Citizens Financial (CFG) 10-Q 8 May 19 2019 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2019	May 01, 2019
Document and Entity Information [Abstract]
Document Type	10-Q
Entity Central Index Key	0000759944
Amendment Flag	false
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Trading Symbol	CFG
Entity Registrant Name	CITIZENS FINANCIAL GROUP INC/RI
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding		458,355,574

CONSOLIDATED BALANCE SHEETS (UN

CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Millions		Mar. 31, 2019	Dec. 31, 2018
ASSETS:
Cash and due from banks		$ 923	$ 1,081
Interest-bearing cash and due from banks		1,513	2,993
Interest-bearing deposits in banks		167	148
Debt securities available for sale, at fair value (including $423 and $363 pledged to creditors, respectively)	[1]	21,504	19,895
Debt securities held to maturity (fair value of $3,267 and $4,041, respectively)		3,345	4,165
Equity securities, at fair value		198	181
Equity securities, at cost		604	834
Loans held for sale, at fair value		1,186	1,219
Other loans held for sale		66	101
Loans and leases		117,615	116,660
Less: Allowance for loan and lease losses		(1,245)	(1,242)
Net loans and leases		116,370	115,418
Derivative assets		465	317
Premises and equipment, net		746	791
Bank-owned life insurance		1,705	1,698
Goodwill		7,040	6,923
Due from broker		92	0
Other assets		5,418	4,754
TOTAL ASSETS		161,342	160,518
Deposits:
Noninterest-bearing		28,383	29,458
Interest-bearing		95,533	90,117
Total deposits		123,916	119,575
Federal funds purchased and securities sold under agreements to repurchase		668	1,156
Other short-term borrowed funds		11	161
Derivative liabilities		173	292
Deferred taxes, net		676	573
Long-term borrowed funds		11,725	15,925
Due to broker		93	0
Other liabilities		2,549	2,019
TOTAL LIABILITIES		139,811	139,701
Contingencies (refer to Note 12)
Preferred stock, $25.00 par value, authorized 100,000,000 shares:
Preferred stock, $25.00 par value, 100,000,000 shares authorized		1,132	840
Common stock:
$0.01 par value, 1,000,000,000 shares authorized; 567,752,493 shares issued and 461,116,723 shares outstanding at March 31, 2019 and 566,819,863 shares issued and 466,007,984 shares outstanding at December 31, 2018		6	6
Additional paid-in capital		18,847	18,815
Retained earnings		5,672	5,385
Treasury stock, at cost, 106,635,770 and 100,811,879 shares at March 31, 2019 and December 31, 2018, respectively		(3,333)	(3,133)
Accumulated other comprehensive loss		(793)	(1,096)
TOTAL STOCKHOLDERS’ EQUITY		21,531	20,817
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY		$ 161,342	$ 160,518
[1]	Includes only collateral pledged by the Company where counterparties have the right to sell or pledge the collateral.

CONSOLIDATED BALANCE SHEETS (_2

CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
ASSETS:
Securities held-to-maturity, fair value	$ 3,267	$ 4,041
STOCKHOLDERS’ EQUITY:
Preferred stock, par value (in dollars per share)	$ 25	$ 25
Preferred stock, authorized (in shares)	100,000,000	100,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, issued (in shares)	567,752,493	566,819,863
Common stock, outstanding (in shares)	461,116,723	466,007,984
Treasury stock (in shares)	106,635,770	100,811,879
Available-for-sale Securities
ASSETS:
Securities, pledged to creditors	$ 423	$ 363
Held-to-maturity Securities
ASSETS:
Securities held-to-maturity, fair value	$ 3,267	$ 4,041

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
INTEREST INCOME:
Interest and fees on loans and leases	$ 1,381	$ 1,146
Interest and fees on loans held for sale, at fair value	11	4
Interest and fees on other loans held for sale	4	4
Investment securities	166	168
Interest-bearing deposits in banks	8	6
Total interest income	1,570	1,328
INTEREST EXPENSE:
Deposits	287	145
Federal funds purchased and securities sold under agreements to repurchase	2	1
Other short-term borrowed funds	0	2
Long-term borrowed funds	121	89
Total interest expense	410	237
Net interest income	1,160	1,091
Provision for credit losses	85	78
Net interest income after provision for credit losses	1,075	1,013
NONINTEREST INCOME:
Service charges and fees	123	124
Card fees	59	61
Capital markets fees	54	39
Trust and investment services fees	47	40
Mortgage banking fees	43	25
Letter of credit and loan fees	33	30
Foreign exchange and interest rate products	36	27
Securities gains, net	8	8
Net impairment losses recognized in earnings on debt securities	(1)	(1)
Other income	26	18
Total noninterest income	428	371
NONINTEREST EXPENSE:
Salaries and employee benefits	509	470
Equipment and software expense	125	113
Outside services	110	99
Occupancy	83	81
Other operating expense	110	120
Total noninterest expense	937	883
Income before income tax expense	566	501
Income tax expense	127	113
NET INCOME	439	388
Net income available to common stockholders	$ 424	$ 381
Weighted-average common shares outstanding:
Basic (in Shares)	460,713,172	487,500,618
Diluted (in Shares)	462,520,680	489,266,826
Per common share information:
Basic earnings (in dollars per share)	$ 0.92	$ 0.78
Diluted earnings (in Dollars per Share)	$ 0.92	$ 0.78

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 439	$ 388
Other comprehensive income (loss):
Net unrealized derivative instrument gains (losses) arising during the periods, net of income taxes of $13 and ($18), respectively	39	(52)
Reclassification adjustment for net derivative losses included in net income, net of income taxes of $5 and $0, respectively	15	2
Net unrealized debt securities gains (losses) arising during the periods, net of income taxes of $80 and ($86), respectively	246	(272)
Other-than-temporary impairment not recognized in earnings on debt securities, net of income taxes of $0 and ($1), respectively	0	(1)
Reclassification of net debt securities gains to net income, net of income taxes of ($2) and ($2), respectively	(5)	(5)
Amortization of actuarial loss, net of income taxes of $2 and $1, respectively	3	3
Total other comprehensive income (loss), net of income taxes	298	(325)
Total comprehensive income	$ 737	$ 63

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net unrealized derivative instrument gains (losses) arising during the periods, tax	$ 13	$ (18)
Reclassification adjustment for net derivative losses included in net income, tax	5	0
Net unrealized debt securities gains (losses) arising during the periods, tax	80	(86)
Other-than-temporary impairment not recognized in earnings on debt securities, tax	0	(1)
Reclassification of net debt securities gains to net income, tax	(2)	(2)
Amortization of actuarial loss, tax	$ 2	$ 1

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Millions	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock, at Cost	Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Dec. 31, 2017		0	491,000,000
Beginning balance at Dec. 31, 2017	$ 20,270	$ 247	$ 6	$ 18,781	$ 4,164	$ (2,108)	$ (820)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends to common stockholders	(108)				(108)
Dividends to preferred stockholders	(7)				(7)
Treasury stock purchased (in shares)			(4,000,000)
Treasury stock purchased	(175)			0		(175)
Share-based compensation plans (in shares)			1,000,000
Share-based compensation plans	13			13		0
Employee stock purchase plan shares purchased	3			3
Total comprehensive income:
Net income	388				388
Other comprehensive income	(325)						(325)
Total comprehensive income	63				388		(325)
Ending balance (in shares) at Mar. 31, 2018		0	488,000,000
Ending balance at Mar. 31, 2018	20,059	$ 247	$ 6	18,797	4,437	(2,283)	(1,145)
Beginning balance (in shares) at Dec. 31, 2018		1,000,000	466,000,000
Beginning balance at Dec. 31, 2018	20,817	$ 840	$ 6	18,815	5,385	(3,133)	(1,096)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends to common stockholders	(149)				(149)
Dividends to preferred stockholders	(15)				(15)
Preferred stock issued (in shares)		0
Preferred stock issued	$ 292	$ 292
Treasury stock purchased (in shares)	(5,823,891)		(6,000,000)
Treasury stock purchased	$ (200)			0		(200)
Share-based compensation plans (in shares)			1,000,000
Share-based compensation plans	28			28
Employee stock purchase plan shares purchased	4			4
Total comprehensive income:
Net income	439				439
Other comprehensive income	298						298
Total comprehensive income	737				439		298
Ending balance (in shares) at Mar. 31, 2019		1,000,000	461,000,000
Ending balance at Mar. 31, 2019	$ 21,531	$ 1,132	$ 6	$ 18,847	$ 5,672	$ (3,333)	$ (793)

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
OPERATING ACTIVITIES
Net income		$ 439	$ 388
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses		85	78
Originations of mortgage loans held for sale		(2,881)	(614)
Proceeds from sales of mortgage loans held for sale		2,918	655
Purchases of commercial loans held for sale		(543)	(468)
Proceeds from sales of commercial loans held for sale		622	451
Depreciation, amortization and accretion		134	122
Mortgage servicing rights valuation recovery		0	(3)
Debt securities impairment		1	1
Deferred income taxes		(1)	8
Share-based compensation		20	18
Net gain on sales of:
Debt securities		(8)	(8)
Premises and equipment		(6)	0
(Increase) decrease in other assets		(97)	331
Decrease in other liabilities		(211)	(255)
Net cash provided by operating activities		472	704
Investment securities:
Purchases of debt securities available for sale		(2,047)	(1,099)
Proceeds from maturities and paydowns of debt securities available for sale		695	806
Proceeds from sales of debt securities available for sale		821	145
Proceeds from maturities and paydowns of debt securities held to maturity		80	131
Purchases of equity securities, at fair value		(56)	(39)
Proceeds from sales of equity securities, at fair value		39	36
Purchases of equity securities, at cost		(76)	(157)
Proceeds from sales of equity securities, at cost		306	131
Net (increase) decrease in interest-bearing deposits in banks		(19)	50
Acquisitions, net of cash acquired		(129)	0
Net increase in loans and leases		(1,047)	(1,020)
Net increase in bank-owned life insurance		(7)	(13)
Premises and equipment:
Purchases		(16)	(32)
Proceeds from sales		31	0
Capitalization of software		(46)	(57)
Net cash used in investing activities		(1,471)	(1,118)
FINANCING ACTIVITIES
Net increase in deposits		4,341	641
Net decrease in federal funds purchased and securities sold under agreements to repurchase		(488)	(500)
Net decrease in other short-term borrowed funds		(150)	(1,604)
Proceeds from issuance of long-term borrowed funds		2,750	6,250
Repayments of long-term borrowed funds		(7,002)	(3,250)
Treasury stock purchased		(200)	(175)
Net proceeds from issuance of preferred stock		292	0
Dividends declared and paid to common stockholders		(149)	(108)
Dividends declared and paid to preferred stockholders		(15)	0
Payments of employee tax withholding for share-based compensation		(18)	(13)
Net cash (used in) provided by financing activities		(639)	1,241
(Decrease) increase in cash and cash equivalents	[1]	(1,638)	827
Cash and cash equivalents at beginning of period	[1]	4,074	3,032
Cash and cash equivalents at end of period	[1]	$ 2,436	$ 3,859
[1]	Cash and cash equivalents includes cash and due from banks and interest-bearing cash and due from banks as reflected on the Consolidated Balance Sheets.

BASIS OF PRESENTATION

BASIS OF PRESENTATION	3 Months Ended
	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BASIS OF PRESENTATION	NOTE 1 - BASIS OF PRESENTATION Basis of Presentation The unaudited interim Consolidated Financial Statements, including the Notes thereto of Citizens Financial Group, Inc., have been prepared in accordance with GAAP interim reporting requirements, and therefore do not include all information and Notes included in the audited Consolidated Financial Statements in conformity with GAAP. These unaudited interim Consolidated Financial Statements and Notes thereto should be read in conjunction with the Company’s audited Consolidated Financial Statements and accompanying Notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018. The Company’s principal business activity is banking, conducted through its sole banking subsidiary, Citizens Bank, National Association. The unaudited interim Consolidated Financial Statements include the accounts of the Company and subsidiaries in which the Company has a controlling financial interest. All intercompany transactions and balances have been eliminated. The Company has evaluated its unconsolidated entities and does not believe that any entity in which it has an interest, but does not currently consolidate, meets the requirements to be consolidated as a variable interest entity. The unaudited interim Consolidated Financial Statements include all adjustments, consisting of normal recurring adjustments, necessary for a fair presentation of the results for the interim periods. The results for interim periods are not necessarily indicative of results for a full year. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change in the near-term relate to the determination of the ACL and the fair value of MSRs. Certain prior period noninterest expense amounts reported in the Consolidated Statements of Operations have been reclassified to conform to the current period presentation. Beginning in the first quarter of 2019, borrowed funds balances and the associated interest expense are classified based on original maturity. Prior periods have been adjusted to conform with the current period presentation. These changes had no effect on total interest expense, total noninterest expense, income before income tax expense, net income, total comprehensive income, total assets, total borrowed funds, total liabilities or total stockholders’ equity as previously reported. Significant Accounting Policies For further information regarding the Company’s significant accounting policies, see Note 1 “Basis of Presentation” to the Company’s audited Consolidated Financial Statements in the Annual Report on Form 10-K for the year ended December 31, 2018. Acquisitions On March 1, 2019, the Company expanded its mergers and acquisition advisory capabilities through the acquisition of Bowstring Advisors, LLC (“Bowstring”), an Atlanta, Georgia-based mergers and acquisition advisory and capital raising firm. On January 1, 2019, the Company expanded its wealth management position through the acquisition of Clarfeld Financial Advisors, LLC (“Clarfeld”), a Tarrytown, New York-based boutique wealth management and financial advisory firm. These acquisitions resulted in an estimated aggregate increase to goodwill of $118 million as of March 31, 2019. The Company expects that some adjustments of the fair values assigned to the assets acquired and liabilities assumed may subsequently be recorded, although any adjustments are not expected to be material. Accounting Pronouncements Adopted in 2019 Pronouncement Summary of Guidance Effects on Financial Statements Derivatives and Hedging Issued August 2017 • Reduces the complexity and operational burdens of the current hedge accounting model and portrays more clearly the effects of hedge accounting in the financial statements. • Modifies current requirements to facilitate the application of hedge accounting to partial-term hedges, hedges of prepayable financial instruments, and other strategies. Adoption of these optional changes would occur on a prospective basis. • Requires the effects of fair value hedges to be classified in the same income statement line as the earnings effect of the hedged item. Adoption of this change will occur on a prospective basis. • Requires all effects of cash flow hedges to be deferred in other comprehensive income until the hedged cash flows affect earnings. Periodic hedge ineffectiveness will no longer be recognized in earnings. Adoption of this change will occur on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. • The Company adopted the new standard on January 1, 2019 under the modified retrospective method. • Adoption did not have a material impact on the Company’s Consolidated Financial Statements. • Required disclosures are included in Note 9 “Derivatives”. Leases Issued February 2016 • Requires lessees to recognize a right-of-use asset and corresponding lease liability for all leases with a lease term of greater than one year. • Requires lessees and lessors to classify most leases using principles similar to existing lease accounting, but eliminates the “bright line” classification tests. • Requires that for finance leases, a lessee recognize interest expense on the lease liability separately from the amortization of the right-of-use asset in the Consolidated Statements of Operations, while for operating leases, such amounts should be recognized as a combined expense. • Requires expanded disclosures about the nature and terms of lease agreements. • Provides the option to adopt using either a modified cumulative-effect approach wherein the guidance is applied to all periods presented, or through a cumulative-effect adjustment beginning in the period of adoption. • Requires companies with land easements to assess whether the easement meets the definition of a lease before applying other accounting guidance. • The Company adopted the new standard under the modified retrospective approach on January 1, 2019, which is applicable to both its leasing finance business as well as property and equipment leases in which Citizens is lessee. • Adoption resulted in a cumulative-effect adjustment of $12 million, net of taxes, to retained earnings related to leases in which Citizens is lessee. • Adoption resulted in the recognition of a right-of-use asset and corresponding lease liability of $734 million and $749 million, respectively in its Consolidated Balance Sheet as of March 31, 2019 for non-cancelable operating lease agreements. • Required lessor disclosures are included in Note 3 “Loans and Leases” and required lessee disclosures are included in Note 6 “Leases”. Implementation Costs Incurred in a Cloud Computing Arrangement Issued August 2018 • Requires implementation costs incurred in a cloud computing arrangement that is a service contract be deferred and recognized over the term of the arrangement if those costs would be capitalized in a software licensing arrangement. • Requires amortization expense be presented in the same income statement line item as the related hosting service arrangement expense. • Permits adoption prospectively for all implementation costs incurred after adoption or retrospectively through a cumulative-effect adjustment as of the beginning of the first period presented. • The Company prospectively adopted the new standard on January 1, 2019. • Adoption did not have a material impact on the Company’s Consolidated Financial Statements. Accounting Pronouncements Pending Adoption Pronouncement Summary of Guidance Effects on Financial Statements Financial Instruments - Credit Losses Issued June 2016 • Replaces existing incurred loss impairment guidance and establishes a single allowance framework for financial assets carried at amortized cost (including securities HTM), which will reflect management’s estimate of credit losses over the full remaining expected life of the financial assets. • Amends existing impairment guidance for securities AFS to incorporate an allowance, which will allow for reversals of impairment losses in the event that the credit of an issuer improves. • Requires a cumulative-effect adjustment to retained earnings as of the beginning of the reporting period of adoption. • Required effective date: January 1, 2020. • A company-wide, cross-discipline governance structure is in place to implement the new standard. The Company is currently identifying and researching key interpretive issues, revising policies and procedures, and completing the development, configuration and validation of loss forecasting models to meet the requirements of the new guidance. The implementation team is also in the process of assessing forecast accuracy, qualitative factors, how the reasonable and supportable forecast period will be determined and documented, as well as the impacts of that decision in different parts of the credit cycle. • Analytical testing of the models started in the first quarter of 2019, and parallel testing is expected to begin early in the second half of 2019. • The Company expects the standard will result in earlier recognition of credit losses and an overall increase in the ACL, as it will cover estimated credit losses over the full remaining expected life of loans and commitments and will consider future reasonable and supportable changes in macroeconomic conditions. Since the magnitude of the increase in the Company’s ACL will be impacted by economic conditions, forecasted economic conditions, credit quality and trends in the Company’s portfolio at the time of adoption, the quantitative impact cannot yet be reasonably estimated. Disclosure Requirements - Fair Value Measurements Issued August 2018 • Amends disclosure requirements on fair value measurements. • The guidance eliminates requirements for certain disclosures that are no longer considered relevant or cost beneficial, requires new disclosures and modifies existing disclosures that are expected to enhance the usefulness of the financial statements. • Prospective application is required for new disclosure requirements. • Retrospective application is required for all other amendments for all periods presented. • Required effective date: January 1, 2020. Early adoption is permitted. The Company does not intend to adopt this guidance prior to the required effective date. • Adoption is not expected to have a material impact on the Company’s Consolidated Financial Statements.

SECURITIES

SECURITIES	3 Months Ended
	Mar. 31, 2019
Investments, Debt and Equity Securities [Abstract]
SECURITIES	NOTE 2 - SECURITIES The following table presents the major components of securities at amortized cost and fair value: March 31, 2019 December 31, 2018 (in millions) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury and other $72 $— $— $72 $24 $— $— $24 State and political subdivisions 5 — — 5 5 — — 5 Mortgage-backed securities: Federal agencies and U.S. government sponsored entities 20,768 66 (337 ) 20,497 20,211 28 (605 ) 19,634 Other/non-agency 916 18 (4 ) 930 236 3 (7 ) 232 Total mortgage-backed securities, at fair value 21,684 84 (341 ) 21,427 20,447 31 (612 ) 19,866 Total debt securities available for sale, at fair value $21,761 $84 ($341 ) $21,504 $20,476 $31 ($612 ) $19,895 Federal agencies and U.S. government sponsored entities $3,345 $1 ($79 ) $3,267 $3,425 $— ($132 ) $3,293 Other/non-agency — — — — 740 8 — 748 Total mortgage-backed securities, at cost 3,345 1 (79 ) 3,267 4,165 8 (132 ) 4,041 Total debt securities held to maturity $3,345 $1 ($79 ) $3,267 $4,165 $8 ($132 ) $4,041 Money market mutual fund investments $198 $— $— $198 $181 $— $— $181 Total equity securities, at fair value $198 $— $— $198 $181 $— $— $181 Federal Reserve Bank stock $463 $— $— $463 $463 $— $— $463 Federal Home Loan Bank stock 133 — — 133 364 — — 364 Other equity securities 8 — — 8 7 — — 7 Total equity securities, at cost $604 $— $— $604 $834 $— $— $834 The amortized cost and fair value of debt securities by contractual maturity as of March 31, 2019 are presented below. Expected maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations with or without incurring penalties. March 31, 2019 Distribution of Maturities (in millions) 1 Year or Less 1-5 Years 5-10 Years After 10 Years Total Amortized cost: U.S. Treasury and other $72 $— $— $— $72 State and political subdivisions — — — 5 5 Mortgage-backed securities: Federal agencies and U.S. government sponsored entities — 251 1,641 18,876 20,768 Other/non-agency 2 8 — 906 916 Total debt securities available for sale 74 259 1,641 19,787 21,761 Mortgage-backed securities: Federal agencies and U.S. government sponsored entities — — — 3,345 3,345 Total debt securities held to maturity — — — 3,345 3,345 Total amortized cost of debt securities $74 $259 $1,641 $23,132 $25,106 Fair value: U.S. Treasury and other $72 $— $— $— $72 State and political subdivisions — — — 5 5 Mortgage-backed securities: Federal agencies and U.S. government sponsored entities — 247 1,634 18,616 20,497 Other/non-agency 2 8 — 920 930 Total debt securities available for sale 74 255 1,634 19,541 21,504 Mortgage-backed securities: Federal agencies and U.S. government sponsored entities — — — 3,267 3,267 Total debt securities held to maturity — — — 3,267 3,267 Total fair value of debt securities $74 $255 $1,634 $22,808 $24,771 Taxable interest income from investment securities as presented on the Consolidated Statements of Operations was $166 million and $168 million for the three months ended March 31, 2019 and 2018 , respectively. Realized gains and losses on securities are presented below: Three Months Ended March 31, (in millions) 2019 2018 Gains on sale of debt securities $8 $8 Losses on sale of debt securities — — Debt securities gains, net $8 $8 The amortized cost and fair value of debt securities pledged are presented below: March 31, 2019 December 31, 2018 (in millions) Amortized Cost Fair Value Amortized Cost Fair Value Pledged against repurchase agreements $294 $294 $344 $338 Pledged against FHLB borrowed funds — — 745 752 Pledged against derivatives, to qualify for fiduciary powers, and to secure public and other deposits as required by law 3,306 3,248 3,592 3,460 Citizens regularly enters into security repurchase agreements with unrelated counterparties. Repurchase agreements are financial transactions that involve the transfer of a security from one party to another and a subsequent transfer of substantially the same security back to the original party. The Company’s repurchase agreements are typically short-term transactions and accounted for as secured borrowed funds on the Company’s Consolidated Balance Sheets. When permitted by GAAP, the Company offsets short-term receivables associated with its reverse repurchase agreements against short-term payables associated with its repurchase agreements. Citizens recognized no offsetting of short-term receivables or payables as of March 31, 2019 or December 31, 2018 . Citizens offsets certain derivative assets and derivative liabilities on the Consolidated Balance Sheets. For further information see Note 9 "Derivatives." Securitizations of mortgage loans retained in the investment portfolio was $31 million and $26 million for the three months ended March 31, 2019 and 2018 , respectively. These securitizations include a substantive guarantee by a third party. In 2019 the guarantors were FNMA and GNMA and in 2018 the guarantors were FNMA, FHLMC, and GNMA. The debt securities received from the guarantors are classified as AFS. The following tables present mortgage-backed debt securities whose fair values are below carrying values, segregated by those that have been in a continuous unrealized loss position for less than twelve months and those that have been in a continuous unrealized loss position for twelve months or longer: March 31, 2019 Less than 12 Months 12 Months or Longer Total (dollars in millions) Number of Issues Fair Value Gross Unrealized Losses Number of Issues Fair Value Gross Unrealized Losses Number of Issues Fair Value Gross Unrealized Losses Federal agencies and U.S. government sponsored entities 13 $569 ($1 ) 519 $17,548 ($415 ) 532 $18,117 ($416 ) Other/non-agency — — — 7 48 (4 ) 7 48 (4 ) Total 13 $569 ($1 ) 526 $17,596 ($419 ) 539 $18,165 ($420 ) December 31, 2018 Less than 12 Months 12 Months or Longer Total (dollars in millions) Number of Issues Fair Value Gross Unrealized Losses Number of Issues Fair Value Gross Unrealized Losses Number of Issues Fair Value Gross Unrealized Losses Federal agencies and U.S. government sponsored entities 166 $4,881 ($89 ) 429 $15,124 ($648 ) 595 $20,005 ($737 ) Other/non-agency 10 139 (1 ) 11 72 (6 ) 21 211 (7 ) Total 176 $5,020 ($90 ) 440 $15,196 ($654 ) 616 $20,216 ($744 ) Citizens does not currently have the intent to sell these impaired debt securities, and it is not more likely than not that the Company will be required to sell these debt securities prior to the recovery of their amortized cost bases. Citizens has determined that credit losses are not expected to be incurred on the remaining agency and non-agency MBS identified with unrealized losses as of March 31, 2019 . The unrealized losses on these debt securities reflect non-credit-related factors such as changing interest rates and market liquidity. Therefore, Citizens has determined that these debt securities are not other-than-temporarily impaired. Any subsequent increases in the valuation of impaired debt securities do not impact their recorded cost bases. The following table presents the cumulative credit-related losses recognized in earnings on debt securities held by the Company: Three Months Ended March 31, (in millions) 2019 2018 Cumulative balance at beginning of period $81 $80 Credit impairments recognized in earnings on debt securities that have been previously impaired 1 1 Reductions due to increases in cash flow expectations on impaired debt securities (1) — (1 ) Reductions for securities sold during the period (2) (4 ) — Cumulative balance at end of period $78 $80 (1) Reported in interest income from investment securities on the Consolidated Statements of Operations. (2) Reported in securities gains, net on the Consolidated Statements of Operations. Cumulative credit losses recognized in earnings for impaired AFS debt securities held as of March 31, 2019 and March 31, 2018 were $78 million and $80 million respectively. There were no credit losses recognized in earnings for the Company’s HTM portfolio for the three months ended March 31, 2019 and 2018 . For the three months ended March 31, 2019 and 2018 , the Company incurred non-agency MBS credit-related other-than-temporary impairment losses in earnings of $1 million .

LOANS AND LEASES

LOANS AND LEASES	3 Months Ended
	Mar. 31, 2019
Receivables [Abstract]
LOANS AND LEASES	NOTE 3 - LOANS AND LEASES The Company’s loans and leases are disclosed in portfolio segments and classes. The Company’s loan and lease portfolio segments are commercial and retail. The classes of loans and leases are: commercial, commercial real estate, leases, residential mortgages, home equity loans, home equity lines of credit, home equity loans serviced by others, home equity lines of credit serviced by others, automobile, education, credit cards and other retail. The Company’s SBO portfolio consists of purchased home equity loans and lines that were originally serviced by others, which the Company services a portion of internally. A summary of the loans and leases portfolio is presented below: (in millions) March 31, 2019 December 31, 2018 Commercial (1) $41,497 $40,857 Commercial real estate 13,372 13,023 Leases 2,820 2,903 Total commercial loans and leases 57,689 56,783 Residential mortgages 19,174 18,978 Home equity loans 1,006 1,073 Home equity lines of credit 12,394 12,710 Home equity loans serviced by others 375 399 Home equity lines of credit serviced by others 95 104 Automobile 11,992 12,106 Education 9,274 8,900 Credit cards 1,982 1,991 Other retail 3,634 3,616 Total retail loans (2) 59,926 59,877 Total loans and leases (3) $117,615 $116,660 (1) SBA loans serviced for others by our subsidiaries are not included above and amounted to $17 million representing the government guaranteed portion of SBA loans sold to outside investors as of March 31, 2019 . There were no SBA loans serviced for others as of December 31, 2018 . (2) Mortgage loans serviced for others by the Company’s subsidiaries are not included above and amounted to $70.8 billion and $69.6 billion at March 31, 2019 and December 31, 2018 , respectively. (3) Excluded from the table above are LHFS totaling $1.3 billion as of March 31, 2019 and December 31, 2018 . LHFS at fair value as of March 31, 2019 totaled $1.2 billion and consisted of residential mortgages originated for sale of $1.0 billion and loans in the commercial trading portfolio of $177 million . LHFS at fair value as of December 31, 2018 totaled $1.2 billion and consisted of residential mortgages originated for sale of $967 million and loans in the commercial trading portfolio of $252 million . Other LHFS totaled $66 million and $101 million as of March 31, 2019 and December 31, 2018 , respectively, and consisted of commercial loans associated with the Company’s syndication business. Loans pledged as collateral for FHLB borrowed funds, primarily residential mortgages and home equity loans, totaled $23.7 billion and $25.6 billion at March 31, 2019 and December 31, 2018 , respectively. Loans pledged as collateral to support the contingent ability to borrow at the FRB discount window, if necessary, was primarily comprised of auto, commercial and commercial real estate loans, and totaled $18.7 billion and $16.8 billion at March 31, 2019 and December 31, 2018 , respectively. During the three months ended March 31, 2019 , the Company purchased $201 million of education loans. During the three months ended March 31, 2018 , the Company purchased $200 million of commercial loans. During the three months ended March 31, 2019 , the Company sold $182 million of commercial loans and $22 million of retail TDRs, including $12 million of home equity loans and $10 million of residential mortgages. During the three months ended March 31, 2018 the company had no loan sales. Citizens is engaged in the leasing of equipment for commercial use, primarily focused on Fortune 1000 companies for large capital equipment acquisitions including aircraft and railcars, among other equipment. The Company determines if an arrangement is a lease and the related lease classification at inception. Lease terms predominantly range from three to seven years and may include options to terminate the lease early or purchase the leased property prior to the end of the lease term. Certain lease agreements include rental payments based on an index or are adjusted periodically for inflation. The Company does not have lease agreements which contain lease and nonlease components. A lessee is evaluated from a credit perspective using the same underwriting standards and procedures as for a loan borrower. A lessee is expected to make rental payments based on its cash flows and the viability of its operations. Leases are usually not evaluated as collateral-based transactions, and therefore the lessee’s overall financial strength is the most important credit evaluation factor. The components of the net investment in direct finance leases, before ALLL, are presented below: (in millions) March 31, 2019 Total future minimum lease rentals $1,955 Estimated residual value of leased equipment (non-guaranteed) 1,082 Initial direct costs 13 Unearned income (259 ) Total leases $2,791 Interest income on direct financing leases was $20 million for the three months ended March 31, 2019 and is reported within interest and fees on loans and leases in the Consolidated Statement of Operations. A maturity analysis of direct financing lease receivables at March 31, 2019 is presented below: (in millions) 2019 $439 2020 463 2021 344 2022 263 2023 188 Thereafter 258 Total undiscounted future minimum lease rentals $1,955

ALLOWANCE FOR CREDIT LOSSES, NO

ALLOWANCE FOR CREDIT LOSSES, NONPERFORMING ASSETS, AND CONCENTRATIONS OF CREDIT RISK	3 Months Ended
	Mar. 31, 2019
Receivables [Abstract]
ALLOWANCE FOR CREDIT LOSSES, NONPERFORMING ASSETS, AND CONCENTRATIONS OF CREDIT RISK	NOTE 4 - ALLOWANCE FOR CREDIT LOSSES, NONPERFORMING ASSETS, AND CONCENTRATIONS OF CREDIT RISK The ACL consists of the ALLL and the reserve for unfunded commitments. It is increased through a provision for credit losses that is charged to earnings, based on the Company’s quarterly evaluation of the loan and lease portfolio and related commitments, and is reduced by net charge-offs and the ALLL associated with sold loans. See Note 5 “Allowance for Credit Losses, Nonperforming Assets, and Concentrations of Credit Risk” to the Company’s audited Consolidated Financial Statements in the Annual Report on Form 10-K for the year ended December 31, 2018 , for a detailed discussion of the ALLL reserve methodology and estimation techniques. On a quarterly basis, the Company reviews and refines its estimate of the ACL, taking into consideration changes in portfolio size and composition, historical loss experience, internal risk ratings, current economic conditions, industry performance trends and other pertinent information. As of March 31, 2019 , there were no material changes in assumptions or estimation techniques compared with prior periods that impacted the determination of the current period’s ALLL and the reserve for unfunded lending commitments. A summary of changes in the ACL is presented below: Three Months Ended March 31, 2019 (in millions) Commercial Retail Total Allowance for loan and lease losses, beginning of period $690 $552 $1,242 Charge-offs (26 ) (112 ) (138 ) Recoveries 2 47 49 Net charge-offs (24 ) (65 ) (89 ) Provision charged to income 25 67 92 Allowance for loan and lease losses, end of period 691 554 1,245 Reserve for unfunded lending commitments, beginning of period 91 — 91 Provision for unfunded lending commitments (7 ) — (7 ) Reserve for unfunded lending commitments, end of period 84 — 84 Total allowance for credit losses, end of period $775 $554 $1,329 Three Months Ended March 31, 2018 (in millions) Commercial Retail Total Allowance for loan and lease losses, beginning of period $685 $551 $1,236 Charge-offs (3 ) (113 ) (116 ) Recoveries 6 40 46 Net charge-offs 3 (73 ) (70 ) Provision charged to income 23 57 80 Allowance for loan and lease losses, end of period 711 535 1,246 Reserve for unfunded lending commitments, beginning of period 88 — 88 Provision for unfunded lending commitments (2 ) — (2 ) Reserve for unfunded lending commitments, end of period 86 — 86 Total allowance for credit losses, end of period $797 $535 $1,332 The recorded investment in loans and leases based on the Company’s evaluation methodology is presented below: March 31, 2019 December 31, 2018 (in millions) Commercial Retail Total Commercial Retail Total Individually evaluated $386 $696 $1,082 $391 $723 $1,114 Formula-based evaluation 57,303 59,230 116,533 56,392 59,154 115,546 Total loans and leases $57,689 $59,926 $117,615 $56,783 $59,877 $116,660 A summary of the ACL by evaluation method is presented below: March 31, 2019 December 31, 2018 (in millions) Commercial Retail Total Commercial Retail Total Individually evaluated $42 $25 $67 $38 $26 $64 Formula-based evaluation 733 529 1,262 743 526 1,269 Allowance for credit losses $775 $554 $1,329 $781 $552 $1,333 For commercial loans and leases, Citizens utilizes regulatory classification ratings to monitor credit quality. Loans with a “pass” rating are those that the Company believes will be fully repaid in accordance with the contractual loan terms. Commercial loans and leases that are “criticized” are those that have some weakness or potential weakness that indicate an increased probability of future loss. “Criticized” loans are grouped into three categories, “special mention,” “substandard” and “doubtful.” Special mention loans have potential weaknesses that, if left uncorrected, may result in deterioration of the Company’s credit position at some future date. Substandard loans are inadequately protected loans; these loans have well-defined weaknesses that could hinder normal repayment or collection of the debt. Doubtful loans have the same weaknesses as substandard, with the added characteristics that the possibility of loss is high and collection of the full amount of the loan is improbable. For retail loans, the Company primarily uses the loan’s payment and delinquency status to monitor credit quality. The further a loan is past due, the greater the likelihood of future credit loss. These credit quality indicators for both commercial and retail loans are continually updated and monitored. The recorded investment in commercial loans and leases based on regulatory classification ratings is presented below: March 31, 2019 Criticized (in millions) Pass Special Mention Substandard Doubtful Total Commercial $39,296 $1,096 $892 $213 $41,497 Commercial real estate 12,953 381 36 2 13,372 Leases 2,670 111 39 — 2,820 Total commercial loans and leases $54,919 $1,588 $967 $215 $57,689 December 31, 2018 Criticized (in millions) Pass Special Mention Substandard Doubtful Total Commercial $38,600 $1,231 $828 $198 $40,857 Commercial real estate 12,523 412 82 6 13,023 Leases 2,823 39 41 — 2,903 Total commercial loans and leases $53,946 $1,682 $951 $204 $56,783 The recorded investment in classes of retail loans, categorized by delinquency status is presented below: March 31, 2019 Days Past Due (in millions) Current 1-29 30-59 60-89 90 or More Total Residential mortgages $18,876 $119 $38 $10 $131 $19,174 Home equity loans 883 80 12 4 27 1,006 Home equity lines of credit 11,769 366 76 28 155 12,394 Home equity loans serviced by others 332 22 8 2 11 375 Home equity lines of credit serviced by others 67 14 2 1 11 95 Automobile 10,654 1,067 196 58 17 11,992 Education 9,084 142 22 12 14 9,274 Credit cards 1,879 59 14 9 21 1,982 Other retail 3,502 75 27 17 13 3,634 Total retail loans $57,046 $1,944 $395 $141 $400 $59,926 December 31, 2018 Days Past Due (in millions) Current 1-29 30-59 60-89 90 or More Total Residential mortgages $18,664 $131 $37 $13 $133 $18,978 Home equity loans 945 75 12 3 38 1,073 Home equity lines of credit 12,042 386 65 22 195 12,710 Home equity loans serviced by others 355 21 7 3 13 399 Home equity lines of credit serviced by others 79 15 2 1 7 104 Automobile 10,729 1,039 207 59 72 12,106 Education 8,694 159 23 13 11 8,900 Credit cards 1,894 53 14 10 20 1,991 Other retail 3,481 76 26 18 15 3,616 Total retail loans $56,883 $1,955 $393 $142 $504 $59,877 Nonperforming Assets The following table presents nonperforming loans and leases and loans accruing and 90 days or more past due: Nonperforming Accruing and 90 days or more past due (in millions) March 31, 2019 December 31, 2018 March 31, 2019 December 31, 2018 Commercial $208 $194 $1 $1 Commercial real estate 4 7 — — Leases — — — — Total commercial loans and leases 212 201 1 1 Residential mortgages (1) 138 136 20 15 Home equity loans 42 50 — — Home equity lines of credit 217 231 — — Home equity loans serviced by others 15 17 — — Home equity lines of credit serviced by others 14 15 — — Automobile 70 81 — — Education 43 38 2 2 Credit card 22 20 — — Other retail 7 8 9 7 Total retail loans 568 596 31 24 Total $780 $797 $32 $25 (1) Nonperforming balances exclude first lien residential mortgage loans that are 100% guaranteed by the Federal Housing Administration. These loans, which are accruing and 90 days or more past due, totaled $13 million and $12 million as of March 31, 2019 and December 31, 2018 , respectively. Nonperforming balances also exclude guaranteed residential mortgage loans sold to GNMA for which the Company has the right, but not the obligation, to repurchase. These loans totaled $144 million and $133 million as of March 31, 2019 and December 31, 2018 , respectively. These loans are included in the Company’s Consolidated Balance Sheets. Other nonperforming assets consisted primarily of other real estate owned and was presented in other assets on the Consolidated Balance Sheets. Other real estate owned, net of valuation allowance, was $34 million as of both March 31, 2019 and December 31, 2018 . A summary of nonperforming loan and lease key performance indicators is presented below: March 31, 2019 December 31, 2018 Nonperforming commercial loans and leases as a percentage of total loans and leases 0.18 % 0.17 % Nonperforming retail loans as a percentage of total loans and leases 0.48 0.51 Nonperforming loans and leases as a percentage of total loans and leases 0.66 % 0.68 % Nonperforming commercial assets as a percentage of total assets 0.13 % 0.13 % Nonperforming retail assets as a percentage of total assets 0.37 0.39 Nonperforming assets as a percentage of total assets 0.50 % 0.52 % The recorded investment in mortgage loans collateralized by residential real estate property for which formal foreclosure proceedings are in process was $170 million and $172 million as of March 31, 2019 and December 31, 2018 , respectively. An analysis of the age of both accruing and nonaccruing loan and lease past due amounts is presented below: March 31, 2019 December 31, 2018 Days Past Due Days Past Due (in millions) 30-59 60-89 90 or More Total 30-59 60-89 90 or More Total Commercial $70 $9 $71 $150 $85 $3 $78 $166 Commercial real estate 56 65 2 123 8 32 5 45 Leases 8 — — 8 7 — — 7 Total commercial loans and leases 134 74 73 281 100 35 83 218 Residential mortgages 38 10 131 179 37 13 133 183 Home equity loans 12 4 27 43 12 3 38 53 Home equity lines of credit 76 28 155 259 65 22 195 282 Home equity loans serviced by others 8 2 11 21 7 3 13 23 Home equity lines of credit serviced by others 2 1 11 14 2 1 7 10 Automobile 196 58 17 271 207 59 72 338 Education 22 12 14 48 23 13 11 47 Credit cards 14 9 21 44 14 10 20 44 Other retail 27 17 13 57 26 18 15 59 Total retail loans 395 141 400 936 393 142 504 1,039 Total $529 $215 $473 $1,217 $493 $177 $587 $1,257 Impaired Loans Impaired loans include nonaccruing larger balance (greater than $3 million carrying value), non-homogeneous commercial and commercial real estate loans, and restructured loans that are deemed TDRs. A summary of impaired loans by class is presented below: March 31, 2019 (in millions) Impaired Loans With a Related Allowance Allowance on Impaired Loans Impaired Loans Without a Related Allowance Unpaid Contractual Balance Total Recorded Investment in Impaired Loans Commercial $195 $42 $165 $415 $360 Commercial real estate — — 26 46 26 Leases — — — — — Total commercial loans and leases 195 42 191 461 386 Residential mortgages 28 2 118 188 146 Home equity loans 30 2 70 135 100 Home equity lines of credit 23 1 179 243 202 Home equity loans serviced by others 20 1 19 51 39 Home equity lines of credit serviced by others 1 — 6 10 7 Automobile 1 — 21 30 22 Education 126 10 23 149 149 Credit cards 25 8 — 25 25 Other retail 3 1 3 7 6 Total retail loans 257 25 439 838 696 Total $452 $67 $630 $1,299 $1,082 December 31, 2018 (in millions) Impaired Loans With a Related Allowance Allowance on Impaired Loans Impaired Loans Without a Related Allowance Unpaid Contractual Balance Total Recorded Investment in Impaired Loans Commercial $186 $31 $167 $450 $353 Commercial real estate 32 7 6 38 38 Leases — — — — — Total commercial loans and leases 218 38 173 488 391 Residential mortgages 28 2 127 201 155 Home equity loans 34 3 76 148 110 Home equity lines of credit 21 1 181 244 202 Home equity loans serviced by others 22 1 19 54 41 Home equity lines of credit serviced by others 1 — 7 11 8 Automobile 1 — 22 31 23 Education 130 11 23 153 153 Credit cards 24 7 1 25 25 Other retail 4 1 2 8 6 Total retail loans 265 26 458 875 723 Total $483 $64 $631 $1,363 $1,114 Additional information on impaired loans is presented below: Three Months Ended March 31, 2019 2018 (in millions) Interest Income Recognized Average Recorded Investment Interest Income Recognized Average Recorded Investment Commercial $3 $301 $2 $293 Commercial real estate — 26 — 27 Leases — — — — Total commercial loans and leases 3 327 2 320 Residential mortgages 1 143 1 149 Home equity loans 2 101 2 118 Home equity lines of credit 2 196 2 194 Home equity loans serviced by others 1 39 1 50 Home equity lines of credit serviced by others — 7 — 9 Automobile — 21 — 22 Education 2 150 2 171 Credit cards — 24 — 24 Other retail — 6 — 8 Total retail loans 8 687 8 745 Total $11 $1,014 $10 $1,065 Troubled Debt Restructurings In situations where, for economic or legal reasons related to the borrower’s financial difficulties, the Company grants a concession to the borrower that it would not otherwise consider, the related loan is classified as a TDR. TDRs typically result from the Company’s loss mitigation efforts and are undertaken in order to improve the likelihood of recovery and continuity of the relationship with the borrower. The Company’s loan modifications are handled on a case-by-case basis and are negotiated to achieve mutually agreeable terms that maximize loan collectability and meet the borrower’s financial needs. Concessions granted in TDRs for all classes of loans may include lowering the interest rate, forgiving a portion of principal, extending the loan term, lowering scheduled payments for a specified period of time, waiving or delaying a scheduled payment of principal or interest for other than an insignificant time period, or capitalizing past due amounts. A rate increase can be a concession if the increased rate is lower than a market rate for debt with risk similar to that of the restructured loan. TDRs for commercial loans and leases may also involve creating a multiple note structure, accepting non-cash assets, accepting an equity interest, or receiving a performance-based fee. In some cases, a TDR may involve multiple concessions. The financial effects of TDRs for all loan classes may include lower income (either due to a lower interest rate or a delay in the timing of cash flows), larger loan loss provisions, and accelerated charge-offs if the modification renders the loan collateral-dependent. In some cases, interest income throughout the term of the loan may increase if, for example, the loan is extended or the interest rate is increased as a result of the restructuring. Because TDRs are impaired loans, Citizens measures impairment by comparing the present value of expected future cash flows, or when appropriate, the fair value of collateral less costs to sell, to the loan’s recorded investment. Any excess of recorded investment over the present value of expected future cash flows or collateral value is included in the ALLL. Any portion of the loan’s recorded investment the Company does not expect to collect as a result of the modification is charged off at the time of modification. For retail TDR accounts where the expected value of cash flows is utilized, any recorded investment in excess of the present value of expected cash flows is recognized by increasing the ALLL. For retail TDR accounts assessed based on the fair value of collateral, any portion of the loan’s recorded investment in excess of the collateral value less costs to sell is charged off at the time of modification or at the time of subsequent and regularly recurring valuations. The table below summarizes TDRs by class and total unfunded commitments: (in millions) March 31, 2019 December 31, 2018 Commercial $296 $304 Retail 696 723 Unfunded commitments related to TDRs 25 30 The table below summarizes how loans were modified during the three months ended March 31, 2019 and 2018 . The reported balances represent the post-modification outstanding recorded investment and can include loans that became TDRs during the period and were paid off in full, charged off, or sold prior to period end. Pre-modification balances for modified loans approximate the post-modification balances shown. Three Months Ended March 31, 2019 Primary Modification Types Interest Rate Reduction 1 Maturity Extension 2 Other 3 (dollars in millions) Number of Contracts Recorded Investment Number of Contracts Recorded Investment Number of Contracts Recorded Investment Commercial — $— 5 $1 12 $40 Commercial real estate — — — — — — Total commercial loans — — 5 1 12 40 Residential mortgages 4 2 11 2 30 4 Home equity loans 7 — — — 27 1 Home equity lines of credit 29 4 35 6 105 8 Home equity loans serviced by others — — — — 4 — Home equity lines of credit serviced by others — — — — 2 — Automobile 25 — 5 — 289 4 Education — — — — 67 2 Credit cards 616 4 — — — — Other retail — — — — 1 — Total retail loans 681 10 51 8 525 19 Total 681 $10 56 $9 537 $59 Three Months Ended March 31, 2018 Primary Modification Types Interest Rate Reduction 1 Maturity Extension 2 Other 3 (dollars in millions) Number of Contracts Recorded Investment Number of Contracts Recorded Investment Number of Contracts Recorded Investment Commercial 1 $— 6 $1 18 $75 Commercial real estate — — 1 — — — Total commercial loans 1 — 7 1 18 75 Residential mortgages 7 1 7 1 53 6 Home equity loans 11 1 — — 32 2 Home equity lines of credit 15 1 42 5 93 7 Home equity loans serviced by others 1 — — — 7 — Home equity lines of credit serviced by others 2 — — — 3 — Automobile 36 1 17 1 269 4 Education — — — — 112 1 Credit cards 594 3 — — — — Other retail 1 — — — 4 — Total retail loans 667 7 66 7 573 20 Total 668 $7 73 $8 591 $95 (1) Includes modifications that consist of multiple concessions, one of which is an interest rate reduction. (2) Includes modifications that consist of multiple concessions, one of which is a maturity extension (unless one of the other concessions was an interest rate reduction). (3) Includes modifications other than interest rate reductions or maturity extensions, such as lowering scheduled payments for a specified period of time, principal forgiveness, and capitalizing arrearages. Also included are the following: deferrals, trial modifications, certain bankruptcies, loans in forbearance and prepayment plans. Modifications can include the deferral of accrued interest resulting in post modification balances being higher than pre-modification. The net change to ALLL resulting from modification for the three months ended March 31, 2019 and 2018 was $2 million and $1 million , respectively. Charge-offs may also be recorded on TDRs. Citizens recorded $1 million of charge-offs resulting from the modification of loans in the three months ended March 31, 2019 and 2018 . A payment default refers to a loan that becomes 90 days or more past due under the modified terms. Loan data includes loans meeting the criteria that were paid off in full, charged off, or sold prior to March 31, 2019 and 2018 . If a TDR of any loan type becomes 90 days past due after being modified, the loan is written down to the fair value of collateral less cost to sell. The amount written off is charged to the ALLL. For commercial loans, recorded investment in TDRs that defaulted within 12 months of their modification date for the three months ended March 31, 2018 were $3 million . There were none for the three months ended March 31, 2019 . For retail loans, there were $9 million and $10 million of loans which defaulted within 12 months of their restructuring date for the three months ended March 31, 2019 and 2018 , respectively. Concentrations of Credit Risk Most of the Company’s lending activity is with customers located in the New England, Mid-Atlantic and Midwest regions. Generally, loans are collateralized by assets including real estate, inventory, accounts receivable, other personal property and investment securities. As of March 31, 2019 and December 31, 2018 , Citizens had a significant amount of loans collateralized by residential and commercial real estate. There were no significant concentration risks within the commercial loan or retail loan portfolios. Exposure to credit losses arising from lending transactions may fluctuate with fair values of collateral supporting loans, which may not perform according to contractual agreements. The Company’s policy is to collateralize loans to the extent necessary; however, unsecured loans are also granted on the basis of the financial strength of the applicant and the facts surrounding the transaction. Certain loan products, including residential mortgages, home equity loans and lines of credit, and credit cards, have contractual features that may increase credit exposure to the Company in the event of an increase in interest rates or a decline in housing values. These products include loans that exceed 90% of the value of the underlying collateral (high LTV loans), interest-only and negative amortization residential mortgages, and loans with low introductory rates. Certain loans have more than one of these characteristics. The following tables present balances of loans with these characteristics: March 31, 2019 (in millions) Residential Mortgages Home Equity Loans and Lines of Credit Home Equity Products Serviced by Others Credit Cards Total High loan-to-value $342 $79 $134 $— $555 Interest-only/negative amortization 1,724 — — — 1,724 Low introductory rate — — — 219 219 Multiple characteristics and other 2 — — — 2 Total $2,068 $79 $134 $219 $2,500 December 31, 2018 (in millions) Residential Mortgages Home Equity Loans and Lines of Credit Home Equity Products Serviced by Others Credit Cards Education Total High loan-to-value $318 $87 $148 $— $— $553 Interest-only/negative amortization 1,794 — — — 1 1,795 Low introductory rate — — — 217 — 217 Multiple characteristics and other 1 — — — — 1 Total $2,113 $87 $148 $217 $1 $2,566

MORTGAGE BANKING

MORTGAGE BANKING	3 Months Ended
	Mar. 31, 2019
Mortgage Banking [Abstract]
MORTGAGE BANKING	NOTE 5 - MORTGAGE BANKING In its mortgage banking business, the Company sells residential mortgages to GSEs and other parties, who may issue securities backed by pools of such loans. The Company retains no beneficial interests in these sales, but may retain the servicing rights for the loans sold. The Company is obligated to subsequently repurchase a loan if the purchaser discovers a representation or warranty violation such as noncompliance with eligibility or servicing requirements, or customer fraud that should have been identified in a loan file review. The Company recognizes the right to service residential mortgage loans for others, or MSRs, as separate assets, which are presented in other assets on the Consolidated Balance Sheets, when purchased, or when servicing is contractually separated from the underlying mortgage loans by sale with servicing rights retained. The following table summarizes activity related to residential mortgage loans sold with servicing rights retained for the three months ended March 31, 2019 and 2018 . Three Months Ended March 31, (in millions) 2019 2018 Residential mortgage loans sold with servicing retained $2,919 $655 Gain on sales (1) 37 13 Contractually specified servicing, late and other ancillary fees (1) 48 15 (1) Reported in mortgage banking fees on the Consolidated Statements of Operations. As of August 1, 2018, the Company maintains two separate classes of MSRs which at the time of initial capitalization, are differentiated by how the risk associated with valuation changes of the MSRs is managed. The acquired FAMC portfolio is accounted for under the fair value method while the Company’s MSR portfolio held before the FAMC acquisition is accounted for under the amortization method. Beginning January 1, 2019, all of the Company’s newly originated MSRs are accounted for under the fair value method. The Company implemented an active hedging strategy to manage the risk associated with changes in the value of the MSR portfolio accounted for under the fair value method, which includes the purchase of freestanding derivatives. Any change in fair value during the period for MSRs carried under the fair value method, as well as amortization and impairment of MSRs under the amortization method, is recorded in mortgage banking fees in the Consolidated Statements of Operations. The following table summarizes changes in MSRs recorded using the amortization method for the three months ended March 31, 2019 and 2018 . As of and for the Three Months Ended March 31, (in millions) 2019 2018 Mortgage servicing rights: Balance as of beginning of period $221 $201 Amount capitalized — 8 Amortization (9 ) (8 ) Carrying amount before valuation allowance 212 201 Valuation allowance for servicing assets: Balance as of beginning of period — 3 Valuation recoveries — (3 ) Balance at end of period — — Net carrying value of MSRs $212 $201 The following table summarizes changes in MSRs recorded using the fair value method for the three months ended March 31, 2019 . There were no MSRs recorded using the fair value method for the three months ended March 31, 2018 . Three Months Ended March 31, 2019 (in millions) Fair value as of beginning of the period $600 Amounts capitalized 35 Changes in unpaid principal balance during the period (1) (26 ) Changes in fair value during the period (2) (46 ) Fair value at end of the period $563 (1) Represents changes in value due to i) passage of time including the impact from both regularly scheduled loan principal payments and partial paydowns, and ii) loans that paid off during the period. (2) Represents changes in value primarily due to market driven changes in interest rates and prepayment speeds. The fair value of MSRs is estimated by using the present value of estimated future net servicing cash flows, taking into consideration actual and expected mortgage loan prepayment rates, discount rates, contractual servicing fee income, servicing costs, default rates, ancillary income, and other economic factors, which are determined based on current market interest rates. The valuation does not attempt to forecast or predict the future direction of interest rates. The sensitivity analysis below presents the impact to current fair value of an immediate 50 basis point and 100 basis point adverse change in the key economic assumptions and presents the decline in fair value that would occur if the adverse change were realized. These sensitivities are hypothetical, with the effect of a variation in a particular assumption on the fair value of the mortgage servicing rights calculated independently without changing any other assumption. In reality, changes in one factor may result in changes in another (e.g., changes in interest rates, which drive changes in prepayment rates, could result in changes in the discount rates), which may amplify or counteract the sensitivities. The primary risk inherent in the Company’s MSRs is an increase in prepayments of the underlying mortgage loans serviced, which is dependent upon movements in market interest rates. For MSRs under the amortization method, the key economic assumptions used to estimate the fair value are presented below: March 31, 2019 December 31, 2018 Actual Decline in fair value due to Actual Decline in fair value due to (dollars in millions) Fair value $224 50 bps adverse change 100 bps adverse change $243 50 bps adverse change 100 bps adverse change Weighted average life (in years) 6.1 6.5 Weighted average constant prepayment rate 9.6% $27 $58 8.5% $24 $56 Weighted average discount rate 9.3% 4 8 9.3% 5 9 For MSRs under the fair value method, the key economic assumptions used to estimate the fair value are presented below: March 31, 2019 December 31, 2018 Actual Decline in fair value due to Actual Decline in fair value due to (dollars in millions) Fair value $563 50 bps adverse change 100 bps adverse change $600 50 bps adverse change 100 bps adverse change Weighted average life (in years) 6.7 8.0 Weighted average constant prepayment rate 10.7% $81 $177 8.2% $68 $148 Weighted average option adjusted spread 568 bps 11 22 609 bps 13 26 Citizens accounts for derivatives in its mortgage banking operations at fair value on the balance sheet as derivative assets or derivative liabilities, depending on whether the derivative had a positive (asset) or negative (liability) fair value as of the balance sheet date. The Company’s mortgage banking derivatives include commitments to originate mortgages held for sale, certain loan sale agreements, and other financial instruments that meet the definition of a derivative. Refer to Note 9 "Derivatives" for additional information.

LEASES

LEASES	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Leases	NOTE 6 - LEASES The Company determines if an arrangement is a lease at inception and records a right-of-use asset and a corresponding lease liability. A right-of-use asset represents the value of the Company’s contractual right to use an underlying leased asset and a lease liability represents the Company’s contractual obligation to make payments on the same underlying leased asset. Operating and finance lease right-of-use assets and liabilities are recognized at commencement date based on the present value of the lease payments over the non-cancelable lease term. As most of the Company’s leases do not specify an implicit rate, the Company uses an incremental borrowing rate based on information available at the lease commencement date to determine the present value of the lease payments. The Company evaluates right-of-use assets for impairment when events or changes in circumstances indicate that the carrying value of the asset may not be recoverable. In its normal course of business, the Company leases both equipment and real estate, including office and branch space. Lease terms predominantly range from one to ten years and may include options to extend the lease, terminate the lease, or purchase the underlying asset at the end of the lease. Certain lease agreements include rental payments based on an index or are adjusted periodically for inflation. The Company has lease agreements that contain lease and non-lease components and for certain real estate leases, these components are accounted for as a single lease component. Leases with an initial term of 12 months or less are not recorded on the Company’s Consolidated Balance Sheets and are recognized in occupancy expense in the Company’s Consolidated Statements of Operations on a straight-line basis over the remaining lease term. The Company may also enter into subleases with third parties for certain leased real estate properties that are no longer occupied. The components of operating lease cost are presented below: (in millions) Three Months Ended March 31, 2019 Operating lease cost $40 Short-term lease cost 3 Variable lease cost 2 Sublease income (1 ) Total $44 Operating lease cost is recognized on a straight line basis over the lease term and recorded in occupancy expense on the Consolidated Statements of Operations. Supplemental Consolidated Balance Sheet information related to the Company’s operating lease arrangements is presented below: (in millions) March 31, 2019 Affected Line Item in Consolidated Balance Sheets Operating lease right-of-use assets $746 Other assets Operating lease liabilities 762 Other liabilities Supplemental information related to the Company’s operating lease arrangements is presented below: (in millions) Three Months Ended March 31, 2019 Cash paid for amounts included in measurement of liabilities: Operating cash flows from operating leases $39 Right-of-use assets in exchange for new operating lease liabilities 47 The weighted average remaining lease term and weighted average discount rate for operating leases is seven years and 3.23% , respectively. At March 31, 2019 , lease liabilities maturing under non-cancelable operating leases are presented below for the years ended December 31: (in millions Operating Leases 2019 $108 2020 157 2021 140 2022 115 2023 90 Thereafter 249 Total lease payments 859 Less interest 97 Present value of lease liabilities $762

VARIABLE INTEREST ENTITIES

VARIABLE INTEREST ENTITIES	3 Months Ended
	Mar. 31, 2019
Equity Method Investments and Joint Ventures [Abstract]
VARIABLE INTEREST ENTITIES	NOTE 7 - VARIABLE INTEREST ENTITIES Citizens is involved in various entities that are considered VIEs, including investments in limited partnerships that sponsor affordable housing projects, limited liability companies that sponsor renewable energy projects and lending to special purpose entities. Citizens’ maximum exposure to loss as a result of its involvement with these entities is limited to the balance sheet carrying amount of its equity investment and outstanding loans to special purpose entities. A summary of these investments is presented below: (in millions) March 31, 2019 December 31, 2018 LIHTC investment included in other assets $1,263 $1,236 LIHTC unfunded commitments included in other liabilities 676 673 Renewable energy investments included in other assets 315 319 Lending to special purpose entities included in loans and leases 728 613 Low Income Housing Tax Credit Partnerships The purpose of the Company’s equity investments is to assist in achieving the goals of the Community Reinvestment Act and to earn an adequate return of capital. LIHTC partnerships are managed by unrelated general partners that have the power to direct the activities which most significantly affect the performance of the partnerships. Citizens is therefore not the primary beneficiary of any LIHTC partnerships. Accordingly, Citizens does not consolidate these VIEs and accounts for these investments in other assets on the Consolidated Balance Sheets. Citizens applies the proportional amortization method to account for its LIHTC investments. Under the proportional amortization method, the Company applies a practical expedient and amortizes the initial cost of the investment in proportion to the tax credits received in the current period as compared to the total tax credits expected to be received over the life of the investment. The amortization and tax benefits are included as a component of income tax expense. The tax credits received are reported as a reduction of income tax expense (or an increase to income tax benefit) related to these transactions. The following table presents other information related to the Company’s affordable housing tax credit investments: Three Months Ended March 31, (in millions) 2019 2018 Tax credits included in income tax expense $35 $25 Amortization expense included in income tax expense 37 27 Other tax benefits included in income tax expense 8 6 No LIHTC investment impairment losses were recognized during the three months ended March 31, 2019 and 2018 , respectively. Renewable Energy Entities The Company’s investments in renewable energy entities provide benefits from a return generated by government incentives plus other tax attributes that are associated with tax ownership (e.g., tax depreciation). As a tax equity investor, Citizens does not have the power to direct the activities which most significantly affect the performance of these entities and therefore is not the primary beneficiary of any renewable energy entities. Accordingly, Citizens does not consolidate these VIEs and accounts for these investments in other assets on the Consolidated Balance Sheets. Lending to Special Purpose Entities Citizens provides lending facilities to third-party sponsored special purpose entities. Because the sponsor for each respective entity has the power to direct how proceeds from the Company are utilized, as well as maintains responsibility for any associated servicing commitments, Citizens is not the primary beneficiary of these entities. Accordingly, Citizens does not consolidate these VIEs on the Consolidated Balance Sheets. As of March 31, 2019 and December 31, 2018 , the lending facilities had aggregate unpaid principal balances of $728 million and $613 million , respectively, and undrawn commitments to extend credit of $677 million and $584 million , respectively.

BORROWED FUNDS

BORROWED FUNDS	3 Months Ended
	Mar. 31, 2019
Debt Disclosure [Abstract]
BORROWED FUNDS	NOTE 8 - BORROWED FUNDS A summary of the Company’s short-term borrowed funds is presented below: (in millions) March 31, 2019 December 31, 2018 Federal funds purchased $375 $820 Securities sold under agreements to repurchase 293 336 Other short-term borrowed funds 11 161 Total short-term borrowed funds $679 $1,317 Key data related to short-term borrowed funds is presented in the following table: As of and for the Three Months Ended March 31, As of and for the Year Ended December 31, (dollars in millions) 2019 2018 2018 Weighted-average interest rate at period-end: (1) Federal funds purchased and securities sold under agreements to repurchase 1.39 % — % 1.72 % Other short-term borrowed funds 3.03 3.40 2.73 Maximum amount outstanding at any month-end during the period: Federal funds purchased and securities sold under agreements to repurchase (2) $1,134 $625 $1,282 Other short-term borrowed funds 511 1,110 1,110 Average amount outstanding during the period: Federal funds purchased and securities sold under agreements to repurchase (2) $640 $645 $654 Other short-term borrowed funds 58 588 467 Weighted-average interest rate during the period: (1) Federal funds purchased and securities sold under agreements to repurchase 1.24 % 0.66 % 0.92 % Other short-term borrowed funds 2.75 1.67 2.10 (1) Rates exclude certain hedging costs. (2) Balances are net of certain short-term receivables associated with reverse repurchase agreements, as applicable. A summary of the Company’s long-term borrowed funds is presented below: (in millions) March 31, 2019 December 31, 2018 Parent Company: 2.375% fixed-rate senior unsecured debt, due July 2021 $349 $349 4.150% fixed-rate subordinated debt, due September 2022 348 348 3.750% fixed-rate subordinated debt, due July 2024 250 250 4.023% fixed-rate subordinated debt, due October 2024 42 42 4.350% fixed-rate subordinated debt, due August 2025 249 249 4.300% fixed-rate subordinated debt, due December 2025 750 749 Banking and Other Subsidiaries: 2.500% senior unsecured notes, due March 2019 (1) — 748 2.450% senior unsecured notes, due December 2019 (1) 745 744 2.250% senior unsecured notes, due March 2020 (1) 694 691 3.155% floating-rate senior unsecured notes, due March 2020 (1) (2) 300 300 3.216% floating-rate senior unsecured notes, due May 2020 (1) (2) 250 250 2.200% senior unsecured notes, due May 2020 (1) 499 499 2.250% senior unsecured notes, due October 2020 (1) 742 738 2.550% senior unsecured notes, due May 2021 (1) 973 964 3.250% senior unsecured notes, due February 2022 (1) 702 — 3.413% floating-rate senior unsecured notes, due February 2022 (1) (2) 299 — 3.456% floating-rate senior unsecured notes, due May 2022 (1) (2) 249 249 2.650% senior unsecured notes, due May 2022 (1) 492 487 3.700% senior unsecured notes, due March 2023 (1) 508 502 3.551% floating-rate senior unsecured notes, due March 2023 (1) (2) 249 249 3.750% senior unsecured notes, due February 2026 (1) 506 — Federal Home Loan Bank advances, 2.787% weighted average rate, due through 2038 2,508 7,508 Other 21 9 Total long-term borrowed funds $11,725 $15,925 (1) Issued under CBNA’s Global Bank Note Program. (2) Rate disclosed reflects the floating rate as of March 31, 2019 . The Parent Company’s long-term borrowed funds as of March 31, 2019 and December 31, 2018 included principal balances of $2.0 billion for each period, respectively, and unamortized deferred issuance costs and/or discounts of ($4) million and ($5) million , respectively. The banking and other subsidiaries’ long-term borrowed funds as of March 31, 2019 and December 31, 2018 included principal balances of $9.8 billion and $14.0 billion , respectively, with unamortized deferred issuance costs and/or discounts of ($18) million and ($14) million , respectively, and hedging basis adjustments of ($23) million and ($66) million , respectively. See Note 9 "Derivatives" for further information about the Company’s hedging of certain long-term borrowed funds. Advances, lines of credit, and letters of credit from the FHLB are collateralized by pledged mortgages and pledged securities at least sufficient to satisfy the collateral maintenance level established by the FHLB. The utilized borrowing capacity for FHLB advances and letters of credit was $7.7 billion and $13.0 billion at March 31, 2019 and December 31, 2018 , respectively. The Company’s available FHLB borrowing capacity was $8.4 billion and $4.8 billion at March 31, 2019 and December 31, 2018 , respectively. Citizens can also borrow from the FRB discount window to meet short-term liquidity requirements. Collateral, including certain loans, is pledged to support this borrowing capacity. At March 31, 2019 , the Company’s unused secured borrowing capacity was approximately $42.5 billion , which includes unencumbered securities, FHLB borrowing capacity, and FRB discount window capacity. A summary of maturities for the Company’s long-term borrowed funds at March 31, 2019 is presented below: (in millions) Parent Company Banking and Other Subsidiaries Consolidated Year 2019 $— $748 $748 2020 — 4,989 4,989 2021 349 978 1,327 2022 348 1,749 2,097 2023 — 759 759 2024 and thereafter 1,291 514 1,805 Total $1,988 $9,737 $11,725

DERIVATIVES

DERIVATIVES	3 Months Ended
	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVES	NOTE 9 - DERIVATIVES In the normal course of business, Citizens enters into a variety of derivative transactions in order to meet the financing needs of its customers and to reduce its own exposure to fluctuations in interest rates and foreign currency exchange rates. These transactions include interest rate swap contracts, interest rate options, foreign exchange contracts, residential loan commitment rate locks, interest rate future contracts, swaptions, forward commitments to sell to-be-announced mortgage securities (“TBAs”), forward sale contracts and purchase options. The Company monitors the results of each transaction to ensure that management’s intent is satisfied. The Company does not use derivatives for speculative purposes. The Company’s derivative instruments are recognized on the Consolidated Balance Sheets at fair value. Information regarding the valuation methodology and inputs used to estimate the fair value of the Company’s derivative instruments is described in Note 13 "Fair Value Measurements." The following table presents derivative instruments included on the Consolidated Balance Sheets in derivative assets and derivative liabilities: March 31, 2019 December 31, 2018 (in millions) Notional Amount (1) Derivative Assets Derivative Liabilities Notional Amount (1) Derivative Assets Derivative Liabilities Derivatives designated as hedging instruments: Interest rate contracts $14,500 $— $15 $12,050 $5 $— Derivatives not designated as hedging instruments: Interest rate contracts 126,525 443 145 117,076 301 277 Foreign exchange contracts 11,858 135 113 9,866 129 113 Other contracts 5,221 19 21 3,555 14 25 Total derivatives not designated as hedging instruments 597 279 444 415 Gross derivative fair values 597 294 449 415 Less: Gross amounts offset in the Consolidated Balance Sheets (2) (78 ) (78 ) (87 ) (87 ) Less: Cash collateral applied (2) (54 ) (43 ) (45 ) (36 ) Total net derivative fair values presented in the Consolidated Balance Sheets $465 $173 $317 $292 (1) The notional or contractual amount of interest rate derivatives and foreign exchange contracts is the amount upon which interest and other payments under the contract are based. For interest rate contracts, the notional amount is typically not exchanged. Therefore, notional amounts should not be taken as the measure of credit or market risk, as they do not measure the true economic risk of these contracts. (2) Amounts represent the impact of enforceable master netting agreements that allow the Company to net settle positive and negative positions. The Company’s derivative transactions are internally divided into three sub-groups: institutional, customer and residential loan. Citizens has certain derivative transactions which are designated as fair value or cash flow hedges, described as follows: Derivatives Designated As Hedging Instruments The Company’s institutional derivatives portfolio qualifies for hedge accounting treatment. This includes interest rate swaps that are designated as highly effective fair value and cash flow hedging relationships. The Company formally documents at inception all hedging relationships, as well as risk management objectives and strategies for undertaking various accounting hedges. Additionally, Citizens monitors the effectiveness of its hedge relationships during the duration of the hedge relationship. The methods utilized to assess hedge effectiveness vary based on the type of item being hedged. The Company discontinues hedge accounting treatment when it is determined that a derivative is not expected to be, or has ceased to be, effective as a hedge and then reflects changes in fair value in earnings after termination of the hedge relationship. Fair Value Hedges Citizens has outstanding interest rate swap agreements to manage the interest rate exposure on its medium-term borrowings. The changes in the fair value of the derivative instrument and changes in the fair value of the hedged asset or liability attributable to the hedged risk are recorded in the same income statement line in the Consolidated Statements of Operations. The following table reflects the change in fair value of interest rate contracts, designated as fair value hedges, as well as the change in fair value of the related hedged items attributable to the risk being hedged, included in the Consolidated Statements of Operations: Three Months Ended March 31, (in millions) 2019 2018 Affected Line Item in the Consolidated Statements of Operations Change in fair value of interest rate swaps hedging borrowed funds $39 ($39 ) Interest expense - borrowed funds Change in fair value of hedged long-term debt attributable to the risk being hedged (39 ) 37 Interest expense - borrowed funds The following table reflects amounts recorded on the Consolidated Balance Sheets related to cumulative basis adjustments for fair value hedges: March 31, 2019 (in millions) Long-term borrowed funds Carrying amount of the hedged liabilities $5,362 Cumulative amount of fair value hedging adjustments included in the carrying amount of the hedged items (1) (23 ) (1) The balance reported includes ($4) million of cumulative hedging adjustments recorded on discontinued fair value hedging relationships. Cash Flow Hedges Citizens has outstanding interest rate swap agreements designed to hedge a portion of the Company’s floating rate assets. All of these swaps have been deemed as highly effective cash flow hedges. The entire change in the fair value of the interest rate swap included in the assessment of hedge effectiveness is recorded in OCI and reclassified from OCI to current period earnings (interest income or interest expense) in the same period that the hedged item affects earnings. During the next 12 months, there are $12 million in pre-tax net losses on derivative instruments included in OCI expected to be reclassified to net interest income in the Consolidated Statements of Operations. This amount could differ from amounts actually recognized due to changes in interest rates, hedge de-designations, and the addition of other hedges subsequent to March 31, 2019 . During the three months ended March 31, 2019 and 2018 , there were no gains or losses reclassified from OCI to current period earnings (other income) associated with the discontinuance of the Company’s cash flow hedges because it was probable that the original forecasted transaction would no longer occur by the end of the originally specified time period. The following table presents the pretax net gains (losses) recorded in the Consolidated Statements of Operations and in the Consolidated Statements of Comprehensive Income relating to derivative instruments designated as cash flow hedges: Three Months Ended March 31, (in millions) 2019 2018 (1) Amount of pretax net gains (losses) recognized in OCI $51 ($70 ) Amount of pretax net losses reclassified from OCI into interest income (20 ) (6 ) Amount of pretax net gains reclassified from OCI into interest expense — 4 (1) For the three months ended March 31, 2018 , the amount of pretax net losses recognized in OCI represented the effective portion of the cumulative gains or losses on cash flow hedges and ineffectiveness was reported within noninterest income. Derivatives Not Designated As Hedging Instruments Economic Hedges The Company’s customer derivatives are recorded on the Consolidated Balance Sheets at fair value. These include interest rate and foreign exchange derivative contracts that are designed to meet the hedging and financing needs of the Company’s customers. The mark-to-market gains and losses associated with the customer derivatives are mitigated by mark-to-market gains and losses on interest rate and foreign exchange derivative contracts transacted. Citizens also purchases interest rate floors primarily to hedge the exposure related to customer deposit products that have embedded minimum interest rate guarantees. Citizens utilizes interest rate floors in non-qualifying hedging relationships. The Company’s residential loan derivatives (including residential loan commitments and forward sales contracts) are recorded on the Consolidated Balance Sheets at fair value. Citizens also uses derivatives to hedge the risk of changes in the fair value of its residential MSR portfolio measured at fair value. Certain residential MSRs are accounted for at fair value with changes in the fair value influenced primarily by changes in interest rates. Derivatives used to hedge the fair value of residential MSRs include TBAs, interest rate swaptions, interest rate futures and interest rate swaps. The following table presents the effect of economic hedges on noninterest income: Amounts Recognized in Noninterest Income for the Three Months Ended March 31, Affected Line Item in the Consolidated Statements of Operations (in millions) 2019 2018 Economic hedge type: Customer interest rate contracts $229 ($204 ) Foreign exchange and interest rate products Customer foreign exchange contracts (34 ) 11 Foreign exchange and interest rate products Derivatives transactions to hedge interest rate risk (217 ) 216 Foreign exchange and interest rate products Derivatives transactions to hedge foreign exchange risk 40 (17 ) Foreign exchange and interest rate products Residential loan commitments 5 (1 ) Mortgage banking fees Forward sale contracts 4 — Mortgage banking fees Interest rate derivative contracts used to hedge residential MSRs 45 — Mortgage banking fees Total $72 $5

RECLASSIFICATIONS OUT OF ACCUMU

RECLASSIFICATIONS OUT OF ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
RECLASSIFICATIONS OUT OF ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)	NOTE 10 - RECLASSIFICATIONS OUT OF ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) The following tables present the changes in the balances, net of income taxes, of each component of AOCI: As of and for the Three Months Ended March 31, (in millions) Net Unrealized (Losses) Gains on Derivatives Net Unrealized (Losses) Gains on Debt Securities Employee Benefit Plans Total AOCI Balance at January 1, 2018 ($143 ) ($236 ) ($441 ) ($820 ) Other comprehensive loss before reclassifications (52 ) (272 ) — (324 ) Other-than-temporary impairment not recognized in earnings on debt securities — (1 ) — (1 ) Amounts reclassified to the Consolidated Statements of Operations 2 (5 ) 3 — Net other comprehensive (loss) income (50 ) (278 ) 3 (325 ) Balance at March 31, 2018 ($193 ) ($514 ) ($438 ) ($1,145 ) Balance at January 1, 2019 ($143 ) ($490 ) ($463 ) ($1,096 ) Other comprehensive income before reclassifications 39 246 — 285 Other-than-temporary impairment not recognized in earnings on debt securities — — — — Amounts reclassified to the Consolidated Statements of Operations 15 (5 ) 3 13 Cumulative effect of change in accounting standards — 5 — 5 Net other comprehensive income 54 246 3 303 Balance at March 31, 2019 ($89 ) ($244 ) ($460 ) ($793 ) The following table presents the amounts reclassified out of each component of AOCI and into the Consolidated Statements of Operations: Three Months Ended March 31, (in millions) 2019 2018 Details about AOCI Components Affected Line Item in the Consolidated Statements of Operations Reclassification adjustment for net derivative losses included in net income: ($20 ) ($6 ) Interest income — 4 Interest expense (20 ) (2 ) Income before income tax expense (5 ) — Income tax expense ($15 ) ($2 ) Net income Reclassification of net debt securities gains to net income: $8 $8 Securities gains, net (1 ) (1 ) Net debt securities impairment losses recognized in earnings 7 7 Income before income tax expense 2 2 Income tax expense $5 $5 Net income Reclassification of changes related to the employee benefit plan: ($5 ) ($4 ) Other operating expense (5 ) (4 ) Income before income tax expense (2 ) (1 ) Income tax expense ($3 ) ($3 ) Net income Total reclassification (losses) gains ($13 ) $— Net income The following table presents the effects on net income of the amounts reclassified out of AOCI: Three Months Ended March 31, (in millions) 2019 2018 Net interest income (includes ($20) and ($2) of AOCI reclassifications, respectively) $1,160 $1,091 Provision for credit losses 85 78 Noninterest income (includes $7 and $7 of AOCI reclassifications, respectively) 428 371 Noninterest expense (includes $5 and $4 of AOCI reclassifications, respectively) 937 883 Income before income tax expense 566 501 Income tax expense (includes ($5) and $1 income tax net expense from reclassification items, respectively) 127 113 Net income $439 $388

STOCKHOLDERS' EQUITY

STOCKHOLDERS' EQUITY	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
STOCKHOLDERS' EQUITY	NOTE 11 - STOCKHOLDERS’ EQUITY Preferred Stock The following table provides the number of authorized preferred shares, the number of issued and outstanding, the liquidation value per share and the carrying amount: March 31, 2019 December 31, 2018 (in millions, except per share and share data) Liquidation value per share Preferred Shares Carrying Amount Preferred Shares Carrying Amount Authorized ($25 par value) 100,000,000 100,000,000 Issued and outstanding: Series A $1,000 250,000 $247 250,000 $247 Series B 1,000 300,000 296 300,000 296 Series C 1,000 300,000 297 300,000 297 Series D 1,000 (1) 300,000 (2) 292 — — Total 1,150,000 $1,132 850,000 $840 (1) Equivalent to $25 per depositary share. (2) Represented by 12,000,000 depositary shares each representing a 1/40th interest in the Series D Preferred Stock. The following table provides information related to the Company’s preferred stock outstanding as of March 31, 2019 : (in millions, except share data) Preferred Stock (1) Issue Date Number of Shares Outstanding Dividend Dates (2) Annual Per Share Dividend Rate Optional Redemption Date (3) Series A April 6, 2015 250,000 Semi-annually beginning October 6, 2015 until April 6, 2020 5.500% until April 6, 2020 April 6, 2020 Quarterly beginning July 6, 2020 3 Mo. LIBOR plus 3.960% beginning April 6, 2020 Series B May 24, 2018 300,000 Semi-annually beginning January 6, 2019 until July 6, 2023 6.000% until July 6, 2023 July 6, 2023 Quarterly beginning October 6, 2023 3 Mo. LIBOR plus 3.003% beginning July 6, 2023 Series C October 25, 2018 300,000 Quarterly beginning January 6, 2019 until April 6, 2024 6.375% until April 6, 2024 April 6, 2024 Quarterly beginning July 6, 2024 3 Mo. LIBOR plus 3.157% beginning April 6, 2024 Series D January 29, 2019 300,000 (4) Quarterly beginning April 6, 2019 until April 6, 2024 6.350% until April 6, 2024 April 6, 2024 Quarterly beginning July 6, 2024 3 Mo. LIBOR plus 3.642% beginning April 6, 2024 (1) All outstanding series are non-cumulative fixed-to-floating rate perpetual preferred stock. Except in limited circumstances, the preferred stock does not have voting rights. (2) Dividends are payable when, and if, declared by the Company’s Board of Directors or an authorized committee thereof. (3) Redeemable at the Company’s option, in whole or in part, on any dividend payment date on or after the date stated, or in whole but not in part, at any time within 90 days following a regulatory capital treatment event a as defined in the applicable certificate of designations, in each case at a redemption price equal to $1,000 per share (equivalent to $25 per depositary share for the Series D Preferred Stock), plus any declared and unpaid dividends, without accumulation of any undeclared dividends. Under current rules, any redemption is subject to approval by the FRB. (4) Represented by 12,000,000 depositary shares each representing a 1/40th interest in the Series D Preferred Stock. Dividends The following table provides information related to dividends per share and in the aggregate, declared and paid, for each type of stock issued and outstanding: Three Months Ended March 31, 2019 Three Months Ended March 31, 2018 (in millions, except per share data) Dividends Declared per Share Dividends Declared Dividends Paid Dividends Declared per Share Dividends Declared Dividends Paid Common stock $0.32 $149 $149 $0.22 $108 $108 Preferred stock Series A $27.50 $7 $— $27.50 $7 $— Series B — — 11 — — — Series C 15.94 5 4 — — — Series D 11.82 3 — — — — Total preferred stock $15 $15 $7 $— Treasury Stock During the three months ended March 31, 2019 , the Company repurchased $200 million , or 5,823,891 shares, of its outstanding common stock. The repurchased shares are held in treasury stock.

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	3 Months Ended
	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	NOTE 12 - COMMITMENTS AND CONTINGENCIES A summary of outstanding off-balance sheet arrangements is presented below. For more information on these arrangements, see Note 18 “Commitments and Contingencies” to the Company’s audited Consolidated Financial Statements in the Annual Report on Form 10-K for the year ended December 31, 2018. (in millions) March 31, 2019 December 31, 2018 Commitments to extend credit $68,564 $69,553 Letters of credit 2,089 2,125 Marketing rights 37 37 Risk participation agreements 27 19 Loans sold with recourse 22 5 Total $70,739 $71,739 Commitments to Extend Credit Commitments to extend credit are agreements to lend to customers in accordance with conditions contractually agreed upon in advance. Generally, the commitments have fixed expiration dates or termination clauses and may require payment of a fee. Since many of these commitments are expected to expire without being drawn upon, the contract amounts are not necessarily indicative of future cash requirements. In first quarter 2019, the Company entered into an agreement to purchase education loans on a quarterly basis beginning with first quarter 2019 and ending with fourth quarter 2019. The total minimum and maximum amount of the aggregate purchase principal balance of loans under the terms of the agreement are $600 million and $1.0 billion , respectively, and the remaining maximum purchase commitment is $799 million as of March 31, 2019 . The Company’s commercial loan trading desk provides ongoing secondary market support and liquidity to its clients. Unsettled loan trades (i.e., loan purchase contracts) represent firm commitments to purchase loans from a third party at an agreed-upon price. Principal amounts associated with unsettled commercial loan trades are off-balance sheet commitments until delivery of the loans has taken place. The principal balances of unsettled commercial loan trade purchases and sales were $166 million and $234 million , respectively, at March 31, 2019 and $ 68 million and $161 million , respectively, at December 31, 2018 . Letters of Credit Letters of credit in the table above reflect commercial, standby financial and standby performance letters of credit. Standby letters of credit, both financial and performance, are issued by the Company for its customers. They are used as conditional guarantees of payment to a third party in the event the customer either fails to make specific payments (financial) or fails to complete a specific project (performance). The Company’s exposure to credit loss in the event of counterparty nonperformance in connection with the above instruments is represented by the contractual amount of those instruments, net of the value of collateral held. Generally, letters of credit are collateralized by cash, accounts receivable, inventory or investment securities. Credit risk associated with letters of credit is considered in determining the appropriate amounts of reserves for unfunded commitments. Standby letters of credit and commercial letters of credit are issued for terms of up to ten years and one year , respectively. Other Commitments Citizens has additional off-balance sheet arrangements that are summarized below. • Marketing Rights - During 2003, Citizens entered into a 25 -year agreement to acquire the naming and marketing rights of a baseball stadium in Pennsylvania. • Loans sold with recourse - Citizens is an originator and servicer of residential mortgages and routinely sells such mortgage loans in the secondary market and to GSEs. In the context of such sales, the Company makes certain representations and warranties regarding the characteristics of the underlying loans and, as a result, may be contractually required to repurchase such loans or indemnify certain parties against losses for certain breaches of those representations and warranties. The Company also sells the government guaranteed portion of certain SBA loans to outside investors, for which it retains the servicing rights. • Risk Participation Agreements - RPAs are guarantees issued by the Company to other parties for a fee, whereby the Company agrees to participate in the credit risk of a derivative customer of the other party. The current amount of credit exposure is spread out over 86 counterparties. RPAs generally have terms ranging from one to five years; however, certain outstanding agreements have terms as long as nine years. Contingencies The Company operates in a legal and regulatory environment that exposes it to potentially significant risks. A certain amount of litigation ordinarily results from the nature of the Company’s banking and other businesses. The Company is a party to legal proceedings, including class actions. The Company is also the subject of investigations, reviews, subpoenas, and regulatory matters arising out of its normal business operations, which, in some instances, relate to concerns about fair lending, unfair and/or deceptive practices, mortgage-related issues, and mis-selling of certain products. In addition, the Company engages in discussions with relevant governmental and regulatory authorities on a regular and ongoing basis regarding various issues, and any issues discussed or identified may result in investigatory or other action being taken. Litigation and regulatory matters may result in settlements, damages, fines, penalties, public or private censure, increased costs, required remediation, restrictions on business activities, or other impacts on the Company. In these disputes and proceedings, the Company contests liability and the amount of damages as appropriate. Given their complex nature, and based on the Company's experience, it may be years before some of these matters are finally resolved. Moreover, before liability can be reasonably estimated for a claim, numerous legal and factual issues may need to be examined, including through potentially lengthy discovery and determination of important factual matters, and by addressing novel or unsettled legal issues relevant to the proceedings in question. The Company cannot predict with certainty if, how, or when such claims will be resolved or what the eventual settlement, fine, penalty or other relief, if any, may be, particularly for claims that are at an early stage in their development or where claimants seek substantial or indeterminate damages. The Company recognizes a provision for a claim when, in the opinion of management after seeking legal advice, it is probable that a liability exists and the amount of loss can be reasonably estimated. In many proceedings, however, it is not possible to determine whether any loss is probable or to estimate the amount of any loss. Based on information currently available, the advice of legal counsel and other advisers, and established reserves, management believes that the aggregate liabilities, if any, potentially arising from these proceedings will not have a materially adverse effect on the Company’s unaudited interim Consolidated Financial Statements.

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS	3 Months Ended
	Mar. 31, 2019
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENTS	NOTE 13 - FAIR VALUE MEASUREMENTS As discussed in Note 19 “Fair Value Measurements,” to the Company’s audited Consolidated Financial Statements in the Annual Report on Form 10-K for the year ended December 31, 2018, Citizens measures or monitors many of its assets and liabilities on a fair value basis. Fair value is used on a recurring basis for assets and liabilities for which fair value is the required or elected measurement basis of accounting. Additionally, fair value is used on a nonrecurring basis to evaluate assets for impairment or for disclosure purposes. Nonrecurring fair value adjustments typically involve the application of lower of cost or market accounting or write-downs of individual assets. Citizens also applies the fair value measurement guidance to determine amounts reported for certain disclosures in this Note for assets and liabilities that are not required to be reported at fair value in the financial statements. Citizens elected to account for residential mortgage LHFS and certain commercial and commercial real estate LHFS at fair value. Applying fair value accounting to the residential mortgage LHFS better aligns the reported results of the economic changes in the value of these loans and their related economic hedge instruments. Certain commercial and commercial real estate held for sale loans are managed by a commercial secondary loan desk that provides liquidity to banks, finance companies and institutional investors. Applying fair value accounting to this portfolio is appropriate because the Company holds these loans with the intent to sell within the near-term. Fair Value Option Residential Mortgage Loans Held for Sale The fair value of residential mortgage LHFS is derived from observable mortgage security prices and includes adjustments for loan servicing value, agency guarantee fees, and other loan level attributes which are mostly observable in the marketplace. Credit risk does not significantly impact the valuation since these loans are sold shortly after origination. Therefore, the Company classifies the residential mortgage LHFS in Level 2 of the fair value hierarchy. The election of the fair value option for financial assets and financial liabilities is optional and irrevocable. The residential mortgage loans accounted for under the fair value option are initially measured at fair value (i.e., acquisition cost) when the financial asset is acquired. Subsequent changes in fair value are recognized in mortgage banking fees on the Consolidated Statements of Operations. The Company recognized changes in fair value in mortgage banking income of ($1) million and ($3) million for the three months ended March 31, 2019 and 2018 , respectively. Interest income on residential mortgage LHFS is calculated based on the contractual interest rate of the loan and is recorded in interest income. Commercial and Commercial Real Estate Loans Held for Sale The fair value of commercial and commercial real estate LHFS is estimated using observable prices of similar loans that transact in the marketplace. In addition, Citizens uses external pricing services that provide estimates of fair values based on quotes from various dealers transacting in the market, sector curves or benchmarking techniques. Therefore, the Company classifies the commercial and commercial real estate loans managed by the commercial secondary loan desk in Level 2 of the fair value hierarchy given the observable market inputs. There were no loans in this portfolio that were 90 days or more past due or nonaccruing as of March 31, 2019 and December 31, 2018 . The loans accounted for under the fair value option are initially measured at fair value when the financial asset is recognized. Subsequent changes in fair value are recognized in other noninterest income on the Consolidated Statements of Operations. Since all loans in the Company’s commercial trading portfolio consist of floating rate obligations, all changes in fair value are due to changes in credit risk. Such credit-related fair value changes may include observed changes in overall credit spreads and/or changes to the creditworthiness of an individual borrower. Unsettled trades within the commercial trading portfolio are not recognized on the Consolidated Balance Sheets and represent off-balance sheet commitments. Refer to Note 12 "Commitments and Contingencies" for further information. Interest income on commercial and commercial real estate LHFS is calculated based on the contractual interest rate of the loan and is recorded in interest income. Citizens recognized $3 million in other noninterest income related to its commercial trading portfolio for the three months ended March 31, 2019 and $1 million for the three months ended March 31, 2018 . The following table presents the difference between the aggregate fair value and the aggregate unpaid principal balance of LHFS measured at fair value: March 31, 2019 December 31, 2018 (in millions) Aggregate Fair Value Aggregate Unpaid Principal Aggregate Fair Value Less Aggregate Unpaid Principal Aggregate Fair Value Aggregate Unpaid Principal Aggregate Fair Value Less Aggregate Unpaid Principal Residential mortgage loans held for sale, at fair value $1,009 $1,009 $— $967 $967 $— Commercial and commercial real estate loans held for sale, at fair value 177 177 — 252 252 — Recurring Fair Value Measurements Citizens utilizes a variety of valuation techniques to measure its assets and liabilities at fair value. The valuation methodologies used for significant assets and liabilities carried on the balance sheet at fair value on a recurring basis are presented below: Debt Securities Available for Sale The fair value of debt securities classified as AFS is based upon quoted prices, if available. Where observable quoted prices are available in an active market, the security is classified as Level 1 in the fair value hierarchy. Classes of instruments that are valued using this market approach include debt securities issued by the U.S. Treasury. If quoted market prices are not available, the fair value for the security is estimated under the market or income approach using pricing models. These instruments are classified as Level 2 because the inputs to the valuations are observable. The pricing models used to value securities generally begin with observable market prices (or rates) for similar instruments and make adjustments based on the characteristics of the instrument being valued. These adjustments reflect assumptions made regarding the sensitivity of each security’s value to changes in interest rates and prepayment speeds. Classes of instruments that are valued using this market approach include specified pool mortgage “pass-through” securities and other debt securities issued by U.S. GSEs and state and political subdivisions. The pricing models used to value securities under the income approach generally begin with the contractual cash flows of each security and make adjustments based on forecasted prepayment speeds, default rates, and other market-observable information. The adjusted cash flows are then discounted at a rate derived from observed rates of return for comparable assets or liabilities that are traded in the market. Classes of instruments that are valued using this market approach include residential and commercial CMOs. A significant majority of the Company’s Level 1 and 2 debt securities are priced using an external pricing service. Citizens verifies the accuracy of the pricing provided by its primary outside pricing service on a quarterly basis. This process involves using a secondary external vendor to provide valuations for the Company’s securities portfolio for comparison purposes. Any valuation discrepancies beyond established thresholds are researched and, if necessary, corroborated by an independent outside broker. In certain cases where there is limited activity or less transparency around inputs to the valuation model, securities are classified as Level 3. There are no AFS securities valued using significant Level 3 inputs at March 31, 2019 . Residential Loans Held for Sale See the “Fair Value Option, Residential Mortgage Loans Held for Sale” discussion above. Commercial Loans Held for Sale See the “Fair Value Option, Commercial and Commercial Real Estate Loans Held for Sale” discussion above. Mortgage Servicing Rights - Fair Value Method MSRs do not trade in an active market with readily observable prices. MSRs are classified as Level 3 since the valuation methodology utilizes significant unobservable inputs. The fair value was calculated using a discounted cash flow model which used assumptions, including weighted-average life, prepayment assumptions and weighted-average option adjusted spread. 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. In addition, the MSR Policy is approved by the Asset Liability Committee. Refer to Note 5 "Mortgage Banking" for more information. Derivatives The vast majority of the Company’s derivatives portfolio is composed of “plain vanilla” interest rate swaps, which are traded in over-the-counter markets where quoted market prices are not readily available. For these interest rate derivatives, fair value is determined utilizing models that primarily use market observable inputs, such as swap rates and yield curves. The pricing models used to value interest rate swaps calculate the sum of each instrument’s fixed and variable cash flows, which are then discounted using an appropriate yield curve (i.e., LIBOR or Overnight Index Swap curve) to arrive at the fair value of each swap. The pricing models do not contain a high level of subjectivity as the methodologies used do not require significant judgment. Citizens also considers certain adjustments to the modeled price that market participants would make when pricing each instrument, including a credit valuation adjustment that reflects the credit quality of the swap counterparty, as well as factors in the Company’s own credit quality. Citizens incorporates the effect of this exposure by netting its derivative contracts with the available collateral and calculating a valuation adjustment on the overall basis of the net position with the counterparty where permitted. The determination of this adjustment requires judgment on behalf of Company management; however, the total amount of this portfolio-level adjustment is not material to the total fair value of the interest rate swaps in their entirety . Therefore, interest rate swaps are classified as Level 2 in the valuation hierarchy. The fair value of foreign exchange derivatives uses the mid-point of daily quoted currency spot prices as an input to the model. A valuation model estimates fair value based on the quoted spot rates together with interest rate yield curves and forward currency rates. Since all of these inputs are observable in the market, foreign exchange derivatives are classified as Level 2 in the fair value hierarchy. Other contracts primarily consist of interest rate lock commitments, and forward sales commitments of residential MBS used to economically hedge existing mortgage commitments that are pending closure. Forward sales commitments are valued based on the value of similarly situated pools of mortgages trading in the market, adjusted for the unique characteristics of the TBA pool. Since these inputs are observable in the market, these derivatives are classified as Level 2 in the fair value hierarchy. Interest rate lock commitments are valued utilizing internally generated loan closing rate assumptions, which are a significant unobservable input, and therefore are classified as Level 3 in the fair value hierarchy. Money Market Mutual Fund Investments Fair value is determined based upon unadjusted quoted market prices and is considered a Level 1 fair value measurement. The following table presents assets and liabilities measured at fair value, including gross derivative assets and liabilities on a recurring basis at March 31, 2019 : (in millions) Total Level 1 Level 2 Level 3 Debt securities available for sale: Mortgage-backed securities $21,427 $— $21,427 $— State and political subdivisions 5 — 5 — U.S. Treasury and other 72 72 — — Total debt securities available for sale 21,504 72 21,432 — Loans held for sale, at fair value: Residential loans held for sale 1,009 — 1,009 — Commercial loans held for sale 177 — 177 — Total loans held for sale, at fair value 1,186 — 1,186 — Mortgage servicing rights 563 — — 563 Derivative assets: Interest rate contracts 443 — 443 — Foreign exchange contracts 135 — 135 — Other contracts 19 — 1 18 Total derivative assets 597 — 579 18 Equity securities, at fair value: Money market mutual fund investments 198 198 — — Total equity securities, at fair value 198 198 — — Total assets $24,048 $270 $23,197 $581 Derivative liabilities: Interest rate contracts $160 $— $160 $— Foreign exchange contracts 113 — 113 — Other contracts 21 — 21 — Total derivative liabilities 294 — 294 — Total liabilities $294 $— $294 $— The following table presents assets and liabilities measured at fair value, including gross derivative assets and liabilities on a recurring basis at December 31, 2018 : (in millions) Total Level 1 Level 2 Level 3 Debt securities available for sale: Mortgage-backed securities $19,866 $— $19,866 $— State and political subdivisions 5 — 5 — U.S. Treasury and other 24 24 — — Total debt securities available for sale 19,895 24 19,871 — Loans held for sale, at fair value: Residential loans held for sale 967 — 967 — Commercial loans held for sale 252 — 252 — Total loans held for sale, at fair value 1,219 — 1,219 — Mortgage servicing rights 600 — — 600 Derivative assets: Interest rate contracts 306 — 306 — Foreign exchange contracts 129 — 129 — Other contracts 14 — 14 — Total derivative assets 449 — 449 — Equity securities, at fair value: Money market mutual fund investments 181 181 — — Total equity securities, at fair value 181 181 — — Total assets $22,344 $205 $21,539 $600 Derivative liabilities: Interest rate contracts $277 $— $277 $— Foreign exchange contracts 113 — 113 — Other contracts 25 — 25 — Total derivative liabilities 415 — 415 — Total liabilities $415 $— $415 $— The following tables present a rollforward of the balance sheet amounts for assets measured at fair value on a recurring basis and classified as Level 3 for the three months ended March 31, 2019. There were no assets measured at fair value on a recurring basis and classified as Level 3 for the three months ended March 31, 2018. For the Three Months Ended March 31, (in millions) Mortgage Servicing Rights Other Derivative Contracts Balance at January 1, 2019 $600 $— Amount capitalized 35 — Change in unpaid principal balance during the period (1) (26 ) — Change in fair value during the period (2) (46 ) — Transfers from Level 2 to Level 3 (3) — 18 Balance at March 31, 2019 $563 $18 (1) Represents changes in value of the MSRs due to i) passage of time including the impact from both regularly scheduled loan principal payments and partial paydowns, and ii) loans that paid off during the period. (2) Represents changes in value primarily due to market driven changes in interest rates and prepayment speeds. (3) Reflects changes in the significance of unobservable inputs on derivative contracts associated with mortgage origination activities. Nonrecurring Fair Value Measurements Fair value is also used on a nonrecurring basis to evaluate certain assets for impairment or for disclosure purposes. Examples of nonrecurring uses of fair value include MSRs accounted for by the amortization method and loan impairments for certain loans and leases. The following valuation techniques are utilized to measure significant assets for which the Company utilizes fair value on a nonrecurring basis: Impaired Loans The carrying amount of collateral-dependent impaired loans is compared to the appraised value of the collateral less costs to dispose and is classified as Level 2. Any excess of carrying amount over the appraised value is charged to the ALLL. Mortgage Servicing Rights - Amortization Method MSRs do not trade in an active market with readily observable prices. MSRs are classified as Level 3 since the valuation methodology utilizes significant unobservable inputs. The fair value was calculated using a discounted cash flow model which used assumptions, including weighted-average life, weighted-average constant prepayment rate and weighted-average discount rate. Refer to Note 5 "Mortgage Banking" for more information. See also Note 8 “Mortgage Banking” to the Company’s audited Consolidated Financial Statements in the Annual Report on Form 10-K for the year ended December 31, 2018. Foreclosed Assets Foreclosed assets consist primarily of residential properties. Foreclosed assets are carried at the lower of cost or fair value less costs to sell. Fair value is based upon independent market prices or appraised values of the collateral and is classified as Level 2. Leased Assets The fair value of assets under operating leases is determined using collateral specific pricing digests, external appraisals, broker opinions, recent sales data from industry equipment dealers, and discounted cash flows derived from the underlying lease agreement. As market data for similar assets and lease agreements is available and used in the valuation, these assets are classified as Level 2 fair value measurement. The following table presents gains (losses) on assets and liabilities measured at fair value on a nonrecurring basis and recorded in earnings: Three Months Ended March 31, (in millions) 2019 2018 Impaired collateral-dependent loans ($4 ) ($2 ) MSRs — 3 Foreclosed assets — (1 ) Leased assets (3 ) — The following table presents assets and liabilities measured at fair value on a nonrecurring basis: March 31, 2019 December 31, 2018 (in millions) Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Impaired collateral-dependent loans $371 $— $371 $— $338 $— $338 $— MSRs 224 — — 224 243 — — 243 Foreclosed assets 29 — 29 — 29 — 29 — Leased assets 91 — 91 — 92 — 92 — The following table presents the estimated fair value for financial instruments not recorded at fair value in the unaudited interim Consolidated Financial Statements. The carrying amounts are recorded in the Consolidated Balance Sheets under the indicated captions: March 31, 2019 Total Level 1 Level 2 Level 3 (in millions) Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Financial assets: Securities held to maturity $3,345 $3,267 $— $— $3,345 $3,267 $— $— Equity securities, at cost 604 604 — — 604 604 — — Other loans held for sale 66 66 — — — — 66 66 Loans and leases 117,615 117,862 — — 371 371 117,244 117,491 Financial liabilities: Deposits 123,916 123,875 — — 123,916 123,875 — — Federal funds purchased and securities sold under agreements to repurchase 668 668 — — 668 668 — — Other short-term borrowed funds 11 11 — — 11 11 — — Long-term borrowed funds 11,725 11,767 — — 11,725 11,767 — — December 31, 2018 Total Level 1 Level 2 Level 3 (in millions) Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Financial assets: Securities held to maturity $4,165 $4,041 $— $— $4,165 $4,041 $— $— Equity securities, at cost 834 834 — — 834 834 — — Other loans held for sale 101 101 — — — — 101 101 Loans and leases 116,660 116,627 — — 338 338 116,322 116,289 Financial liabilities: Deposits 119,575 119,503 — — 119,575 119,503 — — Federal funds purchased and securities sold under agreements to repurchase 1,156 1,156 — — 1,156 1,156 — — Other short-term borrowed funds 161 161 — — 161 161 — — Long-term borrowed funds 15,925 15,877 — — 15,925 15,877 — —

NONINTEREST INCOME

NONINTEREST INCOME	3 Months Ended
	Mar. 31, 2019
Other Income and Expenses [Abstract]
NONINTEREST INCOME	NOTE 14 - NONINTEREST INCOME Revenues from Contracts with Customers The following table presents the components of revenue from contracts with customers disaggregated by revenue stream and business operating segment: Three Months Ended March 31, 2019 Three Months Ended March 31, 2018 (in millions) Consumer Banking Commercial Banking Consolidated (1) Consumer Banking Commercial Banking Consolidated (1) Service charges and fees $97 $26 $123 $98 $26 $124 Card fees 50 9 59 52 9 61 Capital markets fees — 49 49 — 37 37 Trust and investment services fees 47 — 47 40 — 40 Other banking fees — 2 2 — 3 3 Total revenue from contracts with customers $194 $86 $280 $190 $75 $265 (1) There is no revenue from contracts with customers included in Other non-segment operations. For the three months ended March 31, 2019 and 2018 , the Company recognized trailing commissions of $4 million related to services provided in previous reporting periods. Fees from other investment services are recognized at a point in time upon completion of the service. Revenue from Other Sources Three Months Ended March 31, (in millions) 2019 2018 Bank-owned life insurance $14 $14

OTHER OPERATING EXPENSE

OTHER OPERATING EXPENSE	3 Months Ended
	Mar. 31, 2019
Other Income and Expenses [Abstract]
OTHER OPERATING EXPENSE	NOTE 15 - OTHER OPERATING EXPENSE The following table presents the details of other operating expense: Three Months Ended March 31, (in millions) 2019 2018 Deposit insurance $16 $31 Promotional expense 27 25 Settlements and operating losses 11 12 Other 56 52 Other operating expense $110 $120

EARNINGS PER SHARE

EARNINGS PER SHARE	3 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
EARNINGS PER SHARE	NOTE 16 - EARNINGS PER SHARE Three Months Ended March 31, (in millions, except share and per share data) 2019 2018 Numerator (basic and diluted): Net income $439 $388 Less: Preferred stock dividends 15 7 Net income available to common stockholders $424 $381 Denominator: Weighted-average common shares outstanding - basic 460,713,172 487,500,618 Dilutive common shares: share-based awards 1,807,508 1,766,208 Weighted-average common shares outstanding - diluted 462,520,680 489,266,826 Earnings per common share: Basic $0.92 $0.78 Diluted (1) 0.92 0.78 (1) Potential dilutive common shares are excluded from the computation of diluted EPS in the periods where the effect would be antidilutive. Excluded from the computation of diluted EPS were antidilutive shares totaling 1 million for the three months ended March 31, 2019 . There were no antidilutive shares for the three months ended March 31, 2018 .

BUSINESS OPERATING SEGMENTS

BUSINESS OPERATING SEGMENTS	3 Months Ended
	Mar. 31, 2019
Segment Reporting [Abstract]
BUSINESS OPERATING SEGMENTS	NOTE 17 - BUSINESS OPERATING SEGMENTS Citizens is managed by its Chief Executive Officer on a segment basis. The Company’s two business operating segments are Consumer Banking and Commercial Banking. The business segments are determined based on the products and services provided, or the type of customer served. Each segment has one or more segment heads who report directly to the Chief Executive Officer. The Chief Executive Officer has final authority over resource allocation decisions and performance assessment. The business segments reflect this management structure and the manner in which financial information is currently evaluated by the Chief Executive Officer. Reportable Segments Segment results are determined based upon the Company’s management reporting system, which assigns balance sheet and statement of operations items to each of the business segments. The process is designed around the Company’s organizational and management structure and accordingly, the results derived are not necessarily comparable with similar information published by other financial institutions. A description of each reportable segment and table of financial results is presented below: Consumer Banking The Consumer Banking segment focuses on retail customers and small businesses with annual revenues of up to $25 million . It offers traditional banking products and services, including checking, savings, home loans, education loans, credit cards, business loans, and unsecured product finance and personal loans in addition to financial management services. It also operates an indirect auto financing business, providing financing for both new and used vehicles through auto dealerships. The segment’s distribution channels include a branch network, ATMs and a work force of experienced specialists ranging from financial consultants, mortgage loan officers and business banking officers to private bankers. The Company’s Consumer Banking value proposition is based on providing simple, easy to understand product offerings and a convenient banking experience with a more personalized approach. Commercial Banking The Commercial Banking segment primarily targets companies with annual revenues from $25 million to $3.0 billion and provides a full complement of financial products and solutions, including loans, leases, trade financing, deposits, cash management, commercial cards, foreign exchange, interest rate risk management, corporate finance and capital markets advisory capabilities. It focuses on middle-market companies, large corporations and institutions and has dedicated teams with industry expertise in government banking, not-for-profit, healthcare, technology, professionals, oil and gas, asset finance, franchise finance, asset-based lending, commercial real estate, private equity and sponsor finance. While the segment’s business development efforts are predominantly focused in the Company’s footprint, some of its specialized industry businesses also operate selectively on a national basis (such as healthcare, asset finance and franchise finance). A key component of Commercial Banking’s growth strategy is to bring ideas to clients that help their businesses thrive, and in doing so, expand the loan portfolio and ancillary product sales. Non-segment Operations Other Non-segment operations are classified as Other, which includes corporate functions, the Treasury function, the securities portfolio, wholesale funding activities, intangible assets not directly allocated to a business operating segment, community development, non-core assets (including legacy Royal Bank of Scotland Group plc aircraft loans and leases placed in runoff in the third quarter of 2016), and other unallocated assets, liabilities, capital, revenues, provision for credit losses, and expenses including income tax expense. In addition to non-segment operations, Other includes goodwill not directly allocated to a business operating segment and any associated goodwill impairment charges. For impairment testing purposes, the Company allocates all goodwill to its Consumer Banking and/or Commercial Banking reporting units. As of and for the Three Months Ended March 31, 2019 (in millions) Consumer Banking Commercial Banking Other Consolidated Net interest income $788 $372 $— $1,160 Noninterest income 247 150 31 428 Total revenue 1,035 522 31 1,588 Noninterest expense 700 209 28 937 Profit before provision for credit losses 335 313 3 651 Provision for credit losses 67 21 (3 ) 85 Income before income tax expense (benefit) 268 292 6 566 Income tax expense (benefit) 66 65 (4 ) 127 Net income $202 $227 $10 $439 Total average assets $65,007 $55,630 $39,778 $160,415 As of and for the Three Months Ended March 31, 2018 (in millions) Consumer Banking Commercial Banking Other Consolidated Net interest income $733 $357 $1 $1,091 Noninterest income 222 125 24 371 Total revenue 955 482 25 1,462 Noninterest expense 656 208 19 883 Profit before provision for credit losses 299 274 6 579 Provision for credit losses 72 (4 ) 10 78 Income (loss) before income tax expense (benefit) 227 278 (4 ) 501 Income tax expense (benefit) 57 63 (7 ) 113 Net income $170 $215 $3 $388 Total average assets $61,348 $50,393 $39,782 $151,523 There have been no significant changes in the management accounting practices utilized by the Company regarding the basis of presentation for segment results as discussed in Note 25 “Business Operating Segments,” to the Company’s audited Consolidated Financial Statements in the Annual Report on Form 10-K for the year ended December 31, 2018.

BASIS OF PRESENTATION (Policies

BASIS OF PRESENTATION (Policies)	3 Months Ended
	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	The unaudited interim Consolidated Financial Statements, including the Notes thereto of Citizens Financial Group, Inc., have been prepared in accordance with GAAP interim reporting requirements, and therefore do not include all information and Notes included in the audited Consolidated Financial Statements in conformity with GAAP. These unaudited interim Consolidated Financial Statements and Notes thereto should be read in conjunction with the Company’s audited Consolidated Financial Statements and accompanying Notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018. The Company’s principal business activity is banking, conducted through its sole banking subsidiary, Citizens Bank, National Association.
Consolidation	The unaudited interim Consolidated Financial Statements include the accounts of the Company and subsidiaries in which the Company has a controlling financial interest. All intercompany transactions and balances have been eliminated. The Company has evaluated its unconsolidated entities and does not believe that any entity in which it has an interest, but does not currently consolidate, meets the requirements to be consolidated as a variable interest entity. The unaudited interim Consolidated Financial Statements include all adjustments, consisting of normal recurring adjustments, necessary for a fair presentation of the results for the interim periods. The results for interim periods are not necessarily indicative of results for a full year.
Use of Estimates	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change in the near-term relate to the determination of the ACL and the fair value of MSRs.
Adopted and Pending Accounting Pronouncements	Accounting Pronouncements Adopted in 2019 Pronouncement Summary of Guidance Effects on Financial Statements Derivatives and Hedging Issued August 2017 • Reduces the complexity and operational burdens of the current hedge accounting model and portrays more clearly the effects of hedge accounting in the financial statements. • Modifies current requirements to facilitate the application of hedge accounting to partial-term hedges, hedges of prepayable financial instruments, and other strategies. Adoption of these optional changes would occur on a prospective basis. • Requires the effects of fair value hedges to be classified in the same income statement line as the earnings effect of the hedged item. Adoption of this change will occur on a prospective basis. • Requires all effects of cash flow hedges to be deferred in other comprehensive income until the hedged cash flows affect earnings. Periodic hedge ineffectiveness will no longer be recognized in earnings. Adoption of this change will occur on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. • The Company adopted the new standard on January 1, 2019 under the modified retrospective method. • Adoption did not have a material impact on the Company’s Consolidated Financial Statements. • Required disclosures are included in Note 9 “Derivatives”. Leases Issued February 2016 • Requires lessees to recognize a right-of-use asset and corresponding lease liability for all leases with a lease term of greater than one year. • Requires lessees and lessors to classify most leases using principles similar to existing lease accounting, but eliminates the “bright line” classification tests. • Requires that for finance leases, a lessee recognize interest expense on the lease liability separately from the amortization of the right-of-use asset in the Consolidated Statements of Operations, while for operating leases, such amounts should be recognized as a combined expense. • Requires expanded disclosures about the nature and terms of lease agreements. • Provides the option to adopt using either a modified cumulative-effect approach wherein the guidance is applied to all periods presented, or through a cumulative-effect adjustment beginning in the period of adoption. • Requires companies with land easements to assess whether the easement meets the definition of a lease before applying other accounting guidance. • The Company adopted the new standard under the modified retrospective approach on January 1, 2019, which is applicable to both its leasing finance business as well as property and equipment leases in which Citizens is lessee. • Adoption resulted in a cumulative-effect adjustment of $12 million, net of taxes, to retained earnings related to leases in which Citizens is lessee. • Adoption resulted in the recognition of a right-of-use asset and corresponding lease liability of $734 million and $749 million, respectively in its Consolidated Balance Sheet as of March 31, 2019 for non-cancelable operating lease agreements. • Required lessor disclosures are included in Note 3 “Loans and Leases” and required lessee disclosures are included in Note 6 “Leases”. Implementation Costs Incurred in a Cloud Computing Arrangement Issued August 2018 • Requires implementation costs incurred in a cloud computing arrangement that is a service contract be deferred and recognized over the term of the arrangement if those costs would be capitalized in a software licensing arrangement. • Requires amortization expense be presented in the same income statement line item as the related hosting service arrangement expense. • Permits adoption prospectively for all implementation costs incurred after adoption or retrospectively through a cumulative-effect adjustment as of the beginning of the first period presented. • The Company prospectively adopted the new standard on January 1, 2019. • Adoption did not have a material impact on the Company’s Consolidated Financial Statements. Accounting Pronouncements Pending Adoption Pronouncement Summary of Guidance Effects on Financial Statements Financial Instruments - Credit Losses Issued June 2016 • Replaces existing incurred loss impairment guidance and establishes a single allowance framework for financial assets carried at amortized cost (including securities HTM), which will reflect management’s estimate of credit losses over the full remaining expected life of the financial assets. • Amends existing impairment guidance for securities AFS to incorporate an allowance, which will allow for reversals of impairment losses in the event that the credit of an issuer improves. • Requires a cumulative-effect adjustment to retained earnings as of the beginning of the reporting period of adoption. • Required effective date: January 1, 2020. • A company-wide, cross-discipline governance structure is in place to implement the new standard. The Company is currently identifying and researching key interpretive issues, revising policies and procedures, and completing the development, configuration and validation of loss forecasting models to meet the requirements of the new guidance. The implementation team is also in the process of assessing forecast accuracy, qualitative factors, how the reasonable and supportable forecast period will be determined and documented, as well as the impacts of that decision in different parts of the credit cycle. • Analytical testing of the models started in the first quarter of 2019, and parallel testing is expected to begin early in the second half of 2019. • The Company expects the standard will result in earlier recognition of credit losses and an overall increase in the ACL, as it will cover estimated credit losses over the full remaining expected life of loans and commitments and will consider future reasonable and supportable changes in macroeconomic conditions. Since the magnitude of the increase in the Company’s ACL will be impacted by economic conditions, forecasted economic conditions, credit quality and trends in the Company’s portfolio at the time of adoption, the quantitative impact cannot yet be reasonably estimated. Disclosure Requirements - Fair Value Measurements Issued August 2018 • Amends disclosure requirements on fair value measurements. • The guidance eliminates requirements for certain disclosures that are no longer considered relevant or cost beneficial, requires new disclosures and modifies existing disclosures that are expected to enhance the usefulness of the financial statements. • Prospective application is required for new disclosure requirements. • Retrospective application is required for all other amendments for all periods presented. • Required effective date: January 1, 2020. Early adoption is permitted. The Company does not intend to adopt this guidance prior to the required effective date. • Adoption is not expected to have a material impact on the Company’s Consolidated Financial Statements.

SECURITIES (Tables)

SECURITIES (Tables)	3 Months Ended
	Mar. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Schedule of securities held	The following table presents the major components of securities at amortized cost and fair value: March 31, 2019 December 31, 2018 (in millions) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury and other $72 $— $— $72 $24 $— $— $24 State and political subdivisions 5 — — 5 5 — — 5 Mortgage-backed securities: Federal agencies and U.S. government sponsored entities 20,768 66 (337 ) 20,497 20,211 28 (605 ) 19,634 Other/non-agency 916 18 (4 ) 930 236 3 (7 ) 232 Total mortgage-backed securities, at fair value 21,684 84 (341 ) 21,427 20,447 31 (612 ) 19,866 Total debt securities available for sale, at fair value $21,761 $84 ($341 ) $21,504 $20,476 $31 ($612 ) $19,895 Federal agencies and U.S. government sponsored entities $3,345 $1 ($79 ) $3,267 $3,425 $— ($132 ) $3,293 Other/non-agency — — — — 740 8 — 748 Total mortgage-backed securities, at cost 3,345 1 (79 ) 3,267 4,165 8 (132 ) 4,041 Total debt securities held to maturity $3,345 $1 ($79 ) $3,267 $4,165 $8 ($132 ) $4,041 Money market mutual fund investments $198 $— $— $198 $181 $— $— $181 Total equity securities, at fair value $198 $— $— $198 $181 $— $— $181 Federal Reserve Bank stock $463 $— $— $463 $463 $— $— $463 Federal Home Loan Bank stock 133 — — 133 364 — — 364 Other equity securities 8 — — 8 7 — — 7 Total equity securities, at cost $604 $— $— $604 $834 $— $— $834
Schedule of investments classified by maturity date	The amortized cost and fair value of debt securities by contractual maturity as of March 31, 2019 are presented below. Expected maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations with or without incurring penalties. March 31, 2019 Distribution of Maturities (in millions) 1 Year or Less 1-5 Years 5-10 Years After 10 Years Total Amortized cost: U.S. Treasury and other $72 $— $— $— $72 State and political subdivisions — — — 5 5 Mortgage-backed securities: Federal agencies and U.S. government sponsored entities — 251 1,641 18,876 20,768 Other/non-agency 2 8 — 906 916 Total debt securities available for sale 74 259 1,641 19,787 21,761 Mortgage-backed securities: Federal agencies and U.S. government sponsored entities — — — 3,345 3,345 Total debt securities held to maturity — — — 3,345 3,345 Total amortized cost of debt securities $74 $259 $1,641 $23,132 $25,106 Fair value: U.S. Treasury and other $72 $— $— $— $72 State and political subdivisions — — — 5 5 Mortgage-backed securities: Federal agencies and U.S. government sponsored entities — 247 1,634 18,616 20,497 Other/non-agency 2 8 — 920 930 Total debt securities available for sale 74 255 1,634 19,541 21,504 Mortgage-backed securities: Federal agencies and U.S. government sponsored entities — — — 3,267 3,267 Total debt securities held to maturity — — — 3,267 3,267 Total fair value of debt securities $74 $255 $1,634 $22,808 $24,771
Schedule of income recognized on investment securities	Realized gains and losses on securities are presented below: Three Months Ended March 31, (in millions) 2019 2018 Gains on sale of debt securities $8 $8 Losses on sale of debt securities — — Debt securities gains, net $8 $8
Schedule of financial instruments owned and pledged as collateral	The amortized cost and fair value of debt securities pledged are presented below: March 31, 2019 December 31, 2018 (in millions) Amortized Cost Fair Value Amortized Cost Fair Value Pledged against repurchase agreements $294 $294 $344 $338 Pledged against FHLB borrowed funds — — 745 752 Pledged against derivatives, to qualify for fiduciary powers, and to secure public and other deposits as required by law 3,306 3,248 3,592 3,460
Schedule of unrealized loss on investments	The following tables present mortgage-backed debt securities whose fair values are below carrying values, segregated by those that have been in a continuous unrealized loss position for less than twelve months and those that have been in a continuous unrealized loss position for twelve months or longer: March 31, 2019 Less than 12 Months 12 Months or Longer Total (dollars in millions) Number of Issues Fair Value Gross Unrealized Losses Number of Issues Fair Value Gross Unrealized Losses Number of Issues Fair Value Gross Unrealized Losses Federal agencies and U.S. government sponsored entities 13 $569 ($1 ) 519 $17,548 ($415 ) 532 $18,117 ($416 ) Other/non-agency — — — 7 48 (4 ) 7 48 (4 ) Total 13 $569 ($1 ) 526 $17,596 ($419 ) 539 $18,165 ($420 ) December 31, 2018 Less than 12 Months 12 Months or Longer Total (dollars in millions) Number of Issues Fair Value Gross Unrealized Losses Number of Issues Fair Value Gross Unrealized Losses Number of Issues Fair Value Gross Unrealized Losses Federal agencies and U.S. government sponsored entities 166 $4,881 ($89 ) 429 $15,124 ($648 ) 595 $20,005 ($737 ) Other/non-agency 10 139 (1 ) 11 72 (6 ) 21 211 (7 ) Total 176 $5,020 ($90 ) 440 $15,196 ($654 ) 616 $20,216 ($744 )
Schedule of credit losses recognized in earnings	The following table presents the cumulative credit-related losses recognized in earnings on debt securities held by the Company: Three Months Ended March 31, (in millions) 2019 2018 Cumulative balance at beginning of period $81 $80 Credit impairments recognized in earnings on debt securities that have been previously impaired 1 1 Reductions due to increases in cash flow expectations on impaired debt securities (1) — (1 ) Reductions for securities sold during the period (2) (4 ) — Cumulative balance at end of period $78 $80 (1) Reported in interest income from investment securities on the Consolidated Statements of Operations. (2) Reported in securities gains, net on the Consolidated Statements of Operations.

LOANS AND LEASES (Tables)

LOANS AND LEASES (Tables)	3 Months Ended
	Mar. 31, 2019
Receivables [Abstract]
Schedule of loans and leases	A summary of the loans and leases portfolio is presented below: (in millions) March 31, 2019 December 31, 2018 Commercial (1) $41,497 $40,857 Commercial real estate 13,372 13,023 Leases 2,820 2,903 Total commercial loans and leases 57,689 56,783 Residential mortgages 19,174 18,978 Home equity loans 1,006 1,073 Home equity lines of credit 12,394 12,710 Home equity loans serviced by others 375 399 Home equity lines of credit serviced by others 95 104 Automobile 11,992 12,106 Education 9,274 8,900 Credit cards 1,982 1,991 Other retail 3,634 3,616 Total retail loans (2) 59,926 59,877 Total loans and leases (3) $117,615 $116,660 (1) SBA loans serviced for others by our subsidiaries are not included above and amounted to $17 million representing the government guaranteed portion of SBA loans sold to outside investors as of March 31, 2019 . There were no SBA loans serviced for others as of December 31, 2018 . (2) Mortgage loans serviced for others by the Company’s subsidiaries are not included above and amounted to $70.8 billion and $69.6 billion at March 31, 2019 and December 31, 2018 , respectively. (3) Excluded from the table above are LHFS totaling $1.3 billion as of March 31, 2019 and December 31, 2018 .
Components of net investments in direct finance leases	The components of the net investment in direct finance leases, before ALLL, are presented below: (in millions) March 31, 2019 Total future minimum lease rentals $1,955 Estimated residual value of leased equipment (non-guaranteed) 1,082 Initial direct costs 13 Unearned income (259 ) Total leases $2,791
Maturity analysis of direct financing lease receivables	A maturity analysis of direct financing lease receivables at March 31, 2019 is presented below: (in millions) 2019 $439 2020 463 2021 344 2022 263 2023 188 Thereafter 258 Total undiscounted future minimum lease rentals $1,955

ALLOWANCE FOR CREDIT LOSSES, _2

ALLOWANCE FOR CREDIT LOSSES, NONPERFORMING ASSETS, AND CONCENTRATIONS OF CREDIT RISK (Tables)	3 Months Ended
	Mar. 31, 2019
Receivables [Abstract]
Schedule of changes in the allowance for credit losses	A summary of changes in the ACL is presented below: Three Months Ended March 31, 2019 (in millions) Commercial Retail Total Allowance for loan and lease losses, beginning of period $690 $552 $1,242 Charge-offs (26 ) (112 ) (138 ) Recoveries 2 47 49 Net charge-offs (24 ) (65 ) (89 ) Provision charged to income 25 67 92 Allowance for loan and lease losses, end of period 691 554 1,245 Reserve for unfunded lending commitments, beginning of period 91 — 91 Provision for unfunded lending commitments (7 ) — (7 ) Reserve for unfunded lending commitments, end of period 84 — 84 Total allowance for credit losses, end of period $775 $554 $1,329 Three Months Ended March 31, 2018 (in millions) Commercial Retail Total Allowance for loan and lease losses, beginning of period $685 $551 $1,236 Charge-offs (3 ) (113 ) (116 ) Recoveries 6 40 46 Net charge-offs 3 (73 ) (70 ) Provision charged to income 23 57 80 Allowance for loan and lease losses, end of period 711 535 1,246 Reserve for unfunded lending commitments, beginning of period 88 — 88 Provision for unfunded lending commitments (2 ) — (2 ) Reserve for unfunded lending commitments, end of period 86 — 86 Total allowance for credit losses, end of period $797 $535 $1,332
Schedule of loans and leases based on evaluation method	The recorded investment in loans and leases based on the Company’s evaluation methodology is presented below: March 31, 2019 December 31, 2018 (in millions) Commercial Retail Total Commercial Retail Total Individually evaluated $386 $696 $1,082 $391 $723 $1,114 Formula-based evaluation 57,303 59,230 116,533 56,392 59,154 115,546 Total loans and leases $57,689 $59,926 $117,615 $56,783 $59,877 $116,660
Schedule of allowance for credit losses by evaluation method	A summary of the ACL by evaluation method is presented below: March 31, 2019 December 31, 2018 (in millions) Commercial Retail Total Commercial Retail Total Individually evaluated $42 $25 $67 $38 $26 $64 Formula-based evaluation 733 529 1,262 743 526 1,269 Allowance for credit losses $775 $554 $1,329 $781 $552 $1,333
Schedule of classes of commercial loans and leases based on regulatory classifications	The recorded investment in commercial loans and leases based on regulatory classification ratings is presented below: March 31, 2019 Criticized (in millions) Pass Special Mention Substandard Doubtful Total Commercial $39,296 $1,096 $892 $213 $41,497 Commercial real estate 12,953 381 36 2 13,372 Leases 2,670 111 39 — 2,820 Total commercial loans and leases $54,919 $1,588 $967 $215 $57,689 December 31, 2018 Criticized (in millions) Pass Special Mention Substandard Doubtful Total Commercial $38,600 $1,231 $828 $198 $40,857 Commercial real estate 12,523 412 82 6 13,023 Leases 2,823 39 41 — 2,903 Total commercial loans and leases $53,946 $1,682 $951 $204 $56,783
Schedule of retail loan investments categorized by delinquency status	The recorded investment in classes of retail loans, categorized by delinquency status is presented below: March 31, 2019 Days Past Due (in millions) Current 1-29 30-59 60-89 90 or More Total Residential mortgages $18,876 $119 $38 $10 $131 $19,174 Home equity loans 883 80 12 4 27 1,006 Home equity lines of credit 11,769 366 76 28 155 12,394 Home equity loans serviced by others 332 22 8 2 11 375 Home equity lines of credit serviced by others 67 14 2 1 11 95 Automobile 10,654 1,067 196 58 17 11,992 Education 9,084 142 22 12 14 9,274 Credit cards 1,879 59 14 9 21 1,982 Other retail 3,502 75 27 17 13 3,634 Total retail loans $57,046 $1,944 $395 $141 $400 $59,926 December 31, 2018 Days Past Due (in millions) Current 1-29 30-59 60-89 90 or More Total Residential mortgages $18,664 $131 $37 $13 $133 $18,978 Home equity loans 945 75 12 3 38 1,073 Home equity lines of credit 12,042 386 65 22 195 12,710 Home equity loans serviced by others 355 21 7 3 13 399 Home equity lines of credit serviced by others 79 15 2 1 7 104 Automobile 10,729 1,039 207 59 72 12,106 Education 8,694 159 23 13 11 8,900 Credit cards 1,894 53 14 10 20 1,991 Other retail 3,481 76 26 18 15 3,616 Total retail loans $56,883 $1,955 $393 $142 $504 $59,877
Schedule of nonperforming loans and leases by class	The following table presents nonperforming loans and leases and loans accruing and 90 days or more past due: Nonperforming Accruing and 90 days or more past due (in millions) March 31, 2019 December 31, 2018 March 31, 2019 December 31, 2018 Commercial $208 $194 $1 $1 Commercial real estate 4 7 — — Leases — — — — Total commercial loans and leases 212 201 1 1 Residential mortgages (1) 138 136 20 15 Home equity loans 42 50 — — Home equity lines of credit 217 231 — — Home equity loans serviced by others 15 17 — — Home equity lines of credit serviced by others 14 15 — — Automobile 70 81 — — Education 43 38 2 2 Credit card 22 20 — — Other retail 7 8 9 7 Total retail loans 568 596 31 24 Total $780 $797 $32 $25 (1) Nonperforming balances exclude first lien residential mortgage loans that are 100% guaranteed by the Federal Housing Administration. These loans, which are accruing and 90 days or more past due, totaled $13 million and $12 million as of March 31, 2019 and December 31, 2018 , respectively. Nonperforming balances also exclude guaranteed residential mortgage loans sold to GNMA for which the Company has the right, but not the obligation, to repurchase. These loans totaled $144 million and $133 million as of March 31, 2019 and December 31, 2018 , respectively. These loans are included in the Company’s Consolidated Balance Sheets.
Summary of key performance indicators	A summary of nonperforming loan and lease key performance indicators is presented below: March 31, 2019 December 31, 2018 Nonperforming commercial loans and leases as a percentage of total loans and leases 0.18 % 0.17 % Nonperforming retail loans as a percentage of total loans and leases 0.48 0.51 Nonperforming loans and leases as a percentage of total loans and leases 0.66 % 0.68 % Nonperforming commercial assets as a percentage of total assets 0.13 % 0.13 % Nonperforming retail assets as a percentage of total assets 0.37 0.39 Nonperforming assets as a percentage of total assets 0.50 % 0.52 %
Analysis of age of past due amounts	An analysis of the age of both accruing and nonaccruing loan and lease past due amounts is presented below: March 31, 2019 December 31, 2018 Days Past Due Days Past Due (in millions) 30-59 60-89 90 or More Total 30-59 60-89 90 or More Total Commercial $70 $9 $71 $150 $85 $3 $78 $166 Commercial real estate 56 65 2 123 8 32 5 45 Leases 8 — — 8 7 — — 7 Total commercial loans and leases 134 74 73 281 100 35 83 218 Residential mortgages 38 10 131 179 37 13 133 183 Home equity loans 12 4 27 43 12 3 38 53 Home equity lines of credit 76 28 155 259 65 22 195 282 Home equity loans serviced by others 8 2 11 21 7 3 13 23 Home equity lines of credit serviced by others 2 1 11 14 2 1 7 10 Automobile 196 58 17 271 207 59 72 338 Education 22 12 14 48 23 13 11 47 Credit cards 14 9 21 44 14 10 20 44 Other retail 27 17 13 57 26 18 15 59 Total retail loans 395 141 400 936 393 142 504 1,039 Total $529 $215 $473 $1,217 $493 $177 $587 $1,257
Schedule of impaired loans by class	A summary of impaired loans by class is presented below: March 31, 2019 (in millions) Impaired Loans With a Related Allowance Allowance on Impaired Loans Impaired Loans Without a Related Allowance Unpaid Contractual Balance Total Recorded Investment in Impaired Loans Commercial $195 $42 $165 $415 $360 Commercial real estate — — 26 46 26 Leases — — — — — Total commercial loans and leases 195 42 191 461 386 Residential mortgages 28 2 118 188 146 Home equity loans 30 2 70 135 100 Home equity lines of credit 23 1 179 243 202 Home equity loans serviced by others 20 1 19 51 39 Home equity lines of credit serviced by others 1 — 6 10 7 Automobile 1 — 21 30 22 Education 126 10 23 149 149 Credit cards 25 8 — 25 25 Other retail 3 1 3 7 6 Total retail loans 257 25 439 838 696 Total $452 $67 $630 $1,299 $1,082 December 31, 2018 (in millions) Impaired Loans With a Related Allowance Allowance on Impaired Loans Impaired Loans Without a Related Allowance Unpaid Contractual Balance Total Recorded Investment in Impaired Loans Commercial $186 $31 $167 $450 $353 Commercial real estate 32 7 6 38 38 Leases — — — — — Total commercial loans and leases 218 38 173 488 391 Residential mortgages 28 2 127 201 155 Home equity loans 34 3 76 148 110 Home equity lines of credit 21 1 181 244 202 Home equity loans serviced by others 22 1 19 54 41 Home equity lines of credit serviced by others 1 — 7 11 8 Automobile 1 — 22 31 23 Education 130 11 23 153 153 Credit cards 24 7 1 25 25 Other retail 4 1 2 8 6 Total retail loans 265 26 458 875 723 Total $483 $64 $631 $1,363 $1,114
Schedule of additional information on impaired loans	Additional information on impaired loans is presented below: Three Months Ended March 31, 2019 2018 (in millions) Interest Income Recognized Average Recorded Investment Interest Income Recognized Average Recorded Investment Commercial $3 $301 $2 $293 Commercial real estate — 26 — 27 Leases — — — — Total commercial loans and leases 3 327 2 320 Residential mortgages 1 143 1 149 Home equity loans 2 101 2 118 Home equity lines of credit 2 196 2 194 Home equity loans serviced by others 1 39 1 50 Home equity lines of credit serviced by others — 7 — 9 Automobile — 21 — 22 Education 2 150 2 171 Credit cards — 24 — 24 Other retail — 6 — 8 Total retail loans 8 687 8 745 Total $11 $1,014 $10 $1,065
Troubled debt restructurings on financing receivables	The table below summarizes TDRs by class and total unfunded commitments: (in millions) March 31, 2019 December 31, 2018 Commercial $296 $304 Retail 696 723 Unfunded commitments related to TDRs 25 30 The table below summarizes how loans were modified during the three months ended March 31, 2019 and 2018 . The reported balances represent the post-modification outstanding recorded investment and can include loans that became TDRs during the period and were paid off in full, charged off, or sold prior to period end. Pre-modification balances for modified loans approximate the post-modification balances shown. Three Months Ended March 31, 2019 Primary Modification Types Interest Rate Reduction 1 Maturity Extension 2 Other 3 (dollars in millions) Number of Contracts Recorded Investment Number of Contracts Recorded Investment Number of Contracts Recorded Investment Commercial — $— 5 $1 12 $40 Commercial real estate — — — — — — Total commercial loans — — 5 1 12 40 Residential mortgages 4 2 11 2 30 4 Home equity loans 7 — — — 27 1 Home equity lines of credit 29 4 35 6 105 8 Home equity loans serviced by others — — — — 4 — Home equity lines of credit serviced by others — — — — 2 — Automobile 25 — 5 — 289 4 Education — — — — 67 2 Credit cards 616 4 — — — — Other retail — — — — 1 — Total retail loans 681 10 51 8 525 19 Total 681 $10 56 $9 537 $59 Three Months Ended March 31, 2018 Primary Modification Types Interest Rate Reduction 1 Maturity Extension 2 Other 3 (dollars in millions) Number of Contracts Recorded Investment Number of Contracts Recorded Investment Number of Contracts Recorded Investment Commercial 1 $— 6 $1 18 $75 Commercial real estate — — 1 — — — Total commercial loans 1 — 7 1 18 75 Residential mortgages 7 1 7 1 53 6 Home equity loans 11 1 — — 32 2 Home equity lines of credit 15 1 42 5 93 7 Home equity loans serviced by others 1 — — — 7 — Home equity lines of credit serviced by others 2 — — — 3 — Automobile 36 1 17 1 269 4 Education — — — — 112 1 Credit cards 594 3 — — — — Other retail 1 — — — 4 — Total retail loans 667 7 66 7 573 20 Total 668 $7 73 $8 591 $95 (1) Includes modifications that consist of multiple concessions, one of which is an interest rate reduction. (2) Includes modifications that consist of multiple concessions, one of which is a maturity extension (unless one of the other concessions was an interest rate reduction). (3) Includes modifications other than interest rate reductions or maturity extensions, such as lowering scheduled payments for a specified period of time, principal forgiveness, and capitalizing arrearages. Also included are the following: deferrals, trial modifications, certain bankruptcies, loans in forbearance and prepayment plans. Modifications can include the deferral of accrued interest resulting in post modification balances being higher than pre-modification.
Schedule of loans that may increase credit exposure	The following tables present balances of loans with these characteristics: March 31, 2019 (in millions) Residential Mortgages Home Equity Loans and Lines of Credit Home Equity Products Serviced by Others Credit Cards Total High loan-to-value $342 $79 $134 $— $555 Interest-only/negative amortization 1,724 — — — 1,724 Low introductory rate — — — 219 219 Multiple characteristics and other 2 — — — 2 Total $2,068 $79 $134 $219 $2,500 December 31, 2018 (in millions) Residential Mortgages Home Equity Loans and Lines of Credit Home Equity Products Serviced by Others Credit Cards Education Total High loan-to-value $318 $87 $148 $— $— $553 Interest-only/negative amortization 1,794 — — — 1 1,795 Low introductory rate — — — 217 — 217 Multiple characteristics and other 1 — — — — 1 Total $2,113 $87 $148 $217 $1 $2,566

MORTGAGE BANKING (Tables)

MORTGAGE BANKING (Tables)	3 Months Ended
	Mar. 31, 2019
Mortgage Banking [Abstract]
Schedule of mortgage banking activities	The following table summarizes activity related to residential mortgage loans sold with servicing rights retained for the three months ended March 31, 2019 and 2018 . Three Months Ended March 31, (in millions) 2019 2018 Residential mortgage loans sold with servicing retained $2,919 $655 Gain on sales (1) 37 13 Contractually specified servicing, late and other ancillary fees (1) 48 15 (1) Reported in mortgage banking fees on the Consolidated Statements of Operations.
Schedule of valuation allowance for impairment of recognized servicing assets	The following table summarizes changes in MSRs recorded using the amortization method for the three months ended March 31, 2019 and 2018 . As of and for the Three Months Ended March 31, (in millions) 2019 2018 Mortgage servicing rights: Balance as of beginning of period $221 $201 Amount capitalized — 8 Amortization (9 ) (8 ) Carrying amount before valuation allowance 212 201 Valuation allowance for servicing assets: Balance as of beginning of period — 3 Valuation recoveries — (3 ) Balance at end of period — — Net carrying value of MSRs $212 $201
Servicing asset at amortized cost	The following table summarizes changes in MSRs recorded using the amortization method for the three months ended March 31, 2019 and 2018 . As of and for the Three Months Ended March 31, (in millions) 2019 2018 Mortgage servicing rights: Balance as of beginning of period $221 $201 Amount capitalized — 8 Amortization (9 ) (8 ) Carrying amount before valuation allowance 212 201 Valuation allowance for servicing assets: Balance as of beginning of period — 3 Valuation recoveries — (3 ) Balance at end of period — — Net carrying value of MSRs $212 $201
Servicing asset at fair value	The following table summarizes changes in MSRs recorded using the fair value method for the three months ended March 31, 2019 . There were no MSRs recorded using the fair value method for the three months ended March 31, 2018 . Three Months Ended March 31, 2019 (in millions) Fair value as of beginning of the period $600 Amounts capitalized 35 Changes in unpaid principal balance during the period (1) (26 ) Changes in fair value during the period (2) (46 ) Fair value at end of the period $563 (1) Represents changes in value due to i) passage of time including the impact from both regularly scheduled loan principal payments and partial paydowns, and ii) loans that paid off during the period. (2) Represents changes in value primarily due to market driven changes in interest rates and prepayment speeds.
Schedule of fair value assumptions used to estimate the value of Mortgage Servicing Rights	For MSRs under the amortization method, the key economic assumptions used to estimate the fair value are presented below: March 31, 2019 December 31, 2018 Actual Decline in fair value due to Actual Decline in fair value due to (dollars in millions) Fair value $224 50 bps adverse change 100 bps adverse change $243 50 bps adverse change 100 bps adverse change Weighted average life (in years) 6.1 6.5 Weighted average constant prepayment rate 9.6% $27 $58 8.5% $24 $56 Weighted average discount rate 9.3% 4 8 9.3% 5 9 For MSRs under the fair value method, the key economic assumptions used to estimate the fair value are presented below: March 31, 2019 December 31, 2018 Actual Decline in fair value due to Actual Decline in fair value due to (dollars in millions) Fair value $563 50 bps adverse change 100 bps adverse change $600 50 bps adverse change 100 bps adverse change Weighted average life (in years) 6.7 8.0 Weighted average constant prepayment rate 10.7% $81 $177 8.2% $68 $148 Weighted average option adjusted spread 568 bps 11 22 609 bps 13 26

LEASES (Tables)

LEASES (Tables)	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Components of operating lease cost	Supplemental information related to the Company’s operating lease arrangements is presented below: (in millions) Three Months Ended March 31, 2019 Cash paid for amounts included in measurement of liabilities: Operating cash flows from operating leases $39 Right-of-use assets in exchange for new operating lease liabilities 47 The components of operating lease cost are presented below: (in millions) Three Months Ended March 31, 2019 Operating lease cost $40 Short-term lease cost 3 Variable lease cost 2 Sublease income (1 ) Total $44
Supplemental consolidated balance sheet information	Supplemental Consolidated Balance Sheet information related to the Company’s operating lease arrangements is presented below: (in millions) March 31, 2019 Affected Line Item in Consolidated Balance Sheets Operating lease right-of-use assets $746 Other assets Operating lease liabilities 762 Other liabilities
Lease liability maturity schedule	At March 31, 2019 , lease liabilities maturing under non-cancelable operating leases are presented below for the years ended December 31: (in millions Operating Leases 2019 $108 2020 157 2021 140 2022 115 2023 90 Thereafter 249 Total lease payments 859 Less interest 97 Present value of lease liabilities $762

VARIABLE INTEREST ENTITIES (Tab

VARIABLE INTEREST ENTITIES (Tables)	3 Months Ended
	Mar. 31, 2019
Equity Method Investments and Joint Ventures [Abstract]
Schedule of variable interest entities	A summary of these investments is presented below: (in millions) March 31, 2019 December 31, 2018 LIHTC investment included in other assets $1,263 $1,236 LIHTC unfunded commitments included in other liabilities 676 673 Renewable energy investments included in other assets 315 319 Lending to special purpose entities included in loans and leases 728 613
Schedule of Affordable Housing Tax Credit investments	The following table presents other information related to the Company’s affordable housing tax credit investments: Three Months Ended March 31, (in millions) 2019 2018 Tax credits included in income tax expense $35 $25 Amortization expense included in income tax expense 37 27 Other tax benefits included in income tax expense 8 6

BORROWED FUNDS (Tables)

BORROWED FUNDS (Tables)	3 Months Ended
	Mar. 31, 2019
Debt Disclosure [Abstract]
Schedule of short-term borrowed funds	A summary of the Company’s short-term borrowed funds is presented below: (in millions) March 31, 2019 December 31, 2018 Federal funds purchased $375 $820 Securities sold under agreements to repurchase 293 336 Other short-term borrowed funds 11 161 Total short-term borrowed funds $679 $1,317 Key data related to short-term borrowed funds is presented in the following table: As of and for the Three Months Ended March 31, As of and for the Year Ended December 31, (dollars in millions) 2019 2018 2018 Weighted-average interest rate at period-end: (1) Federal funds purchased and securities sold under agreements to repurchase 1.39 % — % 1.72 % Other short-term borrowed funds 3.03 3.40 2.73 Maximum amount outstanding at any month-end during the period: Federal funds purchased and securities sold under agreements to repurchase (2) $1,134 $625 $1,282 Other short-term borrowed funds 511 1,110 1,110 Average amount outstanding during the period: Federal funds purchased and securities sold under agreements to repurchase (2) $640 $645 $654 Other short-term borrowed funds 58 588 467 Weighted-average interest rate during the period: (1) Federal funds purchased and securities sold under agreements to repurchase 1.24 % 0.66 % 0.92 % Other short-term borrowed funds 2.75 1.67 2.10 (1) Rates exclude certain hedging costs. (2) Balances are net of certain short-term receivables associated with reverse repurchase agreements, as applicable.
Schedule of long-term borrowed funds	A summary of the Company’s long-term borrowed funds is presented below: (in millions) March 31, 2019 December 31, 2018 Parent Company: 2.375% fixed-rate senior unsecured debt, due July 2021 $349 $349 4.150% fixed-rate subordinated debt, due September 2022 348 348 3.750% fixed-rate subordinated debt, due July 2024 250 250 4.023% fixed-rate subordinated debt, due October 2024 42 42 4.350% fixed-rate subordinated debt, due August 2025 249 249 4.300% fixed-rate subordinated debt, due December 2025 750 749 Banking and Other Subsidiaries: 2.500% senior unsecured notes, due March 2019 (1) — 748 2.450% senior unsecured notes, due December 2019 (1) 745 744 2.250% senior unsecured notes, due March 2020 (1) 694 691 3.155% floating-rate senior unsecured notes, due March 2020 (1) (2) 300 300 3.216% floating-rate senior unsecured notes, due May 2020 (1) (2) 250 250 2.200% senior unsecured notes, due May 2020 (1) 499 499 2.250% senior unsecured notes, due October 2020 (1) 742 738 2.550% senior unsecured notes, due May 2021 (1) 973 964 3.250% senior unsecured notes, due February 2022 (1) 702 — 3.413% floating-rate senior unsecured notes, due February 2022 (1) (2) 299 — 3.456% floating-rate senior unsecured notes, due May 2022 (1) (2) 249 249 2.650% senior unsecured notes, due May 2022 (1) 492 487 3.700% senior unsecured notes, due March 2023 (1) 508 502 3.551% floating-rate senior unsecured notes, due March 2023 (1) (2) 249 249 3.750% senior unsecured notes, due February 2026 (1) 506 — Federal Home Loan Bank advances, 2.787% weighted average rate, due through 2038 2,508 7,508 Other 21 9 Total long-term borrowed funds $11,725 $15,925 (1) Issued under CBNA’s Global Bank Note Program. (2) Rate disclosed reflects the floating rate as of March 31, 2019 .
Schedule of maturities of long-term borrowed funds	A summary of maturities for the Company’s long-term borrowed funds at March 31, 2019 is presented below: (in millions) Parent Company Banking and Other Subsidiaries Consolidated Year 2019 $— $748 $748 2020 — 4,989 4,989 2021 349 978 1,327 2022 348 1,749 2,097 2023 — 759 759 2024 and thereafter 1,291 514 1,805 Total $1,988 $9,737 $11,725

DERIVATIVES (Tables)

DERIVATIVES (Tables)	3 Months Ended
	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of derivative instruments in consolidated balance sheets	The following table presents derivative instruments included on the Consolidated Balance Sheets in derivative assets and derivative liabilities: March 31, 2019 December 31, 2018 (in millions) Notional Amount (1) Derivative Assets Derivative Liabilities Notional Amount (1) Derivative Assets Derivative Liabilities Derivatives designated as hedging instruments: Interest rate contracts $14,500 $— $15 $12,050 $5 $— Derivatives not designated as hedging instruments: Interest rate contracts 126,525 443 145 117,076 301 277 Foreign exchange contracts 11,858 135 113 9,866 129 113 Other contracts 5,221 19 21 3,555 14 25 Total derivatives not designated as hedging instruments 597 279 444 415 Gross derivative fair values 597 294 449 415 Less: Gross amounts offset in the Consolidated Balance Sheets (2) (78 ) (78 ) (87 ) (87 ) Less: Cash collateral applied (2) (54 ) (43 ) (45 ) (36 ) Total net derivative fair values presented in the Consolidated Balance Sheets $465 $173 $317 $292 (1) The notional or contractual amount of interest rate derivatives and foreign exchange contracts is the amount upon which interest and other payments under the contract are based. For interest rate contracts, the notional amount is typically not exchanged. Therefore, notional amounts should not be taken as the measure of credit or market risk, as they do not measure the true economic risk of these contracts. (2) Amounts represent the impact of enforceable master netting agreements that allow the Company to net settle positive and negative positions.
Schedule of fair value hedges	The following table reflects the change in fair value of interest rate contracts, designated as fair value hedges, as well as the change in fair value of the related hedged items attributable to the risk being hedged, included in the Consolidated Statements of Operations: Three Months Ended March 31, (in millions) 2019 2018 Affected Line Item in the Consolidated Statements of Operations Change in fair value of interest rate swaps hedging borrowed funds $39 ($39 ) Interest expense - borrowed funds Change in fair value of hedged long-term debt attributable to the risk being hedged (39 ) 37 Interest expense - borrowed funds The following table reflects amounts recorded on the Consolidated Balance Sheets related to cumulative basis adjustments for fair value hedges: March 31, 2019 (in millions) Long-term borrowed funds Carrying amount of the hedged liabilities $5,362 Cumulative amount of fair value hedging adjustments included in the carrying amount of the hedged items (1) (23 ) (1) The balance reported includes ($4) million of cumulative hedging adjustments recorded on discontinued fair value hedging relationships.
Schedule of effect of cash flow hedges on net income and stockholders' equity	The following table presents the pretax net gains (losses) recorded in the Consolidated Statements of Operations and in the Consolidated Statements of Comprehensive Income relating to derivative instruments designated as cash flow hedges: Three Months Ended March 31, (in millions) 2019 2018 (1) Amount of pretax net gains (losses) recognized in OCI $51 ($70 ) Amount of pretax net losses reclassified from OCI into interest income (20 ) (6 ) Amount of pretax net gains reclassified from OCI into interest expense — 4 (1) For the three months ended March 31, 2018 , the amount of pretax net losses recognized in OCI represented the effective portion of the cumulative gains or losses on cash flow hedges and ineffectiveness was reported within noninterest income.
Schedule of effect of derivative Instruments on net income	The following table presents the effect of economic hedges on noninterest income: Amounts Recognized in Noninterest Income for the Three Months Ended March 31, Affected Line Item in the Consolidated Statements of Operations (in millions) 2019 2018 Economic hedge type: Customer interest rate contracts $229 ($204 ) Foreign exchange and interest rate products Customer foreign exchange contracts (34 ) 11 Foreign exchange and interest rate products Derivatives transactions to hedge interest rate risk (217 ) 216 Foreign exchange and interest rate products Derivatives transactions to hedge foreign exchange risk 40 (17 ) Foreign exchange and interest rate products Residential loan commitments 5 (1 ) Mortgage banking fees Forward sale contracts 4 — Mortgage banking fees Interest rate derivative contracts used to hedge residential MSRs 45 — Mortgage banking fees Total $72 $5

RECLASSIFICATIONS OUT OF ACCU_2

RECLASSIFICATIONS OUT OF ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables)	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Schedule of other comprehensive income	The following tables present the changes in the balances, net of income taxes, of each component of AOCI: As of and for the Three Months Ended March 31, (in millions) Net Unrealized (Losses) Gains on Derivatives Net Unrealized (Losses) Gains on Debt Securities Employee Benefit Plans Total AOCI Balance at January 1, 2018 ($143 ) ($236 ) ($441 ) ($820 ) Other comprehensive loss before reclassifications (52 ) (272 ) — (324 ) Other-than-temporary impairment not recognized in earnings on debt securities — (1 ) — (1 ) Amounts reclassified to the Consolidated Statements of Operations 2 (5 ) 3 — Net other comprehensive (loss) income (50 ) (278 ) 3 (325 ) Balance at March 31, 2018 ($193 ) ($514 ) ($438 ) ($1,145 ) Balance at January 1, 2019 ($143 ) ($490 ) ($463 ) ($1,096 ) Other comprehensive income before reclassifications 39 246 — 285 Other-than-temporary impairment not recognized in earnings on debt securities — — — — Amounts reclassified to the Consolidated Statements of Operations 15 (5 ) 3 13 Cumulative effect of change in accounting standards — 5 — 5 Net other comprehensive income 54 246 3 303 Balance at March 31, 2019 ($89 ) ($244 ) ($460 ) ($793 )
Schedule of reclassification out of accumulated other comprehensive income	The following table presents the amounts reclassified out of each component of AOCI and into the Consolidated Statements of Operations: Three Months Ended March 31, (in millions) 2019 2018 Details about AOCI Components Affected Line Item in the Consolidated Statements of Operations Reclassification adjustment for net derivative losses included in net income: ($20 ) ($6 ) Interest income — 4 Interest expense (20 ) (2 ) Income before income tax expense (5 ) — Income tax expense ($15 ) ($2 ) Net income Reclassification of net debt securities gains to net income: $8 $8 Securities gains, net (1 ) (1 ) Net debt securities impairment losses recognized in earnings 7 7 Income before income tax expense 2 2 Income tax expense $5 $5 Net income Reclassification of changes related to the employee benefit plan: ($5 ) ($4 ) Other operating expense (5 ) (4 ) Income before income tax expense (2 ) (1 ) Income tax expense ($3 ) ($3 ) Net income Total reclassification (losses) gains ($13 ) $— Net income The following table presents the effects on net income of the amounts reclassified out of AOCI: Three Months Ended March 31, (in millions) 2019 2018 Net interest income (includes ($20) and ($2) of AOCI reclassifications, respectively) $1,160 $1,091 Provision for credit losses 85 78 Noninterest income (includes $7 and $7 of AOCI reclassifications, respectively) 428 371 Noninterest expense (includes $5 and $4 of AOCI reclassifications, respectively) 937 883 Income before income tax expense 566 501 Income tax expense (includes ($5) and $1 income tax net expense from reclassification items, respectively) 127 113 Net income $439 $388

STOCKHOLDERS' EQUITY (Tables)

STOCKHOLDERS' EQUITY (Tables)	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Schedule of preferred stock	The following table provides the number of authorized preferred shares, the number of issued and outstanding, the liquidation value per share and the carrying amount: March 31, 2019 December 31, 2018 (in millions, except per share and share data) Liquidation value per share Preferred Shares Carrying Amount Preferred Shares Carrying Amount Authorized ($25 par value) 100,000,000 100,000,000 Issued and outstanding: Series A $1,000 250,000 $247 250,000 $247 Series B 1,000 300,000 296 300,000 296 Series C 1,000 300,000 297 300,000 297 Series D 1,000 (1) 300,000 (2) 292 — — Total 1,150,000 $1,132 850,000 $840 (1) Equivalent to $25 per depositary share. (2) Represented by 12,000,000 depositary shares each representing a 1/40th interest in the Series D Preferred Stock. The following table provides information related to the Company’s preferred stock outstanding as of March 31, 2019 : (in millions, except share data) Preferred Stock (1) Issue Date Number of Shares Outstanding Dividend Dates (2) Annual Per Share Dividend Rate Optional Redemption Date (3) Series A April 6, 2015 250,000 Semi-annually beginning October 6, 2015 until April 6, 2020 5.500% until April 6, 2020 April 6, 2020 Quarterly beginning July 6, 2020 3 Mo. LIBOR plus 3.960% beginning April 6, 2020 Series B May 24, 2018 300,000 Semi-annually beginning January 6, 2019 until July 6, 2023 6.000% until July 6, 2023 July 6, 2023 Quarterly beginning October 6, 2023 3 Mo. LIBOR plus 3.003% beginning July 6, 2023 Series C October 25, 2018 300,000 Quarterly beginning January 6, 2019 until April 6, 2024 6.375% until April 6, 2024 April 6, 2024 Quarterly beginning July 6, 2024 3 Mo. LIBOR plus 3.157% beginning April 6, 2024 Series D January 29, 2019 300,000 (4) Quarterly beginning April 6, 2019 until April 6, 2024 6.350% until April 6, 2024 April 6, 2024 Quarterly beginning July 6, 2024 3 Mo. LIBOR plus 3.642% beginning April 6, 2024 (1) All outstanding series are non-cumulative fixed-to-floating rate perpetual preferred stock. Except in limited circumstances, the preferred stock does not have voting rights. (2) Dividends are payable when, and if, declared by the Company’s Board of Directors or an authorized committee thereof. (3) Redeemable at the Company’s option, in whole or in part, on any dividend payment date on or after the date stated, or in whole but not in part, at any time within 90 days following a regulatory capital treatment event a as defined in the applicable certificate of designations, in each case at a redemption price equal to $1,000 per share (equivalent to $25 per depositary share for the Series D Preferred Stock), plus any declared and unpaid dividends, without accumulation of any undeclared dividends. Under current rules, any redemption is subject to approval by the FRB. (4) Represented by 12,000,000 depositary shares each representing a 1/40th interest in the Series D Preferred Stock.
Schedule of dividends	The following table provides information related to dividends per share and in the aggregate, declared and paid, for each type of stock issued and outstanding: Three Months Ended March 31, 2019 Three Months Ended March 31, 2018 (in millions, except per share data) Dividends Declared per Share Dividends Declared Dividends Paid Dividends Declared per Share Dividends Declared Dividends Paid Common stock $0.32 $149 $149 $0.22 $108 $108 Preferred stock Series A $27.50 $7 $— $27.50 $7 $— Series B — — 11 — — — Series C 15.94 5 4 — — — Series D 11.82 3 — — — — Total preferred stock $15 $15 $7 $—

COMMITMENTS AND CONTINGENCIES (

COMMITMENTS AND CONTINGENCIES (Tables)	3 Months Ended
	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Schedule of outstanding off balance sheet arrangements	A summary of outstanding off-balance sheet arrangements is presented below. For more information on these arrangements, see Note 18 “Commitments and Contingencies” to the Company’s audited Consolidated Financial Statements in the Annual Report on Form 10-K for the year ended December 31, 2018. (in millions) March 31, 2019 December 31, 2018 Commitments to extend credit $68,564 $69,553 Letters of credit 2,089 2,125 Marketing rights 37 37 Risk participation agreements 27 19 Loans sold with recourse 22 5 Total $70,739 $71,739

FAIR VALUE MEASUREMENTS (Tables

FAIR VALUE MEASUREMENTS (Tables)	3 Months Ended
	Mar. 31, 2019
Fair Value Disclosures [Abstract]
Summary of difference between aggregated fair value and unpaid principal balance of loans held for sale	The following table presents the difference between the aggregate fair value and the aggregate unpaid principal balance of LHFS measured at fair value: March 31, 2019 December 31, 2018 (in millions) Aggregate Fair Value Aggregate Unpaid Principal Aggregate Fair Value Less Aggregate Unpaid Principal Aggregate Fair Value Aggregate Unpaid Principal Aggregate Fair Value Less Aggregate Unpaid Principal Residential mortgage loans held for sale, at fair value $1,009 $1,009 $— $967 $967 $— Commercial and commercial real estate loans held for sale, at fair value 177 177 — 252 252 —
Assets and liabilities measured on recurring basis	The following table presents assets and liabilities measured at fair value, including gross derivative assets and liabilities on a recurring basis at March 31, 2019 : (in millions) Total Level 1 Level 2 Level 3 Debt securities available for sale: Mortgage-backed securities $21,427 $— $21,427 $— State and political subdivisions 5 — 5 — U.S. Treasury and other 72 72 — — Total debt securities available for sale 21,504 72 21,432 — Loans held for sale, at fair value: Residential loans held for sale 1,009 — 1,009 — Commercial loans held for sale 177 — 177 — Total loans held for sale, at fair value 1,186 — 1,186 — Mortgage servicing rights 563 — — 563 Derivative assets: Interest rate contracts 443 — 443 — Foreign exchange contracts 135 — 135 — Other contracts 19 — 1 18 Total derivative assets 597 — 579 18 Equity securities, at fair value: Money market mutual fund investments 198 198 — — Total equity securities, at fair value 198 198 — — Total assets $24,048 $270 $23,197 $581 Derivative liabilities: Interest rate contracts $160 $— $160 $— Foreign exchange contracts 113 — 113 — Other contracts 21 — 21 — Total derivative liabilities 294 — 294 — Total liabilities $294 $— $294 $— The following table presents assets and liabilities measured at fair value, including gross derivative assets and liabilities on a recurring basis at December 31, 2018 : (in millions) Total Level 1 Level 2 Level 3 Debt securities available for sale: Mortgage-backed securities $19,866 $— $19,866 $— State and political subdivisions 5 — 5 — U.S. Treasury and other 24 24 — — Total debt securities available for sale 19,895 24 19,871 — Loans held for sale, at fair value: Residential loans held for sale 967 — 967 — Commercial loans held for sale 252 — 252 — Total loans held for sale, at fair value 1,219 — 1,219 — Mortgage servicing rights 600 — — 600 Derivative assets: Interest rate contracts 306 — 306 — Foreign exchange contracts 129 — 129 — Other contracts 14 — 14 — Total derivative assets 449 — 449 — Equity securities, at fair value: Money market mutual fund investments 181 181 — — Total equity securities, at fair value 181 181 — — Total assets $22,344 $205 $21,539 $600 Derivative liabilities: Interest rate contracts $277 $— $277 $— Foreign exchange contracts 113 — 113 — Other contracts 25 — 25 — Total derivative liabilities 415 — 415 — Total liabilities $415 $— $415 $—
Asses measured at fair value on recurring basis and classified as Level 3	The following tables present a rollforward of the balance sheet amounts for assets measured at fair value on a recurring basis and classified as Level 3 for the three months ended March 31, 2019. There were no assets measured at fair value on a recurring basis and classified as Level 3 for the three months ended March 31, 2018. For the Three Months Ended March 31, (in millions) Mortgage Servicing Rights Other Derivative Contracts Balance at January 1, 2019 $600 $— Amount capitalized 35 — Change in unpaid principal balance during the period (1) (26 ) — Change in fair value during the period (2) (46 ) — Transfers from Level 2 to Level 3 (3) — 18 Balance at March 31, 2019 $563 $18 (1) Represents changes in value of the MSRs due to i) passage of time including the impact from both regularly scheduled loan principal payments and partial paydowns, and ii) loans that paid off during the period. (2) Represents changes in value primarily due to market driven changes in interest rates and prepayment speeds. (3) Reflects changes in the significance of unobservable inputs on derivative contracts associated with mortgage origination activities.
Gains (losses) on assets and liabilities measured on a nonrecurring basis included in earnings	The following table presents gains (losses) on assets and liabilities measured at fair value on a nonrecurring basis and recorded in earnings: Three Months Ended March 31, (in millions) 2019 2018 Impaired collateral-dependent loans ($4 ) ($2 ) MSRs — 3 Foreclosed assets — (1 ) Leased assets (3 ) —
Fair value of assets and liabilities measured on a nonrecurring basis	The following table presents assets and liabilities measured at fair value on a nonrecurring basis: March 31, 2019 December 31, 2018 (in millions) Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Impaired collateral-dependent loans $371 $— $371 $— $338 $— $338 $— MSRs 224 — — 224 243 — — 243 Foreclosed assets 29 — 29 — 29 — 29 — Leased assets 91 — 91 — 92 — 92 —
Assets and liabilities measured at fair value	The following table presents the estimated fair value for financial instruments not recorded at fair value in the unaudited interim Consolidated Financial Statements. The carrying amounts are recorded in the Consolidated Balance Sheets under the indicated captions: March 31, 2019 Total Level 1 Level 2 Level 3 (in millions) Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Financial assets: Securities held to maturity $3,345 $3,267 $— $— $3,345 $3,267 $— $— Equity securities, at cost 604 604 — — 604 604 — — Other loans held for sale 66 66 — — — — 66 66 Loans and leases 117,615 117,862 — — 371 371 117,244 117,491 Financial liabilities: Deposits 123,916 123,875 — — 123,916 123,875 — — Federal funds purchased and securities sold under agreements to repurchase 668 668 — — 668 668 — — Other short-term borrowed funds 11 11 — — 11 11 — — Long-term borrowed funds 11,725 11,767 — — 11,725 11,767 — — December 31, 2018 Total Level 1 Level 2 Level 3 (in millions) Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Financial assets: Securities held to maturity $4,165 $4,041 $— $— $4,165 $4,041 $— $— Equity securities, at cost 834 834 — — 834 834 — — Other loans held for sale 101 101 — — — — 101 101 Loans and leases 116,660 116,627 — — 338 338 116,322 116,289 Financial liabilities: Deposits 119,575 119,503 — — 119,575 119,503 — — Federal funds purchased and securities sold under agreements to repurchase 1,156 1,156 — — 1,156 1,156 — — Other short-term borrowed funds 161 161 — — 161 161 — — Long-term borrowed funds 15,925 15,877 — — 15,925 15,877 — —

NONINTEREST INCOME (Tables)

NONINTEREST INCOME (Tables)	3 Months Ended
	Mar. 31, 2019
Other Income and Expenses [Abstract]
Components of revenue from contracts with customers	The following table presents the components of revenue from contracts with customers disaggregated by revenue stream and business operating segment: Three Months Ended March 31, 2019 Three Months Ended March 31, 2018 (in millions) Consumer Banking Commercial Banking Consolidated (1) Consumer Banking Commercial Banking Consolidated (1) Service charges and fees $97 $26 $123 $98 $26 $124 Card fees 50 9 59 52 9 61 Capital markets fees — 49 49 — 37 37 Trust and investment services fees 47 — 47 40 — 40 Other banking fees — 2 2 — 3 3 Total revenue from contracts with customers $194 $86 $280 $190 $75 $265 (1) There is no revenue from contracts with customers included in Other non-segment operations.
Details of other income	Three Months Ended March 31, (in millions) 2019 2018 Bank-owned life insurance $14 $14

OTHER OPERATING EXPENSE (Tables

OTHER OPERATING EXPENSE (Tables)	3 Months Ended
	Mar. 31, 2019
Other Income and Expenses [Abstract]
Schedule of other operating expense	The following table presents the details of other operating expense: Three Months Ended March 31, (in millions) 2019 2018 Deposit insurance $16 $31 Promotional expense 27 25 Settlements and operating losses 11 12 Other 56 52 Other operating expense $110 $120

EARNINGS PER SHARE (Tables)

EARNINGS PER SHARE (Tables)	3 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Schedule of earnings per share	Three Months Ended March 31, (in millions, except share and per share data) 2019 2018 Numerator (basic and diluted): Net income $439 $388 Less: Preferred stock dividends 15 7 Net income available to common stockholders $424 $381 Denominator: Weighted-average common shares outstanding - basic 460,713,172 487,500,618 Dilutive common shares: share-based awards 1,807,508 1,766,208 Weighted-average common shares outstanding - diluted 462,520,680 489,266,826 Earnings per common share: Basic $0.92 $0.78 Diluted (1) 0.92 0.78 (1) Potential dilutive common shares are excluded from the computation of diluted EPS in the periods where the effect would be antidilutive. Excluded from the computation of diluted EPS were antidilutive shares totaling 1 million for the three months ended March 31, 2019 . There were no antidilutive shares for the three months ended March 31, 2018 .

BUSINESS OPERATING SEGMENTS (Ta

BUSINESS OPERATING SEGMENTS (Tables)	3 Months Ended
	Mar. 31, 2019
Segment Reporting [Abstract]
Schedule of segment reporting information	As of and for the Three Months Ended March 31, 2019 (in millions) Consumer Banking Commercial Banking Other Consolidated Net interest income $788 $372 $— $1,160 Noninterest income 247 150 31 428 Total revenue 1,035 522 31 1,588 Noninterest expense 700 209 28 937 Profit before provision for credit losses 335 313 3 651 Provision for credit losses 67 21 (3 ) 85 Income before income tax expense (benefit) 268 292 6 566 Income tax expense (benefit) 66 65 (4 ) 127 Net income $202 $227 $10 $439 Total average assets $65,007 $55,630 $39,778 $160,415 As of and for the Three Months Ended March 31, 2018 (in millions) Consumer Banking Commercial Banking Other Consolidated Net interest income $733 $357 $1 $1,091 Noninterest income 222 125 24 371 Total revenue 955 482 25 1,462 Noninterest expense 656 208 19 883 Profit before provision for credit losses 299 274 6 579 Provision for credit losses 72 (4 ) 10 78 Income (loss) before income tax expense (benefit) 227 278 (4 ) 501 Income tax expense (benefit) 57 63 (7 ) 113 Net income $170 $215 $3 $388 Total average assets $61,348 $50,393 $39,782 $151,523

BASIS OF PRESENTATION Operating

BASIS OF PRESENTATION Operating Leases (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Jan. 01, 2019
Operating Leased Assets [Line Items]
Goodwill acquired	$ 118
Cumulative effect of change in accounting standards		$ 17
Operating lease right-of-use assets	746
Operating lease liabilities	762
Accounting Standards Update 2016-02
Operating Leased Assets [Line Items]
Operating lease right-of-use assets	734
Operating lease liabilities	$ 749
Retained Earnings
Operating Leased Assets [Line Items]
Cumulative effect of change in accounting standards		12
Retained Earnings | Accounting Standards Update 2016-02
Operating Leased Assets [Line Items]
Cumulative effect of change in accounting standards		$ 12

SECURITIES - Narrative (Details

SECURITIES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Taxable interest income from securities	$ 166	$ 168
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Securitizations of mortgage loans	31	26
Available-for-sale Securities
Debt Securities, Available-for-sale [Line Items]
Cumulative credit losses recognized in earnings	78	80	$ 81	$ 80
OTTI in earnings	1	1
Held-to-maturity Securities
Debt Securities, Available-for-sale [Line Items]
Cumulative credit losses recognized in earnings	$ 0	$ 0

SECURITIES - Schedule of Invest

SECURITIES - Schedule of Investments (Details) - USD ($) $ in Millions		Mar. 31, 2019	Dec. 31, 2018
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities Available-for-sale, Fair Value	[1]	$ 21,504	$ 19,895
Debt Securities Held-to-maturity, Amortized Cost		3,345	4,165
Debt Securities Held-to-maturity, Gross Unrealized Gain		1	8
Debt Securities Held-to-maturity, Gross Unrealized Losses		(79)	(132)
Debt Securities held-to-maturity, Fair Value		3,267	4,041
Equity Securities, Amortized Cost		198	181
Equity Securities, Fair Value		198	181
Other equity securities, Amortized Cost		8	7
Other equity securities, Fair Value		8	7
Total equity securities, at cost, Amortized Cost		604	834
Total equity securities, at cost, Fair Value		604	834
U.S. Treasury and other
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities Available-for-sale, Amortized Cost		72	24
Debt Securities Available-for-sale, Gross Unrealized Gains		0	0
Debt Securities Available-for-sale, Gross Unrealized Losses		0	0
Debt Securities Available-for-sale, Fair Value		72	24
State and political subdivisions
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities Available-for-sale, Amortized Cost		5	5
Debt Securities Available-for-sale, Gross Unrealized Gains		0	0
Debt Securities Available-for-sale, Gross Unrealized Losses		0	0
Debt Securities Available-for-sale, Fair Value		5	5
Federal agencies and U.S. government sponsored entities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities Available-for-sale, Amortized Cost		20,768	20,211
Debt Securities Available-for-sale, Gross Unrealized Gains		66	28
Debt Securities Available-for-sale, Gross Unrealized Losses		(337)	(605)
Debt Securities Available-for-sale, Fair Value		20,497	19,634
Debt Securities Held-to-maturity, Amortized Cost		3,345	3,425
Debt Securities Held-to-maturity, Gross Unrealized Gain		1	0
Debt Securities Held-to-maturity, Gross Unrealized Losses		(79)	(132)
Debt Securities held-to-maturity, Fair Value		3,267	3,293
Other/non-agency
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities Available-for-sale, Amortized Cost		916	236
Debt Securities Available-for-sale, Gross Unrealized Gains		18	3
Debt Securities Available-for-sale, Gross Unrealized Losses		(4)	(7)
Debt Securities Available-for-sale, Fair Value		930	232
Debt Securities Held-to-maturity, Amortized Cost		0	740
Debt Securities Held-to-maturity, Gross Unrealized Gain		0	8
Debt Securities Held-to-maturity, Gross Unrealized Losses		0	0
Debt Securities held-to-maturity, Fair Value		0	748
Total mortgage-backed securities, at fair value
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities Available-for-sale, Amortized Cost		21,684	20,447
Debt Securities Available-for-sale, Gross Unrealized Gains		84	31
Debt Securities Available-for-sale, Gross Unrealized Losses		(341)	(612)
Debt Securities Available-for-sale, Fair Value		21,427	19,866
Debt Securities Held-to-maturity, Amortized Cost		3,345	4,165
Debt Securities Held-to-maturity, Gross Unrealized Gain		1	8
Debt Securities Held-to-maturity, Gross Unrealized Losses		(79)	(132)
Debt Securities held-to-maturity, Fair Value		3,267	4,041
Total debt securities available for sale, at fair value
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities Available-for-sale, Amortized Cost		21,761	20,476
Debt Securities Available-for-sale, Gross Unrealized Gains		84	31
Debt Securities Available-for-sale, Gross Unrealized Losses		(341)	(612)
Debt Securities Available-for-sale, Fair Value		21,504	19,895
Money market mutual fund investments
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Equity Securities, Amortized Cost		198	181
Equity Securities, Fair Value		198	181
Federal Reserve Bank stock
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Federal Reserve Bank stock, Amortized Cost		463	463
Federal Reserve Bank stock, Fair Value		463	463
Federal Home Loan Bank stock
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Federal Home Loan Bank stock, Amortized Cost		133	364
Federal Home Loan Bank stock, Fair Value		$ 133	$ 364
[1]	Includes only collateral pledged by the Company where counterparties have the right to sell or pledge the collateral.

SECURITIES - Schedule of Availa

SECURITIES - Schedule of Available for Sale Securities Debt Maturities (Details) $ in Millions	Mar. 31, 2019USD ($)
Amortized cost:
Amortized Cost, Debt securities available for sale, Maturity of 1 Year or Less	$ 74
Amortized Cost, Debt securities available for sale, Maturity of 1-5 Years	259
Amortized Cost, Debt securities available for sale, Maturity of 5-10 Years	1,641
Amortized Cost, Debt securities available for sale, Maturity After 10 Years	19,787
Amortized Cost, Debt securities available for sale, Total	21,761
Amortized Cost, Debt securities held to maturity, Maturity of 1 Year or Less	0
Amortized Cost, Debt securities held to maturity, Maturity of 1-5 Years	0
Amortized Cost, Debt securities held to maturity, Maturity of 5-10 Years	0
Amortized Cost, Debt securities held to maturity, Maturity After 10 Years	3,345
Amortized Cost, Debt securities held to maturity, Total	3,345
Total amortized cost of debt securities, Maturity of 1 Year or Less	74
Total amortized cost of debt securities, Maturity of 1-5 Years	259
Total amortized cost of debt securities, Maturity of 5-10 Years	1,641
Total amortized cost of debt securities, Maturity After 10 Years	23,132
Total amortized cost of debt securities, Total	25,106
Fair value:
Fair Value, Debt securities available for sale, Maturity of 1 Year or Less	74
Fair Value, Debt securities available for sale, Maturity of 1-5 Years	255
Fair Value, Debt securities available for sale, Maturity of 5-10 Years	1,634
Fair Value, Debt securities available for sale, Maturity After 10 Years	19,541
Fair Value, Debt securities available for sale, Total	21,504
Fair Value, Debt securities held to maturity, Maturity of 1 Year or Less	0
Fair Value, Debt securities held to maturity, Maturity of 1-5 Years	0
Fair Value, Debt securities held to maturity, Maturity of 5-10 Years	0
Fair Value, Debt securities held to maturity, Maturity After 10 Years	3,267
Fair Value, Debt securities held to maturity, Total	3,267
Total fair value of debt securities, Maturity of 1 Year or Less	74
Total fair value of debt securities, Maturity of 1-5 Years	255
Total fair value of debt securities, Maturity of 5-10 Years	1,634
Total fair value of debt securities, Maturity After 10 Years	22,808
Total fair value of debt securities, Total	24,771
U.S. Treasury and other
Amortized cost:
Amortized Cost, Debt securities available for sale, Maturity of 1 Year or Less	72
Amortized Cost, Debt securities available for sale, Maturity of 1-5 Years	0
Amortized Cost, Debt securities available for sale, Maturity of 5-10 Years	0
Amortized Cost, Debt securities available for sale, Maturity After 10 Years	0
Amortized Cost, Debt securities available for sale, Total	72
Fair value:
Fair Value, Debt securities available for sale, Maturity of 1 Year or Less	72
Fair Value, Debt securities available for sale, Maturity of 1-5 Years	0
Fair Value, Debt securities available for sale, Maturity of 5-10 Years	0
Fair Value, Debt securities available for sale, Maturity After 10 Years	0
Fair Value, Debt securities available for sale, Total	72
State and political subdivisions
Amortized cost:
Amortized Cost, Debt securities available for sale, Maturity of 1 Year or Less	0
Amortized Cost, Debt securities available for sale, Maturity of 1-5 Years	0
Amortized Cost, Debt securities available for sale, Maturity of 5-10 Years	0
Amortized Cost, Debt securities available for sale, Maturity After 10 Years	5
Amortized Cost, Debt securities available for sale, Total	5
Fair value:
Fair Value, Debt securities available for sale, Maturity of 1 Year or Less	0
Fair Value, Debt securities available for sale, Maturity of 1-5 Years	0
Fair Value, Debt securities available for sale, Maturity of 5-10 Years	0
Fair Value, Debt securities available for sale, Maturity After 10 Years	5
Fair Value, Debt securities available for sale, Total	5
Federal agencies and U.S. government sponsored entities
Amortized cost:
Amortized Cost, Debt securities available for sale, Maturity of 1 Year or Less	0
Amortized Cost, Debt securities available for sale, Maturity of 1-5 Years	251
Amortized Cost, Debt securities available for sale, Maturity of 5-10 Years	1,641
Amortized Cost, Debt securities available for sale, Maturity After 10 Years	18,876
Amortized Cost, Debt securities available for sale, Total	20,768
Amortized Cost, Debt securities held to maturity, Maturity of 1 Year or Less	0
Amortized Cost, Debt securities held to maturity, Maturity of 1-5 Years	0
Amortized Cost, Debt securities held to maturity, Maturity of 5-10 Years	0
Amortized Cost, Debt securities held to maturity, Maturity After 10 Years	3,345
Amortized Cost, Debt securities held to maturity, Total	3,345
Fair value:
Fair Value, Debt securities available for sale, Maturity of 1 Year or Less	0
Fair Value, Debt securities available for sale, Maturity of 1-5 Years	247
Fair Value, Debt securities available for sale, Maturity of 5-10 Years	1,634
Fair Value, Debt securities available for sale, Maturity After 10 Years	18,616
Fair Value, Debt securities available for sale, Total	20,497
Fair Value, Debt securities held to maturity, Maturity of 1 Year or Less	0
Fair Value, Debt securities held to maturity, Maturity of 1-5 Years	0
Fair Value, Debt securities held to maturity, Maturity of 5-10 Years	0
Fair Value, Debt securities held to maturity, Maturity After 10 Years	3,267
Fair Value, Debt securities held to maturity, Total	3,267
Other/non-agency
Amortized cost:
Amortized Cost, Debt securities available for sale, Maturity of 1 Year or Less	2
Amortized Cost, Debt securities available for sale, Maturity of 1-5 Years	8
Amortized Cost, Debt securities available for sale, Maturity of 5-10 Years	0
Amortized Cost, Debt securities available for sale, Maturity After 10 Years	906
Amortized Cost, Debt securities available for sale, Total	916
Fair value:
Fair Value, Debt securities available for sale, Maturity of 1 Year or Less	2
Fair Value, Debt securities available for sale, Maturity of 1-5 Years	8
Fair Value, Debt securities available for sale, Maturity of 5-10 Years	0
Fair Value, Debt securities available for sale, Maturity After 10 Years	920
Fair Value, Debt securities available for sale, Total	$ 930

SECURITIES - Income Recognized

SECURITIES - Income Recognized from Investment Securities (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Gain (Loss) on Sale of Investments [Abstract]
Gains on sale of debt securities	$ 8	$ 8
Losses on sale of debt securities	0	0
Debt securities gains, net	$ 8	$ 8

SECURITIES - Schedule of Securi

SECURITIES - Schedule of Securities Pledged (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Pledged against repurchase agreements, Amortized Cost	$ 294	$ 344
Pledged against FHLB borrowed funds, Amortized Cost	0	745
Pledged against derivatives to qualify for fiduciary powers, and to secure public and other deposits as required by law, Amortized Cost	3,306	3,592
Pledged against repurchase agreements, Fair Value	294	338
Pledged against FHLB borrowed funds, Fair Value	0	752
Pledged against derivatives to qualify for fiduciary powers, and to secure public and other deposits as required by law, Fair Value	$ 3,248	$ 3,460

SECURITIES - Schedule of Inve_2

SECURITIES - Schedule of Investments in Continuous Loss Positions (Details) $ in Millions	Mar. 31, 2019USD ($)Securities	Dec. 31, 2018USD ($)Securities
Number of Issues
Less than 12 Months | Securities	13	176
12 Months or Longer | Securities	526	440
Total | Securities	539	616
Fair Value
Less than 12 Months	$ 569	$ 5,020
12 Months or Longer	17,596	15,196
Total	18,165	20,216
Gross Unrealized Losses
Less than 12 Months	(1)	(90)
12 Months or Longer	(419)	(654)
Total	$ (420)	$ (744)
Federal agencies and U.S. government sponsored entities
Number of Issues
Less than 12 Months | Securities	13	166
12 Months or Longer | Securities	519	429
Total | Securities	532	595
Fair Value
Less than 12 Months	$ 569	$ 4,881
12 Months or Longer	17,548	15,124
Total	18,117	20,005
Gross Unrealized Losses
Less than 12 Months	(1)	(89)
12 Months or Longer	(415)	(648)
Total	$ (416)	$ (737)
Other/non-agency
Number of Issues
Less than 12 Months | Securities	0	10
12 Months or Longer | Securities	7	11
Total | Securities	7	21
Fair Value
Less than 12 Months	$ 0	$ 139
12 Months or Longer	48	72
Total	48	211
Gross Unrealized Losses
Less than 12 Months	0	(1)
12 Months or Longer	(4)	(6)
Total	$ (4)	$ (7)

SECURITIES - Schedule of Cumula

SECURITIES - Schedule of Cumulative Credit Losses Recognized in Earnings (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Reductions for securities sold during the period	$ (4)	$ 0
Available-for-sale Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Cumulative balance at beginning of period	81	80
Credit impairments recognized in earnings on debt securities that have been previously impaired	1	1
Reductions due to increases in cash flow expectations on impaired securities	0	(1)
Cumulative balance at end of period	$ 78	$ 80

LOANS AND LEASES - Narrative (D

LOANS AND LEASES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale	$ 1,186		$ 1,219
Other loans held for sale	66		101
Proceeds from sale of loans		$ 0
Interest income on direct financing lease	20
Level 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale	1,186		1,219
Other loans held for sale	0		0
Residential loans held for sale | Level 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale	1,009		967
Commercial real estate loans held for sale | Level 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale	177		252
Retail | Education
Accounts, Notes, Loans and Financing Receivable [Line Items]
Payments for purchase of loans	201
Retail | Residential mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sale of loans	10
Retail | Retail TDRs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sale of loans	22
Retail | Home equity loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sale of loans	12
Retail | Residential mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans pledged as collateral for FHLB borrowed funds	23,700		25,600
Loans pledged as collateral to support the contingent ability to borrow at the FRB discount window	18,700		$ 16,800
Commercial | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Payments for purchase of loans		$ 200
Proceeds from sale of loans	$ 182
Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Lessee, Term Of Contract	3 years
Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Lessee, Term Of Contract	7 years

LOANS AND LEASES - Summary of L

LOANS AND LEASES - Summary of Loans and Leases Portfolio (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	$ 117,615	$ 116,660
Loans receivable held for sale	1,300	1,300
SBA Loans Serviced For Others | Banking and Other Subsidiaries
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	17	0
Mortgage loans serviced for others | Banking and Other Subsidiaries
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	70,800	69,600
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	57,689	56,783
Commercial | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	41,497	40,857
Commercial | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	13,372	13,023
Commercial | Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	2,820	2,903
Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	59,926	59,877
Retail | Residential mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	19,174	18,978
Retail | Home equity loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	1,006	1,073
Retail | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	12,394	12,710
Retail | Home equity loans serviced by others
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	375	399
Retail | Home equity lines of credit serviced by others
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	95	104
Retail | Automobile
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	11,992	12,106
Retail | Education
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	9,274	8,900
Retail | Credit cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	1,982	1,991
Retail | Other retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	$ 3,634	$ 3,616

LOANS AND LEASES - Components o

LOANS AND LEASES - Components of Net Investment (Details) $ in Millions	Mar. 31, 2019USD ($)
Receivables [Abstract]
Total future minimum lease rentals	$ 1,955
Estimated residual value of leased equipment (non-guaranteed)	1,082
Initial direct costs	13
Unearned income	(259)
Total leases	$ 2,791

LOANS AND LEASES - Maturity of

LOANS AND LEASES - Maturity of Direct Finance Lease (Details) $ in Millions	Mar. 31, 2019USD ($)
Sales-type and Direct Financing Leases, Lease Receivable, Fiscal Year Maturity [Abstract]
2019	$ 439
2020	463
2021	344
2022	263
2023	188
Thereafter	258
Total undiscounted future minimum lease rentals	$ 1,955

ALLOWANCE FOR CREDIT LOSSES, _3

ALLOWANCE FOR CREDIT LOSSES, NONPERFORMING ASSETS, AND CONCENTRATIONS OF CREDIT RISK - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Financing Receivable, Modifications [Line Items]
Nonperforming assets, net of valuation allowance	$ 34		$ 34
Mortgage loans collateralized by OREO	170		$ 172
Larger balance commercial loans minimum balance (greater than)	3
Net change to ALLL from modification	2	$ 1
Charge-offs from modification of loans	$ 1	1
High loan to value criteria (exceeds)	90.00%
Commercial | Commercial
Financing Receivable, Modifications [Line Items]
TDR's that defaulted within 12 months of modification date	$ 0	3
Retail | Retail
Financing Receivable, Modifications [Line Items]
TDR's that defaulted within 12 months of modification date	$ 9	$ 10

ALLOWANCE FOR CREDIT LOSSES, _4

ALLOWANCE FOR CREDIT LOSSES, NONPERFORMING ASSETS, AND CONCENTRATIONS OF CREDIT RISK - Summary of Changes in Allowance for Credit Losses (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan and lease losses / Reserve for unfunded lending commitments, Beginning balance	$ 1,242
Provision charged to income	85	$ 78
Allowance for loan and lease losses / Reserve for unfunded lending commitments, Ending balance	1,245
Allowance for loan and lease losses
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan and lease losses / Reserve for unfunded lending commitments, Beginning balance	1,242	1,236
Charge-offs	(138)	(116)
Recoveries	49	46
Net charge-offs	(89)	(70)
Provision charged to income	92	80
Allowance for loan and lease losses / Reserve for unfunded lending commitments, Ending balance	1,245	1,246
Reserve for unfunded lending commitments
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan and lease losses / Reserve for unfunded lending commitments, Beginning balance	91	88
Provision for unfunded lending commitments	(7)	(2)
Allowance for loan and lease losses / Reserve for unfunded lending commitments, Ending balance	84	86
Allowance for loan and lease losses and reserve for off-balance sheet activities, total
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan and lease losses / Reserve for unfunded lending commitments, Ending balance	1,329	1,332
Commercial | Allowance for loan and lease losses
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan and lease losses / Reserve for unfunded lending commitments, Beginning balance	690	685
Charge-offs	(26)	(3)
Recoveries	2	6
Net charge-offs	(24)	3
Provision charged to income	25	23
Allowance for loan and lease losses / Reserve for unfunded lending commitments, Ending balance	691	711
Commercial | Reserve for unfunded lending commitments
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan and lease losses / Reserve for unfunded lending commitments, Beginning balance	91	88
Provision for unfunded lending commitments	(7)	(2)
Allowance for loan and lease losses / Reserve for unfunded lending commitments, Ending balance	84	86
Commercial | Allowance for loan and lease losses and reserve for off-balance sheet activities, total
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan and lease losses / Reserve for unfunded lending commitments, Ending balance	775	797
Retail | Allowance for loan and lease losses
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan and lease losses / Reserve for unfunded lending commitments, Beginning balance	552	551
Charge-offs	(112)	(113)
Recoveries	47	40
Net charge-offs	(65)	(73)
Provision charged to income	67	57
Allowance for loan and lease losses / Reserve for unfunded lending commitments, Ending balance	554	535
Retail | Reserve for unfunded lending commitments
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan and lease losses / Reserve for unfunded lending commitments, Beginning balance	0	0
Provision for unfunded lending commitments	0	0
Allowance for loan and lease losses / Reserve for unfunded lending commitments, Ending balance	0	0
Retail | Allowance for loan and lease losses and reserve for off-balance sheet activities, total
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan and lease losses / Reserve for unfunded lending commitments, Ending balance	$ 554	$ 535

ALLOWANCE FOR CREDIT LOSSES, _5

ALLOWANCE FOR CREDIT LOSSES, NONPERFORMING ASSETS, AND CONCENTRATIONS OF CREDIT RISK - Recorded Investment in Loan and Leases (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment [Line Items]
Individually evaluated	$ 1,082	$ 1,114
Formula-based evaluation	116,533	115,546
Total	117,615	116,660
Commercial
Financing Receivable, Recorded Investment [Line Items]
Individually evaluated	386	391
Formula-based evaluation	57,303	56,392
Total	57,689	56,783
Retail
Financing Receivable, Recorded Investment [Line Items]
Individually evaluated	696	723
Formula-based evaluation	59,230	59,154
Total	$ 59,926	$ 59,877

ALLOWANCE FOR CREDIT LOSSES, _6

ALLOWANCE FOR CREDIT LOSSES, NONPERFORMING ASSETS, AND CONCENTRATIONS OF CREDIT RISK - Summary of Allowance for Credit Losses by Evaluation Method (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated	$ 67	$ 64
Formula-based evaluation	1,262	1,269
Allowance for credit losses	1,329	1,333
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated	42	38
Formula-based evaluation	733	743
Allowance for credit losses	775	781
Retail
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated	25	26
Formula-based evaluation	529	526
Allowance for credit losses	$ 554	$ 552

ALLOWANCE FOR CREDIT LOSSES, _7

ALLOWANCE FOR CREDIT LOSSES, NONPERFORMING ASSETS, AND CONCENTRATIONS OF CREDIT RISK - Recorded Investment in Commercial Loans and Leases by Regulatory Classification Ratings (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment [Line Items]
Total	$ 117,615	$ 116,660
Commercial
Financing Receivable, Recorded Investment [Line Items]
Total	57,689	56,783
Commercial | Pass
Financing Receivable, Recorded Investment [Line Items]
Total	54,919	53,946
Commercial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total	1,588	1,682
Commercial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total	967	951
Commercial | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total	215	204
Commercial | Commercial
Financing Receivable, Recorded Investment [Line Items]
Total	41,497	40,857
Commercial | Commercial | Pass
Financing Receivable, Recorded Investment [Line Items]
Total	39,296	38,600
Commercial | Commercial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total	1,096	1,231
Commercial | Commercial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total	892	828
Commercial | Commercial | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total	213	198
Commercial | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Total	13,372	13,023
Commercial | Commercial real estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Total	12,953	12,523
Commercial | Commercial real estate | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total	381	412
Commercial | Commercial real estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total	36	82
Commercial | Commercial real estate | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total	2	6
Commercial | Leases
Financing Receivable, Recorded Investment [Line Items]
Total	2,820	2,903
Commercial | Leases | Pass
Financing Receivable, Recorded Investment [Line Items]
Total	2,670	2,823
Commercial | Leases | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total	111	39
Commercial | Leases | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total	39	41
Commercial | Leases | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total	$ 0	$ 0

ALLOWANCE FOR CREDIT LOSSES, _8

ALLOWANCE FOR CREDIT LOSSES, NONPERFORMING ASSETS, AND CONCENTRATIONS OF CREDIT RISK - Recorded Investment in Retail Loans by Delinquency Status (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 1,217	$ 1,257
Total	117,615	116,660
Financing Receivables, 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	529	493
Financing Receivables 60 To 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	215	177
Financing Receivables 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	473	587
Retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	57,046	56,883
Past Due	936	1,039
Total	59,926	59,877
Retail | Residential mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	18,876	18,664
Past Due	179	183
Total	19,174	18,978
Retail | Home equity loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	883	945
Past Due	43	53
Total	1,006	1,073
Retail | Home equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	11,769	12,042
Past Due	259	282
Total	12,394	12,710
Retail | Home equity loans serviced by others
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	332	355
Past Due	21	23
Total	375	399
Retail | Home equity lines of credit serviced by others
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	67	79
Past Due	14	10
Total	95	104
Retail | Automobile
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	10,654	10,729
Past Due	271	338
Total	11,992	12,106
Retail | Education
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	9,084	8,694
Past Due	48	47
Total	9,274	8,900
Retail | Credit cards
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,879	1,894
Past Due	44	44
Total	1,982	1,991
Retail | Other retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	3,502	3,481
Past Due	57	59
Total	3,634	3,616
Retail | Financing Receivables, 1 to 29 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,944	1,955
Retail | Financing Receivables, 1 to 29 Days Past Due | Residential mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	119	131
Retail | Financing Receivables, 1 to 29 Days Past Due | Home equity loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	80	75
Retail | Financing Receivables, 1 to 29 Days Past Due | Home equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	366	386
Retail | Financing Receivables, 1 to 29 Days Past Due | Home equity loans serviced by others
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	22	21
Retail | Financing Receivables, 1 to 29 Days Past Due | Home equity lines of credit serviced by others
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	14	15
Retail | Financing Receivables, 1 to 29 Days Past Due | Automobile
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,067	1,039
Retail | Financing Receivables, 1 to 29 Days Past Due | Education
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	142	159
Retail | Financing Receivables, 1 to 29 Days Past Due | Credit cards
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	59	53
Retail | Financing Receivables, 1 to 29 Days Past Due | Other retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	75	76
Retail | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	395	393
Retail | Financing Receivables, 30 to 59 Days Past Due | Residential mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	38	37
Retail | Financing Receivables, 30 to 59 Days Past Due | Home equity loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	12	12
Retail | Financing Receivables, 30 to 59 Days Past Due | Home equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	76	65
Retail | Financing Receivables, 30 to 59 Days Past Due | Home equity loans serviced by others
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	8	7
Retail | Financing Receivables, 30 to 59 Days Past Due | Home equity lines of credit serviced by others
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2	2
Retail | Financing Receivables, 30 to 59 Days Past Due | Automobile
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	196	207
Retail | Financing Receivables, 30 to 59 Days Past Due | Education
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	22	23
Retail | Financing Receivables, 30 to 59 Days Past Due | Credit cards
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	14	14
Retail | Financing Receivables, 30 to 59 Days Past Due | Other retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	27	26
Retail | Financing Receivables 60 To 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	141	142
Retail | Financing Receivables 60 To 89 Days Past Due | Residential mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	10	13
Retail | Financing Receivables 60 To 89 Days Past Due | Home equity loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4	3
Retail | Financing Receivables 60 To 89 Days Past Due | Home equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	28	22
Retail | Financing Receivables 60 To 89 Days Past Due | Home equity loans serviced by others
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2	3
Retail | Financing Receivables 60 To 89 Days Past Due | Home equity lines of credit serviced by others
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1	1
Retail | Financing Receivables 60 To 89 Days Past Due | Automobile
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	58	59
Retail | Financing Receivables 60 To 89 Days Past Due | Education
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	12	13
Retail | Financing Receivables 60 To 89 Days Past Due | Credit cards
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	9	10
Retail | Financing Receivables 60 To 89 Days Past Due | Other retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	17	18
Retail | Financing Receivables 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	400	504
Retail | Financing Receivables 90 Days or More Past Due | Residential mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	131	133
Retail | Financing Receivables 90 Days or More Past Due | Home equity loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	27	38
Retail | Financing Receivables 90 Days or More Past Due | Home equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	155	195
Retail | Financing Receivables 90 Days or More Past Due | Home equity loans serviced by others
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	11	13
Retail | Financing Receivables 90 Days or More Past Due | Home equity lines of credit serviced by others
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	11	7
Retail | Financing Receivables 90 Days or More Past Due | Automobile
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	17	72
Retail | Financing Receivables 90 Days or More Past Due | Education
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	14	11
Retail | Financing Receivables 90 Days or More Past Due | Credit cards
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	21	20
Retail | Financing Receivables 90 Days or More Past Due | Other retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 13	$ 15

ALLOWANCE FOR CREDIT LOSSES, _9

ALLOWANCE FOR CREDIT LOSSES, NONPERFORMING ASSETS, AND CONCENTRATIONS OF CREDIT RISK - Nonperforming Loans and Leases by Class (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonperforming loans	$ 780	$ 797
Loans accruing and 90 days or more past due	32	25
GNMA
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonperforming loans sold with right to repurchase	144	133
Residential mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans accruing and 90 days or more past due	13	12
Commercial | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonperforming loans	208	194
Loans accruing and 90 days or more past due	1	1
Commercial | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonperforming loans	4	7
Loans accruing and 90 days or more past due	0	0
Commercial | Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonperforming loans	0	0
Loans accruing and 90 days or more past due	0	0
Commercial | Commercial Banking
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonperforming loans	212	201
Loans accruing and 90 days or more past due	1	1
Retail | Residential mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonperforming loans	138	136
Loans accruing and 90 days or more past due	20	15
Retail | Home equity loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonperforming loans	42	50
Loans accruing and 90 days or more past due	0	0
Retail | Home equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonperforming loans	217	231
Loans accruing and 90 days or more past due	0	0
Retail | Home equity loans serviced by others
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonperforming loans	15	17
Loans accruing and 90 days or more past due	0	0
Retail | Home equity lines of credit serviced by others
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonperforming loans	14	15
Loans accruing and 90 days or more past due	0	0
Retail | Automobile
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonperforming loans	70	81
Loans accruing and 90 days or more past due	0	0
Retail | Education
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonperforming loans	43	38
Loans accruing and 90 days or more past due	2	2
Retail | Credit cards
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonperforming loans	22	20
Loans accruing and 90 days or more past due	0	0
Retail | Other retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonperforming loans	7	8
Loans accruing and 90 days or more past due	9	7
Retail | Retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonperforming loans	568	596
Loans accruing and 90 days or more past due	$ 31	$ 24

ALLOWANCE FOR CREDIT LOSSES,_10

ALLOWANCE FOR CREDIT LOSSES, NONPERFORMING ASSETS, AND CONCENTRATIONS OF CREDIT RISK - Performance Indicators for Nonperforming Assets (Details)	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonperforming loans and leases as a percentage of total loans and leases	0.66%	0.68%
Nonperforming assets as a percentage of total assets	0.50%	0.52%
Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonperforming loans and leases as a percentage of total loans and leases	0.18%	0.17%
Nonperforming assets as a percentage of total assets	0.13%	0.13%
Retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonperforming loans and leases as a percentage of total loans and leases	0.48%	0.51%
Nonperforming assets as a percentage of total assets	0.37%	0.39%

ALLOWANCE FOR CREDIT LOSSES,_11

ALLOWANCE FOR CREDIT LOSSES, NONPERFORMING ASSETS, AND CONCENTRATIONS OF CREDIT RISK - Accruing and Nonaccruing Past Due Amounts (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 1,217	$ 1,257
Financing Receivables, 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	529	493
Financing Receivables 60 To 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	215	177
Financing Receivables 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	473	587
Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	281	218
Commercial | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	150	166
Commercial | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	123	45
Commercial | Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	8	7
Commercial | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	134	100
Commercial | Financing Receivables, 30 to 59 Days Past Due | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	70	85
Commercial | Financing Receivables, 30 to 59 Days Past Due | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	56	8
Commercial | Financing Receivables, 30 to 59 Days Past Due | Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	8	7
Commercial | Financing Receivables 60 To 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	74	35
Commercial | Financing Receivables 60 To 89 Days Past Due | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	9	3
Commercial | Financing Receivables 60 To 89 Days Past Due | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	65	32
Commercial | Financing Receivables 60 To 89 Days Past Due | Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Commercial | Financing Receivables 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	73	83
Commercial | Financing Receivables 90 Days or More Past Due | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	71	78
Commercial | Financing Receivables 90 Days or More Past Due | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2	5
Commercial | Financing Receivables 90 Days or More Past Due | Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	936	1,039
Retail | Residential mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	179	183
Retail | Home equity loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	43	53
Retail | Home equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	259	282
Retail | Home equity loans serviced by others
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	21	23
Retail | Home equity lines of credit serviced by others
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	14	10
Retail | Automobile
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	271	338
Retail | Education
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	48	47
Retail | Credit cards
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	44	44
Retail | Other retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	57	59
Retail | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	395	393
Retail | Financing Receivables, 30 to 59 Days Past Due | Residential mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	38	37
Retail | Financing Receivables, 30 to 59 Days Past Due | Home equity loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	12	12
Retail | Financing Receivables, 30 to 59 Days Past Due | Home equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	76	65
Retail | Financing Receivables, 30 to 59 Days Past Due | Home equity loans serviced by others
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	8	7
Retail | Financing Receivables, 30 to 59 Days Past Due | Home equity lines of credit serviced by others
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2	2
Retail | Financing Receivables, 30 to 59 Days Past Due | Automobile
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	196	207
Retail | Financing Receivables, 30 to 59 Days Past Due | Education
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	22	23
Retail | Financing Receivables, 30 to 59 Days Past Due | Credit cards
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	14	14
Retail | Financing Receivables, 30 to 59 Days Past Due | Other retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	27	26
Retail | Financing Receivables 60 To 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	141	142
Retail | Financing Receivables 60 To 89 Days Past Due | Residential mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	10	13
Retail | Financing Receivables 60 To 89 Days Past Due | Home equity loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4	3
Retail | Financing Receivables 60 To 89 Days Past Due | Home equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	28	22
Retail | Financing Receivables 60 To 89 Days Past Due | Home equity loans serviced by others
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2	3
Retail | Financing Receivables 60 To 89 Days Past Due | Home equity lines of credit serviced by others
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1	1
Retail | Financing Receivables 60 To 89 Days Past Due | Automobile
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	58	59
Retail | Financing Receivables 60 To 89 Days Past Due | Education
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	12	13
Retail | Financing Receivables 60 To 89 Days Past Due | Credit cards
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	9	10
Retail | Financing Receivables 60 To 89 Days Past Due | Other retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	17	18
Retail | Financing Receivables 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	400	504
Retail | Financing Receivables 90 Days or More Past Due | Residential mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	131	133
Retail | Financing Receivables 90 Days or More Past Due | Home equity loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	27	38
Retail | Financing Receivables 90 Days or More Past Due | Home equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	155	195
Retail | Financing Receivables 90 Days or More Past Due | Home equity loans serviced by others
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	11	13
Retail | Financing Receivables 90 Days or More Past Due | Home equity lines of credit serviced by others
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	11	7
Retail | Financing Receivables 90 Days or More Past Due | Automobile
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	17	72
Retail | Financing Receivables 90 Days or More Past Due | Education
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	14	11
Retail | Financing Receivables 90 Days or More Past Due | Credit cards
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	21	20
Retail | Financing Receivables 90 Days or More Past Due | Other retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 13	$ 15

ALLOWANCE FOR CREDIT LOSSES,_12

ALLOWANCE FOR CREDIT LOSSES, NONPERFORMING ASSETS, AND CONCENTRATIONS OF CREDIT RISK - Impaired Loans by Class (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired Loans With a Related Allowance	$ 452	$ 483
Allowance on Impaired Loans	67	64
Impaired Loans Without a Related Allowance	630	631
Unpaid Contractual Balance	1,299	1,363
Total Recorded Investment in Impaired Loans	1,082	1,114
Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired Loans With a Related Allowance	195	218
Allowance on Impaired Loans	42	38
Impaired Loans Without a Related Allowance	191	173
Unpaid Contractual Balance	461	488
Total Recorded Investment in Impaired Loans	386	391
Commercial | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired Loans With a Related Allowance	195	186
Allowance on Impaired Loans	42	31
Impaired Loans Without a Related Allowance	165	167
Unpaid Contractual Balance	415	450
Total Recorded Investment in Impaired Loans	360	353
Commercial | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired Loans With a Related Allowance	0	32
Allowance on Impaired Loans	0	7
Impaired Loans Without a Related Allowance	26	6
Unpaid Contractual Balance	46	38
Total Recorded Investment in Impaired Loans	26	38
Commercial | Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired Loans With a Related Allowance	0	0
Allowance on Impaired Loans	0	0
Impaired Loans Without a Related Allowance	0	0
Unpaid Contractual Balance	0	0
Total Recorded Investment in Impaired Loans	0	0
Retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired Loans With a Related Allowance	257	265
Allowance on Impaired Loans	25	26
Impaired Loans Without a Related Allowance	439	458
Unpaid Contractual Balance	838	875
Total Recorded Investment in Impaired Loans	696	723
Retail | Residential mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired Loans With a Related Allowance	28	28
Allowance on Impaired Loans	2	2
Impaired Loans Without a Related Allowance	118	127
Unpaid Contractual Balance	188	201
Total Recorded Investment in Impaired Loans	146	155
Retail | Home equity loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired Loans With a Related Allowance	30	34
Allowance on Impaired Loans	2	3
Impaired Loans Without a Related Allowance	70	76
Unpaid Contractual Balance	135	148
Total Recorded Investment in Impaired Loans	100	110
Retail | Home equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired Loans With a Related Allowance	23	21
Allowance on Impaired Loans	1	1
Impaired Loans Without a Related Allowance	179	181
Unpaid Contractual Balance	243	244
Total Recorded Investment in Impaired Loans	202	202
Retail | Home equity loans serviced by others
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired Loans With a Related Allowance	20	22
Allowance on Impaired Loans	1	1
Impaired Loans Without a Related Allowance	19	19
Unpaid Contractual Balance	51	54
Total Recorded Investment in Impaired Loans	39	41
Retail | Home equity lines of credit serviced by others
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired Loans With a Related Allowance	1	1
Allowance on Impaired Loans	0	0
Impaired Loans Without a Related Allowance	6	7
Unpaid Contractual Balance	10	11
Total Recorded Investment in Impaired Loans	7	8
Retail | Automobile
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired Loans With a Related Allowance	1	1
Allowance on Impaired Loans	0	0
Impaired Loans Without a Related Allowance	21	22
Unpaid Contractual Balance	30	31
Total Recorded Investment in Impaired Loans	22	23
Retail | Education
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired Loans With a Related Allowance	126	130
Allowance on Impaired Loans	10	11
Impaired Loans Without a Related Allowance	23	23
Unpaid Contractual Balance	149	153
Total Recorded Investment in Impaired Loans	149	153
Retail | Credit cards
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired Loans With a Related Allowance	25	24
Allowance on Impaired Loans	8	7
Impaired Loans Without a Related Allowance	0	1
Unpaid Contractual Balance	25	25
Total Recorded Investment in Impaired Loans	25	25
Retail | Other retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired Loans With a Related Allowance	3	4
Allowance on Impaired Loans	1	1
Impaired Loans Without a Related Allowance	3	2
Unpaid Contractual Balance	7	8
Total Recorded Investment in Impaired Loans	$ 6	$ 6

ALLOWANCE FOR CREDIT LOSSES,_13

ALLOWANCE FOR CREDIT LOSSES, NONPERFORMING ASSETS, AND CONCENTRATIONS OF CREDIT RISK - Additional Impaired Loan Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Interest Income Recognized	$ 11	$ 10
Average Recorded Investment	1,014	1,065
Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Interest Income Recognized	3	2
Average Recorded Investment	327	320
Commercial | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Interest Income Recognized	3	2
Average Recorded Investment	301	293
Commercial | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Interest Income Recognized	0	0
Average Recorded Investment	26	27
Commercial | Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Interest Income Recognized	0	0
Average Recorded Investment	0	0
Retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Interest Income Recognized	8	8
Average Recorded Investment	687	745
Retail | Residential mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Interest Income Recognized	1	1
Average Recorded Investment	143	149
Retail | Home equity loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Interest Income Recognized	2	2
Average Recorded Investment	101	118
Retail | Home equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Interest Income Recognized	2	2
Average Recorded Investment	196	194
Retail | Home equity loans serviced by others
Financing Receivable, Recorded Investment, Past Due [Line Items]
Interest Income Recognized	1	1
Average Recorded Investment	39	50
Retail | Home equity lines of credit serviced by others
Financing Receivable, Recorded Investment, Past Due [Line Items]
Interest Income Recognized	0	0
Average Recorded Investment	7	9
Retail | Automobile
Financing Receivable, Recorded Investment, Past Due [Line Items]
Interest Income Recognized	0	0
Average Recorded Investment	21	22
Retail | Education
Financing Receivable, Recorded Investment, Past Due [Line Items]
Interest Income Recognized	2	2
Average Recorded Investment	150	171
Retail | Credit cards
Financing Receivable, Recorded Investment, Past Due [Line Items]
Interest Income Recognized	0	0
Average Recorded Investment	24	24
Retail | Other retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Interest Income Recognized	0	0
Average Recorded Investment	$ 6	$ 8

ALLOWANCE FOR CREDIT LOSSES,_14

ALLOWANCE FOR CREDIT LOSSES, NONPERFORMING ASSETS, AND CONCENTRATIONS OF CREDIT RISK - Unfunded Commitments (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unfunded commitments related to TDRs	$ 25	$ 30
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
TDR balance included in impaired loans	296	304
Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
TDR balance included in impaired loans	$ 696	$ 723

ALLOWANCE FOR CREDIT LOSSES,_15

ALLOWANCE FOR CREDIT LOSSES, NONPERFORMING ASSETS, AND CONCENTRATIONS OF CREDIT RISK - Troubled Debt Restructuring (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)contract	Mar. 31, 2018USD ($)contract
Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	681	668
Recorded Investment | $	$ 10	$ 7
Maturity Extension
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	56	73
Recorded Investment | $	$ 9	$ 8
Other
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	537	591
Recorded Investment | $	$ 59	$ 95
Commercial | Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	1
Recorded Investment | $	$ 0	$ 0
Commercial | Maturity Extension
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	5	7
Recorded Investment | $	$ 1	$ 1
Commercial | Other
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	12	18
Recorded Investment | $	$ 40	$ 75
Commercial | Commercial | Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	1
Recorded Investment | $	$ 0	$ 0
Commercial | Commercial | Maturity Extension
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	5	6
Recorded Investment | $	$ 1	$ 1
Commercial | Commercial | Other
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	12	18
Recorded Investment | $	$ 40	$ 75
Commercial | Commercial real estate | Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	0
Recorded Investment | $	$ 0	$ 0
Commercial | Commercial real estate | Maturity Extension
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	1
Recorded Investment | $	$ 0	$ 0
Commercial | Commercial real estate | Other
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	0
Recorded Investment | $	$ 0	$ 0
Retail | Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	681	667
Recorded Investment | $	$ 10	$ 7
Retail | Maturity Extension
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	51	66
Recorded Investment | $	$ 8	$ 7
Retail | Other
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	525	573
Recorded Investment | $	$ 19	$ 20
Retail | Residential mortgages | Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	4	7
Recorded Investment | $	$ 2	$ 1
Retail | Residential mortgages | Maturity Extension
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	11	7
Recorded Investment | $	$ 2	$ 1
Retail | Residential mortgages | Other
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	30	53
Recorded Investment | $	$ 4	$ 6
Retail | Home equity loans | Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	7	11
Recorded Investment | $	$ 0	$ 1
Retail | Home equity loans | Maturity Extension
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	0
Recorded Investment | $	$ 0	$ 0
Retail | Home equity loans | Other
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	27	32
Recorded Investment | $	$ 1	$ 2
Retail | Home equity lines of credit | Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	29	15
Recorded Investment | $	$ 4	$ 1
Retail | Home equity lines of credit | Maturity Extension
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	35	42
Recorded Investment | $	$ 6	$ 5
Retail | Home equity lines of credit | Other
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	105	93
Recorded Investment | $	$ 8	$ 7
Retail | Home equity loans serviced by others | Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	1
Recorded Investment | $	$ 0	$ 0
Retail | Home equity loans serviced by others | Maturity Extension
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	0
Recorded Investment | $	$ 0	$ 0
Retail | Home equity loans serviced by others | Other
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	4	7
Recorded Investment | $	$ 0	$ 0
Retail | Home equity lines of credit serviced by others | Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	2
Recorded Investment | $	$ 0	$ 0
Retail | Home equity lines of credit serviced by others | Maturity Extension
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	0
Recorded Investment | $	$ 0	$ 0
Retail | Home equity lines of credit serviced by others | Other
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	2	3
Recorded Investment | $	$ 0	$ 0
Retail | Automobile | Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	25	36
Recorded Investment | $	$ 0	$ 1
Retail | Automobile | Maturity Extension
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	5	17
Recorded Investment | $	$ 0	$ 1
Retail | Automobile | Other
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	289	269
Recorded Investment | $	$ 4	$ 4
Retail | Education | Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	0
Recorded Investment | $	$ 0	$ 0
Retail | Education | Maturity Extension
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	0
Recorded Investment | $	$ 0	$ 0
Retail | Education | Other
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	67	112
Recorded Investment | $	$ 2	$ 1
Retail | Credit cards | Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	616	594
Recorded Investment | $	$ 4	$ 3
Retail | Credit cards | Maturity Extension
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	0
Recorded Investment | $	$ 0	$ 0
Retail | Credit cards | Other
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	0
Recorded Investment | $	$ 0	$ 0
Retail | Other retail | Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	1
Recorded Investment | $	$ 0	$ 0
Retail | Other retail | Maturity Extension
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	0
Recorded Investment | $	$ 0	$ 0
Retail | Other retail | Other
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	1	4
Recorded Investment | $	$ 0	$ 0

ALLOWANCE FOR CREDIT LOSSES,_16

ALLOWANCE FOR CREDIT LOSSES, NONPERFORMING ASSETS, AND CONCENTRATIONS OF CREDIT RISK - Loans with Indicators of High Credit Risk (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment [Line Items]
Total	$ 117,615	$ 116,660
High loan-to-value
Financing Receivable, Recorded Investment [Line Items]
Total	555	553
High loan-to-value | Residential Mortgages
Financing Receivable, Recorded Investment [Line Items]
Total	342	318
High loan-to-value | Home Equity Loans and Lines of Credit
Financing Receivable, Recorded Investment [Line Items]
Total	79	87
High loan-to-value | Home Equity Products Serviced by Others
Financing Receivable, Recorded Investment [Line Items]
Total	134	148
High loan-to-value | Credit Cards
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
High loan-to-value | Education
Financing Receivable, Recorded Investment [Line Items]
Total		0
Interest-only/negative amortization
Financing Receivable, Recorded Investment [Line Items]
Total	1,724	1,795
Interest-only/negative amortization | Residential Mortgages
Financing Receivable, Recorded Investment [Line Items]
Total	1,724	1,794
Interest-only/negative amortization | Home Equity Loans and Lines of Credit
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Interest-only/negative amortization | Home Equity Products Serviced by Others
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Interest-only/negative amortization | Credit Cards
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Interest-only/negative amortization | Education
Financing Receivable, Recorded Investment [Line Items]
Total		1
Low introductory rate
Financing Receivable, Recorded Investment [Line Items]
Total	219	217
Low introductory rate | Residential Mortgages
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Low introductory rate | Home Equity Loans and Lines of Credit
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Low introductory rate | Home Equity Products Serviced by Others
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Low introductory rate | Credit Cards
Financing Receivable, Recorded Investment [Line Items]
Total	219	217
Low introductory rate | Education
Financing Receivable, Recorded Investment [Line Items]
Total		0
Multiple characteristics and other
Financing Receivable, Recorded Investment [Line Items]
Total	2	1
Multiple characteristics and other | Residential Mortgages
Financing Receivable, Recorded Investment [Line Items]
Total	2	1
Multiple characteristics and other | Home Equity Loans and Lines of Credit
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Multiple characteristics and other | Home Equity Products Serviced by Others
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Multiple characteristics and other | Credit Cards
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Multiple characteristics and other | Education
Financing Receivable, Recorded Investment [Line Items]
Total		0
Credit risk, loans with increased credit exposure
Financing Receivable, Recorded Investment [Line Items]
Total	2,500	2,566
Credit risk, loans with increased credit exposure | Residential Mortgages
Financing Receivable, Recorded Investment [Line Items]
Total	2,068	2,113
Credit risk, loans with increased credit exposure | Home Equity Loans and Lines of Credit
Financing Receivable, Recorded Investment [Line Items]
Total	79	87
Credit risk, loans with increased credit exposure | Home Equity Products Serviced by Others
Financing Receivable, Recorded Investment [Line Items]
Total	134	148
Credit risk, loans with increased credit exposure | Credit Cards
Financing Receivable, Recorded Investment [Line Items]
Total	$ 219	217
Credit risk, loans with increased credit exposure | Education
Financing Receivable, Recorded Investment [Line Items]
Total		$ 1

MORTGAGE BANKING - Residential

MORTGAGE BANKING - Residential Mortgage Loan Sales (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Residential mortgage loans sold with servicing retained	$ 2,918	$ 655
Residential mortgages
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Residential mortgage loans sold with servicing retained	2,919	655
Mortgage banking fees
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Gain on sales	37	13
Contractually specified servicing, late and other anciliary fees	$ 48	$ 15

MORTGAGE BANKING - Changes Rela

MORTGAGE BANKING - Changes Related to MSRs - Amortization Method (Details) - Residential mortgages - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
MSRs:
Balance as of beginning of period	$ 221	$ 201
Amount capitalized	0	8
Amortization	(9)	(8)
Carrying amount before valuation allowance	212	201
Valuation allowance for servicing assets:
Balance at beginning of period	0	3
Valuation recoveries	0	(3)
Balance at end of period	0	0
Net carrying value of MSRs	$ 212	$ 201

MORTGAGE BANKING - Narrative (D

MORTGAGE BANKING - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Participating Mortgage Loans [Line Items]
MSR portfolio fair value	$ 563	$ 600
Residential mortgages
Participating Mortgage Loans [Line Items]
MSR portfolio fair value	$ 563	$ 600	$ 0

MORTGAGE BANKING - Changes Re_2

MORTGAGE BANKING - Changes Related to MSRs - Fair Value Method (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Servicing Assets at Fair Value [Line Items]
MSR portfolio fair value	$ 600
MSRs
Fair value as of beginning of period	600
Fair value at end of the period	563
Residential mortgages
Servicing Assets at Fair Value [Line Items]
MSR portfolio fair value	600	$ 0
MSRs
Fair value as of beginning of period	600
Amounts capitalized	35
Changes in unpaid principal balance during the period	(26)
Changes in fair value during the period	(46)
Fair value at end of the period	$ 563

MORTGAGE BANKING - Economic Ass

MORTGAGE BANKING - Economic Assumptions Used to Estimate Value of MSRs (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Servicing Assets And Servicing Liabilities At Amortized Cost, Assumptions Used To Estimate Fair Value [Abstract]
MRS portfolio fair value	$ 224	$ 243
Weighted average life (in years)	6 years 1 month 10 days	6 years 6 months
Weighted average constant prepayment rate	9.60%	8.50%
Weighted average discount rate	9.30%	9.30%
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value [Abstract]
MSR portfolio fair value	$ 563	$ 600
Weighted average life (in years)	6 years 8 months 12 days	8 years
Weighted average constant prepayment rate	10.70%	8.20%
Weighted average option adjusted spread	5.68%	6.09%
Minimum
Servicing Assets at Fair Value [Line Items]
Sensitivity analysis, basis spread	0.50%	0.50%
Servicing Assets And Servicing Liabilities At Amortized Cost, Assumptions Used To Estimate Fair Value [Abstract]
Decline in fair value due to 50 bps decrease in prepayment rate	$ 27	$ 24
Decline in fair value due to 50 bps decrease in discount rate	4	5
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value [Abstract]
Decline in fair value due to 50 bps decrease in prepayment rate	81	68
Decline in fair value due to 50 bps decrease in option adjusted spread	$ 11	$ 13
Maximum
Servicing Assets at Fair Value [Line Items]
Sensitivity analysis, basis spread	1.00%	1.00%
Servicing Assets And Servicing Liabilities At Amortized Cost, Assumptions Used To Estimate Fair Value [Abstract]
Decline in fair value due to 100 bps decrease in prepayment rate	$ 58	$ 56
Decline in fair value due to 100 bps decrease in discount rate	8	9
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value [Abstract]
Decline in fair value due to 100 bps decrease in prepayment rate	177	148
Decline in fair value due to 100 bps decrease in option adjusted spread	$ 22	$ 26

LEASES - Narrative (Details)

LEASES - Narrative (Details)	Mar. 31, 2019
Lessee, Lease, Description [Line Items]
Weighted average lease term	7 years
Weighted average discount rate	3.23%
Minimum
Lessee, Lease, Description [Line Items]
Lease term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Lease term	10 years

LEASES - Components of Operatin

LEASES - Components of Operating Lease Cost (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)
Leases [Abstract]
Operating lease cost	$ 40
Short-term lease cost	3
Variable lease cost	2
Sublease income	(1)
Total	$ 44

LEASES - Supplemental Balance S

LEASES - Supplemental Balance Sheet Information (Details) $ in Millions	Mar. 31, 2019USD ($)
Leases [Abstract]
Operating lease right-of-use assets	$ 746
Operating lease liabilities	$ 762

LEASES - Supplemental Lease Inf

LEASES - Supplemental Lease Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)
Cash paid for amounts included in measurement of liabilities:
Operating cash flows from operating leases	$ 39
Right-of-use assets in exchange for new operating lease liabilities	$ 47

LEASES - Liability Maturity Sch

LEASES - Liability Maturity Schedule (Details) $ in Millions	Mar. 31, 2019USD ($)
Operating Lease Liabilities, Payments Due [Abstract]
2019	$ 108
2020	157
2021	140
2022	115
2023	90
Thereafter	249
Total lease payments	859
Less interest	97
Present value of lease liabilities	$ 762

VARIABLE INTEREST ENTITIES - Na

VARIABLE INTEREST ENTITIES - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Variable Interest Entity
Lending to special purpose entities included in loans and leases	$ 117,615,000,000		$ 116,660,000,000
LIHTC Investments
Variable Interest Entity
Net impairment losses recognized in earnings	0	$ 0
Commercial | Special Purpose Entities
Variable Interest Entity
Lending to special purpose entities included in loans and leases	728,000,000		613,000,000
Commitments to extend credit | Special Purpose Entities
Variable Interest Entity
Commitment amount	$ 677,000,000		$ 584,000,000

VARIABLE INTEREST ENTITIES - Sc

VARIABLE INTEREST ENTITIES - Schedule of Variable Interest Entities (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Variable Interest Entity
Lending to special purpose entities included in loans and leases	$ 117,615	$ 116,660
LIHTC Investments
Variable Interest Entity
LIHTC investment included in other assets	1,263	1,236
LIHTC unfunded commitments included in other liabilities	676	673
Renewable Energy
Variable Interest Entity
Renewable energy investments included in other assets	315	319
Commercial | Special Purpose Entities
Variable Interest Entity
Lending to special purpose entities included in loans and leases	$ 728	$ 613

VARIABLE INTEREST ENTITIES - _2

VARIABLE INTEREST ENTITIES - Schedule of Affordable Housing Tax Credit Investments (Details) - LIHTC Investments - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Variable Interest Entity
Tax credits included in income tax expense	$ 35	$ 25
Amortization expense included in income tax expense	37	27
Other tax benefits included in income tax expense	$ 8	$ 6

BORROWED FUNDS - Short Term Deb

BORROWED FUNDS - Short Term Debt (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Short-term Debt [Line Items]
Total short-term borrowed funds	$ 679	$ 1,317
Federal funds purchased
Short-term Debt [Line Items]
Total short-term borrowed funds	375	820
Securities sold under agreements to repurchase
Short-term Debt [Line Items]
Total short-term borrowed funds	293	336
Other short-term borrowed funds
Short-term Debt [Line Items]
Total short-term borrowed funds	$ 11	$ 161

BORROWED FUNDS - Short Term Bor

BORROWED FUNDS - Short Term Borrowed Debt Key Data (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Federal funds purchased and securities sold under agreements to repurchase
Short-term Debt [Line Items]
Weighted-average interest rate at period end	1.39%	0.00%	1.72%
Maximum amount outstanding at month-end during the period	$ 1,134	$ 625	$ 1,282
Average amount outstanding during the period	$ 640	$ 645	$ 654
Weighted-average interest rate during the period	1.24%	0.66%	0.92%
Other short-term borrowed funds
Short-term Debt [Line Items]
Weighted-average interest rate at period end	3.03%	3.40%	2.73%
Maximum amount outstanding at month-end during the period	$ 511	$ 1,110	$ 1,110
Average amount outstanding during the period	$ 58	$ 588	$ 467
Weighted-average interest rate during the period	2.75%	1.67%	2.10%

BORROWED FUNDS - Long Term Debt

BORROWED FUNDS - Long Term Debt (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Long-term borrowed funds	$ 11,725	$ 15,925
Parent Company
Debt Instrument [Line Items]
Long-term borrowed funds	1,988
Parent Company | Subordinated Debt | 4.150% fixed-rate subordinated debt, due September 2022
Debt Instrument [Line Items]
Long-term borrowed funds	$ 348	348
Interest rate	4.15%
Parent Company | Subordinated Debt | 3.750% fixed-rate subordinated debt, due July 2024
Debt Instrument [Line Items]
Long-term borrowed funds	$ 250	250
Interest rate	3.75%
Parent Company | Subordinated Debt | 4.023% fixed-rate subordinated debt, due October 2024
Debt Instrument [Line Items]
Long-term borrowed funds	$ 42	42
Interest rate	4.023%
Parent Company | Subordinated Debt | 4.350% fixed-rate subordinated debt, due August 2025
Debt Instrument [Line Items]
Long-term borrowed funds	$ 249	249
Interest rate	4.35%
Parent Company | Subordinated Debt | 4.300% fixed-rate subordinated debt, due December 2025
Debt Instrument [Line Items]
Long-term borrowed funds	$ 750	749
Interest rate	4.30%
Parent Company | Senior Unsecured Notes | 2.375% fixed-rate senior unsecured debt, due July 2021
Debt Instrument [Line Items]
Long-term borrowed funds	$ 349	349
Interest rate	2.375%
Banking and Other Subsidiaries
Debt Instrument [Line Items]
Long-term borrowed funds	$ 9,737
Banking and Other Subsidiaries | Senior Unsecured Notes | 2.500% senior unsecured notes, due 2019
Debt Instrument [Line Items]
Long-term borrowed funds	$ 0	748
Interest rate	2.50%
Banking and Other Subsidiaries | Senior Unsecured Notes | 2.450% senior unsecured notes, due 2019
Debt Instrument [Line Items]
Long-term borrowed funds	$ 745	744
Interest rate	2.45%
Banking and Other Subsidiaries | Senior Unsecured Notes | 2.250% senior unsecured notes, due 2020
Debt Instrument [Line Items]
Long-term borrowed funds	$ 694	691
Interest rate	2.25%
Banking and Other Subsidiaries | Senior Unsecured Notes | 3.155% floating-rate senior unsecured notes, due 2020
Debt Instrument [Line Items]
Long-term borrowed funds	$ 300	300
Interest rate	3.155%
Banking and Other Subsidiaries | Senior Unsecured Notes | 3.216% floating-rate senior unsecured notes, due 2020
Debt Instrument [Line Items]
Long-term borrowed funds	$ 250	250
Interest rate	3.216%
Banking and Other Subsidiaries | Senior Unsecured Notes | 2.200% senior unsecured notes, due 2020
Debt Instrument [Line Items]
Long-term borrowed funds	$ 499	499
Interest rate	2.20%
Banking and Other Subsidiaries | Senior Unsecured Notes | 2.250% senior unsecured notes, due 2020
Debt Instrument [Line Items]
Long-term borrowed funds	$ 742	738
Interest rate	2.25%
Banking and Other Subsidiaries | Senior Unsecured Notes | 2.550% senior unsecured notes, due 2021
Debt Instrument [Line Items]
Long-term borrowed funds	$ 973	964
Interest rate	2.55%
Banking and Other Subsidiaries | Senior Unsecured Notes | 3.250% Senior Unsecured Notes, Due 2022
Debt Instrument [Line Items]
Long-term borrowed funds	$ 702	0
Interest rate	3.25%
Banking and Other Subsidiaries | Senior Unsecured Notes | 3.413% floating-rate senior unsecured notes, due February 2022
Debt Instrument [Line Items]
Long-term borrowed funds	$ 299	0
Interest rate	3.413%
Banking and Other Subsidiaries | Senior Unsecured Notes | 3.456% floating-rate senior unsecured notes, due 2022
Debt Instrument [Line Items]
Long-term borrowed funds	$ 249	249
Interest rate	3.456%
Banking and Other Subsidiaries | Senior Unsecured Notes | 2.650% senior unsecured notes, due 2022
Debt Instrument [Line Items]
Long-term borrowed funds	$ 492	487
Interest rate	2.65%
Banking and Other Subsidiaries | Senior Unsecured Notes | 3.700% senior unsecured notes, due 2023
Debt Instrument [Line Items]
Long-term borrowed funds	$ 508	502
Interest rate	3.70%
Banking and Other Subsidiaries | Senior Unsecured Notes | 3.551% floating-rate senior unsecured notes, due 2023
Debt Instrument [Line Items]
Long-term borrowed funds	$ 249	249
Interest rate	3.551%
Banking and Other Subsidiaries | Senior Unsecured Notes | 3.750% Senior Unsecured Notes, Due 2026
Debt Instrument [Line Items]
Long-term borrowed funds	$ 506	0
Interest rate	3.75%
Banking and Other Subsidiaries | Federal Home Loan Bank advances
Debt Instrument [Line Items]
Long-term borrowed funds	$ 2,508	7,508
Weighted average rate	2.787%
Banking and Other Subsidiaries | Other
Debt Instrument [Line Items]
Long-term borrowed funds	$ 21	$ 9

BORROWED FUNDS - Narrative (Det

BORROWED FUNDS - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Hedging basis adjustments	$ 597	$ 449
Short-term borrowed funds	679	1,317
Available borrowing capacity	42,500
Federal Home Loan Bank Advances and Letters of Credit | Secured Debt
Debt Instrument [Line Items]
Short-term borrowed funds	7,700	13,000
Federal Home Loan Bank advances
Debt Instrument [Line Items]
Available borrowing capacity	8,400	4,800
Parent Company
Debt Instrument [Line Items]
Principal balance	2,000	2,000
Unamortized deferred issuance costs and/or discounts	(4)	(5)
Banking Subsidiaries
Debt Instrument [Line Items]
Principal balance	9,800	14,000
Unamortized deferred issuance costs and/or discounts	(18)	(14)
Hedging basis adjustments	$ (23)	$ (66)

BORROWED FUNDS - Maturities of

BORROWED FUNDS - Maturities of Long-term Borrowed Funds (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
2019	$ 748
2020	4,989
2021	1,327
2022	2,097
2023	759
2024 and thereafter	1,805
Total	11,725	$ 15,925
Parent Company
Debt Instrument [Line Items]
2019	0
2020	0
2021	349
2022	348
2023	0
2024 and thereafter	1,291
Total	1,988
Banking and Other Subsidiaries
Debt Instrument [Line Items]
2019	748
2020	4,989
2021	978
2022	1,749
2023	759
2024 and thereafter	514
Total	$ 9,737

DERIVATIVES - Schedule of Deriv

DERIVATIVES - Schedule of Derivative Instruments (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Derivative Assets
Derivative assets	$ 597	$ 449
Less: Gross amounts offset in the Consolidated Balance Sheets	(78)	(87)
Less: Cash collateral applied	(54)	(45)
Total net derivative fair values presented in the Consolidated Balance Sheets	465	317
Derivative Liabilities
Derivative Liabilities	294	415
Less: Gross amounts offset in the Consolidated Balance Sheets	(78)	(87)
Less: Cash collateral applied	(43)	(36)
Total net derivative fair values presented in the Consolidated Balance Sheets	173	292
Derivatives not designated as hedging instruments:
Derivative Assets
Derivative assets	597	444
Derivative Liabilities
Derivative Liabilities	279	415
Interest rate contracts
Derivative Assets
Derivative assets	443	306
Derivative Liabilities
Derivative Liabilities	160	277
Interest rate contracts | Derivatives designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional amount	14,500	12,050
Derivative Assets
Derivative assets	0	5
Derivative Liabilities
Derivative Liabilities	15	0
Interest rate contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional amount	126,525	117,076
Derivative Assets
Derivative assets	443	301
Derivative Liabilities
Derivative Liabilities	145	277
Foreign exchange contracts
Derivative Assets
Derivative assets	135	129
Derivative Liabilities
Derivative Liabilities	113	113
Foreign exchange contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional amount	11,858	9,866
Derivative Assets
Derivative assets	135	129
Derivative Liabilities
Derivative Liabilities	113	113
Other contracts
Derivative Assets
Derivative assets	19	14
Derivative Liabilities
Derivative Liabilities	21	25
Other contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional amount	5,221	3,555
Derivative Assets
Derivative assets	19	14
Derivative Liabilities
Derivative Liabilities	$ 21	$ 25

DERIVATIVES - Schedule of Fair

DERIVATIVES - Schedule of Fair Value Hedges (Details) - Interest rate swap - Interest expense - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Derivative	$ 39	$ (39)
Hedged Item	$ (39)	$ 37

DERIVATIVES - Amounts Recorded

DERIVATIVES - Amounts Recorded in Balance Sheet (Details) $ in Millions	Mar. 31, 2019USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Carrying amount of the hedged liabilities	$ 5,362
Cumulative amount of fair value hedging adjustments included in the carrying amount of the hedged items	(23)
Cumulative hedging adjustments on discontinued fair value hedge	$ (4)

DERIVATIVES - Narrative (Detail

DERIVATIVES - Narrative (Details) $ in Millions	Mar. 31, 2019USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Net loss (pre-tax) on derivatives expected to be reclassified in next 12 months	$ 12

DERIVATIVES - Effect of Derivat

DERIVATIVES - Effect of Derivative Instruments on Net Income and Stockholders' Equity (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Amount of pretax net gains (losses) recognized in OCI	$ 51	$ (70)
Interest Income
Derivative Instruments, Gain (Loss) [Line Items]
Amount of pretax net gains (losses) from OCI into income statement	(20)	(6)
Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of pretax net gains (losses) from OCI into income statement	$ 0	$ 4

DERIVATIVES - Effect of Custome

DERIVATIVES - Effect of Customer Derivatives and Economic Hedges on Net Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Amounts Recognized in Noninterest Income	$ 72	$ 5
Economic hedges | Foreign exchange and interest rate products | Customer interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amounts Recognized in Noninterest Income	229	(204)
Economic hedges | Foreign exchange and interest rate products | Customer foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amounts Recognized in Noninterest Income	(34)	11
Economic hedges | Foreign exchange and interest rate products | Derivatives transactions to hedge interest rate risk
Derivative Instruments, Gain (Loss) [Line Items]
Amounts Recognized in Noninterest Income	(217)	216
Economic hedges | Foreign exchange and interest rate products | Derivatives transactions to hedge foreign exchange risk
Derivative Instruments, Gain (Loss) [Line Items]
Amounts Recognized in Noninterest Income	40	(17)
Economic hedges | Mortgage banking fees | Residential loan commitments
Derivative Instruments, Gain (Loss) [Line Items]
Amounts Recognized in Noninterest Income	5	(1)
Economic hedges | Mortgage banking fees | Forward sale contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amounts Recognized in Noninterest Income	4	0
Economic hedges | Mortgage banking fees | Interest rate derivative contracts used to hedge residential MSRs
Derivative Instruments, Gain (Loss) [Line Items]
Amounts Recognized in Noninterest Income	$ 45	$ 0

RECLASSIFICATIONS OUT OF ACCU_3

RECLASSIFICATIONS OUT OF ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Jan. 01, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 20,817	$ 20,270
Other comprehensive loss before reclassifications	285	(324)
Other-than-temporary impairment not recognized in earnings on debt securities	0	(1)
Amounts reclassified to the Consolidated Statements of Operations	13	0
Cumulative effect of change in accounting standards			$ 17
Net other comprehensive (loss) income	303	(325)
Ending balance	21,531	20,059
Total AOCI
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(1,096)	(820)
Cumulative effect of change in accounting standards			5
Ending balance	(793)	(1,145)
Net Unrealized (Losses) Gains on Derivatives
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(143)	(143)
Other comprehensive loss before reclassifications	39	(52)
Other-than-temporary impairment not recognized in earnings on debt securities	0	0
Amounts reclassified to the Consolidated Statements of Operations	15	2
Cumulative effect of change in accounting standards			0
Net other comprehensive (loss) income	54	(50)
Ending balance	(89)	(193)
Net Unrealized (Losses) Gains on Debt Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(490)	(236)
Other comprehensive loss before reclassifications	246	(272)
Other-than-temporary impairment not recognized in earnings on debt securities	0	(1)
Amounts reclassified to the Consolidated Statements of Operations	(5)	(5)
Cumulative effect of change in accounting standards			5
Net other comprehensive (loss) income	246	(278)
Ending balance	(244)	(514)
Employee Benefit Plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(463)	(441)
Other comprehensive loss before reclassifications	0	0
Other-than-temporary impairment not recognized in earnings on debt securities	0	0
Amounts reclassified to the Consolidated Statements of Operations	3	3
Cumulative effect of change in accounting standards			$ 0
Net other comprehensive (loss) income	3	3
Ending balance	$ (460)	$ (438)

RECLASSIFICATIONS OUT OF ACCU_4

RECLASSIFICATIONS OUT OF ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Reclassifications out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest income	$ 1,570	$ 1,328
Interest expense	(410)	(237)
Securities gains, net	8	8
Net debt securities impairment losses recognized in earnings	(1)	(1)
Other operating expense	(110)	(120)
Income before income tax expense	566	501
Income tax expense	127	113
NET INCOME	439	388
Amount Reclassified from AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense	(5)	1
NET INCOME	(13)	0
Reclassification adjustment for net derivative losses included in net income: | Amount Reclassified from AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest income	(20)	(6)
Interest expense	0	4
Income before income tax expense	(20)	(2)
Income tax expense	(5)	0
NET INCOME	(15)	(2)
Reclassification of net debt securities gains to net income: | Amount Reclassified from AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Securities gains, net	8	8
Net debt securities impairment losses recognized in earnings	(1)	(1)
Income before income tax expense	7	7
Income tax expense	2	2
NET INCOME	5	5
Reclassification of changes related to the employee benefit plan: | Amount Reclassified from AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other operating expense	(5)	(4)
Income before income tax expense	(5)	(4)
Income tax expense	(2)	(1)
NET INCOME	$ (3)	$ (3)

RECLASSIFICATIONS OUT OF ACCU_5

RECLASSIFICATIONS OUT OF ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Effects to Net Income of Amounts Reclassified Out of OCI (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net interest income	$ 1,160	$ 1,091
Provision for credit losses	85	78
Noninterest income	428	371
Noninterest expense	937	883
Income before income tax expense	566	501
Income tax expense	127	113
NET INCOME	439	388
Amount Reclassified from AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net interest income	(20)	(2)
Noninterest income	7	7
Noninterest expense	5	4
Income tax expense	(5)	1
NET INCOME	$ (13)	$ 0

STOCKHOLDERS' EQUITY - Authoriz

STOCKHOLDERS' EQUITY - Authorized Preferred Shares (Details) - USD ($) $ / shares in Units, $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Preferred Stock
Preferred stock, authorized (in shares)	100,000,000	100,000,000
Preferred stock, par value (in dollars per share)	$ 25	$ 25
Preferred stock, issued (in shares)	1,150,000	850,000
Preferred stock, value, issued	$ 1,132	$ 840
Series A Preferred Stock
Preferred Stock
Preferred stock, liquidation preference per share (in dollars per share)	$ 1,000
Preferred stock, issued (in shares)	250,000	250,000
Preferred stock, outstanding (in shares)	250,000	250,000
Preferred stock, value, issued	$ 247	$ 247
Preferred stock, value, outstanding	$ 247	$ 247
Series B Preferred Stock
Preferred Stock
Preferred stock, liquidation preference per share (in dollars per share)	$ 1,000
Preferred stock, issued (in shares)	300,000	300,000
Preferred stock, outstanding (in shares)	300,000	300,000
Preferred stock, value, issued	$ 296	$ 296
Preferred stock, value, outstanding	$ 296	$ 296
Series C Preferred Stock
Preferred Stock
Preferred stock, liquidation preference per share (in dollars per share)	$ 1,000
Preferred stock, issued (in shares)	300,000	300,000
Preferred stock, outstanding (in shares)	300,000	300,000
Preferred stock, value, issued	$ 297	$ 297
Preferred stock, value, outstanding	$ 297	$ 297
Series D Preferred Stock
Preferred Stock
Preferred stock, liquidation preference per share (in dollars per share)	$ 1,000
Preferred stock, issued (in shares)	300,000	0
Preferred stock, outstanding (in shares)	300,000	0
Preferred stock, value, issued	$ 292	$ 0
Preferred stock, value, outstanding	$ 292	$ 0
Liquidation preference per depository share (usd per share)	$ 25
Depositary shares issued (in shares)	12,000,000

STOCKHOLDERS' EQUITY - Preferre

STOCKHOLDERS' EQUITY - Preferred Stock Outstanding Information (Details) - $ / shares	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Class of Stock [Line Items]
Redemption notice period	90 days
Redemption price per share (usd per share)	$ 1,000
Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock, outstanding (in shares)	250,000	250,000
Preferred stock, dividend rate	5.50%
Series B Preferred Stock
Class of Stock [Line Items]
Preferred stock, outstanding (in shares)	300,000	300,000
Preferred stock, dividend rate	6.00%
Series C Preferred Stock
Class of Stock [Line Items]
Preferred stock, outstanding (in shares)	300,000	300,000
Preferred stock, dividend rate	6.375%
Series D Preferred Stock
Class of Stock [Line Items]
Preferred stock, outstanding (in shares)	300,000	0
Preferred stock, dividend rate	6.35%
Liquidation preference per depository share (usd per share)	$ 25
Depository share interest percentage	2.50%
Depositary shares issued (in shares)	12,000,000
LIBOR | Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock, dividend payment rate, basis spread on variable rate	3.96%
LIBOR | Series B Preferred Stock
Class of Stock [Line Items]
Preferred stock, dividend payment rate, basis spread on variable rate	3.003%
LIBOR | Series C Preferred Stock
Class of Stock [Line Items]
Preferred stock, dividend payment rate, basis spread on variable rate	3.157%
LIBOR | Series D Preferred Stock
Class of Stock [Line Items]
Preferred stock, dividend payment rate, basis spread on variable rate	3.642%

STOCKHOLDERS' EQUITY - Dividend

STOCKHOLDERS' EQUITY - Dividends (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Class of Stock [Line Items]
Dividends declared per share of common stock (in usd per share)	$ 0.32	$ 0.22
Common stock dividends declared and paid	149,000,000	108,000,000
Preferred stock dividends declared and paid	15,000,000	7,000,000
Series A Preferred Stock
Class of Stock [Line Items]
Dividends declared per share of preferred stock (in usd per share)	27.50	27.50
Series B Preferred Stock
Class of Stock [Line Items]
Dividends declared per share of preferred stock (in usd per share)	0	0
Series C Preferred Stock
Class of Stock [Line Items]
Dividends declared per share of preferred stock (in usd per share)	15.94	0
Series D Preferred Stock
Class of Stock [Line Items]
Dividends declared per share of preferred stock (in usd per share)	11.82	0
Dividends Declared
Class of Stock [Line Items]
Common stock dividends declared and paid	149,000,000	108,000,000
Preferred stock dividends declared and paid	15,000,000	7,000,000
Dividends Declared | Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock dividends declared and paid	7,000,000	7,000,000
Dividends Declared | Series B Preferred Stock
Class of Stock [Line Items]
Preferred stock dividends declared and paid	0	0
Dividends Declared | Series C Preferred Stock
Class of Stock [Line Items]
Preferred stock dividends declared and paid	5,000,000	0
Dividends Declared | Series D Preferred Stock
Class of Stock [Line Items]
Preferred stock dividends declared and paid	3,000,000	0
Dividends Paid
Class of Stock [Line Items]
Common stock dividends declared and paid	149,000,000	108,000,000
Preferred stock dividends declared and paid	15,000,000	0
Dividends Paid | Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock dividends declared and paid	0	0
Dividends Paid | Series B Preferred Stock
Class of Stock [Line Items]
Preferred stock dividends declared and paid	11,000,000	0
Dividends Paid | Series C Preferred Stock
Class of Stock [Line Items]
Preferred stock dividends declared and paid	4,000,000	0
Dividends Paid | Series D Preferred Stock
Class of Stock [Line Items]
Preferred stock dividends declared and paid	$ 0	$ 0

STOCKHOLDERS' EQUITY - Treasury

STOCKHOLDERS' EQUITY - Treasury Stock (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Equity [Abstract]
Repurchase of common stock	$ 200	$ 175
Treasury stock purchased (in shares)	5,823,891

COMMITMENTS AND CONTINGENCIES -

COMMITMENTS AND CONTINGENCIES - Schedule of Outstanding Off-balance sheet Arrangements (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Other Commitments [Line Items]
Commitment amount	$ 70,739	$ 71,739
Commitments to extend credit
Other Commitments [Line Items]
Commitment amount	68,564	69,553
Letters of credit
Other Commitments [Line Items]
Commitment amount	2,089	2,125
Marketing rights
Other Commitments [Line Items]
Commitment amount	37	37
Risk participation agreements
Other Commitments [Line Items]
Commitment amount	27	19
Loans sold with recourse
Other Commitments [Line Items]
Commitment amount	$ 22	$ 5

COMMITMENTS AND CONTINGENCIES_2

COMMITMENTS AND CONTINGENCIES - Narrative (Details) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2019USD ($)counterparty	Dec. 31, 2018USD ($)	Dec. 31, 2003
Risk Participation Agreements [Abstract]
Risk participation agreements number of counterparties | counterparty	86
Risk participation agreements, Maximum term	9 years
Commercial real estate loans held for sale | Purchase commitment
Other Commitments [Abstract]
Unsettled commercial loan trade purchases	$ 166	$ 68
Unsettled commercial loan trade sales	$ 234	$ 161
Minimum
Risk Participation Agreements [Abstract]
Risk participation agreements, Average term	1 year
Maximum
Risk Participation Agreements [Abstract]
Risk participation agreements, Average term	5 years
Marketing rights
Marketing Rights [Abstract]
Commitment period			25 years
Financial standby letters of credit
Letters of Credit [Abstract]
Letters of credit outstanding	10 years
Commercial letters of credit
Letters of Credit [Abstract]
Letters of credit outstanding	1 year
Purchase Of Education Loans
Other Commitments [Abstract]
Other Commitment, Remaining Maximum Amount Committed	$ 799
Purchase Of Education Loans | Minimum
Other Commitments [Abstract]
Commitment amount	600
Purchase Of Education Loans | Maximum
Other Commitments [Abstract]
Commitment amount	$ 1,000

FAIR VALUE MEASUREMENTS - Narra

FAIR VALUE MEASUREMENTS - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other income	$ 26	$ 18
Commercial real estate loans held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans in this portfolio that were 90 days or more past due or nonaccruing	0		$ 0
Other income	3	1
Mortgage banking fees | Residential loans held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Changes in fair value	$ (1)	$ (3)

FAIR VALUE MEASUREMENTS - Resid

FAIR VALUE MEASUREMENTS - Residential Mortgage and Commercial Real Estate Loans Held For Sale (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Aggregate Fair Value	$ 1,186	$ 1,219
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Aggregate Fair Value	1,186	1,219
Level 2 | Residential loans held for sale
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Aggregate Fair Value	1,009	967
Aggregate Unpaid Principal	1,009	967
Aggregate Fair Value Less Aggregate Unpaid Principal	0	0
Level 2 | Commercial and commercial real estate loans held for sale, at fair value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Aggregate Fair Value	177	252
Aggregate Unpaid Principal	177	252
Aggregate Fair Value Less Aggregate Unpaid Principal	$ 0	$ 0

FAIR VALUE MEASUREMENTS - Sched

FAIR VALUE MEASUREMENTS - Schedule of Fair Value Measurements (Details) - USD ($) $ in Millions		Mar. 31, 2019	Dec. 31, 2018
Assets
Securities available for sale	[1]	$ 21,504	$ 19,895
Loans held for sale, at fair value		1,186	1,219
Mortgage servicing rights		563	600
Derivative assets		597	449
Equity securities, at fair value		198	181
Total assets		24,048	22,344
Liabilities
Total derivative liabilities		294	415
Total liabilities		294	415
Interest rate contracts
Assets
Derivative assets		443	306
Liabilities
Total derivative liabilities		160	277
Foreign exchange contracts
Assets
Derivative assets		135	129
Liabilities
Total derivative liabilities		113	113
Other contracts
Assets
Derivative assets		19	14
Liabilities
Total derivative liabilities		21	25
Level 1
Assets
Securities available for sale		72	24
Loans held for sale, at fair value		0	0
Derivative assets		0	0
Equity securities, at fair value		198	181
Total assets		270	205
Liabilities
Total derivative liabilities		0	0
Total liabilities		0	0
Level 1 | Interest rate contracts
Assets
Derivative assets		0	0
Liabilities
Total derivative liabilities		0	0
Level 1 | Foreign exchange contracts
Assets
Derivative assets		0	0
Liabilities
Total derivative liabilities		0	0
Level 1 | Other contracts
Assets
Derivative assets		0	0
Liabilities
Total derivative liabilities		0	0
Level 2
Assets
Securities available for sale		21,432	19,871
Loans held for sale, at fair value		1,186	1,219
Derivative assets		579	449
Equity securities, at fair value		0	0
Total assets		23,197	21,539
Liabilities
Total derivative liabilities		294	415
Total liabilities		294	415
Level 2 | Interest rate contracts
Assets
Derivative assets		443	306
Liabilities
Total derivative liabilities		160	277
Level 2 | Foreign exchange contracts
Assets
Derivative assets		135	129
Liabilities
Total derivative liabilities		113	113
Level 2 | Other contracts
Assets
Derivative assets		1	14
Liabilities
Total derivative liabilities		21	25
Level 3
Assets
Securities available for sale		0	0
Loans held for sale, at fair value		0	0
Derivative assets		18	0
Equity securities, at fair value		0	0
Total assets		581	600
Liabilities
Total derivative liabilities		0	0
Total liabilities		0	0
Level 3 | Interest rate contracts
Assets
Derivative assets		0	0
Liabilities
Total derivative liabilities		0	0
Level 3 | Foreign exchange contracts
Assets
Derivative assets		0	0
Liabilities
Total derivative liabilities		0	0
Level 3 | Other contracts
Assets
Derivative assets		18	0
Liabilities
Total derivative liabilities		0	0
Mortgage-backed securities
Assets
Securities available for sale		21,427	19,866
Mortgage-backed securities | Level 1
Assets
Securities available for sale		0	0
Mortgage-backed securities | Level 2
Assets
Securities available for sale		21,427	19,866
Mortgage-backed securities | Level 3
Assets
Securities available for sale		0	0
State and political subdivisions
Assets
Securities available for sale		5	5
State and political subdivisions | Level 1
Assets
Securities available for sale		0	0
State and political subdivisions | Level 2
Assets
Securities available for sale		5	5
State and political subdivisions | Level 3
Assets
Securities available for sale		0	0
U.S. Treasury and other
Assets
Securities available for sale		72	24
U.S. Treasury and other | Level 1
Assets
Securities available for sale		72	24
U.S. Treasury and other | Level 2
Assets
Securities available for sale		0	0
U.S. Treasury and other | Level 3
Assets
Securities available for sale		0	0
Residential loans held for sale
Assets
Loans held for sale, at fair value		1,009	967
Residential loans held for sale | Level 1
Assets
Loans held for sale, at fair value		0	0
Residential loans held for sale | Level 2
Assets
Loans held for sale, at fair value		1,009	967
Residential loans held for sale | Level 3
Assets
Loans held for sale, at fair value		0	0
Commercial loans held for sale
Assets
Loans held for sale, at fair value		177	252
Commercial loans held for sale | Level 1
Assets
Loans held for sale, at fair value		0	0
Commercial loans held for sale | Level 2
Assets
Loans held for sale, at fair value		177	252
Commercial loans held for sale | Level 3
Assets
Loans held for sale, at fair value		0	0
Residential mortgages
Assets
Mortgage servicing rights		563	600
Residential mortgages | Level 1
Assets
Mortgage servicing rights		0	0
Residential mortgages | Level 2
Assets
Mortgage servicing rights		0	0
Residential mortgages | Level 3
Assets
Mortgage servicing rights		563	600
Money market mutual fund investments
Assets
Equity securities, at fair value		198	181
Money market mutual fund investments | Level 1
Assets
Equity securities, at fair value		198	181
Money market mutual fund investments | Level 2
Assets
Equity securities, at fair value		0	0
Money market mutual fund investments | Level 3
Assets
Equity securities, at fair value		$ 0	$ 0
[1]	Includes only collateral pledged by the Company where counterparties have the right to sell or pledge the collateral.

FAIR VALUE MEASUREMENTS - Sch_2

FAIR VALUE MEASUREMENTS - Schedule of Assets Measured on Recurring Basis Level 3 Rollforward (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)
Residential mortgages
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 600
Amount capitalized	35
Change in unpaid principal balance during the period	(26)
Change in fair value during the period	(46)
Transfers from Level 2 to Level 3	0
Ending balance	563
Other Derivative Contracts
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	0
Amount capitalized	0
Change in unpaid principal balance during the period	0
Change in fair value during the period	0
Transfers from Level 2 to Level 3	18
Ending balance	$ 18

FAIR VALUE MEASUREMENTS - Sch_3

FAIR VALUE MEASUREMENTS - Schedule of Gain (Loss) on Assets and Liabilities Measured on Nonrecurring Basis Included in Earnings (Details) - Nonrecurring measurement basis - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Impaired collateral-dependent loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (loss) included in earnings on assets measured on a nonrecurring basis	$ (4)	$ (2)
MSRs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (loss) included in earnings on assets measured on a nonrecurring basis	0	3
Foreclosed assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (loss) included in earnings on assets measured on a nonrecurring basis	0	(1)
Leased assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (loss) included in earnings on assets measured on a nonrecurring basis	$ (3)	$ 0

FAIR VALUE MEASUREMENTS - Sch_4

FAIR VALUE MEASUREMENTS - Schedule of Fair Value Measurements on a Nonrecurring Basis (Details) - Nonrecurring measurement basis - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired collateral-dependent loans	$ 371	$ 338
MSRs	224	243
Foreclosed assets	29	29
Leased assets	91	92
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired collateral-dependent loans	0	0
MSRs	0	0
Foreclosed assets	0	0
Leased assets	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired collateral-dependent loans	371	338
MSRs	0	0
Foreclosed assets	29	29
Leased assets	91	92
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired collateral-dependent loans	0	0
MSRs	224	243
Foreclosed assets	0	0
Leased assets	$ 0	$ 0

FAIR VALUE MEASUREMENTS - Sch_5

FAIR VALUE MEASUREMENTS - Schedule of Financial Instruments not Recorded at Fair Value (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities held to maturity, carrying value	$ 3,345	$ 4,165
Securities held-to-maturity, fair value	3,267	4,041
Equity securities, at cost, carrying value	604	834
Equity securities, at cost, fair value	604	834
Other loans held for sale, carrying value	66	101
Other loans held for sale, fair value	66	101
Loans and leases, carrying value	117,615	116,660
Loans and leases, fair value	117,862	116,627
Deposits, carrying value	123,916	119,575
Deposits, fair value	123,875	119,503
Federal funds purchased and securities sold under agreements to repurchase, carrying value	668	1,156
Federal funds purchased and securities sold under agreements to repurchase, fair value	668	1,156
Other short-term borrowed funds, carrying value	11	161
Other short-term borrowed funds, fair value	11	161
Long-term borrowed funds, carrying value	11,725	15,925
Long-term borrowed funds, fair value	11,767	15,877
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities held to maturity, carrying value	0	0
Securities held-to-maturity, fair value	0	0
Equity securities, at cost, carrying value	0	0
Equity securities, at cost, fair value	0	0
Other loans held for sale, carrying value	0	0
Other loans held for sale, fair value	0	0
Loans and leases, carrying value	0	0
Loans and leases, fair value	0	0
Deposits, carrying value	0	0
Deposits, fair value	0	0
Federal funds purchased and securities sold under agreements to repurchase, carrying value	0	0
Federal funds purchased and securities sold under agreements to repurchase, fair value	0	0
Other short-term borrowed funds, carrying value	0	0
Other short-term borrowed funds, fair value	0	0
Long-term borrowed funds, carrying value	0	0
Long-term borrowed funds, fair value	0	0
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities held to maturity, carrying value	3,345	4,165
Securities held-to-maturity, fair value	3,267	4,041
Equity securities, at cost, carrying value	604	834
Equity securities, at cost, fair value	604	834
Other loans held for sale, carrying value	0	0
Other loans held for sale, fair value	0	0
Loans and leases, carrying value	371	338
Loans and leases, fair value	371	338
Deposits, carrying value	123,916	119,575
Deposits, fair value	123,875	119,503
Federal funds purchased and securities sold under agreements to repurchase, carrying value	668	1,156
Federal funds purchased and securities sold under agreements to repurchase, fair value	668	1,156
Other short-term borrowed funds, carrying value	11	161
Other short-term borrowed funds, fair value	11	161
Long-term borrowed funds, carrying value	11,725	15,925
Long-term borrowed funds, fair value	11,767	15,877
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities held to maturity, carrying value	0	0
Securities held-to-maturity, fair value	0	0
Equity securities, at cost, carrying value	0	0
Equity securities, at cost, fair value	0	0
Other loans held for sale, carrying value	66	101
Other loans held for sale, fair value	66	101
Loans and leases, carrying value	117,244	116,322
Loans and leases, fair value	117,491	116,289
Deposits, carrying value	0	0
Deposits, fair value	0	0
Federal funds purchased and securities sold under agreements to repurchase, carrying value	0	0
Federal funds purchased and securities sold under agreements to repurchase, fair value	0	0
Other short-term borrowed funds, carrying value	0	0
Other short-term borrowed funds, fair value	0	0
Long-term borrowed funds, carrying value	0	0
Long-term borrowed funds, fair value	$ 0	$ 0

NONINTEREST INCOME - Narrative

NONINTEREST INCOME - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Trust and investment services fees
Disaggregation of Revenue [Line Items]
Trailing commission income	$ 4	$ 4

NONINTEREST INCOME - Components

NONINTEREST INCOME - Components of Revenue from Contracts with Customers (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 280	$ 265
Consumer Banking
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	194	190
Commercial Banking
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	86	75
Service charges and fees
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	123	124
Service charges and fees | Consumer Banking
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	97	98
Service charges and fees | Commercial Banking
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	26	26
Card fees
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	59	61
Card fees | Consumer Banking
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	50	52
Card fees | Commercial Banking
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	9	9
Capital markets fees
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	49	37
Capital markets fees | Consumer Banking
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Capital markets fees | Commercial Banking
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	49	37
Trust and investment services fees
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	47	40
Trust and investment services fees | Consumer Banking
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	47	40
Trust and investment services fees | Commercial Banking
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Other banking fees
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2	3
Other banking fees | Consumer Banking
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Other banking fees | Commercial Banking
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 2	$ 3

NONINTEREST INCOME - Other Inco

NONINTEREST INCOME - Other Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Other Income and Expenses [Abstract]
Bank-owned life insurance	$ 14	$ 14

OTHER OPERATING EXPENSE (Detail

OTHER OPERATING EXPENSE (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Other Income and Expenses [Abstract]
Deposit insurance	$ 16	$ 31
Promotional expense	27	25
Settlements and operating losses	11	12
Other	56	52
Other operating expense	$ 110	$ 120

EARNINGS PER SHARE (Details)

EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Numerator (basic and diluted):
Net income	$ 439	$ 388
Less: Preferred stock dividends	15	7
Net income available to common stockholders	$ 424	$ 381
Denominator:
Weighted-average common shares outstanding - basic (in shares)	460,713,172	487,500,618
Dilutive common shares: share-based awards (in shares)	1,807,508	1,766,208
Weighted-average common shares outstanding - diluted (in shares)	462,520,680	489,266,826
Earnings per common share:
Basic (in dollars per share)	$ 0.92	$ 0.78
Diluted (in dollars per share)	$ 0.92	$ 0.78
Share-based awards excluded from diluted earnings per share computation (in shares)	1,000,000	0

BUSINESS OPERATING SEGMENTS - N

BUSINESS OPERATING SEGMENTS - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)segment
Segment Reporting Information [Line Items]
Number of segments | segment	2
Consumer Banking | Maximum
Segment Reporting Information [Line Items]
Customer revenue targets	$ 25
Commercial Banking | Minimum
Segment Reporting Information [Line Items]
Customer revenue targets	25
Commercial Banking | Maximum
Segment Reporting Information [Line Items]
Customer revenue targets	$ 3,000

BUSINESS OPERATING SEGMENTS (De

BUSINESS OPERATING SEGMENTS (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Net interest income	$ 1,160	$ 1,091
Noninterest income	428	371
Total revenue	1,588	1,462
Noninterest expense	937	883
Profit before provision for credit losses	651	579
Provision for credit losses	85	78
Income before income tax expense	566	501
Income tax expense (benefit)	127	113
NET INCOME	439	388
Total average assets	160,415	151,523
Operating Segments | Consumer Banking
Segment Reporting Information [Line Items]
Net interest income	788	733
Noninterest income	247	222
Total revenue	1,035	955
Noninterest expense	700	656
Profit before provision for credit losses	335	299
Provision for credit losses	67	72
Income before income tax expense	268	227
Income tax expense (benefit)	66	57
NET INCOME	202	170
Total average assets	65,007	61,348
Operating Segments | Commercial Banking
Segment Reporting Information [Line Items]
Net interest income	372	357
Noninterest income	150	125
Total revenue	522	482
Noninterest expense	209	208
Profit before provision for credit losses	313	274
Provision for credit losses	21	(4)
Income before income tax expense	292	278
Income tax expense (benefit)	65	63
NET INCOME	227	215
Total average assets	55,630	50,393
Other
Segment Reporting Information [Line Items]
Net interest income	0	1
Noninterest income	31	24
Total revenue	31	25
Noninterest expense	28	19
Profit before provision for credit losses	3	6
Provision for credit losses	(3)	10
Income before income tax expense	6	(4)
Income tax expense (benefit)	(4)	(7)
NET INCOME	10	3
Total average assets	$ 39,778	$ 39,782