-For-Investment [Member]
Repurchased mortgage loans, carrying value	183	203
Nonperforming Financing Receivable [Member] | Loans Held-For-Investment [Member]
Repurchased mortgage loans, carrying value	$ 16	$ 16

Derivative Financial Instrume_3

Derivative Financial Instruments - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Derivative Liability, Fair Value, Gross Liability	$ 2,716	$ 4,442
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	178
Derivative, Notional Amount	233,052	249,705
Derivative Asset, Fair Value, Gross Asset	2,631	3,904
Netted counterparty balance [Member]
Fair Value, Concentration of Risk, Derivative Instruments, Assets	541	541
Derivative Asset, Fair Value of Collateral	350	399
Netted counterparty balance gains [Member]
Fair Value, Concentration of Risk, Derivative Instruments, Assets	891	940
Derivative liability positions containing provisions conditioned on downgrades [Member]
Derivative Liability, Fair Value, Gross Liability	589	1,100
Additional Termination Event [Member]
Derivative Liability, Fair Value, Gross Liability	1
Additional Termination Event [Member] | Maximum [Member]
Derivative Liability, Fair Value, Gross Liability	10
Credit Support Annex [Member]
Derivative Liability, Fair Value, Gross Liability	580
Collateral Already Posted, Aggregate Fair Value	536
Credit Support Annex [Member] | Moody's, Baa2 Rating [Member]
Additional Collateral, Aggregate Fair Value	1
Credit Support Annex [Member] | Moody's, Baa3 Rating [Member]
Additional Collateral, Aggregate Fair Value	6
Credit Support Annex [Member] | Moody's, Ba1 Rating [Member]
Additional Collateral, Aggregate Fair Value	10
Credit Default Swap, Buying Protection [Member]
Derivative, Notional Amount		5
Total Return Swap [Member]
Derivative Liability, Fair Value, Gross Liability	94	13
Collateral Already Posted, Aggregate Fair Value	601	368
Derivative, Notional Amount	2,000	1,700
Derivative Asset, Fair Value, Gross Asset	$ 97	$ 15
Financial Guarantee [Member]
Derivative, Average Remaining Maturity	5 years 10 months 24 days	5 years 6 months
Credit Derivative, Maximum Exposure, Undiscounted	$ 217	$ 55
Financial Guarantee [Member] | Minimum [Member]
Derivative, Remaining Maturity	1 year	1 year
Financial Guarantee [Member] | Maximum [Member]
Derivative, Remaining Maturity	10 years	9 years
Interest Rate Contract [Member] | Cash Flow Hedging [Member]
Derivative, Average Remaining Maturity	2 years 6 months	3 years 7 months 6 days
Interest Rate Contract [Member] | Minimum [Member] | Cash Flow Hedging [Member]
Derivative, Remaining Maturity	1 year	1 year
Interest Rate Contract [Member] | Maximum [Member] | Cash Flow Hedging [Member]
Derivative, Remaining Maturity	5 years	5 years
Interest Income [Member] | Loans Held-For-Investment [Member] | Interest Rate Contract [Member] | Cash Flow Hedging [Member]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	$ (161)	$ (54)	$ (145)

Derivative Positions (Detail)

Derivative Positions (Detail) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Derivative, Notional Amount		$ 233,052	$ 249,705
Derivative Asset, Fair Value, Gross Asset		2,631	3,904
Derivative Liability, Fair Value, Gross Liability		2,716	4,442
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		2,631	3,904
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		2,716	4,442
Derivative, Fair Value, Amount Offset Against Collateral, Net		(1,654)	(2,731)
Derivative Liability, Fair Value, Gross Asset		1,654	2,731
Derivative Asset, Collateral, Obligation to Return Cash, Offset		(338)	(371)
Derivative Liability, Collateral, Right to Reclaim Cash, Offset		(652)	(1,303)
Derivative Asset	[1]	639	802
Derivative Liability	[2]	410	408
Not Designated as Hedging Instrument [Member]
Derivative, Notional Amount	[3]	212,943	229,525
Derivative Asset, Fair Value, Gross Asset	[3]	2,629	3,901
Derivative Liability, Fair Value, Gross Liability	[3]	2,713	4,132
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]
Derivative, Notional Amount	[3]	9,824	7,058
Derivative Asset, Fair Value, Gross Asset	[3]	129	110
Derivative Liability, Fair Value, Gross Liability	[3]	119	102
Not Designated as Hedging Instrument [Member] | Equity Contract [Member]
Derivative, Notional Amount	[3],[4]	34,471	38,907
Derivative Asset, Fair Value, Gross Asset	[3],[4]	1,447	2,499
Derivative Liability, Fair Value, Gross Liability	[3],[4]	1,644	2,857
Not Designated as Hedging Instrument [Member] | Other Contract [Member]
Derivative, Notional Amount	[3],[5]	1,393	2,017
Derivative Asset, Fair Value, Gross Asset	[3],[5]	20	18
Derivative Liability, Fair Value, Gross Liability	[3],[5]	15	16
Not Designated as Hedging Instrument [Member] | Commodity [Member]
Derivative, Notional Amount	[3]	2,020	1,422
Derivative Asset, Fair Value, Gross Asset	[3]	93	63
Derivative Liability, Fair Value, Gross Liability	[3]	91	61
Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Mortgage Servicing Rights [Member]
Derivative, Notional Amount	[3],[6]	28,011	42,021
Derivative Asset, Fair Value, Gross Asset	[3],[6]	54	119
Derivative Liability, Fair Value, Gross Liability	[3],[6]	10	119
Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Loans Held-For-Sale [Member]
Derivative, Notional Amount	[3],[7]	4,891	7,590
Derivative Asset, Fair Value, Gross Asset	[3],[7]	18	9
Derivative Liability, Fair Value, Gross Liability	[3],[7]	38	6
Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Loans Held-For-Investment [Member]
Derivative, Notional Amount	[3]	159	175
Derivative Asset, Fair Value, Gross Asset	[3]	0	2
Derivative Liability, Fair Value, Gross Liability	[3]	0	2
Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Other Trading [Member]
Derivative, Notional Amount	[3],[4]	127,286	126,366
Derivative Asset, Fair Value, Gross Asset	[3],[4]	771	1,066
Derivative Liability, Fair Value, Gross Liability	[3],[4]	687	946
Not Designated as Hedging Instrument [Member] | Credit Risk Contract [Member] | Loans Held-For-Investment [Member]
Derivative, Notional Amount	[3]	830	515
Derivative Asset, Fair Value, Gross Asset	[3]	0	0
Derivative Liability, Fair Value, Gross Liability	[3]	14	11
Not Designated as Hedging Instrument [Member] | Credit Risk Contract [Member] | Other Trading [Member]
Derivative, Notional Amount	[3],[8]	4,058	3,454
Derivative Asset, Fair Value, Gross Asset	[3],[8]	97	15
Derivative Liability, Fair Value, Gross Liability	[3],[8]	95	12
Cash Flow Hedging [Member] | Interest Rate Contract [Member]
Derivative, Notional Amount	[9]	10,500	14,200
Derivative Asset, Fair Value, Gross Asset	[9]	1	2
Derivative Liability, Fair Value, Gross Liability	[9]	2	252
Cash Flow Hedging [Member] | Interest Rate Contract [Member] | Loans Held-For-Investment [Member]
Derivative, Notional Amount	[9]	10,500	14,200
Derivative Asset, Fair Value, Gross Asset	[9]	1	2
Derivative Liability, Fair Value, Gross Liability	[9]	2	252
Fair Value Hedging [Member] | Interest Rate Contract [Member]
Derivative, Notional Amount	[10]	9,609	5,980
Derivative Asset, Fair Value, Gross Asset	[10]	1	1
Derivative Liability, Fair Value, Gross Liability	[10]	1	58
Fair Value Hedging [Member] | Interest Rate Contract [Member] | Fixed Income Interest Rate [Member]
Derivative, Notional Amount	[10]	9,550	5,920
Derivative Asset, Fair Value, Gross Asset	[10]	1	1
Derivative Liability, Fair Value, Gross Liability	[10]	1	58
Fair Value Hedging [Member] | Interest Rate Contract [Member] | Brokered Time Deposits [Member]
Derivative, Notional Amount	[10]	59	60
Derivative Asset, Fair Value, Gross Asset	[10]	0	0
Derivative Liability, Fair Value, Gross Liability	[10]	$ 0	$ 0
[1]	At December 31, 2018 , $639 million , net of $338 million offsetting cash collateral, is recognized in Trading assets and derivative instruments within the Company's Consolidated Balance Sheets. At December 31, 2017 , $802 million , net of $371 million
[2]	At December 31, 2018 , $410 million , net of $652 million offsetting cash collateral, is recognized in Trading liabilities and derivative instruments within the Company's Consolidated Balance Sheets. At December 31, 2017 , $408 million , net of $1.3 billion
[3]	See “Economic Hedging Instruments and Trading Activities” in this Note for further discussion
[4]	Notional amounts include $1.2 billion and $9.8 billion related to interest rate futures at December 31, 2018 and 2017 , and $136 million and $1.2 billion related to equity futures at December 31, 2018 and 2017
[5]	Notional amounts include $41 million and $49 million related to the Visa derivative liability at December 31, 2018 and December 31, 2017 , respectively. See Note 18 , "Gua rantees" for additional information.
[6]	Notional amounts include $921 million and $16.6 billion related to interest rate futures at December 31, 2018 and 2017 , respectively. These futures contracts settle in cash daily, one day in arrears. The derivative asset or liability associated with the one day lag is included in the fair value column of this table.
[7]	Notional amounts include $116 million and $190 million related to interest rate futures at December 31, 2018 and 2017
[8]	Notional amounts include $6 million and $4 million from purchased credit risk participation agreements at December 31, 2018 and December 31, 2017 , and $33 million and $11 million from written credit risk participation agreements at December 31, 2018 and December 31, 2017 , respectively. These notional amounts are calculated as the notional of the derivative participated adjusted by the relevant RWA
[9]	See “Cash Flow Hedging” in this Note for further discussion.
[10]	See “Fair Value Hedging” in this Note for further discussion.

Derivative Positions (Additiona

Derivative Positions (Additional Information) (Detail) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Derivative, Notional Amount	$ 233,052	$ 249,705
Credit Risk Contract [Member]
Derivative Asset, Notional Amount	6	4
Derivative Liability, Notional Amount	33	11
Other Contract [Member] | Visa Interest [Member]
Derivative Liability, Notional Amount	41	49
Interest rate futures [Member] | Mortgage Servicing Rights [Member]
Derivative, Notional Amount	921	16,600
Interest rate futures [Member] | Loans Held-For-Sale [Member]
Derivative, Notional Amount	116	190
Interest rate futures [Member] | Other Trading [Member]
Derivative, Notional Amount	1,200	9,800
Equity Futures [Member] | Equity Contract [Member]
Derivative, Notional Amount	$ 136	$ 1,200

Derivative Financial Instrume_4

Derivative Financial Instruments Netting of Financial Instruments - Derivatives (Details) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset		$ 2,631	$ 3,904
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		2,631	3,904
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset		1,992	3,102
Derivative Asset	[1]	639	802
Derivative, Collateral, Obligation to Return Securities		12	28
Derivative Asset, Fair Value, Amount Not Offset Against Collateral		627	774
Derivative Liability, Fair Value, Gross Liability		2,716	4,442
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		2,716	4,442
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset		2,306	4,034
Derivative Liability	[2]	410	408
Derivative, Collateral, Right to Reclaim Securities		14	27
Derivative Liability, Fair Value, Amount Not Offset Against Collateral		396	381
Derivatives Subject to Master Netting Arrangement or Similar Arrangement [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset		2,425	3,491
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset		1,873	2,923
Derivative Asset		552	568
Derivative, Collateral, Obligation to Return Securities		12	28
Derivative Asset, Fair Value, Amount Not Offset Against Collateral		540	540
Derivative Liability, Fair Value, Gross Liability		2,521	4,128
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset		2,187	3,855
Derivative Liability		334	273
Derivative, Collateral, Right to Reclaim Securities		14	27
Derivative Liability, Fair Value, Amount Not Offset Against Collateral		320	246
Derivatives Not Subject to Master Netting Arrangement or Similar Arrangement [Member] [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset		20	18
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset		0	0
Derivative Asset		20	18
Derivative, Collateral, Obligation to Return Securities		0	0
Derivative Asset, Fair Value, Amount Not Offset Against Collateral		20	18
Derivative Liability, Fair Value, Gross Liability		76	130
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset		0	0
Derivative Liability		76	130
Derivative, Collateral, Right to Reclaim Securities		0	0
Derivative Liability, Fair Value, Amount Not Offset Against Collateral		76	130
Exchange Traded [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset		186	395
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset		119	179
Derivative Asset		67	216
Derivative, Collateral, Obligation to Return Securities		0	0
Derivative Asset, Fair Value, Amount Not Offset Against Collateral		67	216
Derivative Liability, Fair Value, Gross Liability		119	184
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset		119	179
Derivative Liability		0	5
Derivative, Collateral, Right to Reclaim Securities		0	0
Derivative Liability, Fair Value, Amount Not Offset Against Collateral		$ 0	$ 5
[1]	At December 31, 2018 , $639 million , net of $338 million offsetting cash collateral, is recognized in Trading assets and derivative instruments within the Company's Consolidated Balance Sheets. At December 31, 2017 , $802 million , net of $371 million
[2]	At December 31, 2018 , $410 million , net of $652 million offsetting cash collateral, is recognized in Trading liabilities and derivative instruments within the Company's Consolidated Balance Sheets. At December 31, 2017 , $408 million , net of $1.3 billion

Derivative Financial Instrume_5

Derivative Financial Instruments Netting of Financial Instruments - Derivatives (Additional Information) (Details) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Derivative [Line Items]
Derivative Asset	[1]	$ 639	$ 802
Derivative Asset, Collateral, Obligation to Return Cash, Offset		338	371
Derivative Liability	[2]	410	408
Derivative Liability, Collateral, Right to Reclaim Cash, Offset		652	1,303
Trading Assets [Member]
Derivative [Line Items]
Derivative Asset		639	802
Trading Liabilities [Member]
Derivative [Line Items]
Derivative Liability		$ 410	$ 408
[1]	At December 31, 2018 , $639 million , net of $338 million offsetting cash collateral, is recognized in Trading assets and derivative instruments within the Company's Consolidated Balance Sheets. At December 31, 2017 , $802 million , net of $371 million
[2]	At December 31, 2018 , $410 million , net of $652 million offsetting cash collateral, is recognized in Trading liabilities and derivative instruments within the Company's Consolidated Balance Sheets. At December 31, 2017 , $408 million , net of $1.3 billion

Derivative Financial Instrume_6

Derivative Financial Instruments Derivative Instruments, Gain (Loss) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017	Dec. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Interest and Fee Income, Loans and Leases Held-in-portfolio		$ 6,058		$ 5,385	$ 4,939
Interest Expense, Long-term Debt		(375)		(288)	(260)
Interest Expense, Deposits		(711)		(404)	(259)
Trading Gain (Loss)		161		189	211
Total Amounts of Line Items Presented in the Consolidated Statements of Income		5,133		4,882	4,631
Loans Held-For-Investment [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest and Fee Income, Loans and Leases Held-in-portfolio		6,058		5,385	4,939
Long-term Debt [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest Expense, Long-term Debt		(375)		(288)	(260)
Brokered Time Deposits [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest Expense, Deposits		(711)		(404)	(259)
Other Trading [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading Gain (Loss)		161		189	211
Fair Value Hedging [Member] | Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amounts Related to Interest Settlements on Derivatives		(1)		15	17
Derivative, Gain (Loss) on Derivative, Net		(24)		(38)	(87)
Gain (Loss) on Fair Value Hedges Recognized in Earnings		11		40	89
Net Income (Expense) Recognized on Hedges		(14)		17	19
Fair Value Hedging [Member] | Interest Rate Contract [Member] | Loans Held-For-Investment [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amounts Related to Interest Settlements on Derivatives		0		0	0
Derivative, Gain (Loss) on Derivative, Net		0		0	0
Gain (Loss) on Fair Value Hedges Recognized in Earnings		0		0	0
Net Income (Expense) Recognized on Hedges		0		0	0
Fair Value Hedging [Member] | Interest Rate Contract [Member] | Long-term Debt [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amounts Related to Interest Settlements on Derivatives		(1)		15	17
Derivative, Gain (Loss) on Derivative, Net		(24)		0	0
Gain (Loss) on Fair Value Hedges Recognized in Earnings		11	[1]	0	0
Net Income (Expense) Recognized on Hedges		(14)		15	17
Fair Value Hedging [Member] | Interest Rate Contract [Member] | Brokered Time Deposits [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amounts Related to Interest Settlements on Derivatives		0		0	0
Derivative, Gain (Loss) on Derivative, Net		0		0	0
Gain (Loss) on Fair Value Hedges Recognized in Earnings		0		0	0
Net Income (Expense) Recognized on Hedges		0		0	0
Fair Value Hedging [Member] | Interest Rate Contract [Member] | Other Trading [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amounts Related to Interest Settlements on Derivatives		0		0	0
Derivative, Gain (Loss) on Derivative, Net		0		(38)	(87)
Gain (Loss) on Fair Value Hedges Recognized in Earnings		0		40	89
Net Income (Expense) Recognized on Hedges		0		2	2
Cash Flow Hedging [Member] | Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		(72)		89	244
Net Income (Expense) Recognized on Hedges		(72)		89	244
Cash Flow Hedging [Member] | Interest Rate Contract [Member] | Loans Held-For-Investment [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	[2]	(72)		89	244
Net Income (Expense) Recognized on Hedges		(72)		89	244
Cash Flow Hedging [Member] | Interest Rate Contract [Member] | Long-term Debt [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		0		0	0
Net Income (Expense) Recognized on Hedges		0		0	0
Cash Flow Hedging [Member] | Interest Rate Contract [Member] | Brokered Time Deposits [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		0		0	0
Net Income (Expense) Recognized on Hedges		0		0	0
Cash Flow Hedging [Member] | Interest Rate Contract [Member] | Other Trading [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		0		0	0
Net Income (Expense) Recognized on Hedges		$ 0		$ 0	$ 0
[1]	Includes amortization from de-designated fair value hedging relationships.
[2]	These amounts include pre-tax gains/(losses) related to cash flow hedging relationships that have been terminated and were reclassified into earnings consistent with the pattern of net cash flows expected to be recognized.

Derivative Financial Instrume_7

Derivative Financial Instruments Hedged Items in Fair Value Hedging Relationships (Details) - Fair Value Hedging [Member]	12 Months Ended
	Dec. 31, 2018USD ($)
Long-term Debt [Member]
Hedged Items in Fair Value Hedging Relationships [Line Items]
Carrying Amount of Assets	$ 8,411,000,000
Long-term Debt [Member] | Designated as Hedging Instrument [Member]
Hedged Items in Fair Value Hedging Relationships [Line Items]
Hedged Asset, Cumulative Basis Adjustment	(10,000,000)
Long-term Debt [Member] | Not Designated as Hedging Instrument [Member]
Hedged Items in Fair Value Hedging Relationships [Line Items]
Hedged Asset, Cumulative Basis Adjustment	(120,000,000)
Brokered Time Deposits [Member]
Hedged Items in Fair Value Hedging Relationships [Line Items]
Carrying Amount of Assets	29,000,000
Brokered Time Deposits [Member] | Designated as Hedging Instrument [Member]
Hedged Items in Fair Value Hedging Relationships [Line Items]
Hedged Asset, Cumulative Basis Adjustment	0
Brokered Time Deposits [Member] | Not Designated as Hedging Instrument [Member]
Hedged Items in Fair Value Hedging Relationships [Line Items]
Hedged Asset, Cumulative Basis Adjustment	$ 0

Derivative Financial Instrume_8

Derivative Financial Instruments Derivative Instruments not Designated as Hedging Instruments, Gain (Loss) (Details) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Derivative Instruments not Designated as Hedging Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ 127	$ 194	$ 423
Interest Rate Contract [Member] | Mortgage Related Income [Member] | Mortgage Servicing Rights [Member]
Derivative Instruments not Designated as Hedging Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	(110)	35	45
Interest Rate Contract [Member] | Mortgage Related Income [Member] | Loans Held-For-Sale [Member]
Derivative Instruments not Designated as Hedging Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	45	(54)	(6)
Interest Rate Contract [Member] | Other Income [Member] | Loans Held-For-Investment [Member]
Derivative Instruments not Designated as Hedging Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	1	0	(1)
Interest Rate Contract [Member] | Other Trading [Member] | Other Trading [Member]
Derivative Instruments not Designated as Hedging Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	69	42	51
Foreign Exchange Contract [Member] | Other Trading [Member] | Other Trading [Member]
Derivative Instruments not Designated as Hedging Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	48	(37)	101
Credit Risk Contract [Member] | Other Income [Member] | Loans Held-For-Investment [Member]
Derivative Instruments not Designated as Hedging Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	0	(4)	(3)
Credit Risk Contract [Member] | Other Trading [Member] | Other Trading [Member]
Derivative Instruments not Designated as Hedging Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	22	26	19
Equity Contract [Member] | Other Trading [Member] | Other Trading [Member]
Derivative Instruments not Designated as Hedging Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	(12)	0	4
Other Contract [Member] | Other Trading [Member] | Commodity Contract [Member]
Derivative Instruments not Designated as Hedging Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	1	1	3
Other Contract [Member] | Mortgage Related and Commercial Real Estate Related Income [Member] | Interest Rate Lock Commitments [Member]
Derivative Instruments not Designated as Hedging Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ 63	$ 185	$ 210

Fair Value Measurement and Elec

Fair Value Measurement and Election - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Loans Receivable, Fair Value Disclosure	$ 163	$ 196
Unfunded loan commitments and letters of credit	72,000	66,400
Allowance for unfunded loan commitments and letters of credit	72	84
Reclassification of Equity Securities from Nommarketable to Marketable	22
Fair Value, Inputs, Level 1 [Member]
Loans Receivable, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member]
Loans Receivable, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member]
Loans Receivable, Fair Value Disclosure	163	196
Total Return Swap [Member] | Fair Value, Inputs, Level 2 [Member]
Loans Receivable, Fair Value Disclosure	2,000	1,700
Interest Rate Lock Commitments [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	63	191
Trading Loans [Member] | SBA Loans [Member] | Fair Value, Inputs, Level 2 [Member]
Loans Receivable, Fair Value Disclosure	366	368
Trading Loans [Member] | Commercial and Corporate Leveraged Loans [Member] | Fair Value, Inputs, Level 2 [Member]
Loans Receivable, Fair Value Disclosure	137	48
Fair Value, Measurements, Recurring [Member]
Loans Receivable, Fair Value Disclosure	163	196
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Loans Receivable, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Loans Receivable, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Loans Receivable, Fair Value Disclosure	$ 163	$ 196

Assets and Liabilities Measured

Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) - USD ($) $ in Millions		Dec. 31, 2018		Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI	[1]	$ 5,506		$ 5,093
Available-for-sale Securities	[2],[3]	31,442		30,947	[4]
Loans Held-for-sale, Fair Value Disclosure		1,200		1,600
Loans Receivable, Fair Value Disclosure		163		196
Long-term Debt, Fair Value		289		530
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		521		608
Available-for-sale Securities		4,211		4,331
Loans Held-for-sale, Fair Value Disclosure		0		0
Loans Receivable, Fair Value Disclosure		0		0
Other Assets, Fair Value Disclosure		95	[5]	56	[6]
Trading Liabilities, Fair Value Disclosure		925		769
Long-term Debt, Fair Value		0		0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		4,965		4,469
Available-for-sale Securities		27,231		26,544
Loans Held-for-sale, Fair Value Disclosure		1,178		1,577
Loans Receivable, Fair Value Disclosure		0		0
Other Assets, Fair Value Disclosure		0		0
Trading Liabilities, Fair Value Disclosure		672		498
Long-term Debt, Fair Value		289		530
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		20		16
Available-for-sale Securities		0		72
Loans Held-for-sale, Fair Value Disclosure		0		0
Loans Receivable, Fair Value Disclosure		163		196
Other Assets, Fair Value Disclosure		0		0
Trading Liabilities, Fair Value Disclosure		7		16
Long-term Debt, Fair Value		0		0
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		5,506		5,093
Available-for-sale Securities		31,442	[7]	30,947	[8]
Loans Held-for-sale, Fair Value Disclosure		1,178		1,577
Loans Receivable, Fair Value Disclosure		163		196
Servicing Asset at Fair Value, Amount		1,983		1,710
Other Assets, Fair Value Disclosure	[7]	95		56	[8]
Trading Liabilities, Fair Value Disclosure		1,604		1,283
Long-term Debt, Fair Value		289		530
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		521		608
Available-for-sale Securities		4,211	[7]	4,331	[8]
Loans Held-for-sale, Fair Value Disclosure		0		0
Loans Receivable, Fair Value Disclosure		0		0
Servicing Asset at Fair Value, Amount		0		0
Other Assets, Fair Value Disclosure		95	[7]	56	[8]
Trading Liabilities, Fair Value Disclosure		925		769
Long-term Debt, Fair Value		0		0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		6,957		7,571
Available-for-sale Securities		27,231	[7]	26,544	[8]
Loans Held-for-sale, Fair Value Disclosure		1,178		1,577
Loans Receivable, Fair Value Disclosure		0		0
Servicing Asset at Fair Value, Amount		0		0
Other Assets, Fair Value Disclosure		0	[7]	0	[8]
Trading Liabilities, Fair Value Disclosure		2,978		4,532
Long-term Debt, Fair Value		289		530
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		20		16
Available-for-sale Securities		0	[7]	72	[8]
Loans Held-for-sale, Fair Value Disclosure		0		0
Loans Receivable, Fair Value Disclosure		163		196
Servicing Asset at Fair Value, Amount		1,983		1,710
Other Assets, Fair Value Disclosure		0	[7]	0	[8]
Trading Liabilities, Fair Value Disclosure		7		16
Long-term Debt, Fair Value		0		0
US Treasury Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		262		157
Available-for-sale Securities		4,211		4,331
Trading Liabilities, Fair Value Disclosure		801		577
US Treasury Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		262		157
Available-for-sale Securities		4,211		4,331
Trading Liabilities, Fair Value Disclosure		801		577
US Treasury Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		0		0
Available-for-sale Securities		0		0
Trading Liabilities, Fair Value Disclosure		0		0
US Treasury Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		0		0
Available-for-sale Securities		0		0
Trading Liabilities, Fair Value Disclosure		0		0
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Liabilities, Fair Value Disclosure		3
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Liabilities, Fair Value Disclosure		0
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Liabilities, Fair Value Disclosure		3
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Liabilities, Fair Value Disclosure		0
US Government Agencies Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		188		395
Available-for-sale Securities		221		259
US Government Agencies Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		0		0
Available-for-sale Securities		0		0
US Government Agencies Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		188		395
Available-for-sale Securities		221		259
US Government Agencies Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		0		0
Available-for-sale Securities		0		0
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		54		61
Available-for-sale Securities		589		617
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		0		0
Available-for-sale Securities		0		0
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		54		61
Available-for-sale Securities		589		617
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		0		0
Available-for-sale Securities		0		0
Other Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		700		655
Available-for-sale Securities		14		17
Trading Liabilities, Fair Value Disclosure		385		289
Other Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		0		0
Available-for-sale Securities		0		0
Trading Liabilities, Fair Value Disclosure		0		0
Other Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		700		655
Available-for-sale Securities		14		12
Trading Liabilities, Fair Value Disclosure		385		289
Other Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		0		0
Available-for-sale Securities		0		5
Trading Liabilities, Fair Value Disclosure		0		0
Commercial Paper [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		190		118
Commercial Paper [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		0		0
Commercial Paper [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		190		118
Commercial Paper [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		0		0
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		73		56
Trading Liabilities, Fair Value Disclosure		5		9
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		73		56
Trading Liabilities, Fair Value Disclosure		5		9
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		0		0
Trading Liabilities, Fair Value Disclosure		0		0
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		0		0
Trading Liabilities, Fair Value Disclosure		0		0
Derivative Financial Instruments, Assets [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		639		802
Derivative Financial Instruments, Assets [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		186		395
Derivative Financial Instruments, Assets [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		2,425		3,493
Derivative Financial Instruments, Assets [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		20		16
Trading Loans [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		2,540		2,149
Trading Loans [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		0		0
Trading Loans [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		2,540		2,149
Trading Loans [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		0		0
Asset-backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities				8
Asset-backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities				0
Asset-backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities				0
Asset-backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities				8
Derivative Financial Instruments, Liabilities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Liabilities, Fair Value Disclosure		410		408
Derivative Financial Instruments, Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Liabilities, Fair Value Disclosure		119		183
Derivative Financial Instruments, Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Liabilities, Fair Value Disclosure		2,590		4,243
Derivative Financial Instruments, Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Liabilities, Fair Value Disclosure		7		16
Brokered Time Deposits [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deposits, Fair Value Disclosure		0		0
Brokered Time Deposits [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deposits, Fair Value Disclosure		403		236
Brokered Time Deposits [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deposits, Fair Value Disclosure		0		0
Brokered Time Deposits [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deposits, Fair Value Disclosure		403		236
Brokered Time Deposits [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deposits, Fair Value Disclosure		0		0
Brokered Time Deposits [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deposits, Fair Value Disclosure		403		236
Brokered Time Deposits [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deposits, Fair Value Disclosure		0		0
Fair Value, Concentration of Credit Risk, Master Netting Arrangements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		(1,992)	[9]	(3,102)	[10]
Trading Liabilities, Fair Value Disclosure		(2,306)	[9]	(4,034)	[10]
Fair Value, Concentration of Credit Risk, Master Netting Arrangements [Member] | Derivative Financial Instruments, Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		(1,992)	[9]	(3,102)	[10]
Fair Value, Concentration of Credit Risk, Master Netting Arrangements [Member] | Derivative Financial Instruments, Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Liabilities, Fair Value Disclosure		(2,306)	[9]	(4,034)	[10]
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		860		700
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		860		700
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		0		0
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		860		700
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		0		0
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Residential Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		22,864		22,704
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Residential Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		22,864		22,704
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Residential Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Residential Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		22,864		22,704
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Residential Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Commercial Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		2,627		2,086
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Commercial Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		2,627		2,086
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Commercial Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Commercial Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		2,627		2,086
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Commercial Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Residential Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities				59
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Residential Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities				59
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Residential Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities				0
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Residential Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities				0
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Residential Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities				59
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Commercial Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		916		866
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Commercial Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		916		866
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Commercial Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Commercial Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		916		866
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Commercial Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		$ 0		$ 0
[1]	Includes trading securities pledged as collateral where counterparties have the right to sell or repledge the collateral of $1,442 million and $1,086 million at December?31, 2018 and December?31, 2017, respectively.
[2]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities available for sale to Other assets. Reclassifications have been made to previously reported amounts for comparability.
[3]	Includes securities AFS pledged as collateral where counterparties have the right to sell or repledge the collateral of $222 million and $223 million at December?31, 2018 and December?31, 2017, respectively.
[4]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability . See Note 11 , "Other Assets," for additional information.
[5]	Other financial assets recorded at amortized cost consist of FHLB
[6]	Other financial assets recorded at amortized cost consist of FHLB
[7]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability . See Note 11
[8]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability . See Note 11
[9]	Amounts represent offsetting cash collateral received from, and paid to, the same derivative counterparties, and the impact of netting derivative assets and derivative liabilities when a legally enforceable master netting agreement or similar agreement exists. See Note 19
[10]	Amounts represent offsetting cash collateral received from, and paid to, the same derivative counterparties, and the impact of netting derivative assets and derivative liabilities when a legally enforceable master netting agreement or similar agreement exists. See Note 19

Fair Value Option Elected, Diff

Fair Value Option Elected, Difference Between the Aggregate Fair Value and the Aggregate Unpaid Principal Balance (Detail) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Debt Securities, Trading, and Equity Securities, FV-NI	[1]	$ 5,506	$ 5,093
Loans Held-for-sale, Fair Value Disclosure		1,200	1,600
Loans Receivable, Fair Value Disclosure		163	196
Trading Loans [Member]
Debt Securities, Trading, and Equity Securities, FV-NI		2,540	2,149
Aggregate Unpaid Principal Balance Under the Fair Value Option		(2,526)	(2,111)
Fair Value, Option, Aggregate Differences, Loans and Long-term Receivables		14	38
Loans Held-For-Sale [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Loans Held-for-sale, Fair Value Disclosure			1
Aggregate Unpaid Principal Balance Under the Fair Value Option			(1)
Fair Value, Option, Aggregate Differences, Loans and Long-term Receivables			0
Loans Held-For-Sale [Member] | Performing Financial Instruments [Member]
Loans Held-for-sale, Fair Value Disclosure		1,178	1,576
Aggregate Unpaid Principal Balance Under the Fair Value Option		(1,128)	(1,533)
Fair Value, Option, Aggregate Differences, Loans and Long-term Receivables		50	43
Loans Held-For-Investment [Member] | Performing Financial Instruments [Member]
Loans Receivable, Fair Value Disclosure		158	192
Aggregate Unpaid Principal Balance Under the Fair Value Option		(163)	(198)
Fair Value, Option, Loans Held as Assets, Aggregate Difference		(5)	(6)
Loans Held-For-Investment [Member] | Nonperforming Financing Receivable [Member]
Loans Receivable, Fair Value Disclosure		5	4
Aggregate Unpaid Principal Balance Under the Fair Value Option		(6)	(6)
Fair Value, Option, Loans Held as Assets, Aggregate Amount in Nonaccrual Status, Aggregated Difference		(1)	(2)
Brokered Time Deposits [Member]
Obligations, Fair Value Disclosure		403	236
Aggregate Unpaid Principal Balance Under the Fair Value Option		(403)	(233)
Fair Value, Option, Aggregate Differences, Long-term Debt Instruments		0	3
Long-term Debt [Member]
Obligations, Fair Value Disclosure		289	530
Aggregate Unpaid Principal Balance Under the Fair Value Option		(286)	(517)
Fair Value, Option, Aggregate Differences, Long-term Debt Instruments		$ 3	$ 13
[1]	Includes trading securities pledged as collateral where counterparties have the right to sell or repledge the collateral of $1,442 million and $1,086 million at December?31, 2018 and December?31, 2017, respectively.

Change in Fair Value of Financi

Change in Fair Value of Financial Instruments for which the FVO has been Elected (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Trading Loans [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)		$ 14	[1]	$ 21	[2]	$ 15	[3]
Trading Loans [Member] | Trading Revenue [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)		14		21		15
Trading Loans [Member] | Mortgage Related Income [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)		0	[4]	0	[5]	0	[6]
Trading Loans [Member] | Other Income [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)		0		0		0
Loans Held-For-Sale [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)		7	[1]	61	[2]	75	[3]
Loans Held-For-Sale [Member] | Trading Revenue [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)		0		0		0
Loans Held-For-Sale [Member] | Mortgage Related Income [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)		7	[4]	61	[5]	75	[6]
Loans Held-For-Sale [Member] | Other Income [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)		0		0		0
Loans Held-For-Investment [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)	[1]	1
Loans Held-For-Investment [Member] | Trading Revenue [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)		0
Loans Held-For-Investment [Member] | Mortgage Related Income [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)	[4]	0
Loans Held-For-Investment [Member] | Other Income [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)		1
Mortgage Servicing Rights [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)		(141)	[1]	(243)	[2]	(242)	[3]
Mortgage Servicing Rights [Member] | Trading Revenue [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)		0		0		0
Mortgage Servicing Rights [Member] | Mortgage Related Income [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)		(141)	[4]	(243)	[5]	(242)	[6]
Mortgage Servicing Rights [Member] | Other Income [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)		0		0		0
Brokered Time Deposits [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)		13	[1]			4	[3]
Brokered Time Deposits [Member] | Trading Revenue [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)		13				4
Brokered Time Deposits [Member] | Mortgage Related Income [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)		0	[4]			0	[6]
Brokered Time Deposits [Member] | Other Income [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)		0				0
Long-term Debt [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)		10	[1]	21	[2]	27	[3]
Long-term Debt [Member] | Trading Revenue [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)		10		21		27
Long-term Debt [Member] | Mortgage Related Income [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)		0	[4]	0	[5]	0	[6]
Long-term Debt [Member] | Other Income [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)		$ 0		$ 0		$ 0
[1]	Changes in fair value for the year ended December 31, 2018
[2]	Changes in fair value for the year ended December 31, 2017
[3]	Changes in fair value for the year ended December 31, 2016
[4]	Income related to LHFS does not include income from IRLC s. For the year ended December 31, 2018 , income related to residential MSRs includes income recognized upon the sale of loans reported at LOCOM
[5]	Income related to LHFS does not include income from IRLC s. For the year ended December 31, 2017 , income related to residential MSRs includes income recognized upon the sale of loans reported at LOCOM
[6]	Income related to LHFS does not include income from IRLC s. For the year ended December 31, 2016 , income related to residential MSRs includes income recognized upon the sale of loans reported at LOCOM

Fair Value Election and Measu_3

Fair Value Election and Measurement Level 3 Significant Unobservable Input Assumptions (Details) $ in Millions		Dec. 31, 2018USD ($)		Dec. 31, 2017USD ($)
level 3 fair value assumptions [Line Items]
Available-for-sale Securities	[1],[2]	$ 31,442		$ 30,947	[3]
Loans Receivable, Fair Value Disclosure		163		196
Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Available-for-sale Securities		0		72
Loans Receivable, Fair Value Disclosure		163		196
Fair Value, Measurements, Recurring [Member]
level 3 fair value assumptions [Line Items]
Available-for-sale Securities		31,442	[4]	30,947	[5]
Loans Receivable, Fair Value Disclosure		163		196
Servicing Asset at Fair Value, Amount		1,983		1,710
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Available-for-sale Securities		0	[4]	72	[5]
Loans Receivable, Fair Value Disclosure		163		196
Servicing Asset at Fair Value, Amount		1,983		1,710
Fair Value, Measurements, Recurring [Member] | Valuation, Market Approach [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Derivative, Fair Value, Net		13	[6]	0	[7]
Loans Receivable, Fair Value Disclosure		5		4
Fair Value, Measurements, Recurring [Member] | Valuation, Income Approach [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Loans Receivable, Fair Value Disclosure		158		192
Servicing Asset at Fair Value, Amount		$ 1,983		1,710
Asset-backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Valuation, Market Approach [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Available-for-sale Securities				8
Other Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member] | Valuation, Cost Approach [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Available-for-sale Securities				5
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Fair Value, Measurements, Recurring [Member] | Valuation, Market Approach [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Available-for-sale Securities				$ 59
Pull Through Rate [Member] | Fair Value, Measurements, Recurring [Member] | Valuation, Market Approach [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Derivative Asset (Liability) Net, Measurement Input		0.41		0.41
Pull Through Rate [Member] | Fair Value, Measurements, Recurring [Member] | Valuation, Market Approach [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Derivative Asset (Liability) Net, Measurement Input		1		1
Pull Through Rate [Member] | Fair Value, Measurements, Recurring [Member] | Valuation, Market Approach [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Derivative Asset (Liability) Net, Measurement Input		0.81		0.81
MSR Value [Member] | Fair Value, Measurements, Recurring [Member] | Valuation, Market Approach [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Derivative Asset (Liability) Net, Measurement Input		0.0011		0.0041
MSR Value [Member] | Fair Value, Measurements, Recurring [Member] | Valuation, Market Approach [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Derivative Asset (Liability) Net, Measurement Input		0.0165		0.0190
MSR Value [Member] | Fair Value, Measurements, Recurring [Member] | Valuation, Market Approach [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Derivative Asset (Liability) Net, Measurement Input		0.0108		0.0113
Measurement Input, Credit Spread [Member] | Fair Value, Measurements, Recurring [Member] | Valuation, Income Approach [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Loans Held-For-Investment, Measurement Input		0		0.0062
Servicing Asset, Measurement Input		0		0.01
Measurement Input, Credit Spread [Member] | Fair Value, Measurements, Recurring [Member] | Valuation, Income Approach [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Loans Held-For-Investment, Measurement Input		0.0250		0.0784
Servicing Asset, Measurement Input		1.16		1.25
Measurement Input, Credit Spread [Member] | Fair Value, Measurements, Recurring [Member] | Valuation, Income Approach [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Loans Held-For-Investment, Measurement Input		0.0164		0.0215
Servicing Asset, Measurement Input		0.02		0.04
Measurement Input, Prepayment Rate [Member] | Fair Value, Measurements, Recurring [Member] | Valuation, Income Approach [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Loans Held-For-Investment, Measurement Input		0.07		0.02
Servicing Asset, Measurement Input		0.06		0.06
Measurement Input, Prepayment Rate [Member] | Fair Value, Measurements, Recurring [Member] | Valuation, Income Approach [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Loans Held-For-Investment, Measurement Input		0.22		0.34
Servicing Asset, Measurement Input		0.30		0.30
Measurement Input, Prepayment Rate [Member] | Fair Value, Measurements, Recurring [Member] | Valuation, Income Approach [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Loans Held-For-Investment, Measurement Input		0.12		0.11
Servicing Asset, Measurement Input		0.13		0.13
Measurement Input, Default Rate [Member] | Fair Value, Measurements, Recurring [Member] | Valuation, Income Approach [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Loans Held-For-Investment, Measurement Input		0		0
Measurement Input, Default Rate [Member] | Fair Value, Measurements, Recurring [Member] | Valuation, Income Approach [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Loans Held-For-Investment, Measurement Input		0.01		0.05
Measurement Input, Default Rate [Member] | Fair Value, Measurements, Recurring [Member] | Valuation, Income Approach [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Loans Held-For-Investment, Measurement Input		0.006		0.007
[1]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities available for sale to Other assets. Reclassifications have been made to previously reported amounts for comparability.
[2]	Includes securities AFS pledged as collateral where counterparties have the right to sell or repledge the collateral of $222 million and $223 million at December?31, 2018 and December?31, 2017, respectively.
[3]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability . See Note 11 , "Other Assets," for additional information.
[4]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability . See Note 11
[5]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability . See Note 11
[6]	Amount represents the net of IRLC assets and liabilities and includes the derivative liability associated with the Company’s sale of Visa shares. Refer to the “Trading Liabilities and Derivative Instruments” section in this Note for a discussion of valuation assumptions related to the Visa
[7]	Amount represents the net of IRLC assets and liabilities and includes the derivative liability associated with the Company’s sale of Visa shares. Refer to the “Trading Liabilities and Derivative Instruments” section in this Note for a discussion of valuation assumptions related to the Visa

Reconciliation of the Beginning

Reconciliation of the Beginning and Ending Balances for Fair Valued Assets and Liabilities Measured on a Recurring Basis Using Significant Unobservable Inputs (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Derivative contracts, net [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	$ 13		$ 0		$ 6
Included in earnings	65	[1]	185	[2]
OCI	0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	0		0
Sales	0		0
Settlements	11		0
Transfers to other balance sheet line items	63		191
Transfers into Level 3	0		0
Transferred Out of Level 3 in The Fair Value Hierarchy	0		0
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	18		12
US States and Political Subdivisions Debt Securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value			0		4
Included in earnings			0
OCI			0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases			0
Sales			0
Settlements			(4)
Transfers to other balance sheet line items			0
Transfers into Level 3			0
Transferred Out of Level 3 in The Fair Value Hierarchy			0
Mortgage-backed Securities, Issued by Private Enterprises [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	0		59		74
Included in earnings	0		(1)	[3]
OCI	0		1	[4]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	0		0
Sales	0		0
Settlements	(2)		(15)
Transfers to other balance sheet line items	0		0
Transfers into Level 3	0		0
Transferred Out of Level 3 in The Fair Value Hierarchy	(57)		0
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)			(1)
Asset-backed Securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	0		8		10
Included in earnings	0		0
OCI	0		1	[4]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	0		0
Sales	0		0
Settlements	(1)		(3)
Transfers to other balance sheet line items	0		0
Transfers into Level 3	0		0
Transferred Out of Level 3 in The Fair Value Hierarchy	(7)		0
Corporate Debt Securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	0		5		5
Included in earnings	0		0
OCI	0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	0		0
Sales	0		0
Settlements	0		0
Transfers to other balance sheet line items	0		0
Transfers into Level 3	0		0
Transferred Out of Level 3 in The Fair Value Hierarchy	(5)		0
Available-for-sale Securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	0		72		93
Included in earnings	0		(1)	[3]
OCI	0		2	[4]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	0		0
Sales	0		0
Settlements	(3)		(22)
Transfers to other balance sheet line items	0		0
Transfers into Level 3	0		0
Transferred Out of Level 3 in The Fair Value Hierarchy	(69)		0
Residential Mortgage, Loans Held For Sale [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value			0		12
Included in earnings			0
OCI			0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases			0
Sales			(25)
Settlements			(1)
Transfers to other balance sheet line items			4
Transfers into Level 3			26
Transferred Out of Level 3 in The Fair Value Hierarchy			(8)
Loans Held-For-Investment [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	163		196		$ 222
Included in earnings	1	[5]	0	[6]
OCI	0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	0		0
Sales	0		0
Settlements	(36)		(34)
Transfers to other balance sheet line items	0		3
Transfers into Level 3	2		5
Transferred Out of Level 3 in The Fair Value Hierarchy	0		0
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	$ (1)		$ (1)
[1]	Includes issuances, fair value changes, and expirations. Amount related to residential IRLC s is recognized in Mortgage related income, amount related to commercial IRLC s is recognized in Commercial real estate related income, and amount related to Visa derivative liability is recognized in Other noninterest expense. Included $18 million in earnings during the year ended December 31, 2018 , related to changes in unrealized gains on net derivative instruments still held at December 31, 2018
[2]	Includes issuances, fair value changes, and expirations. Amount related to residential IRLC s is recognized in Mortgage related income, amount related to commercial IRLC s is recognized in Commercial real estate related income, and amount related to Visa derivative liability is recognized in Other noninterest expense. Included $12 million in earnings during the year ended December 31, 2017 , related to changes in unrealized gains on net derivative instruments still held at December 31, 2017
[3]	Included $1 million in earnings during year ended December 31, 2017 , related to changes in unrealized losses on securities AFS still held at December 31, 2017
[4]	Amounts recognized in OCI
[5]	Amounts are generally included in Mortgage related income; however, the mark on certain fair value loans is included in Other noninterest income. Included less than $1 million in earnings during the year ended December 31, 2018 , related to changes in unrealized losses on LHFI still held at December 31, 2018
[6]	Amounts are generally included in Mortgage related income; however, the mark on certain fair value loans is included in Other noninterest income. Included $1 million in earnings during the year ended December 31, 2017 , related to changes in unrealized losses on LHFI still held at December 31, 2017

Carrying Value of Those Assets

Carrying Value of Those Assets Measured at Fair Value on a Non-Recurring Basis (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Transfer of Portfolio Loans and Leases to Held-for-sale	$ 532	$ 288	$ 360
Allowance for Loan and Lease Losses, Write-offs	453	491	$ 591
Loans Held-For-Sale [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	47	13
Asset Impairment Charges	(1)	0
Loans Held-For-Sale [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	0	0
Loans Held-For-Sale [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	47	13
Loans Held-For-Sale [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	0	0
Loans Held-For-Investment [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	63	49
Asset Impairment Charges	0	0
Loans Held-For-Investment [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	0	0
Loans Held-For-Investment [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	0	0
Loans Held-For-Investment [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	63	49
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	19	24
Asset Impairment Charges	(4)	(4)
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	0	0
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	0	1
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	19	23
Other Assets [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	67	53
Asset Impairment Charges		(43)
Assets, Fair Value Adjustment	24
Other Assets [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	0	0
Other Assets [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	47	4
Other Assets [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	20	49
Nonmarketable Equity Securities [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Adjustment	30
Other Assets [Member] | Building [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset Impairment Charges	$ (5)	$ (10)

Carrying Amounts and Fair Value

Carrying Amounts and Fair Values of the Company's Financial Instruments (Detail) - USD ($)		Dec. 31, 2018		Dec. 31, 2017
Financial assets
Debt Securities, Trading, and Equity Securities, FV-NI	[1]	$ 5,506,000,000		$ 5,093,000,000
Available-for-sale Securities	[2],[3]	31,442,000,000		30,947,000,000	[4]
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group	[5]	1,468,000,000		2,290,000,000
Loans Held-for-sale, Fair Value Disclosure		1,200,000,000		1,600,000,000
Loans and Leases Receivable, Excluding Fair Value Loans		151,676,000,000		142,985,000,000
Loans Receivable, Fair Value Disclosure		163,000,000		196,000,000
Other Assets	[2],[6]	8,991,000,000		9,099,000,000
Financial liabilities
Deposits		162,589,000,000		160,780,000,000
Long-term Debt	[7],[8]	15,072,000,000		9,785,000,000
Long-term Debt, Fair Value		289,000,000		530,000,000
Fair Value, Inputs, Level 1 [Member]
Financial assets
Cash and Cash Equivalents, Fair Value Disclosure		7,495,000,000		6,912,000,000
Debt Securities, Trading, and Equity Securities, FV-NI		521,000,000		608,000,000
Available-for-sale Securities		4,211,000,000		4,331,000,000
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group		0		0
Loans Held-for-sale, Fair Value Disclosure		0		0
Loans and Leases Receivable, Excluding Fair Value Loans		0		0
Loans Receivable, Fair Value Disclosure		0		0
Other Assets		0		0
Other Assets, Fair Value Disclosure		95,000,000	[9]	56,000,000	[10]
Financial liabilities
Time Deposits		0		0
Short-term Debt, Fair Value		0		0
Long-term Debt		0		0
Long-term Debt, Fair Value		0		0
Trading liabilities		925,000,000		769,000,000
Fair Value, Inputs, Level 2 [Member]
Financial assets
Cash and Cash Equivalents, Fair Value Disclosure		0		0
Debt Securities, Trading, and Equity Securities, FV-NI		4,965,000,000		4,469,000,000
Available-for-sale Securities		27,231,000,000		26,544,000,000
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group		261,000,000		662,000,000
Loans Held-for-sale, Fair Value Disclosure		1,178,000,000		1,577,000,000
Loans and Leases Receivable, Excluding Fair Value Loans		0		0
Loans Receivable, Fair Value Disclosure		0		0
Other Assets		0		0
Other Assets, Fair Value Disclosure		0		0
Financial liabilities
Time Deposits		15,106,000,000		11,906,000,000
Short-term Debt, Fair Value		8,772,000,000		4,781,000,000
Long-term Debt		13,024,000,000		8,304,000,000
Long-term Debt, Fair Value		289,000,000		530,000,000
Trading liabilities		672,000,000		498,000,000
Fair Value, Inputs, Level 3 [Member]
Financial assets
Cash and Cash Equivalents, Fair Value Disclosure		0		0
Debt Securities, Trading, and Equity Securities, FV-NI		20,000,000		16,000,000
Available-for-sale Securities		0		72,000,000
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group		30,000,000		54,000,000
Loans Held-for-sale, Fair Value Disclosure		0		0
Loans and Leases Receivable, Excluding Fair Value Loans		148,167,000,000		141,379,000,000
Loans Receivable, Fair Value Disclosure		163,000,000		196,000,000
Other Assets		630,000,000	[9]	418,000,000	[10]
Other Assets, Fair Value Disclosure		0		0
Financial liabilities
Time Deposits		0		0
Short-term Debt, Fair Value		0		0
Long-term Debt		1,705,000,000		1,058,000,000
Long-term Debt, Fair Value		0		0
Trading liabilities		7,000,000		16,000,000
Reported Value Measurement [Member]
Financial assets
Cash and Cash Equivalents, Fair Value Disclosure		7,495,000,000		6,912,000,000
Debt Securities, Trading, and Equity Securities, FV-NI		5,506,000,000		5,093,000,000
Available-for-sale Securities		31,442,000,000		30,947,000,000
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group		290,000,000		713,000,000
Loans Held-for-sale, Fair Value Disclosure		1,178,000,000		1,577,000,000
Loans and Leases Receivable, Excluding Fair Value Loans		150,061,000,000		141,250,000,000
Loans Receivable, Fair Value Disclosure		163,000,000		196,000,000
Other Assets		630,000,000	[9]	418,000,000	[10]
Other Assets, Fair Value Disclosure		95,000,000	[9]	56,000,000	[10]
Financial liabilities
Time Deposits		15,355,000,000		12,076,000,000
Short-term Debt, Fair Value		8,772,000,000		4,781,000,000
Long-term Debt		14,783,000,000		9,255,000,000
Long-term Debt, Fair Value		289,000,000		530,000,000
Trading liabilities		1,604,000,000		1,283,000,000
Estimate of Fair Value, Fair Value Disclosure [Member]
Financial assets
Cash and Cash Equivalents, Fair Value Disclosure		7,495,000,000		6,912,000,000
Debt Securities, Trading, and Equity Securities, FV-NI		5,506,000,000		5,093,000,000
Available-for-sale Securities		31,442,000,000		30,947,000,000
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group		291,000,000		716,000,000
Loans Held-for-sale, Fair Value Disclosure		1,178,000,000		1,577,000,000
Loans and Leases Receivable, Excluding Fair Value Loans		148,167,000,000		141,379,000,000
Loans Receivable, Fair Value Disclosure		163,000,000		196,000,000
Other Assets		630,000,000	[9]	418,000,000	[10]
Other Assets, Fair Value Disclosure		95,000,000	[9]	56,000,000	[10]
Financial liabilities
Time Deposits		15,106,000,000		11,906,000,000
Short-term Debt, Fair Value		8,772,000,000		4,781,000,000
Long-term Debt		14,729,000,000		9,362,000,000
Long-term Debt, Fair Value		289,000,000		530,000,000
Trading liabilities		1,604,000,000		1,283,000,000
Brokered Time Deposits [Member] | Fair Value, Inputs, Level 1 [Member]
Financial liabilities
Deposits		0		0
Deposits, Fair Value Disclosure		0		0
Brokered Time Deposits [Member] | Fair Value, Inputs, Level 2 [Member]
Financial liabilities
Deposits		615,000,000		725,000,000
Deposits, Fair Value Disclosure		403,000,000		236,000,000
Brokered Time Deposits [Member] | Fair Value, Inputs, Level 3 [Member]
Financial liabilities
Deposits		0		0
Deposits, Fair Value Disclosure		0		0
Brokered Time Deposits [Member] | Reported Value Measurement [Member]
Financial liabilities
Deposits		642,000,000		749,000,000
Deposits, Fair Value Disclosure		403,000,000		236,000,000
Brokered Time Deposits [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Financial liabilities
Deposits		615,000,000		725,000,000
Deposits, Fair Value Disclosure		$ 403,000,000		$ 236,000,000
[1]	Includes trading securities pledged as collateral where counterparties have the right to sell or repledge the collateral of $1,442 million and $1,086 million at December?31, 2018 and December?31, 2017, respectively.
[2]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities available for sale to Other assets. Reclassifications have been made to previously reported amounts for comparability.
[3]	Includes securities AFS pledged as collateral where counterparties have the right to sell or repledge the collateral of $222 million and $223 million at December?31, 2018 and December?31, 2017, respectively.
[4]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability . See Note 11 , "Other Assets," for additional information.
[5]	Includes $1.2 billion and $1.6 billion of LHFS measured at fair value at December 31, 2018 and 2017
[6]	Beginning October 1, 2018, the Company reclassified software and related accumulated amortization previously presented in Other assets to Premises, property, and equipment, net. Reclassifications have been made to previously reported amounts for comparability.
[7]	Includes $289 million and $530 million of long-term debt measured at fair value at December 31, 2018 and 2017
[8]	Includes debt of consolidated VIEs of $161 million and $189 million at December?31, 2018 and December?31, 2017, respectively.
[9]	Other financial assets recorded at amortized cost consist of FHLB
[10]	Other financial assets recorded at amortized cost consist of FHLB

Contingencies - Additional Info

Contingencies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018USD ($)
Document Period End Date	Dec. 31, 2018
Minimum [Member]
Aggregate range of reasonably possible losses on legal matters in excess of the accrued liability	$ 0
Maximum [Member]
Aggregate range of reasonably possible losses on legal matters in excess of the accrued liability	150,000,000
LR Trust v. SunTrust Banks, Inc., et al. [Member]
Loss Contingency, Damages Awarded, Value	$ 585,000

Business Segment Reporting (Det

Business Segment Reporting (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)segments		Dec. 31, 2017USD ($)	[1],[2]	Dec. 31, 2016USD ($)	[3],[4]
Number of Operating Segments | segments	2
Average Total Loans Held for Investment	$ 145,714		$ 144,216		$ 141,118
Average Total Deposits	159,768		159,549		154,189
Average Total Assets	207,277		204,931		199,004
Average Total Liabilities	183,067		180,630		174,936
Average Total Equity	24,210		24,301		24,068
Interest Income (Expense), Net	5,987		5,633		5,221
Fully Taxable Equivalent Adjustment	88		145		138
Net Interest Income Including Fully Taxable Equivalent Adjustment	6,075	[5]	5,778	[6]	5,359	[7]
Provision for Loan, Lease, and Other Losses	208	[8]	409	[9]	444	[10]
Net Interest Income After Provision For Credit Losses and Taxable Equivalent Adjustment	5,867		5,369		4,915
Noninterest Income	3,226		3,354		3,383
Noninterest Expense	5,673		5,764		5,468
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	3,420		2,959		2,830
Income Tax Expense (Benefit) Including Fully Taxable Equivalent Adjustment Reversal	636	[11]	677	[12]	943	[13]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	2,784		2,282		1,887
Net Income (Loss) Attributable to Noncontrolling Interest	9		9		9
Net Income (Loss) Attributable to Parent	2,775		2,273		1,878
Consumer [Member]
Average Total Loans Held for Investment	75,427		73,578		70,455
Average Total Deposits	111,235		109,298		105,365
Average Total Assets	85,509		83,278		79,971
Average Total Liabilities	112,173		110,271		106,374
Average Total Equity	0		0		0
Interest Income (Expense), Net	4,235		3,906		3,636
Fully Taxable Equivalent Adjustment	0		0		0
Net Interest Income Including Fully Taxable Equivalent Adjustment	4,235	[5]	3,906	[6]	3,636	[7]
Provision for Loan, Lease, and Other Losses	148	[8]	366	[9]	159	[10]
Net Interest Income After Provision For Credit Losses and Taxable Equivalent Adjustment	4,087		3,540		3,477
Noninterest Income	1,804		1,905		2,067
Noninterest Expense	4,017		3,982		3,938
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	1,874		1,463		1,606
Income Tax Expense (Benefit) Including Fully Taxable Equivalent Adjustment Reversal	424	[11]	529	[12]	592	[13]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	1,450		934		1,014
Net Income (Loss) Attributable to Noncontrolling Interest	0		0		0
Net Income (Loss) Attributable to Parent	1,450		934		1,014
Wholesale [Member]
Average Total Loans Held for Investment	70,200		69,394		69,287
Average Total Deposits	48,675		50,155		48,782
Average Total Assets	84,413		83,091		83,168
Average Total Liabilities	55,098		55,762		54,457
Average Total Equity	0		0		0
Interest Income (Expense), Net	2,184		2,029		1,812
Fully Taxable Equivalent Adjustment	86		142		136
Net Interest Income Including Fully Taxable Equivalent Adjustment	2,270	[5]	2,171	[6]	1,948	[7]
Provision for Loan, Lease, and Other Losses	60	[8]	39	[9]	282	[10]
Net Interest Income After Provision For Credit Losses and Taxable Equivalent Adjustment	2,210		2,132		1,666
Noninterest Income	1,534		1,573		1,325
Noninterest Expense	1,720		1,727		1,507
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	2,024		1,978		1,484
Income Tax Expense (Benefit) Including Fully Taxable Equivalent Adjustment Reversal	479	[11]	736	[12]	555	[13]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	1,545		1,242		929
Net Income (Loss) Attributable to Noncontrolling Interest	0		0		0
Net Income (Loss) Attributable to Parent	1,545		1,242		929
Corporate Other [Member]
Average Total Loans Held for Investment	89		1,247		1,379
Average Total Deposits	216		160		115
Average Total Assets	35,630		35,931		33,425
Average Total Liabilities	16,100		14,626		14,179
Average Total Equity	0		0		0
Interest Income (Expense), Net	(190)		14		160
Fully Taxable Equivalent Adjustment	2		3		2
Net Interest Income Including Fully Taxable Equivalent Adjustment	(188)	[5]	17	[6]	162	[7]
Provision for Loan, Lease, and Other Losses	0	[8]	4	[9]	3	[10]
Net Interest Income After Provision For Credit Losses and Taxable Equivalent Adjustment	(188)		13		159
Noninterest Income	57		73		137
Noninterest Expense	(42)		74		38
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(89)		12		258
Income Tax Expense (Benefit) Including Fully Taxable Equivalent Adjustment Reversal	(61)	[11]	(292)	[12]	70	[13]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(28)		304		188
Net Income (Loss) Attributable to Noncontrolling Interest	9		9		9
Net Income (Loss) Attributable to Parent	(37)		295		179
Reconciling Items
Average Total Loans Held for Investment	(2)		(3)		(3)
Average Total Deposits	(358)		(64)		(73)
Average Total Assets	1,725		2,631		2,440
Average Total Liabilities	(304)		(29)		(74)
Average Total Equity	24,210		24,301		24,068
Interest Income (Expense), Net	(242)		(316)		(387)
Fully Taxable Equivalent Adjustment	0		0		0
Net Interest Income Including Fully Taxable Equivalent Adjustment	(242)	[5]	(316)	[6]	(387)	[7]
Provision for Loan, Lease, and Other Losses	0	[8]	0	[9]	0	[10]
Net Interest Income After Provision For Credit Losses and Taxable Equivalent Adjustment	(242)		(316)		(387)
Noninterest Income	(169)		(197)		(146)
Noninterest Expense	(22)		(19)		(15)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(389)		(494)		(518)
Income Tax Expense (Benefit) Including Fully Taxable Equivalent Adjustment Reversal	(206)	[11]	(296)	[12]	(274)	[13]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(183)		(198)		(244)
Net Income (Loss) Attributable to Noncontrolling Interest	0		0		0
Net Income (Loss) Attributable to Parent	$ (183)		$ (198)		$ (244)
[1]	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.
[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]	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]	Presented on a matched maturity funds transfer price basis for the segments.
[6]	Presented on a matched maturity funds transfer price basis for the segments.
[7]	Presented on a matched maturity funds transfer price basis for the segments.
[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]	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.
[11]	Includes regular provision for income taxes as well as FTE income and tax credit adjustment reversals.
[12]	Includes regular provision for income taxes as well as FTE income and tax credit adjustment reversals.
[13]	Includes regular provision for income taxes as well as FTE income and tax credit adjustment reversals.

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss), Debt Securities, Available-for-sale, Adjustment, after Tax		$ (357)	$ (1)		$ (62)	$ 135
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax		(368)	(244)		(157)	87
Accumulated Other Comprehensive Income (Loss), Brokered Time Deposits, net of tax		1	(1)		(1)	0
Accumulated Other Comprehensive Income (Loss), Long-term Debt, Net of Tax		(1)	(4)		(7)	0
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax		(695)	(570)		(594)	(682)
Accumulated Other Comprehensive Income (Loss), Net of Tax		(1,420)	(820)		(821)	$ (460)
Cumulative Effect of Credit Risk Adjustment	[1]				0
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income	[2]	(5)
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax		(385)	(7)		(194)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax		(123)	(31)		(91)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Brokered Time Deposits Arising During Period, Net of Tax		2	0		(1)
Other Comprehensive Income (Loss), Unrealized Credit Risk Gain (Loss) on Long-term Debt Arising During Period, Net of Tax		4	3		(2)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax		(56)	11		76
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		(558)	(24)		(212)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax		(1)	68		(3)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax		55	(56)		(153)
Other Comprehensive Income (Loss), Reclassification from AOCI on Brokered Time Deposits, Net of Tax		0	0		0
Other Comprehensive Income Loss Reclassfication Adjustment From AOCI on Long Term Debt, Net of Tax		0	0		0
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax		58	13		12
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		112	25		(144)
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax		(386)	61	[3]	(197)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax		(68)	(87)	[3]	(244)
Other Comprehensive Income (Loss), Brokered Time Deposits, Net of Tax		2	0	[3]	(1)
Other Comprehensive Income (Loss), Long Term Debt, Adjustment, Net of Tax		(4)	(3)	[3]	2
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax		(2)	(24)	[3]	(88)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent		(446)	$ 1	[3]	(356)
AOCI Attributable to Parent [Member]
Cumulative Effect of Credit Risk Adjustment	[1],[4]				$ (5)
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income	[2],[5]	(154)
Available-for-sale Securities [Member] | AOCI Attributable to Parent [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income	[5]	30
Derivative [Member] | AOCI Attributable to Parent [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income	[5]	(56)
Brokered Time Deposits [Member] | AOCI Attributable to Parent [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income	[5]	0
Long-term Debt [Member] | AOCI Attributable to Parent [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income	[5]	(1)
Defined Benefit Plan [Member] | AOCI Attributable to Parent [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income	[5]	$ (127)
[1]	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 23
[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
[3]	Net of tax amounts include the stranded tax effects resulting from the 2017 Tax Act . See Note 1
[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
[5]	Related to the Company's early adoption of ASU 2018-02 beginning January 1, 2018. See Note 1

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income Reclassifications out of AOCI (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax		$ (1)	$ 108	$ (4)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax		0	(40)	1
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax		(1)	68	(3)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax		72	(89)	(244)
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Tax		(17)	33	91
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax		55	(56)	(153)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax		(6)	(6)	(6)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Actuarial Gain (Loss), Before Tax		22	25	(25)
Deferred losses related to NCF Retirement Plan settlement	[1]	60	0	0
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax		76	19	19
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax		(18)	(6)	(7)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax		58	13	12
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		$ 112	$ 25	$ (144)
[1]	Related to the Company's NCF Retirement Plan settlement in the fourth quarter of 2018. See Note 17

Statements of Income_(Loss) - P

Statements of Income/(Loss) - Parent Company Only (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Interest and Dividend Income, Securities, Available-for-sale	[1],[2]	$ 849	$ 756		$ 636
Interest Expense, Long-term Debt		375	288		260
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) Attributable to Parent		2,775	2,273	[3],[4]	1,878	[5],[6]
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent		(446)	1	[7]	(356)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent		2,329	2,274	[7]	1,522
Parent Company [Member]
Interest and Dividend Income, Securities, Available-for-sale	[8]	2,380	1,414		1,300
Interest and Fee Income, Other Loans		30	25		15
Interest Income, Deposits with Other Federal Home Loan Banks		25	22		12
Other Income		34	5		2
Revenues		2,469	1,466		1,329
Interest Expense, Short-term Borrowings		6	4		2
Interest Expense, Long-term Debt		161	137		140
Labor and Related Expense	[9]	40	103		57
Fees and Commission Expense		9	12		12
Other Expenses		19	33		24
Operating Expenses		235	289		235
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest		2,234	1,177		1,094
Income Tax Expense (Benefit)		20	72		59
Income (Loss) Before Equity in Undistributed Earnings of Subsidiaries		2,254	1,249		1,153
Equity in Undistributed Earnings of Subsidiaries		521	1,024		725
Net Income (Loss) Attributable to Parent		2,775	2,273		1,878
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent		(446)	1		(356)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent		$ 2,329	$ 2,274		$ 1,522
[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]	Net of tax amounts include the stranded tax effects resulting from the 2017 Tax Act . See Note 1
[8]	Substantially all dividend income is from subsidiaries (primarily the Bank).
[9]	Includes incentive compensation allocations between the Parent Company and subsidiaries.

Balance Sheets - Parent Company

Balance Sheets - Parent Company Only (Details) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016	Dec. 31, 2015
Assets [Abstract]
Cash and Due from Banks		$ 5,791	$ 5,349
Interest-bearing Deposits in Banks and Other Financial Institutions		25	25
Cash and cash equivalents		7,495	6,912		$ 6,423	$ 5,599
Debt Securities, Trading, and Equity Securities, FV-NI	[1]	5,506	5,093
Available-for-sale Securities	[2],[3]	31,442	30,947	[4]
Goodwill		6,331	6,331		6,337
Other Assets	[2],[5]	8,991	9,099
Total assets		215,543	205,962
Liabilities and Shareholders' Equity
Long-term Debt	[6],[7]	15,072	9,785
Other Liabilities		3,226	4,179
Total liabilities		191,263	180,808
Preferred Stock, Value, Outstanding		2,025	2,475		1,225
Common Stock, Value, Outstanding		553	550
Additional Paid in Capital		9,022	9,000
Retained Earnings (Accumulated Deficit)		19,522	17,540
Treasury Stock, Value	[8]	(5,422)	(3,591)
Accumulated Other Comprehensive Income (Loss), Net of Tax		(1,420)	(820)		(821)	(460)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		24,280	25,154		23,618	23,437
Liabilities and Equity		215,543	205,962
Parent Company [Member]
Assets [Abstract]
Cash and Due from Banks		599	701
Interest-bearing Deposits Held at SunTrust		913	2,144
Interest-bearing Deposits in Banks and Other Financial Institutions		24	24
Cash and cash equivalents		1,536	2,869		$ 1,684	$ 2,615
Debt Securities, Trading, and Equity Securities, FV-NI		12	0
Available-for-sale Securities		98	123
Due from Affiliates		1,261	1,218
Equity Method Investments		24,630	24,590
Investments in and Advances to Affiliates, Amount of Equity		1,457	1,423
Goodwill		211	211
Other Assets		686	547
Total assets		29,891	30,981
Liabilities and Shareholders' Equity
Due to Affiliate, Current		5	205
Short-term Bank Loans and Notes Payable		354	350
Long-term Debt		4,536	4,466
Other Liabilities		819	909
Total liabilities		5,714	5,930
Preferred Stock, Value, Outstanding		2,025	2,475
Common Stock, Value, Outstanding		553	550
Additional Paid in Capital		9,022	9,000
Retained Earnings (Accumulated Deficit)		19,522	17,540
Treasury Stock, Value		(5,525)	(3,694)
Accumulated Other Comprehensive Income (Loss), Net of Tax		(1,420)	(820)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		24,177	25,051
Liabilities and Equity		$ 29,891	$ 30,981
[1]	Includes trading securities pledged as collateral where counterparties have the right to sell or repledge the collateral of $1,442 million and $1,086 million at December?31, 2018 and December?31, 2017, respectively.
[2]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities available for sale to Other assets. Reclassifications have been made to previously reported amounts for comparability.
[3]	Includes securities AFS pledged as collateral where counterparties have the right to sell or repledge the collateral of $222 million and $223 million at December?31, 2018 and December?31, 2017, respectively.
[4]	Beginning January 1, 2018, the Company reclassified equity securities previously presented in Securities AFS to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability . See Note 11 , "Other Assets," for additional information.
[5]	Beginning October 1, 2018, the Company reclassified software and related accumulated amortization previously presented in Other assets to Premises, property, and equipment, net. Reclassifications have been made to previously reported amounts for comparability.
[6]	Includes $289 million and $530 million of long-term debt measured at fair value at December 31, 2018 and 2017
[7]	Includes debt of consolidated VIEs of $161 million and $189 million at December?31, 2018 and December?31, 2017, respectively.
[8]	Includes noncontrolling interest of $103 million and $103 million at December?31, 2018 and December?31, 2017, respectively.

Statements of Cash Flow - Paren

Statements of Cash Flow - Parent Company Only (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015
Net Income (Loss) Attributable to Parent	$ 2,775	$ 2,273	[1],[2]	$ 1,878	[3],[4]
Depreciation, Amortization and Accretion, Net	716	727		725
Deferred Income Tax Expense (Benefit)	(87)	344		111
Stock Option Compensation And Amortization Of Restricted Stock Compensation	140	160		126
Debt and Equity Securities, Gain (Loss)	(1)	108		(4)
Net decrease/(increase) in other assets	(340)	348	[5]	(627)	[5]
Net increase/(decrease) in Other Operating Liabilities	(797)	(911)		(284)
Net Cash Provided by (Used in) Operating Activities, Continuing Operations	2,569	5,622		(518)
Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale	(3,690)	(4,186)		(5,108)
Proceeds from Sale of Available-for-sale Securities	(2,096)	(2,854)		(197)
Payments to Acquire Available-for-sale Securities	6,389	8,299		8,610
Net Cash Provided by (Used in) Investing Activities, Continuing Operations	10,151	2,998		11,307
Proceeds from Issuance of Long-term Debt	6,944	2,844		6,705
Repayments of Long-term Debt	(1,274)	(4,562)		(3,231)
Proceeds from Issuance of Preferred Stock and Preference Stock	0	1,239		0
Payments for Repurchase of Preferred Stock and Preference Stock	(450)	0		0
Payments for Repurchase of Common Stock	(1,910)	(1,314)		(806)
Payments for Repurchase of Warrants	0	0		(24)
Payments Related to Tax Withholding for Share-based Compensation	(45)	(39)		(48)
Proceeds from the exercise of stock options	36	21		25
Net Cash Provided by (Used in) Financing Activities, Continuing Operations	8,165	(2,135)		12,649
Cash and Cash Equivalents, Period Increase (Decrease)	583	489		824
Cash and cash equivalents	7,495	6,912		6,423		$ 5,599
Interest Paid, Including Capitalized Interest, Operating and Investing Activities	1,151	730		559
Parent Company [Member]
Net Income (Loss) Attributable to Parent	2,775	2,273		1,878
Equity in Undistributed Earnings of Subsidiaries	(521)	(1,024)		(725)
Depreciation, Amortization and Accretion, Net	3	5		3
Deferred Income Tax Expense (Benefit)	8	5		11
Stock Option Compensation And Amortization Of Restricted Stock Compensation	0	0		3
Debt and Equity Securities, Gain (Loss)	0	(1)		0
Net decrease/(increase) in other assets	(158)	(15)		(129)
Net increase/(decrease) in Other Operating Liabilities	26	122		62
Net Cash Provided by (Used in) Operating Activities, Continuing Operations	2,133	1,365		1,103
Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale	23	38		49
Proceeds from Sale of Available-for-sale Securities	0	1		4
Payments to Acquire Available-for-sale Securities	0	(17)		(4)
Payments for (Proceeds from) Loans Receivable	43	(1,298)		889
Payments for (Proceeds from) Other Investing Activities	1	0		3
Net Cash Provided by (Used in) Investing Activities, Continuing Operations	(21)	1,320		(843)
Proceeds from (Repayments of) Short-term Debt	(196)	(211)		5
Proceeds from Issuance of Long-term Debt	929	9		2,005
Repayments of Long-term Debt	(873)	(482)		(1,784)
Proceeds from Issuance of Preferred Stock and Preference Stock	0	1,239		0
Payments for Repurchase of Preferred Stock and Preference Stock	(450)	0		0
Payments for Repurchase of Common Stock	(1,910)	(1,314)		(806)
Payments for Repurchase of Warrants	0	0		(24)
Payments of Dividends	(936)	(723)		(564)
Payments Related to Tax Withholding for Share-based Compensation	(45)	(39)		(48)
Proceeds from the exercise of stock options	36	21		25
Net Cash Provided by (Used in) Financing Activities, Continuing Operations	(3,445)	(1,500)		(1,191)
Cash and Cash Equivalents, Period Increase (Decrease)	(1,333)	1,185		(931)
Cash and cash equivalents	1,536	2,869		1,684		$ 2,615
Income Taxes (Paid)/Received by Parent Company	(105)	414		812
Income Taxes Received From (Paid To) Subsidiaries	101	(489)		(886)
Income Taxes Paid, Net	(4)	(75)		(74)
Interest Paid, Including Capitalized Interest, Operating and Investing Activities	$ 164	$ 140		$ 135
[1]	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.
[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]	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]	ertain prior period amounts have been revised to reflect the impact of the Company’s adoption of ASU 2016-15. See Note 1

Subsequent Event (Details)

Subsequent Event (Details)	Feb. 07, 2019shares
Subsequent Event [Member]
Subsequent Event [Line Items]
Business Combination, Equity Interests Received Per Share	1.295