F.N.B. (FNB) 10-Q 5 May 22 2022 Q1 Quarterly report Financial data

Cover Page

Cover Page - shares	3 Months Ended
	Mar. 31, 2022	Apr. 30, 2022
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2022
Document Transition Report	false
Entity File Number	001-31940
Entity Registrant Name	FNB CORP/PA/
Entity Incorporation, State or Country Code	PA
Entity Tax Identification Number	25-1255406
Entity Address, Address Line One	One North Shore Center,
Entity Address, Address Line Two	12 Federal Street,
Entity Address, City or Town	Pittsburgh,
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	15212
City Area Code	800
Local Phone Number	555-5455
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		351,470,171
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q1
Entity Central Index Key	0000037808
Current Fiscal Year End Date	--12-31
New York Stock Exchange | Common Stock, par value $0.01 per share
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	FNB
Security Exchange Name	NYSE
New York Stock Exchange | Depositary Shares each representing 1/40th interest in a share of Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series E
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shares each representing 1/40th interest in a share of Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series E
Trading Symbol	FNBPrE
Security Exchange Name	NYSE

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions		Mar. 31, 2022	Dec. 31, 2021
Assets
Cash and due from banks		$ 436	$ 337
Interest-bearing deposits with banks		3,421	3,156
Cash and Cash Equivalents		3,857	3,493
Debt securities available for sale (amortized cost of $3,600 and $3,416; allowance for credit losses of $0 and $0)		3,446	3,426
Debt securities held to maturity (fair value of $3,364 and $3,506; allowance for credit losses of $0 and $0)		3,513	3,463
Loans held for sale (includes $214 and $269 measured at fair value)	[1]	253	295
Loans and leases, net of unearned income of $36 and $36		26,839	24,968
Allowance for credit losses on loans and leases		(371)	(344)
Net Loans and Leases		26,468	24,624
Premises and equipment, net		394	345
Goodwill		2,434	2,262
Core deposit and other intangible assets, net		59	42
Bank owned life insurance		627	546
Other assets		971	1,017
Total Assets		42,022	39,513
Liabilities
Non-interest-bearing demand		11,729	10,789
Interest-bearing demand		15,256	14,409
Savings		3,970	3,669
Certificates and other time deposits		2,949	2,859
Total Deposits		33,904	31,726
Short-term borrowings		1,425	1,536
Long-term borrowings		713	682
Other liabilities		541	419
Total Liabilities		36,583	34,363
Stockholders’ Equity
Preferred stock - $0.01 par value; liquidation preference of $1,000 per share Authorized - 20,000,000 shares Issued - 110,877 shares		107	107
Common stock - $0.01 par value Authorized - 500,000,000 shares Issued – 363,773,858 and 329,464,669 shares		4	3
Additional paid-in capital		4,560	4,109
Retained earnings		1,118	1,110
Accumulated other comprehensive loss		(202)	(62)
Treasury stock – 12,862,828 and 10,531,177 shares at cost		(148)	(117)
Total Stockholders’ Equity		5,439	5,150
Total Liabilities and Stockholders’ Equity		$ 42,022	$ 39,513
[1]	Amount represents loans for which we have elected the fair value option. See Note 19.

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)		Mar. 31, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Debt securities available for sale, amortized cost		$ 3,600,000,000	$ 3,416,000,000
Debt securities available for sale, allowance for credit losses		0	0
Debt securities held-to-maturity, fair value		3,364,000,000	3,506,000,000
Debt securities held to maturity, allowance for credit losses		120,000	50,000
Loans held for sale, fair value	[1]	214,000,000	269,000,000
Loans and leases, unearned income		$ 36,000,000	$ 36,000,000
Preferred stock, par value (in dollars per share)		$ 0.01	$ 0.01
Preferred stock, liquidation preference per share (in dollars per share)		$ 1,000	$ 1,000
Preferred stock, shares authorized (in shares)		20,000,000	20,000,000
Preferred stock, shares issued (in shares)		110,877	110,877
Common stock, par value (in dollars per share)		$ 0.01	$ 0.01
Common stock, shares authorized (in shares)		500,000,000	500,000,000
Common stock, shares issued (in shares)		363,773,858	329,464,669
Treasury stock, shares (in shares)		12,862,828	10,531,177
[1]	Amount represents loans for which we have elected the fair value option. See Note 19.

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Interest Income
Loans and leases, including fees	$ 221	$ 221
Securities:
Taxable	24	22
Tax-exempt	7	8
Other	2	0
Total Interest Income	254	251
Interest Expense
Deposits	8	15
Short-term borrowings	6	7
Long-term borrowings	6	6
Total Interest Expense	20	28
Net Interest Income	234	223
Provision for credit losses	18	6
Net Interest Income After Provision for Credit Losses	216	217
Non-Interest Income
Service charges	31	28
Trust services	10	9
Insurance commissions and fees	8	7
Securities commissions and fees	6	6
Capital markets income	7	8
Mortgage banking operations	7	16
Dividends on non-marketable equity securities	2	2
Bank owned life insurance	3	3
Other	4	4
Total Non-Interest Income	78	83
Non-Interest Expense
Salaries and employee benefits	112	107
Net occupancy	18	16
Equipment	18	17
Amortization of intangibles	3	3
Outside services	17	17
Marketing	3	3
FDIC insurance	5	5
Bank shares and franchise taxes	4	4
Merger-related	29	0
Other	18	13
Total Non-Interest Expense	227	185
Income Before Income Taxes	67	115
Income taxes	14	22
Net Income	53	93
Preferred stock dividends	2	2
Net income available to common stockholders	51	91
Net income available to common stockholders	$ 51	$ 91
Earnings per Common Share
Basic (in dollars per share)	$ 0.15	$ 0.28
Diluted (in dollars per share)	$ 0.15	$ 0.28

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 53	$ 93
Securities available for sale:
Unrealized gains (losses) arising during the period, net of tax expense (benefit) of $(36) and $(6)	(128)	(21)
Derivative instruments:
Unrealized gains (losses) arising during the period, net of tax expense (benefit) of $(4) and $1	(15)	4
Reclassification adjustment for gains included in net income, net of tax expense of $0 and $1	2	4
Pension and postretirement benefit obligations:
Unrealized gains arising during the period, net of tax expense of $0 and $0	1	1
Other Comprehensive Income (Loss)	(140)	(12)
Comprehensive Income (Loss)	$ (87)	$ 81

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Unrealized gains (losses) arising during the period, tax expense (benefit)	$ (36)	$ (6)
Unrealized gains (losses) arising during the period, tax expense (benefit)	(4)	1
Reclassification adjustment for gains included in net income, tax of expense	0	1
Unrealized gains arising during the period, tax expense	$ 0	$ 0

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) $ in Millions	Total	Preferred Stock	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Balance at beginning of period at Dec. 31, 2020	$ 4,959	$ 107	$ 3	$ 4,087	$ 869	$ (39)	$ (68)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	81				93	(12)
Dividends declared:
Preferred stock	(2)				(2)
Common stock	(39)				(39)
Issuance of common stock	0			1			(1)
Repurchase of common stock	(36)						(36)
Restricted stock compensation	11			11
Balance at end of period at Mar. 31, 2021	4,974	107	3	4,099	921	(51)	(105)
Balance at beginning of period at Dec. 31, 2021	5,150	107	3	4,109	1,110	(62)	(117)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	(87)				53	(140)
Dividends declared:
Preferred stock	(2)				(2)
Common stock	(43)				(43)
Issuance of common stock	0			1			(1)
Issuance of common stock - acquisitions	443		1	442
Repurchase of common stock	(30)						(30)
Restricted stock compensation	8			8
Balance at end of period at Mar. 31, 2022	$ 5,439	$ 107	$ 4	$ 4,560	$ 1,118	$ (202)	$ (148)

CONSOLIDATED STATEMENTS OF ST_2

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Stockholders' Equity [Abstract]
Preferred stock dividends per share (in dollars per share)	$ 18.13	$ 18.13
Common stock dividends per share (in dollars per share)	$ 0.12	$ 0.12

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating Activities
Net income	$ 53	$ 93
Adjustments to reconcile net income to net cash flows provided by (used in) operating activities:
Depreciation, amortization and accretion	15	1
Provision for credit losses	18	6
Deferred tax expense (benefit)	5	(1)
Loans originated for sale	(354)	(566)
Loans sold	410	550
Net gain on sale of loans	(15)	(16)
Net change in:
Interest receivable	2	1
Interest payable	(2)	(4)
Bank owned life insurance, excluding purchases	(1)	0
Other, net	227	151
Net cash flows provided by operating activities	358	215
Investing Activities
Net change in loans and leases, excluding sales and transfers	(74)	(59)
Debt securities available for sale:
Purchases	(398)	(567)
Sales	287	0
Maturities/payments	244	835
Debt securities held to maturity:
Purchases	(243)	(365)
Maturities/payments	190	188
Increase in premises and equipment	(27)	(8)
Net cash received in business acquisition	75	0
Net cash flows provided by investing activities	54	24
Financing Activities
Demand (non-interest bearing and interest bearing) and savings accounts	478	1,510
Time deposits	(131)	(278)
Short-term borrowings	(125)	(117)
Proceeds from issuance of long-term borrowings	3	4
Repayment of long-term borrowings	(206)	(7)
Repurchases of common stock	(30)	(36)
Cash dividends paid:
Preferred stock	(2)	(2)
Common stock	(43)	(39)
Other, net	8	11
Net cash flows (used in) provided by financing activities	(48)	1,046
Net Increase in Cash and Cash Equivalents	364	1,285
Cash and cash equivalents at beginning of period	3,493	1,383
Cash and Cash Equivalents at End of Period	$ 3,857	$ 2,668

NATURE OF OPERATIONS

NATURE OF OPERATIONS	3 Months Ended
	Mar. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
NATURE OF OPERATIONS	NATURE OF OPERATIONS F.N.B. Corporation, headquartered in Pittsburgh, Pennsylvania, is a diversified financial services company operating in seven states and the District of Columbia. Our market coverage spans several major metropolitan areas including: Pittsburgh, Pennsylvania; Baltimore, Maryland; Cleveland, Ohio; Washington, D.C.; Charlotte, Raleigh, Durham and the Piedmont Triad (Winston-Salem, Greensboro and High Point) in North Carolina; and Charleston, South Carolina. As of March 31, 2022, we had 341 banking offices throughout Pennsylvania, Ohio, Maryland, West Virginia, North Carolina, South Carolina, Washington D.C. and Virginia. We provide a full range of commercial banking, consumer banking and wealth management solutions through our subsidiary network which is led by our largest affiliate, FNBPA, founded in 1864. Commercial banking solutions include corporate banking, small business banking, investment real estate financing, government banking, business credit, capital markets and lease financing. Consumer banking provides a full line of consumer banking products and services, including deposit products, mortgage lending, consumer lending and a complete suite of mobile and online banking services. Wealth management services include asset management, private banking and insurance.

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	3 Months Ended
	Mar. 31, 2022
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation Our accompanying Consolidated Financial Statements and these Notes to Consolidated Financial Statements (unaudited) include subsidiaries in which we have a controlling financial interest. We own and operate FNBPA, First National Trust Company, First National Investment Services Company, LLC, F.N.B. Investment Advisors, Inc., First National Insurance Agency, LLC, Bank Capital Services, LLC, F.N.B. Capital Corporation, LLC and Waubank Securities, LLC, and include results for each of these entities in the accompanying Consolidated Financial Statements. Companies in which we hold a controlling financial interest, or are a VIE in which we have the power to direct the activities of an entity that most significantly impact the entity’s economic performance and have an obligation to absorb losses or the right to receive benefits which could potentially be significant to the VIE, are consolidated. For a voting interest entity, a controlling financial interest is generally where we hold more than 50% of the outstanding voting shares. VIEs in which we do not hold the power to direct the activities of the entity that most significantly impact the entity’s economic performance or an obligation to absorb losses or the right to receive benefits which could potentially be significant to the VIE are not consolidated. Investments in companies that are not consolidated are accounted for using the equity method when we have the ability to exert significant influence or the cost method when we do not have the ability to exert significant influence. Investments in private investment partnerships that are accounted for under the equity method or the cost method are included in other assets and our proportional interest in the equity investments’ earnings are included in other non-interest income. Investment interests accounted for under the cost and equity methods are periodically evaluated for impairment. The accompanying interim unaudited Consolidated Financial Statements include all adjustments that are necessary, in the opinion of management, to fairly reflect our financial position and results of operations in accordance with GAAP. All significant intercompany balances and transactions have been eliminated. Certain prior period amounts have been reclassified to the current period presentation. Such reclassifications had no impact on our net income and stockholders' equity. Events occurring subsequent to March 31, 2022 have been evaluated for potential recognition or disclosure in the Consolidated Financial Statements through the date of the filing of the Consolidated Financial Statements with the SEC. Certain information and Note disclosures normally included in Consolidated Financial Statements prepared in accordance with GAAP have been condensed or omitted pursuant to the rules and regulations of the SEC. The interim operating results are not necessarily indicative of operating results FNB expects for the full year. These interim unaudited Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and Notes thereto included in our 2021 Annual Report on Form 10-K filed with the SEC on February 24, 2022. Use of Estimates Our accounting and reporting policies conform with GAAP. The preparation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the amounts reported in the Consolidated Financial Statements and accompanying Notes to Consolidated Financial Statements (unaudited). Actual results could materially differ from those estimates. Material estimates that are particularly susceptible to significant changes include the ACL, fair value of financial instruments, goodwill and other intangible assets, income taxes and deferred tax assets and litigation reserves, which are listed in the critical accounting estimates. For a detailed description of our significant accounting policies and critical accounting estimates, see Note 1, "Summary of Significant Accounting Policies" and the "Application of Critical Accounting Policies" section in the MD&A, both in our 202 1 Annual Report on Form 10-K .

NEW ACCOUNTING STANDARDS

NEW ACCOUNTING STANDARDS	3 Months Ended
	Mar. 31, 2022
Accounting Changes and Error Corrections [Abstract]
NEW ACCOUNTING STANDARDS	NEW ACCOUNTING STANDARDS The following table summarizes accounting pronouncements issued by the FASB that we recently adopted or will be adopting in the future. TABLE 2.1 Standard Description Financial Statements Impact Troubled Debt Restructuring and Charge-offs ASU 2022-02, Financial Instruments – Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures This Update eliminates the recognition and measurement guidance on TDRs for creditors that have adopted ASC 326 and requires enhanced disclosures about loan modifications for borrowers experiencing financial difficulty. This Update also requires public business entities to present current-period gross write-offs by year of origination in their vintage disclosures. This Update is to be applied using a prospective method. For the transition method related to TDRs, an entity has the option to apply a modified retrospective transition method. Early adoption of this Update is permitted. An entity is allowed to early adopt the amendments about TDRs and related disclosure enhancements separately from the amendments related to vintage disclosures. We are currently assessing the potential impact to our consolidated financial statements.

MERGERS AND ACQUISITIONS

MERGERS AND ACQUISITIONS	3 Months Ended
	Mar. 31, 2022
Business Combination and Asset Acquisition [Abstract]
MERGERS AND ACQUISITIONS	MERGERS AND ACQUISITIONS Howard Bancorp, Inc. On January 22, 2022, we completed our acquisition of Howard, a bank holding company headquartered in Baltimore City, Maryland. The acquisition enhances our presence in the Mid-Atlantic Region. Additionally, cost savings, efficiencies and other benefits are expected from the combined operations. On the acquisition date, Howard had assets with a net book value of approximately $2.4 billion, including $1.8 billion in both loans and deposits. The acquisition was valued at approximately $443 million and resulted in the issuance of 34,074,495 shares of our common stock in exchange for 18,930,329 shares of Howard common stock. We also acquired restricted stock units and the fully vested outstanding stock options of Howard. The merger was accounted for in accordance with the acquisition method of accounting. Preliminary fair values for all assets and liabilities are presented below. Determining the fair value of assets and liabilities is a complex process involving significant judgment regarding estimates and assumptions used to calculate fair values. Accordingly, the initial accounting for the merger is not complete. TABLE 3.1 (in millions) Howard Fair value of consideration paid $ 443 Fair value of identifiable assets acquired: Cash and cash equivalents 75 Securities 321 Loans 1,780 Core deposit and other intangible assets 19 Fixed and other assets 167 Total identifiable assets acquired 2,362 Fair value of liabilities assumed: Deposits 1,831 Borrowings 247 Other liabilities 13 Total liabilities assumed 2,091 Fair value of net identifiable assets acquired 271 Goodwill recognized $ 172 Goodwill related to the transaction was recorded in the Community Banking business segment and is not deductible for income tax purposes as the acquisition was accounted for as a tax-free exchange for tax purposes. We incurred merger expenses of $28.6 million related to the Howard acquisition for the first three months of 2022. We continue to analyze the valuations assigned to the acquired assets and assumed liabilities. Due to the complexity in valuing the loans and the significant amount of data inputs required, the valuation of the loans is not yet final. In addition, we are reviewing third-party valuations on acquired premises and core deposit intangibles. We are also assessing the valuation on deferred taxes, deposits and debt. Purchased loans and leases that reflect a more-than-insignificant deterioration of credit from origination are considered PCD. We consider various factors in connection with the identification of more-than-insignificant deterioration in credit, including but not limited to nonperforming status, delinquency, risk ratings, TDR classification, Fair Isaac Corporation (FICO) scores and other qualitative factors that indicate deterioration in credit quality since origination. For PCD loans and leases, the initial estimate of expected credit losses is recognized in the ACL on the date of acquisition using the same methodology as other loans and leases held-for-investment. As part of the Howard acquisition, we acquired PCD loans and leases of $186.9 million. We established an ACL at acquisition of $10.0 million with a corresponding gross-up to the amortized cost of the PCD loans and leases. The non-credit discount on the PCD loans and leases was $5.4 million and the Day 1 fair value was $171.5 million.

SECURITIES

SECURITIES	3 Months Ended
	Mar. 31, 2022
Investments, Debt and Equity Securities [Abstract]
SECURITIES	SECURITIES The amortized cost and fair value of AFS debt securities are presented in the table below. There was no ACL in the AFS portfolio at March 31, 2022 and December 31, 2021. Accrued interest receivable on AFS debt securities totaled $6.9 million and $7.3 million at March 31, 2022 and December 31, 2021, respectively, and is excluded from the estimate of credit losses and assessed separately in other assets in the Consolidated Balance Sheets. Accordingly, we have excluded accrued interest receivable from both the fair value and the amortized cost basis of AFS debt securities. TABLE 4.1 (in millions) Amortized Gross Gross Fair Debt Securities AFS: March 31, 2022 U.S. Treasury $ 205 $ — $ (11) $ 194 U.S. government agencies 140 1 — 141 U.S. government-sponsored entities 214 — (10) 204 Residential mortgage-backed securities: Agency mortgage-backed securities 1,440 1 (54) 1,387 Agency collateralized mortgage obligations 1,236 — (67) 1,169 Commercial mortgage-backed securities 320 — (12) 308 States of the U.S. and political subdivisions (municipals) 33 — (2) 31 Other debt securities 12 — — 12 Total debt securities AFS $ 3,600 $ 2 $ (156) $ 3,446 (in millions) Amortized Gross Gross Fair Debt Securities AFS: December 31, 2021 U.S. Treasury $ 205 $ — $ (1) $ 204 U.S. government agencies 154 1 — 155 U.S. government-sponsored entities 194 — (2) 192 Residential mortgage-backed securities: Agency mortgage-backed securities 1,342 19 (4) 1,357 Agency collateralized mortgage obligations 1,192 11 (17) 1,186 Commercial mortgage-backed securities 294 5 (2) 297 States of the U.S. and political subdivisions (municipals) 33 — — 33 Other debt securities 2 — — 2 Total debt securities AFS $ 3,416 $ 36 $ (26) $ 3,426 The amortized cost and fair value of HTM debt securities are presented in the table below. The ACL for the HTM municipal bond portfolio was $0.12 million and $0.05 million at March 31, 2022 and December 31, 2021, respectively. Accrued interest receivable on HTM debt securities totaled $11.1 million and $12.3 million at March 31, 2022 and December 31, 2021, respectively, and is excluded from the estimate of credit losses and assessed separately in other assets in the Consolidated Balance Sheets. Accordingly, we have excluded accrued interest receivable from both the fair value and the amortized cost basis of HTM debt securities. TABLE 4.2 (in millions) Amortized Gross Gross Fair Debt Securities HTM: March 31, 2022 U.S. Treasury $ 1 $ — $ — $ 1 U.S. government agencies 1 — — 1 Residential mortgage-backed securities: Agency mortgage-backed securities 1,261 1 (53) 1,209 Agency collateralized mortgage obligations 943 — (55) 888 Commercial mortgage-backed securities 328 — (16) 312 States of the U.S. and political subdivisions (municipals) 974 4 (30) 948 Other debt securities 5 — — 5 Total debt securities HTM $ 3,513 $ 5 $ (154) $ 3,364 (in millions) Amortized Gross Gross Fair Debt Securities HTM: December 31, 2021 U.S. Treasury $ 1 $ — $ — $ 1 U.S. government agencies 1 — — 1 Residential mortgage-backed securities: Agency mortgage-backed securities 1,191 15 (5) 1,201 Agency collateralized mortgage obligations 930 5 (12) 923 Commercial mortgage-backed securities 323 3 (2) 324 States of the U.S. and political subdivisions (municipals) 1,017 39 — 1,056 Total debt securities HTM $ 3,463 $ 62 $ (19) $ 3,506 There were no significant gross gains or gross losses realized on securities during the three months ended March 31, 2022 or 2021. As of March 31, 2022, the amortized cost and fair value of debt securities, by contractual maturities, were as follows: TABLE 4.3 Available for Sale Held to Maturity (in millions) Amortized Fair Amortized Fair Due in one year or less $ 9 $ 9 $ 1 $ 1 Due after one year but within five years 434 412 23 23 Due after five years but within ten years 106 105 141 137 Due after ten years 55 56 816 794 604 582 981 955 Residential mortgage-backed securities: Agency mortgage-backed securities 1,440 1,387 1,261 1,209 Agency collateralized mortgage obligations 1,236 1,169 943 888 Commercial mortgage-backed securities 320 308 328 312 Total debt securities $ 3,600 $ 3,446 $ 3,513 $ 3,364 Actual maturities may differ from contractual terms because security issuers may have the right to call or prepay obligations with or without penalties. Periodic principal payments are received on residential mortgage-backed securities based on the payment patterns of the underlying collateral. Following is information relating to securities pledged: TABLE 4.4 (dollars in millions) March 31, December 31, Securities pledged (carrying value): To secure public deposits, trust deposits and for other purposes as required by law $ 5,712 $ 5,660 As collateral for short-term borrowings 403 392 Securities pledged as a percent of total securities 87.9 % 87.9 % Following are summaries of the fair values of AFS debt securities in an unrealized loss position for which an ACL has not been recorded, segregated by security type and length of continuous loss position: TABLE 4.5 Less than 12 Months 12 Months or More Total (dollars in millions) # Fair Unrealized # Fair Unrealized # Fair Unrealized Debt Securities AFS March 31, 2022 U.S. Treasury 4 $ 194 $ (11) — $ — $ — 4 $ 194 $ (11) U.S. government agencies 6 50 — 9 7 — 15 57 — U.S. government-sponsored entities 11 181 (8) 1 23 (2) 12 204 (10) Residential mortgage-backed securities: Agency mortgage-backed securities 101 1,346 (54) — — — 101 1,346 (54) Agency collateralized mortgage obligations 60 952 (49) 7 196 (18) 67 1,148 (67) Commercial mortgage-backed securities 11 250 (10) 2 31 (2) 13 281 (12) States of the U.S. and political subdivisions (municipals) 12 27 (1) 1 3 (1) 13 30 (2) Other debt securities 5 6 — 1 2 — 6 8 — Total 210 $ 3,006 $ (133) 21 $ 262 $ (23) 231 $ 3,268 $ (156) Less than 12 Months 12 Months or More Total (dollars in millions) # Fair Unrealized # Fair Unrealized # Fair Unrealized Debt Securities AFS December 31, 2021 U.S. Treasury 3 $ 151 $ (1) — $ — $ — 3 $ 151 $ (1) U.S. government agencies 3 22 — 9 8 — 12 30 — U.S. government-sponsored entities 3 99 (1) 1 24 (1) 4 123 (2) Residential mortgage-backed securities: Agency mortgage-backed securities 13 599 (4) — — — 13 599 (4) Agency collateralized mortgage obligations 23 659 (15) 3 68 (2) 26 727 (17) Commercial mortgage-backed securities 5 125 (2) — — — 5 125 (2) States of the U.S. and political subdivisions 10 24 — — — — 10 24 — Other debt securities — — — 1 2 — 1 2 — Total 60 $ 1,679 $ (23) 14 $ 102 $ (3) 74 $ 1,781 $ (26) We evaluated the AFS debt securities that were in an unrealized loss position at March 31, 2022. Based on the credit ratings and implied government guarantee for these securities, we concluded the loss position is temporary and caused by the movement of interest rates and does not reflect any expected credit losses. We do not intend to sell the AFS debt securities and it is not more likely than not that we will be required to sell the securities before the recovery of their amortized cost basis. Credit Quality Indicators We use credit ratings and the most recent financial information to help evaluate the credit quality of our credit-related AFS and HTM securities portfolios. Management reviews the credit profile of each issuer on an annual basis, and more frequently as needed. Based on the nature of the issuers and current conditions, we have determined that securities backed by the UST, Fannie Mae, Freddie Mac, FHLB, Ginnie Mae, and the SBA have zero expected credit loss. Our municipal bond portfolio, with a carrying amount of $1.0 billion as of March 31, 2022 is highly rated with an average rating of AA and 100% of the portfolio having an A or better rating. All of the securities in the municipal portfolio are general obligation bonds. Geographically, municipal bonds support our primary footprint as 61% of the securities are from municipalities located in the primary states within which we conduct business. The average holding size of the securities in the municipal bond portfolio is $3.5 million. In addition to the strong stand-alone ratings, 60% of the municipal bonds have some formal credit enhancement (e.g., insurance) that strengthens the creditworthiness of the bond. The ACL on the HTM municipal bond portfolio is calculated on each bond using: • The bond’s underlying credit rating, time to maturity and exposure amount; • Credit enhancements that improve the bond’s credit rating (e.g., insurance); and • Moody’s U.S. Bond Defaults and Recoveries, 1970-2020 study. By using these components, we derive the expected credit loss on the HTM general obligation municipal bond portfolio. We further refine the expected credit loss by factoring in economic forecast data using our Commercial and Industrial Non-Manufacturing loan portfolio forecast adjustment as derived through our assessment of the loan portfolio as a proxy for our municipal bond portfolio. Our corporate bond portfolio, with a carrying amount of $16.9 million as of March 31, 2022 primarily consists of subordinated debentures of banks within our footprint. The average holding size of the securities in the corporate bond portfolio is $1.7 million. The ACL on the HTM corporate bond portfolio is calculated using: • The bond’s credit rating, time to maturity and exposure amount; • Moody’s Annual Default Study, 02/08/2022; and • Most recent financial statements. By using these components, we derive the expected credit loss on the HTM corporate bond portfolio. We further refine the expected credit loss by factoring in economic forecast data using our bank-wide loan portfolio forecast adjustment as derived through our assessment of the Bank's loan portfolio as a proxy for our corporate bond portfolio. For the year-to-date periods ending March 31, 2022 and 2021, we had no significant provision expense and no charge-offs or recoveries. The ACL on the HTM portfolio was $0.12 million and $0.05 million as of March 31, 2022 and December 31, 2021, respectively. No other securities portfolios had an ACL. At March 31, 2022 and December 31, 2021, there were no securities that were past due or on non-accrual.

LOANS AND LEASES

LOANS AND LEASES	3 Months Ended
	Mar. 31, 2022
Receivables [Abstract]
LOANS AND LEASES	LOANS AND LEASES Accrued interest receivable on loans and leases, which totaled $54.9 million at March 31, 2022 and $48.9 million at December 31, 2021, is excluded from the estimate of credit losses and assessed separately in other assets in the Consolidated Balance Sheets for both periods and not included in the following tables. Loans and Leases by Portfolio Segment Following is a summary of total loans and leases, net of unearned income: TABLE 5.1 (in millions) March 31, 2022 December 31, 2021 Commercial real estate $ 10,746 $ 9,899 Commercial and industrial 6,220 5,977 Commercial leases 471 495 Other 144 94 Total commercial loans and leases 17,581 16,465 Direct installment 2,568 2,376 Residential mortgages 4,188 3,654 Indirect installment 1,216 1,227 Consumer lines of credit 1,286 1,246 Total consumer loans 9,258 8,503 Total loans and leases, net of unearned income $ 26,839 $ 24,968 The remaining accretable discount included in the amortized cost of acquired loans was $37.1 million and $30.0 million at March 31, 2022 and December 31, 2021, respectively, which includes the $10 million established for Howard at the time of acquisition. The loans and leases portfolio categories are comprised of the following types of loans, where in each case the LGD is dependent on the nature and value of the respective collateral: • Commercial real estate includes both owner-occupied and non-owner-occupied loans secured by commercial properties where operational cash flows on owner-occupied properties or rents received by our borrowers from their tenant(s) on both a property and global basis are the primary default risk drivers, including rents paid by stand-alone business customers for owner-occupied properties; • Commercial and industrial includes loans to businesses that are not secured by real estate where the borrower's leverage and cash flows from operations are the primary default risk drivers, except for PPP loans that are 100% guaranteed by the SBA, which provides a reduced risk of loss to us on these loans. PPP loans are included in the commercial and industrial category and comprise $179.6 million and $336.6 million of this category's outstanding balance at March 31, 2022 and December 31, 2021, respectively; • Commercial leases consist of leases for new or used equipment where the borrower's cash flow from operations is the primary default risk driver; • Other is comprised primarily of credit cards and mezzanine loans where the borrower's cash flow from operations is the primary default risk driver; • Direct installment is comprised of fixed-rate, closed-end consumer loans for personal, family or household use, such as home equity loans and automobile loans where the primary default risk driver is the borrower's employment status and income; • Residential mortgages consist of conventional and jumbo mortgage loans for 1-4 family properties where the primary default risk driver is the borrower's employment status and income; • Indirect installment is comprised of loans originated by approved third parties and underwritten by us, primarily automobile loans where the primary default risk driver is the borrower's employment status and income; and • Consumer lines of credit include home equity lines of credit and consumer lines of credit that are either unsecured or secured by collateral other than home equity where the primary default risk driver is the borrower's employment status and income. The loans and leases portfolio consists principally of loans to individuals and small- and medium-sized businesses within our primary market in seven states and the District of Columbia. Our primary market coverage spans several major metropolitan areas including: Pittsburgh, Pennsylvania; Baltimore, Maryland; Cleveland, Ohio; Washington, D.C.; Charlotte, Raleigh, Durham and the Piedmont Triad (Winston-Salem, Greensboro and High Point) in North Carolina; and Charleston, South Carolina. The following table shows occupancy information relating to commercial real estate loans: TABLE 5.2 (dollars in millions) March 31, December 31, Commercial real estate: Percent owner-occupied 29.3 % 28.8 % Percent non-owner-occupied 70.7 71.2 Credit Quality We monitor the credit quality of our loan portfolio using several performance measures based on payment activity and borrower performance. We use an internal risk rating assigned to a commercial loan or lease at origination, summarized below. TABLE 5.3 Rating Category Definition Pass in general, the condition of the borrower and the performance of the loan is satisfactory or better Special Mention in general, the condition of the borrower has deteriorated, requiring an increased level of monitoring Substandard in general, the condition of the borrower has significantly deteriorated and the performance of the loan could further deteriorate if deficiencies are not corrected Doubtful in general, the condition of the borrower has significantly deteriorated and the collection in full of both principal and interest is highly questionable or improbable The use of these internally assigned credit quality categories within the commercial loan and lease portfolio permits our use of transition matrices to establish a basis which is then impacted by quantitative inputs from our econometric model forecasts over the R&S period. Our internal credit risk grading system is based on past experiences with similarly graded loans and leases and conforms to regulatory categories. In general, loan and lease risk ratings within each category are reviewed on an ongoing basis according to our policy for each class of loans and leases. Each quarter, we analyze the resulting ratings, as well as other external statistics and factors such as delinquency, to track the migration performance of the commercial loan and lease portfolio. Loans and leases within the Pass credit category or that migrate toward the Pass credit category generally have a lower risk of loss compared to loans and leases that migrate toward the Substandard or Doubtful credit categories. Accordingly, we apply higher risk factors to Substandard and Doubtful credit categories. The following tables summarize the designated loan rating category by loan class including term loans on an amortized cost basis by origination year: TABLE 5.4 March 31, 2022 2022 2021 2020 2019 2018 Prior Revolving Loans Amortized Cost Basis Total (in millions) COMMERCIAL Commercial Real Estate: Risk Rating: Pass $ 423 $ 2,123 $ 1,813 $ 1,480 $ 839 $ 2,937 $ 196 $ 9,811 Special Mention — 44 24 93 101 306 1 569 Substandard — — 16 43 54 244 9 366 Total commercial real estate 423 2,167 1,853 1,616 994 3,487 206 10,746 Commercial and Industrial: Risk Rating: Pass 426 1,444 823 697 390 475 1,576 5,831 Special Mention 1 7 16 18 28 101 32 203 Substandard — 8 11 14 26 62 65 186 Total commercial and industrial 427 1,459 850 729 444 638 1,673 6,220 Commercial Leases: Risk Rating: Pass 22 165 98 48 40 90 — 463 Special Mention — 1 — — — — — 1 Substandard — — 2 2 — 3 — 7 Total commercial leases 22 166 100 50 40 93 — 471 Other Commercial: Risk Rating: Pass 57 — — — — 15 72 144 Total other commercial 57 — — — — 15 72 144 Total commercial loans and leases 929 3,792 2,803 2,395 1,478 4,233 1,951 17,581 CONSUMER Direct Installment: Current 265 983 523 197 112 475 — 2,555 Past due — — 1 1 1 10 — 13 Total direct installment 265 983 524 198 113 485 — 2,568 Residential Mortgages: Current 237 1,470 929 418 152 935 — 4,141 Past due — 4 4 2 3 34 — 47 Total residential mortgages 237 1,474 933 420 155 969 — 4,188 Indirect Installment: Current 127 478 235 137 149 78 — 1,204 Past due — 5 2 2 1 2 — 12 Total indirect installment 127 483 237 139 150 80 — 1,216 Consumer Lines of Credit: Current 32 20 2 4 5 133 1,075 1,271 Past due — — — — — 13 2 15 Total consumer lines of credit 32 20 2 4 5 146 1,077 1,286 Total consumer loans 661 2,960 1,696 761 423 1,680 1,077 9,258 Total loans and leases $ 1,590 $ 6,752 $ 4,499 $ 3,156 $ 1,901 $ 5,913 $ 3,028 $ 26,839 December 31, 2021 2021 2020 2019 2018 2017 Prior Revolving Loans Amortized Cost Basis Total (in millions) COMMERCIAL Commercial Real Estate: Risk Rating: Pass $ 1,878 $ 1,782 $ 1,503 $ 830 $ 743 $ 2,171 $ 183 $ 9,090 Special Mention 15 21 89 105 107 175 9 521 Substandard — 15 28 45 45 152 3 288 Total commercial real estate 1,893 1,818 1,620 980 895 2,498 195 9,899 Commercial and Industrial: Risk Rating: Pass 1,663 833 731 386 184 296 1,509 5,602 Special Mention 8 12 18 7 37 42 52 176 Substandard 1 4 14 57 42 17 64 199 Total commercial and industrial 1,672 849 763 450 263 355 1,625 5,977 Commercial Leases: Risk Rating: Pass 182 109 98 53 39 1 — 482 Special Mention — 1 — 2 3 1 — 7 Substandard — 2 3 1 — — — 6 Total commercial leases 182 112 101 56 42 2 — 495 Other Commercial: Risk Rating: Pass 39 — — — — 3 52 94 Total other commercial 39 — — — — 3 52 94 Total commercial loans and leases 3,786 2,779 2,484 1,486 1,200 2,858 1,872 16,465 CONSUMER Direct Installment: Current 978 538 215 125 96 412 — 2,364 Past due — — 1 1 — 10 — 12 Total direct installment 978 538 216 126 96 422 — 2,376 Residential Mortgages: Current 1,280 932 392 152 212 652 — 3,620 Past due 1 1 1 3 3 25 — 34 Total residential mortgages 1,281 933 393 155 215 677 — 3,654 Indirect Installment: Current 516 262 157 178 64 35 — 1,212 Past due 6 3 2 2 1 1 — 15 Total indirect installment 522 265 159 180 65 36 — 1,227 Consumer Lines of Credit: Current 20 3 4 5 3 127 1,072 1,234 Past due — — — — — 10 2 12 Total consumer lines of credit 20 3 4 5 3 137 1,074 1,246 Total consumer loans 2,801 1,739 772 466 379 1,272 1,074 8,503 Total loans and leases $ 6,587 $ 4,518 $ 3,256 $ 1,952 $ 1,579 $ 4,130 $ 2,946 $ 24,968 We use delinquency transition matrices within the consumer and other loan classes to establish the basis for the R&S forecast portion of the credit risk. Each month, management analyzes payment and volume activity, Fair Isaac Corporation (FICO) scores and Debt-to-Income (DTI) scores and other external factors such as unemployment, to determine how consumer loans are performing. Non-Performing and Past Due The following tables provide an analysis of the aging of loans by class. TABLE 5.5 (in millions) 30-89 Days > 90 Days Past Due and Still Accruing Non- Total Current Total Non-accrual with No ACL March 31, 2022 Commercial real estate $ 16 $ — $ 53 $ 69 $ 10,677 $ 10,746 $ 26 Commercial and industrial 6 — 12 18 6,202 6,220 1 Commercial leases — — 1 1 470 471 — Other 2 — 1 3 141 144 — Total commercial loans and leases 24 — 67 91 17,490 17,581 27 Direct installment 6 — 7 13 2,555 2,568 — Residential mortgages 21 6 20 47 4,141 4,188 — Indirect installment 10 — 2 12 1,204 1,216 — Consumer lines of credit 7 2 6 15 1,271 1,286 — Total consumer loans 44 8 35 87 9,171 9,258 — Total loans and leases $ 68 $ 8 $ 102 $ 178 $ 26,661 $ 26,839 $ 27 (in millions) 30-89 Days > 90 Days Past Due and Still Accruing Non- Total Current Total Non-accrual with No ACL December 31, 2021 Commercial real estate $ 11 $ — $ 48 $ 59 $ 9,840 $ 9,899 $ 20 Commercial and industrial 4 — 15 19 5,958 5,977 4 Commercial leases 1 — 1 2 493 495 — Other — — — — 94 94 — Total commercial loans and leases 16 — 64 80 16,385 16,465 24 Direct installment 5 — 7 12 2,364 2,376 — Residential mortgages 20 4 10 34 3,620 3,654 — Indirect installment 12 1 2 15 1,212 1,227 — Consumer lines of credit 6 1 5 12 1,234 1,246 — Total consumer loans 43 6 24 73 8,430 8,503 — Total loans and leases $ 59 $ 6 $ 88 $ 153 $ 24,815 $ 24,968 $ 24 Following is a summary of non-performing assets: TABLE 5.6 (dollars in millions) March 31, December 31, Non-accrual loans $ 102 $ 88 Total non-performing loans 102 88 Other real estate owned 8 8 Total non-performing assets $ 110 $ 96 Asset quality ratios: Non-performing loans / total loans and leases 0.38 % 0.35 % Non-performing assets + 90 days past due / total loans and leases + OREO 0.44 0.41 The carrying value of residential-secured consumer OREO held as a result of obtaining physical possession upon completion of a foreclosure or through completion of a deed in lieu of foreclosure amounted to $1.4 million at March 31, 2022 and $1.6 million at December 31, 2021. The recorded investment of residential-secured consumer OREO for which formal foreclosure proceedings are in process at March 31, 2022 and December 31, 2021 totaled $9.1 million and $4.3 million, respectively. During 2020 and 2021, we extended the residential mortgage foreclosure moratorium beyond the requirements for government-backed loans under the CARES Act to all residential mortgage loan customers. Approximately $67.3 million of commercial loans are collateral dependent at March 31, 2022. Repayment is expected to be substantially through the operation or sale of the collateral on the loan. These loans are primarily secured by business assets or commercial real estate. Troubled Debt Restructurings TDRs are loans whose contractual terms have been modified in a manner that grants a concession to a borrower experiencing financial difficulties. TDRs typically result from loss mitigation activities and could include the extension of a maturity date, interest rate reduction, principal forgiveness, deferral or decrease in payments for a period of time and other actions intended to minimize the economic loss and to avoid foreclosure or repossession of collateral. Following is a summary of the composition of total TDRs: TABLE 5.7 (in millions) March 31, December 31, Accruing $ 60 $ 60 Non-accrual 32 32 Total TDRs $ 92 $ 92 TDRs that are accruing and performing include loans that met the criteria for non-accrual of interest prior to restructuring for which we can reasonably estimate the timing and amount of the expected cash flows on such loans and for which we expect to fully collect the new carrying value of the loans. During the three months ended March 31, 2022, we returned to accruing status $2.5 million in restructured residential mortgage loans that have consistently met their modified obligations for more than six months. TDRs that are on non-accrual are not placed on accruing status until all delinquent principal and interest have been paid and the ultimate collectability of the remaining principal and interest is reasonably assured. Some loan modifications classified as TDRs may not ultimately result in the full collection of principal and interest, as modified, and may result in potential incremental losses which are factored into the ACL. Commercial loans over $1.0 million whose terms have been modified in a TDR are generally placed on non-accrual, individually analyzed and measured based on the fair value of the underlying collateral. Our ACL includes specific reserves for commercial TDRs of $1.5 million at March 31, 2022, compared to $1.5 million at December 31, 2021, and pooled reserves for individual loans of $1.3 million and $1.5 million for those same periods, respectively, based on loan segment LGD. Upon default, the amount of the recorded investment in the TDR in excess of the fair value of the collateral, less estimated selling costs, is generally considered a confirmed loss and is charged-off against the ACL. All other classes of loans whose terms have been modified in a TDR are pooled and measured based on the loan segment LGD. Our ACL included pooled reserves for these classes of loans of $3.5 million for March 31, 2022 and $3.9 million for December 31, 2021. Upon default of an individual loan, our charge-off policy is followed for that class of loan. Following is a summary of TDR loans, by class, for loans that were modified during the periods indicated: TABLE 5.8 Three Months Ended March 31, 2022 (dollars in millions) Number Pre- Post- Commercial real estate 2 $ — $ — Total commercial loans 2 — — Direct installment 13 — — Residential mortgages 5 1 1 Consumer lines of credit 3 — — Total consumer loans 21 1 1 Total 23 $ 1 $ 1 Three Months Ended March 31, 2021 (dollars in millions) Number Pre- Post- Commercial real estate 11 $ 17 $ 17 Commercial and industrial 1 — — Total commercial loans 12 17 17 Direct installment 10 — — Residential mortgages 2 1 1 Consumer lines of credit 10 1 1 Total consumer loans 22 2 2 Total 34 $ 19 $ 19 Following is a summary of TDRs, by class, for which there was a payment default, excluding loans that have been paid off and/or sold. Default occurs when a loan is 90 days or more past due and is within 12 months of restructuring. TABLE 5.9 Three Months Ended (dollars in millions) Number of Recorded Commercial real estate 3 $ — Total commercial loans 3 — Direct installment 1 — Residential mortgages 1 — Total consumer loans 2 — Total 5 $ — Three Months Ended (dollars in millions) Number of Recorded Commercial and industrial 1 $ — Total commercial loans 1 — Residential mortgages 1 — Total consumer loans 1 — Total 2 $ —

ALLOWANCE FOR CREDIT LOSSES ON

ALLOWANCE FOR CREDIT LOSSES ON LOANS AND LEASES	3 Months Ended
	Mar. 31, 2022
Receivables [Abstract]
ALLOWANCE FOR CREDIT LOSSES ON LOANS AND LEASES	ALLOWANCE FOR CREDIT LOSSES ON LOANS AND LEASESThe ACL is maintained for credit losses expected in the existing loan and lease portfolio and is presented as a reserve against loans and leases on the Consolidated Balance Sheets. Loan and lease losses are charged off against the ACL, with recoveries of amounts previously charged off credited to the ACL. Provisions for credit losses are charged to operations based on management’s periodic evaluation of the appropriate level of the ACL. Following is a summary of changes in the ACL, by loan and lease class: TABLE 6.1 (in millions) Balance at Charge- Recoveries Net Provision for Credit Losses Allowance for PCD Loans and Leases at Acquisition Balance at Three Months Ended March 31, 2022 Commercial real estate $ 156.5 $ (1.0) $ 1.4 $ 0.4 $ 4.4 $ 4.4 $ 165.7 Commercial and industrial 87.4 (3.2) 1.3 (1.9) 2.8 3.4 91.7 Commercial leases 14.7 (0.1) — (0.1) (0.8) — 13.8 Other 2.6 (0.7) 0.2 (0.5) 1.7 — 3.8 Total commercial loans and leases 261.2 (5.0) 2.9 (2.1) 8.1 7.8 275.0 Direct installment 26.4 — 0.2 0.2 4.1 0.5 31.2 Residential mortgages 33.1 (0.1) 0.2 0.1 5.2 1.3 39.7 Indirect installment 13.5 (1.0) 0.7 (0.3) 1.0 — 14.2 Consumer lines of credit 10.1 (0.2) 0.4 0.2 (0.2) 0.4 10.5 Total consumer loans 83.1 (1.3) 1.5 0.2 10.1 2.2 95.6 Total allowance for credit losses on loans and leases 344.3 (6.3) 4.4 (1.9) 18.2 10.0 370.6 Allowance for unfunded loan commitments 19.1 — — — (0.3) — 18.8 Total allowance for credit losses on loans and leases and allowance for unfunded loan commitments $ 363.4 $ (6.3) $ 4.4 $ (1.9) $ 17.9 $ 10.0 $ 389.4 (in millions) Balance at Charge- Recoveries Net Provision Balance at Three Months Ended March 31, 2021 Commercial real estate $ 181 $ (1) $ 1 $ — $ 3 $ 184 Commercial and industrial 81 (8) 1 (7) 5 79 Commercial leases 17 — 1 1 (1) 17 Other 1 (1) 1 — — 1 Total commercial loans and leases 280 (10) 4 (6) 7 281 Direct installment 26 — — — — 26 Residential mortgages 34 — — — (2) 32 Indirect installment 11 (2) 1 (1) 1 11 Consumer lines of credit 12 — — — — 12 Total consumer loans 83 (2) 1 (1) (1) 81 Total allowance for credit losses on loans and leases 363 (12) 5 (7) 6 362 Allowance for unfunded loan commitments 14 — — — — 14 Total allowance for credit losses on loans and leases and allowance for unfunded loan commitments $ 377 $ (12) $ 5 $ (7) $ 6 $ 376 Following is a summary of changes in the AULC by portfolio segment: TABLE 6.2 Three Months Ended 2022 2021 (in millions) Balance at beginning of period $ 19 $ 14 Provision for unfunded loan commitments and letters of credit: Commercial portfolio — — Consumer portfolio — — Balance at end of period $ 19 $ 14 The model used to calculate the ACL is dependent on the portfolio composition and credit quality, as well as historical experience, current conditions and forecasts of economic conditions and interest rates. Specifically, the following considerations are incorporated into the ACL calculation: • a third-party macroeconomic forecast scenario; • a 24-month R&S forecast period for macroeconomic factors with a reversion to the historical mean on a straight-line basis over a 12-month period; and • the historical through-the-cycle mean was calculated using an expanded period to include a prior recessionary period. At March 31, 2022 and December 31, 2021, we utilized a third-party consensus macroeconomic forecast due to the improving macroeconomic environment. For our ACL calculation at March 31, 2022, the macroeconomic variables that we utilized included, but were not limited to: (i) the purchase only Housing Price Index, which reflects growth of 4.7% over our R&S forecast period, (ii) a Commercial Real Estate Price Index, which reflects growth of 16.1% over our R&S forecast period, (iii) S&P Volatility, which decreases 0.3% in 2022 and 5.5% in 2023 and (iv) bankruptcies, which increase steadily over the R&S forecast period but average below historical levels. Macroeconomic variables that we utilized for our ACL calculation as of December 31, 2021 included, but were not limited to: (i) the purchase only Housing Price Index, which reflects growth of 6.3% over our R&S forecast period, (ii) a Commercial Real Estate Price Index, which reflects growth of 13.0% over our R&S forecast period, (iii) S&P Volatility, which increases 15.2% in 2022 and 1.9% in 2023 and (iv) bankruptcies, which increase steadily over the R&S forecast period but average below historical levels. The ACL on loans and leases of $370.6 million at March 31, 2022 increased $26.4 million, or 7.7%, from December 31, 2021 primarily due to the Howard acquisition and the associated ACL attributable to the acquired loans and leases, partially offset by positive credit quality trends. Our ending ACL coverage ratio at March 31, 2022 was 1.38%, compared to 1.38% at December 31, 2021. Total provision for credit losses for the three months ended March 31, 2022 included $19.1 million of initial provision for non-PCD loans associated with the Howard acquisition. Net charge-offs were $1.9 million during the three months ended March 31, 2022, compared to $7.1 million during the three months ended March 31, 2021, reflecting continued strong underlying portfolio credit trends.

LOAN SERVICING

LOAN SERVICING	3 Months Ended
	Mar. 31, 2022
Transfers and Servicing [Abstract]
LOAN SERVICING	LOAN SERVICING Mortgage Loan Servicing We retain the servicing rights on certain mortgage loans sold. The unpaid principal balance of mortgage loans serviced for others is listed below: TABLE 7.1 (in millions) March 31, December 31, Mortgage loans sold with servicing retained $ 4,985 $ 4,855 The following table summarizes activity relating to mortgage loans sold with servicing retained: TABLE 7.2 Three Months Ended (in millions) 2022 2021 Mortgage loans sold with servicing retained $ 351 $ 506 Pretax net gains resulting from above loan sales (1) 1 17 Mortgage servicing fees (1) 3 3 (1) Recorded in mortgage banking operations on the Consolidated Statements of Income. Following is a summary of activity relating to MSRs: TABLE 7.3 Three Months Ended (in millions) 2022 2021 Balance at beginning of period $ 44.4 $ 35.6 Additions 4.1 5.2 Payoffs and curtailments (1.6) (4.1) (Impairment charge) / recovery 2.3 2.5 Amortization (0.7) (0.6) Balance at end of period $ 48.5 $ 38.6 Fair value, beginning of period $ 46.0 $ 35.6 Fair value, end of period 58.2 40.2 We had a $0.2 million valuation allowance for MSRs as of March 31, 2022, compared to $2.5 million at December 31, 2021. The fair value of MSRs is highly sensitive to changes in assumptions and is determined by estimating the present value of the asset’s future cash flows utilizing market-based prepayment rates, discount rates and other assumptions validated through comparison to trade information, industry surveys and with the use of independent third-party valuations. Changes in prepayment speed assumptions have the most significant impact on the fair value of MSRs. Generally, as interest rates decline, mortgage loan prepayments accelerate due to increased refinance activity, which results in a decrease in the fair value of MSRs and as interest rates increase, mortgage loan prepayments decline, which results in an increase in the fair value of MSRs. Measurement of fair value is limited to the conditions existing and the assumptions utilized as of a particular point in time, and those assumptions may not be appropriate if they are applied at a different time. Following is a summary of the sensitivity of the fair value of MSRs to changes in key assumptions: TABLE 7.4 (dollars in millions) March 31, December 31, Weighted average life (months) 89.9 76.6 Constant prepayment rate (annualized) 8.4 % 11.2 % Discount rate 9.5 % 9.5 % Effect on fair value due to change in interest rates: +2.00% $ 11 $ 15 +1.00% 6 9 +0.50% 4 5 +0.25% 2 3 -0.25% (3) (3) -0.50% (6) (7) The sensitivity calculations above are hypothetical and should not be considered to be predictive of future performance. Changes in fair value based on adverse changes in assumptions generally cannot be extrapolated because the relationship of the changes in assumptions to fair value may not be linear. Also, in this table, the effects of an adverse variation in a particular assumption on the fair value of MSRs is calculated without changing any other assumptions, while in reality, changes in one factor may result in changing another, which may magnify or contract the effect of the change.

LEASES

LEASES	3 Months Ended
	Mar. 31, 2022
Leases [Abstract]
LEASES	LEASES We have operating leases primarily for certain branches, office space, land and office equipment. We have finance leases for certain branches. Our operating leases expire at various dates through the year 2046 and generally include one or more options to renew. Our finance leases expire at various dates through the year 2051 and generally include one or more options to renew. The exercise of lease renewal options is at our sole discretion. As of March 31, 2022, we had operating lease right-of-use assets operating lease liabilities finance lease right-of-use assets finance lease liabilities Our operating lease agreements do not contain any material residual value guarantees or material restrictive covenants. As of March 31, 2022, we have certain operating lease agreements, primarily for administrative office space, that have not yet commenced. At commencement, it is expected that these leases will add approximately $69.2 million in right-of-use assets and $90.6 million in other liabilities. These operating leases are currently expected to commence in 2023 with lease terms up to 16 years. These operating leases include the lease, with a related party, of the future new FNB headquarters building in Pittsburgh, Pennsylvania. The related party operating lease is accounted for in a manner consistent with all other leases on the basis of the legally enforceable terms and conditions of the lease and represents a VIE for which we are not the primary beneficiary. The components of lease expense were as follows: TABLE 8.1 Three Months Ended (dollars in millions) 2022 2021 Operating lease cost $ 8 $ 7 Variable lease cost 1 1 Total lease cost $ 9 $ 8 Other information related to leases is as follows: TABLE 8.2 Three Months Ended (dollars in millions) 2022 2021 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 7 $ 7 Operating cash flows from finance leases $ — $ — Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 2 $ — Finance leases $ 4 $ — Weighted average remaining lease term (years): Operating leases 9.69 9.39 Finance leases 23.08 0 Weighted average discount rate: Operating leases 2.4 % 2.6 % Finance leases 2.0 % — % Maturities of lease liabilities were as follows: TABLE 8.3 (in millions) Operating Leases Finance Leases Total Leases March 31, 2022 2022 $ 20 $ — $ 20 2023 23 1 24 2024 21 1 22 2025 15 1 16 2026 12 1 13 Later years 75 16 91 Total lease payments 166 20 186 Less: imputed interest (20) (4) (24) Present value of lease liabilities $ 146 $ 16 $ 162 As a lessor we offer commercial leasing services to customers in need of new or used equipment primarily within our market areas of Pennsylvania, Ohio, Maryland, North Carolina, South Carolina and West Virginia. Additional information relating to commercial leasing is provided in Note 5, “Loans and Leases” in the Notes to Consolidated Financial Statements.
LEASES	LEASES We have operating leases primarily for certain branches, office space, land and office equipment. We have finance leases for certain branches. Our operating leases expire at various dates through the year 2046 and generally include one or more options to renew. Our finance leases expire at various dates through the year 2051 and generally include one or more options to renew. The exercise of lease renewal options is at our sole discretion. As of March 31, 2022, we had operating lease right-of-use assets operating lease liabilities finance lease right-of-use assets finance lease liabilities Our operating lease agreements do not contain any material residual value guarantees or material restrictive covenants. As of March 31, 2022, we have certain operating lease agreements, primarily for administrative office space, that have not yet commenced. At commencement, it is expected that these leases will add approximately $69.2 million in right-of-use assets and $90.6 million in other liabilities. These operating leases are currently expected to commence in 2023 with lease terms up to 16 years. These operating leases include the lease, with a related party, of the future new FNB headquarters building in Pittsburgh, Pennsylvania. The related party operating lease is accounted for in a manner consistent with all other leases on the basis of the legally enforceable terms and conditions of the lease and represents a VIE for which we are not the primary beneficiary. The components of lease expense were as follows: TABLE 8.1 Three Months Ended (dollars in millions) 2022 2021 Operating lease cost $ 8 $ 7 Variable lease cost 1 1 Total lease cost $ 9 $ 8 Other information related to leases is as follows: TABLE 8.2 Three Months Ended (dollars in millions) 2022 2021 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 7 $ 7 Operating cash flows from finance leases $ — $ — Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 2 $ — Finance leases $ 4 $ — Weighted average remaining lease term (years): Operating leases 9.69 9.39 Finance leases 23.08 0 Weighted average discount rate: Operating leases 2.4 % 2.6 % Finance leases 2.0 % — % Maturities of lease liabilities were as follows: TABLE 8.3 (in millions) Operating Leases Finance Leases Total Leases March 31, 2022 2022 $ 20 $ — $ 20 2023 23 1 24 2024 21 1 22 2025 15 1 16 2026 12 1 13 Later years 75 16 91 Total lease payments 166 20 186 Less: imputed interest (20) (4) (24) Present value of lease liabilities $ 146 $ 16 $ 162 As a lessor we offer commercial leasing services to customers in need of new or used equipment primarily within our market areas of Pennsylvania, Ohio, Maryland, North Carolina, South Carolina and West Virginia. Additional information relating to commercial leasing is provided in Note 5, “Loans and Leases” in the Notes to Consolidated Financial Statements.

VARIABLE INTEREST ENTITIES

VARIABLE INTEREST ENTITIES	3 Months Ended
	Mar. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
VARIABLE INTEREST ENTITIES	VARIABLE INTEREST ENTITIESWe evaluate our interest in certain entities to determine if these entities meet the definition of a VIE and whether we are the primary beneficiary and required to consolidate the entity based on the variable interest we held both at inception and when there is a change in circumstances that requires a reconsideration. Unconsolidated VIEs The following table provides a summary of the assets and liabilities included in our Consolidated Financial Statements, as well as the maximum exposure to losses, associated with our interests related to VIEs for which we hold an interest, but are not the primary beneficiary, at March 31, 2022 and December 31, 2021. TABLE 9.1 (in millions) Total Assets Total Liabilities Maximum Exposure to Loss March 31, 2022 Trust preferred securities (1) $ 1 $ 67 $ — Affordable housing tax credit partnerships 118 31 118 Other investments 32 5 32 Total $ 151 $ 103 $ 150 December 31, 2021 Trust preferred securities (1) $ 1 $ 67 $ — Affordable housing tax credit partnerships 121 34 121 Other investments 28 6 28 Total $ 150 $ 107 $ 149 (1) Represents our investment in unconsolidated subsidiaries. Trust-Preferred Securities We have certain wholly-owned trusts whose assets, liabilities, equity, income and expenses are not included within our Consolidated Financial Statements. These trusts have been formed for the sole purpose of issuing TPS, from which the proceeds are then invested in our junior subordinated debentures, which are reflected in our Consolidated Balance Sheets as subordinated notes. The TPS are the obligations of the trusts, and as such, are not consolidated within our Consolidated Financial Statements. For additional information relating to our TPS, see Note 10, “Borrowings” in the Notes to Consolidated Financial Statements. Each issue of the junior subordinated debentures has an interest rate equal to the corresponding TPS distribution rate. We have the right to defer payment of interest on the debentures at any time, or from time-to-time for a period not exceeding five years provided that no extension period may extend beyond the stated maturity of the related debentures. During any such extension period, distributions to the TPS will also be deferred and our ability to pay dividends on our common stock will be restricted. Periodic cash payments and payments upon liquidation or redemption with respect to TPS are guaranteed by us to the extent of funds held by the trusts. The guarantee ranks subordinate and junior in right of payment to all of our indebtedness to the same extent as the junior subordinated debt. The guarantee does not place a limitation on the amount of additional indebtedness that may be incurred by us. Affordable Housing Tax Credit Partnerships We make equity investments as a limited partner in various partnerships that sponsor affordable housing projects utilizing the LIHTC pursuant to Section 42 of the Internal Revenue Code. The purpose of these investments is to support initiatives associated with the Community Reinvestment Act while earning a satisfactory return. The activities of these LIHTC partnerships include the development and operation of multi-family housing that is leased to qualifying residential tenants. These partnerships are generally located in communities where we have a banking presence and meet the definition of a VIE; however, we are not the primary beneficiary of the entities, as the general partner or managing member has both the power to direct the activities that most significantly impact the economic performance of the entities and the obligation to absorb losses beyond our own equity investment. We record our investment in LIHTC partnerships as a component of other assets and use the proportional amortization method to account for our investments in LIHTC partnerships. Amortization related to our LIHTC investments is recorded on a net basis as a component of the provision for income taxes on the Consolidated Statements of Income. The following table presents the balances of our affordable housing tax credit investments and related unfunded commitments: TABLE 9.2 (in millions) March 31, December 31, LIHTC investments included in other assets $ 87 $ 87 Unfunded LIHTC commitments 31 34 The following table summarizes the impact of these LIHTC investments on the provision for income taxes in our Consolidated Statements of Income: TABLE 9.3 Three Months Ended (in millions) 2022 2021 Provision for income taxes: Amortization of LIHTC investments under proportional method $ 4 $ 3 Low-income housing tax credits (4) (3) Other tax benefits related to tax credit investments (1) (1) Total impact on provision for income taxes $ (1) $ (1) Other Investments Other investments we also consider to be unconsolidated VIE’s include investments in Small Business Investment Companies, Historic Tax Credit investments, and other equity method investments.

BORROWINGS

BORROWINGS	3 Months Ended
	Mar. 31, 2022
Debt Disclosure [Abstract]
BORROWINGS	BORROWINGS Following is a summary of short-term borrowings: TABLE 10.1 (in millions) March 31, December 31, Securities sold under repurchase agreements $ 363 $ 376 Federal Home Loan Bank advances 930 1,030 Subordinated notes 132 130 Total short-term borrowings $ 1,425 $ 1,536 Borrowings with original maturities of one year or less are classified as short-term. Securities sold under repurchase agreements are comprised of customer repurchase agreements, which are sweep accounts with next-day maturities utilized by larger commercial customers to earn interest on their funds. Securities are pledged to these customers in an amount at least equal to the outstanding balance. We did not have any short-term FHLB advances with overnight maturities as of March 31, 2022 or December 31, 2021. At March 31, 2022, $0.9 billion, or 100.0%, of the short-term FHLB advances were swapped to fixed rates with various maturities through 2024. This compares to $1.0 billion, or 100.0%, as of December 31, 2021. Following is a summary of long-term borrowings: TABLE 10.2 (in millions) March 31, December 31, Senior notes $ 299 $ 299 Subordinated notes 68 68 Junior subordinated debt 72 67 Other subordinated debt 274 248 Total long-term borrowings $ 713 $ 682 We assumed $25 million of other subordinated debt and $5 million of junior subordinated debt from the Howard acquisition. Those additions are reflected in the balances above and in the tables below. Our banking affiliate has available credit with the FHLB of $8.7 billion, of which $0.9 billion was utilized and included in short-term borrowings as of March 31, 2022. The short-term FHLB borrowings are secured by loans collateralized by residential mortgages, home equity lines of credit, commercial real estate and FHLB stock and are scheduled to mature in various amounts periodically during 2022. There were no long-term FHLB borrowings as of March 31, 2022 or December 31, 2021. Effective interest rates paid on the long-term FHLB borrowings held during 2021 ranged from 0.26% to 0.29% for the year ended December 31, 2021. The following table provides information relating to our senior notes and other subordinated debt as of March 31, 2022. The subordinated notes are eligible for treatment as tier 2 capital for regulatory capital purposes. TABLE 10.3 (dollars in millions) Aggregate Principal Amount Issued Net Proceeds (4) Carrying Value Stated Maturity Date Interest 2.20% Senior Notes due February 24, 2023 $ 300 $ 298 $ 299 2/24/2023 2.20 % 4.95% Fixed-To-Floating Rate Subordinated Notes due 2029 (1) 120 118 119 2/14/2029 4.95 % 4.875% Subordinated Notes due 2025 100 98 99 10/2/2025 4.875 % 7.625% Subordinated Notes due August 12, 2023 (3) 38 46 30 8/12/2023 7.625 % 6.00% Fixed-To-Floating Rate Subordinated Notes due December 6, 2028 (2) (3) 25 26 26 12/6/2028 6.00 % Total $ 583 $ 586 $ 573 (1) Fixed-to-floating rate until February 14, 2024, at which time the floating rate will be three-month LIBOR plus 240 basis points (bps), or an alternative rate that may replace LIBOR, as specified in the prospectus for this offering. (2) Fixed-to-floating rate until December 6, 2023, at which time the floating rate will be three-month LIBOR plus 302 bps, or an alternative rate that may replace LIBOR, as specified in the prospectus for this offering. (3) Assumed from an acquisition and adjusted to fair value at the time of acquisition. (4) After deducting underwriting discounts and commissions and offering costs. For the debt assumed from acquisitions, this is the fair value of the debt at the time of the acquisition. The junior subordinated debt is comprised of the debt securities issued by FNB, or companies we acquired, in relation to our unconsolidated subsidiary trusts (collectively, the Trusts), which are unconsolidated VIEs, and are included on the Consolidated Balance Sheets in long-term borrowings. Since third-party investors are the primary beneficiaries, the Trusts are not consolidated in our Financial Statements. We record the distributions on the junior subordinated debt issued to the Trusts as interest expense. The following table provides information relating to the Trusts as of March 31, 2022: TABLE 10.4 (dollars in millions) Trust Common Junior Stated Interest Rate Rate Reset Factor F.N.B. Statutory Trust II $ 22 $ 1 $ 22 6/15/2036 2.48 % LIBOR + 165 bps Yadkin Valley Statutory Trust I 25 1 22 12/15/2037 2.15 % LIBOR + 132 bps FNB Financial Services Capital Trust I 25 1 23 9/30/2035 2.46 % LIBOR + 146 bps Patapsco Statutory Trust I 5 — 5 12/15/2035 2.31 % LIBOR + 148 bps Total $ 77 $ 3 $ 72

DERIVATIVE INSTRUMENTS AND HEDG

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES	3 Months Ended
	Mar. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES	DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES We are exposed to certain risks arising from both our business operations and economic conditions. We principally manage our exposures to a wide variety of business and operational risks through management of our core business activities. We manage economic risks, including interest rate risk, primarily by managing the amount, source, and duration of our assets and liabilities, and through the use of derivative instruments. Derivative instruments are used to reduce the effects that changes in interest rates may have on net income and cash flows. We also use derivative instruments to facilitate transactions on behalf of our customers. All derivatives are carried on the Consolidated Balance Sheets at fair value and do not take into account the effects of master netting arrangements we have with other financial institutions. Credit risk is included in the determination of the estimated fair value of derivatives. Derivative assets are reported in the Consolidated Balance Sheets in other assets and derivative liabilities are reported in other liabilities. Changes in fair value are recognized in earnings except for certain changes related to derivative instruments designated as part of a cash flow hedging relationship, which are recognized in other comprehensive income. The following table presents notional amounts and gross fair values of our derivative assets and derivative liabilities which are not offset in the Consolidated Balance Sheets: TABLE 11.1 March 31, 2022 December 31, 2021 Notional Fair Value Notional Fair Value (in millions) Amount Asset Liability Amount Asset Liability Gross Derivatives Subject to master netting arrangements: Interest rate contracts – designated $ 1,980 $ — $ — $ 2,080 $ 1 $ — Interest rate swaps – not designated 5,469 14 10 5,547 2 20 Total subject to master netting arrangements 7,449 14 10 7,627 3 20 Not subject to master netting arrangements: Interest rate swaps – not designated 5,469 37 145 5,547 172 24 Interest rate lock commitments – not designated 381 — 13 482 9 — Forward delivery commitments – not designated 435 9 — 502 1 1 Credit risk contracts – not designated 364 — — 368 — — Total not subject to master netting arrangements 6,649 46 158 6,899 182 25 Total $ 14,098 $ 60 $ 168 $ 14,526 $ 185 $ 45 Certain derivative exchanges have enacted a rule change which in effect results in the legal characterization of variation margin payments for certain derivative contracts as settlement of the derivatives mark-to-market exposure and not collateral. Accordingly, we have changed our reporting of certain derivatives to record variation margin on trades cleared through these exchanges as settled. The daily settlement of the derivative exposure does not change or reset the contractual terms of the instrument. We adopted RRR on October 1, 2020, and the guidance will be followed until the Update terminates on December 31, 2022. As of October 16, 2020, we changed our valuation methodology to reflect changes made by central clearinghouses that changed the discounting methodology and interest calculation of cash migration from overnight index swap (OIS) to SOFR for U.S. dollar cleared interest rate swaps to better reflect prices obtainable in the markets in which we transact. Certain of these valuation methodology changes were applied to eligible hedging relationships. Accordingly, we have updated our hedge documentation to reflect the election of certain expedients and exceptions related to our cash flow hedging programs. The change in valuation methodology was applied prospectively as a change in accounting estimate and did not have a material impact on our consolidated financial position or results of operations. Derivatives Designated as Hedging Instruments under GAAP Interest Rate Contracts. We entered into interest rate derivative agreements to modify the interest rate characteristics of certain commercial loans and certain of our FHLB advances from variable rate to fixed rate in order to reduce the impact of changes in future cash flows due to market interest rate changes. These agreements are designated as cash flow hedges, hedging the exposure to variability in expected future cash flows. The derivative’s gain or loss, including any ineffectiveness, is initially reported as a component of other comprehensive income and subsequently reclassified into earnings in the same line item associated with the forecasted transaction when the forecasted transaction affects earnings. The following table shows amounts reclassified from AOCI: TABLE 11.2 Amount of Gain (Loss) Recognized in OCI on Derivatives Location of Gain (Loss) Reclassified from AOCI into Income Amount of Gain (Loss) Reclassified from AOCI into Income Three Months Ended Three Months Ended (in millions) 2022 2021 2022 2021 Derivatives in cash flow hedging relationships: Interest rate contracts $ (19) $ 5 Interest income (expense) $ (2) $ (5) Other income — — The following table represents gains (losses) recognized in the Consolidated Statements of Income on cash flow hedging relationships: TABLE 11.3 Three months ended March 31, 2022 2021 (in millions) Interest Income - Loans and Leases Interest Expense - Short-Term Borrowings Interest Income - Loans and Leases Interest Expense - Short-Term Borrowings Total amounts of income and expense line items presented in the Consolidated Statements of Income (the effects of cash flow hedges are included in these line items) $ 221 $ 6 $ 221 $ 7 The effects of cash flow hedging: Gain (loss) on cash flow hedging relationships: Interest rate contracts: Amount of gain (loss) reclassified from AOCI into net income 2 (4) — (5) As of March 31, 2022, the maximum length of time over which forecasted interest cash flows are hedged is 3.5 years. In the twelve months that follow March 31, 2022, we expect to reclassify from the amount currently reported in AOCI net derivative losses of $11.2 million ($8.7 million net of tax), in association with interest on the hedged loans and FHLB advances. 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, 2022. There were no components of derivative gains or losses excluded from the assessment of hedge effectiveness related to these cash flow hedges. Also, during the three months ended March 31, 2022 and 2021, there were no gains or losses from cash flow hedge derivatives reclassified to earnings because it became probable that the original forecasted transactions would not occur. Derivatives Not Designated as Hedging Instruments under GAAP A description of interest rate swaps, interest rate lock commitments, forward delivery commitments and credit risk contracts can be found in Note 15, "Derivative Instruments and Hedging Activities" in the Consolidated Financial Statements included in our 202 1 Annual Report on Form 10-K filed with the SEC on February 24, 2022. Interest rate swap agreements with loan customers and with the offsetting counterparties are reported at fair value in other assets and other liabilities on the Consolidated Balance Sheets with any resulting gain or loss recorded in current period earnings as other income or other expense. Risk participation agreements sold with notional amounts totaling $249.8 million as of March 31, 2022 have remaining terms ranging from four months to nineteen years. Under these agreements, our maximum exposure assuming a customer defaults on their obligation to perform under certain derivative swap contracts with third parties would be $0.1 million at March 31, 2022 and $0.2 million at December 31, 2021. The fair values of risk participation agreements purchased and sold were $0.1 million and $0.1 million, respectively, at March 31, 2022 and $0.1 million and $0.2 million, respectively at December 31, 2021. The following table presents the effect of certain derivative financial instruments on the Consolidated Statements of Income: TABLE 11.4 Three Months Ended (in millions) Consolidated Statements of Income Location 2022 2021 Interest rate swaps Non-interest income - other $ — $ — Interest rate lock commitments Mortgage banking operations — — Forward delivery contracts Mortgage banking operations 9 9 Credit risk contracts Non-interest income - other — — Counterparty Credit Risk We are party to master netting arrangements with most of our swap derivative dealer counterparties. Collateral, usually marketable securities and/or cash, is exchanged between FNB and our counterparties, and is generally subject to thresholds and transfer minimums. For swap transactions that require central clearing, we post cash to our clearing agency. Collateral positions are settled or valued daily, and adjustments to amounts received and pledged by us are made as appropriate to maintain proper collateralization for these transactions. Certain master netting agreements contain provisions that, if violated, could cause the counterparties to request immediate settlement or demand full collateralization under the derivative instrument. If we had breached our agreements with our derivative counterparties we would be required to settle our obligations under the agreements at the termination value and would be required to pay an additional $0.1 million and $0.2 million as of March 31, 2022 and December 31, 2021, respectively, in excess of amounts previously posted as collateral with the respective counterparty. The following table presents a reconciliation of the net amounts of derivative assets and derivative liabilities presented in the Consolidated Balance Sheets to the net amounts that would result in the event of offset: TABLE 11.5 Amount Not Offset in the (in millions) Net Amount Financial Cash Net March 31, 2022 Derivative Assets Interest rate contracts: Not designated $ 14 $ — $ 14 $ — Total $ 14 $ — $ 14 $ — Derivative Liabilities Interest rate contracts: Not designated $ 10 $ — $ 10 $ — Total $ 10 $ — $ 10 $ — December 31, 2021 Derivative Assets Interest rate contracts: Designated $ 1 $ — $ 1 $ — Not designated 2 — 2 — Total $ 3 $ — $ 3 $ — Derivative Liabilities Interest rate contracts: Not designated $ 20 $ — $ 20 $ — Total $ 20 $ — $ 20 $ —

COMMITMENTS, CREDIT RISK AND CO

COMMITMENTS, CREDIT RISK AND CONTINGENCIES	3 Months Ended
	Mar. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS, CREDIT RISK AND CONTINGENCIES	COMMITMENTS, CREDIT RISK AND CONTINGENCIES We have commitments to extend credit and standby letters of credit that involve certain elements of credit risk in excess of the amount stated in the Consolidated Balance Sheets. Our exposure to credit loss in the event of non-performance by the customer is represented by the contractual amount of those instruments. The credit risk associated with commitments to extend credit and standby letters of credit is essentially the same as that involved in extending loans and leases to customers and is subject to normal credit policies. Since many of these commitments expire without being drawn upon, the total commitment amounts do not necessarily represent future cash flow requirements. Following is a summary of off-balance sheet credit risk information: TABLE 12.1 (in millions) March 31, December 31, Commitments to extend credit $ 12,069 $ 11,228 Standby letters of credit 204 194 At March 31, 2022, funding of 72.9% of the commitments to extend credit was dependent on the financial condition of the customer. We have the ability to withdraw such commitments at our discretion. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Based on management’s credit evaluation of the customer, collateral may be deemed necessary. Collateral requirements vary and may include accounts receivable, inventory, property, plant and equipment and income-producing commercial properties. Standby letters of credit are conditional commitments issued by us that may require payment at a future date. The credit risk involved in issuing letters of credit is actively monitored through review of the historical performance of our portfolios. Our AULC for commitments that are not unconditionally cancellable, which is included in other liabilities on the Consolidated Balance Sheets, was $18.8 million at March 31, 2022 and $19.2 million at December 31, 2021. Additional information relating to the AULC is provided in Note 6, "Allowance for Credit Losses on Loans and Leases" in the Notes to Consolidated Financial Statements. In addition to the above commitments, subordinated notes issued by FNB Financial Services, LP, a wholly-owned finance subsidiary, are fully and unconditionally guaranteed by FNB. These subordinated notes are included in the summaries of short-term borrowings and long-term borrowings in Note 10, “Borrowings” in the Notes to Consolidated Financial Statements. Other Legal Proceedings In the ordinary course of business, we may assert claims in legal proceedings against another party or parties, and we are routinely named as defendants in, or made parties to, pending and potential legal actions. Also, as regulated entities, we are subject to governmental and regulatory examinations, information-gathering requests, and may be subject to investigations and proceedings (both formal and informal). Such threatened claims, litigation, investigations, regulatory and administrative proceedings typically entail matters that are considered incidental to the normal conduct of business. Claims for significant monetary damages may be asserted in many of these types of legal actions, while claims for disgorgement, reimbursement, restitution, penalties and/or other remedial actions or sanctions may be sought in regulatory matters. In these instances, if we determine that we have meritorious defenses, we will engage in an aggressive defense. However, if management determines, in consultation with counsel, that settlement of a matter is in the best interest of FNB and our shareholders, we may do so. It is inherently difficult to predict the eventual outcomes of such matters given their complexity and the particular facts and circumstances at issue in each of these matters. However, on the basis of current knowledge and understanding, and advice of counsel, we do not believe that judgments, sanctions, settlement resolutions, regulatory actions, investigations, settlements or orders, if any, that have arisen or may arise from these matters (either individually or in the aggregate, after giving effect to applicable reserves and insurance coverage) will have a material adverse effect on our financial position or liquidity, although they could potentially have a material effect on net income in a given period. In view of the inherent unpredictability of outcomes in litigation and governmental and regulatory matters, particularly where (i) the damages sought are indeterminate, (ii) the proceedings are in the early stages, or (iii) the matters involve novel legal theories or a large number of parties, as a matter of course, there is considerable uncertainty surrounding the timing or ultimate resolution of litigation and governmental and regulatory matters, including a possible eventual loss, fine, restitution, penalty, business or adverse reputational impact, if any, associated with each such matter. In accordance with applicable accounting guidance, we establish accruals for litigation and governmental and regulatory matters when those matters proceed to a stage where they present loss contingencies that are both probable and reasonably estimable. In such cases, there may be a possible exposure to loss in excess of any amounts accrued. We will continue to monitor such matters for developments that could affect the amount of the accrual, and will adjust the accrual amount as appropriate. If the loss contingency in question is not both probable and reasonably estimable, we do not establish an accrual and the matter will continue to be monitored for any developments that would make the loss contingency both probable and reasonably estimable. We believe that our accruals for legal proceedings are appropriate and, in the aggregate, are not material to our consolidated financial position, although future accruals could have a material effect on net income in a given period.

STOCK INCENTIVE PLANS

STOCK INCENTIVE PLANS	3 Months Ended
	Mar. 31, 2022
Share-based Payment Arrangement [Abstract]
STOCK INCENTIVE PLANS	STOCK INCENTIVE PLANS Restricted Stock We issue restricted stock awards to key employees under our Incentive Compensation Plan (Plan). We issue time-based awards and performance-based awards under this Plan, both of which are based on a three-year vesting period. The grant date fair value of the time-based awards is equal to the price of our common stock on the grant date. The fair value of the performance-based awards is based on a Monte-Carlo simulation valuation of our common stock as of the grant date. The assumptions used for this valuation include stock price volatility, risk-free interest rate and dividend yield. We granted 495,844 and 542,136 restricted stock units during the three months ended March 31, 2022 and 2021, respectively, including 297,508 and 325,284 performance-based restricted stock units during those same periods, respectively. As of March 31, 2022, we had available up to 3,909,215 shares of common stock to issue under this Plan. The unvested restricted stock unit awards are eligible to receive cash dividends or dividend equivalents which are ultimately used to purchase additional shares of stock and are subject to forfeiture if the requisite service period is not completed or the specified performance criteria are not met. These awards are subject to certain accelerated vesting provisions upon retirement, death, disability or in the event of a change of control as defined in the award agreements. The following table summarizes the activity relating to restricted stock units during the periods indicated: TABLE 13.1 Three Months Ended March 31, 2022 2021 Units Weighted Units Weighted Unvested units outstanding at beginning of period 4,680,786 $ 9.71 4,322,115 $ 9.46 Granted 495,844 14.22 542,136 12.61 Acquired 60,300 9.41 — — Net adjustment due to performance — — 327,256 11.84 Vested (216,373) 8.77 (142,687) 7.29 Forfeited/expired/canceled (18,239) 9.34 (8,334) 7.52 Dividend reinvestment 46,696 12.85 42,310 13.43 Unvested units outstanding at end of period 5,049,014 10.22 5,082,796 10.05 The following table provides certain information related to restricted stock units: TABLE 13.2 (in millions) Three Months Ended 2022 2021 Stock-based compensation expense $ 9 $ 12 Tax benefit related to stock-based compensation expense 2 3 Fair value of units vested 3 1 As of March 31, 2022, there was $7.5 million of unrecognized compensation cost related to unvested restricted stock units, including $0.9 million that is subject to accelerated vesting under the Plan’s immediate vesting upon retirement. The components of the restricted stock units as of March 31, 2022 are as follows: TABLE 13.3 (dollars in millions) Service- Performance- Total Unvested restricted stock units 2,971,430 2,077,584 5,049,014 Unrecognized compensation expense $ 7 $ 1 $ 8 Intrinsic value $ 37 $ 26 $ 63 Weighted average remaining life (in years) 1.71 1.52 1.63 Stock Options All outstanding stock options were assumed from acquisitions and are fully vested. Upon consummation of our acquisitions, all outstanding stock options issued by the acquired companies were converted into equivalent FNB stock options. We issue shares of treasury stock or authorized but unissued shares to satisfy stock options exercised. As of March 31, 2022, we had 176,602 stock options outstanding and exercisable at a weighted average exercise price per share of $8.96, compared to 182,747 stock options outstanding and exercisable at a weighted average exercise price per share of $8.86 as of March 31, 2021. The intrinsic value of outstanding and exercisable stock options at March 31, 2022 was $0.6 million. The aggregate intrinsic value represents the amount by which the fair value of underlying stock exceeds the option exercise price.

INCOME TAXES

INCOME TAXES	3 Months Ended
	Mar. 31, 2022
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES Income Tax Expense Federal and state income tax expense and the statutory tax rate and the actual effective tax rate consist of the following: TABLE 14.1 Three Months Ended (dollars in millions) 2022 2021 Current income taxes: Federal taxes $ 7 $ 21 State taxes 2 2 Total current income taxes 9 23 Deferred income taxes: Federal taxes 5 (1) Total deferred income taxes 5 (1) Total income taxes $ 14 $ 22 Statutory tax rate 21.0 % 21.0 % Effective tax rate 20.9 18.9 The increase in the effective tax rate for the three months ended March 31, 2022 compared to 2021 was primarily due to higher state income taxes and nondeductible merger-related expenses resulting from the Howard acquisition. Deferred Income Taxes Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and tax purposes. Deferred tax assets and liabilities are measured based on the enacted tax rates that will apply in the years in which the temporary differences are expected to be recovered or paid. Net deferred tax assets were $103.5 million and $43.4 million at March 31, 2022 and December 31, 2021, respectively. The increase is due to the acquisition of net deferred taxes from Howard, as well as increases in the deferred tax asset related to unrealized losses on debt securities.

OTHER COMPREHENSIVE INCOME (LOS

OTHER COMPREHENSIVE INCOME (LOSS)	3 Months Ended
	Mar. 31, 2022
Equity [Abstract]
OTHER COMPREHENSIVE INCOME (LOSS)	OTHER COMPREHENSIVE INCOME (LOSS) The following table presents changes in AOCI, net of tax, by component: TABLE 15.1 (in millions) Unrealized Unrealized Unrecognized Total Three Months Ended March 31, 2022 Balance at beginning of period $ 8 $ (22) $ (48) $ (62) Other comprehensive (loss) income before reclassifications (128) (15) 1 (142) Amounts reclassified from AOCI — 2 — 2 Net current period other comprehensive (loss) income (128) (13) 1 (140) Balance at end of period $ (120) $ (35) $ (47) $ (202) The amounts reclassified from AOCI related to debt securities AFS are included in net securities gains on the Consolidated Statements of Income, while the amounts reclassified from AOCI related to derivative instruments in cash flow hedge programs are generally included in interest income on loans and leases on the Consolidated Statements of Income. The tax (benefit) expense amounts reclassified from AOCI in connection with the debt securities AFS and derivative instruments reclassifications are included in income taxes on the Consolidated Statements of Income.

EARNINGS PER COMMON SHARE

EARNINGS PER COMMON SHARE	3 Months Ended
	Mar. 31, 2022
Earnings Per Share [Abstract]
EARNINGS PER COMMON SHARE	EARNINGS PER COMMON SHARE Basic earnings per common share is calculated by dividing net income available to common stockholders by the weighted average number of shares of common stock outstanding net of unvested shares of restricted stock. Diluted earnings per common share is calculated by dividing net income available to common stockholders by the weighted average number of shares of common stock outstanding, adjusted for the dilutive effect of potential common shares issuable for stock options and restricted shares, as calculated using the treasury stock method. Adjustments to the weighted average number of shares of common stock outstanding are made only when such adjustments dilute earnings per common share. The following table sets forth the computation of basic and diluted earnings per common share: TABLE 16.1 Three Months Ended ( dollars in millions, except per share data) 2022 2021 Net income $ 53 $ 93 Less: Preferred stock dividends 2 2 Net income available to common stockholders $ 51 $ 91 Basic weighted average common shares outstanding 344,352,853 320,975,209 Net effect of dilutive stock options, warrants and restricted stock 4,573,193 3,769,650 Diluted weighted average common shares outstanding 348,926,046 324,744,859 Earnings per common share: Basic $ 0.15 $ 0.28 Diluted $ 0.15 $ 0.28 There were no anti-dilutive shares for the three months ended March 31, 2022 and 2021. In January 2022, we issued 34.1 million common shares as part of the Howard acquisition.

CASH FLOW INFORMATION

CASH FLOW INFORMATION	3 Months Ended
	Mar. 31, 2022
Supplemental Cash Flow Elements [Abstract]
CASH FLOW INFORMATION	CASH FLOW INFORMATION Following is a summary of supplemental cash flow information: TABLE 17.1 Three Months Ended (in millions) 2022 2021 Interest paid on deposits and other borrowings $ 21 $ 32 Income taxes paid — 5 Transfers of loans to other real estate owned 1 — We did not have any restricted cash as of March 31, 2022 and 2021. Supplemental non-cash information relating to the Howard acquisition is included in Note 3, Mergers and Acquisitions.

BUSINESS SEGMENTS

BUSINESS SEGMENTS	3 Months Ended
	Mar. 31, 2022
Segment Reporting [Abstract]
BUSINESS SEGMENTS	BUSINESS SEGMENTS We operate in three reportable segments: Community Banking, Wealth Management and Insurance. • The Community Banking segment provides commercial and consumer banking services. Commercial banking solutions include corporate banking, small business banking, investment real estate financing, business credit, capital markets and lease financing. Consumer banking products and services include deposit products, mortgage lending, consumer lending and a complete suite of mobile and online banking services. • The Wealth Management segment provides a broad range of personal and corporate fiduciary services including the administration of decedent and trust estates. In addition, it offers various alternative products, including securities brokerage (under a third-party arrangement) and investment advisory services, mutual funds and annuities. • The Insurance segment includes a full-service insurance brokerage service offering all lines of commercial and personal insurance through major carriers. The Insurance segment also includes a reinsurer. The following tables provide financial information for these segments of FNB. The information provided under the caption “Parent and Other” represents operations not considered to be reportable segments and/or general operating expenses of FNB, and includes the parent company, other non-bank subsidiaries and eliminations and adjustments to reconcile to the Consolidated Financial Statements. TABLE 18.1 (in millions) Community Wealth Insurance Parent and Consolidated At or for the Three Months Ended March 31, 2022 Interest income $ 253 $ — $ — $ 1 $ 254 Interest expense 17 — — 3 20 Net interest income 236 — — (2) 234 Provision for credit losses 17 — — 1 18 Non-interest income 56 16 7 (1) 78 Non-interest expense (1) 207 11 5 1 224 Amortization of intangibles 3 — — — 3 Income tax expense (benefit) 14 1 — (1) 14 Net income (loss) 51 4 2 (4) 53 Total assets 41,896 38 33 55 42,022 Total intangibles 2,457 9 27 — 2,493 At or for the Three Months Ended March 31, 2021 Interest income $ 251 $ — $ — $ — $ 251 Interest expense 25 — — 3 28 Net interest income 226 — — (3) 223 Provision for credit losses 6 — — — 6 Non-interest income 63 15 6 (1) 83 Non-interest expense (1) 165 10 5 2 182 Amortization of intangibles 3 — — — 3 Income tax expense (benefit) 22 1 — (1) 22 Net income (loss) 93 4 1 (5) 93 Total assets 38,360 40 34 41 38,475 Total intangibles 2,276 9 28 — 2,313 (1) Excludes amortization of intangibles, which is presented separately.

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS	3 Months Ended
	Mar. 31, 2022
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENTS	FAIR VALUE MEASUREMENTS Refer to Note 25 "Fair Value Measurements" to the Consolidated Financial Statements included in our 202 1 Annual Report on Form 10-K filed with the SEC on February 24, 2022 for a description of additional valuation methodologies for assets and liabilities measured at fair value on a recurring and non-recurring basis. The following table presents the balances of assets and liabilities measured at fair value on a recurring basis: TABLE 19.1 (in millions) Level 1 Level 2 Level 3 Total March 31, 2022 Assets Measured at Fair Value Debt securities available for sale U.S. Treasury $ 194 $ — $ — $ 194 U.S. government agencies — 141 — 141 U.S. government-sponsored entities — 204 — 204 Residential mortgage-backed securities: Agency mortgage-backed securities — 1,387 — 1,387 Agency collateralized mortgage obligations — 1,169 — 1,169 Commercial mortgage-backed securities — 308 — 308 States of the U.S. and political subdivisions (municipals) — 31 — 31 Other debt securities — 10 2 12 Total debt securities available for sale 194 3,250 2 3,446 Loans held for sale — 214 — 214 Derivative financial instruments Trading — 51 — 51 Not for trading — 9 — 9 Total derivative financial instruments — 60 — 60 Total assets measured at fair value on a recurring basis $ 194 $ 3,524 $ 2 $ 3,720 Liabilities Measured at Fair Value Derivative financial instruments Trading $ — $ 155 $ — $ 155 Not for trading — — 13 13 Total derivative financial instruments — 155 13 168 Total liabilities measured at fair value on a recurring basis $ — $ 155 $ 13 $ 168 (in millions) Level 1 Level 2 Level 3 Total December 31, 2021 Assets Measured at Fair Value Debt securities available for sale U.S. Treasury $ 204 $ — $ — $ 204 U.S. government agencies — 155 — 155 U.S. government-sponsored entities — 192 — 192 Residential mortgage-backed securities: Agency mortgage-backed securities — 1,357 — 1,357 Agency collateralized mortgage obligations — 1,186 — 1,186 Commercial mortgage-backed securities — 297 — 297 States of the U.S. and political subdivisions (municipals) — 33 — 33 Other debt securities — 2 — 2 Total debt securities available for sale 204 3,222 — 3,426 Loans held for sale — 269 — 269 Derivative financial instruments Trading — 174 — 174 Not for trading — 2 9 11 Total derivative financial instruments — 176 9 185 Total assets measured at fair value on a recurring basis $ 204 $ 3,667 $ 9 $ 3,880 Liabilities Measured at Fair Value Derivative financial instruments Trading $ — $ 44 $ — $ 44 Not for trading — 1 — 1 Total derivative financial instruments — 45 — 45 Total liabilities measured at fair value on a recurring basis $ — $ 45 $ — $ 45 The following table presents additional information about assets measured at fair value on a recurring basis and for which we have utilized Level 3 inputs to determine fair value: TABLE 19.2 (in millions) Other Interest Total Three Months Ended March 31, 2022 Balance at beginning of period $ — $ 9 $ 9 Purchases, issuances, sales and settlements: Purchases 2 — 2 Settlements — (9) (9) Balance at end of period $ 2 $ — $ 2 Year Ended December 31, 2021 Balance at beginning of period $ — $ 24 $ 24 Purchases, issuances, sales and settlements: Issuances — 9 9 Settlements — (24) (24) Balance at end of period $ — $ 9 $ 9 We review fair value hierarchy classifications on a quarterly basis. Changes in the observability of the valuation attributes may result in reclassification of certain financial assets or liabilities. Such reclassifications are reported as transfers in/out of Level 3 at fair value at the beginning of the period in which the changes occur. There were no transfers of assets or liabilities between the hierarchy levels during the first three months of 2022 or 2021. From time to time, we measure certain assets at fair value on a non-recurring basis. These adjustments to fair value usually result from the application of the lower of cost or fair value accounting or write-downs of individual assets. Valuation methodologies used to measure these fair value adjustments were described in Note 25, "Fair Value Measurements" to the Consolidated Financial Statements included in 2021 Annual Report on Form 10-K . For assets measured at fair value on a non-recurring basis still held at the Balance Sheet date, the following table provides the hierarchy level and the fair value of the related assets or portfolios: TABLE 19.3 (in millions) Level 1 Level 2 Level 3 Total March 31, 2022 Collateral dependent loans $ — $ — $ 25 $ 25 Other assets - MSRs — — 2 2 Other assets - SBA servicing asset — — 3 3 Other real estate owned — — 2 2 December 31, 2021 Collateral dependent loans $ — $ — $ 20 $ 20 Other assets - MSRs — — 10 10 Other assets - SBA servicing asset — — 3 3 Other real estate owned — — 2 2 The fair value amounts for collateral dependent loans and OREO in the table above were estimated at a date during the three months or twelve months ended March 31, 2022 and December 31, 2021, respectively. Consequently, the fair value information presented is not necessarily as of the period’s end. Collateral dependent loans measured or re-measured at fair value on a non-recurring basis during the three months ended March 31, 2022 had a carrying amount of $25.0 million, which includes an allocated ACL of $10.9 million. The ACL includes a provision applicable to the current period fair value measurements of $2.4 million, which was included in provision for credit losses for the three months ended March 31, 2022. MSRs measured at fair value on a non-recurring basis had a carrying value of $1.5 million, which included a valuation allowance of $0.2 million, as of March 31, 2022. The valuation allowance includes a recovery of $2.3 million included in earnings for the three months ended March 31, 2022. SBA servicing assets measured at fair value on a non-recurring basis had a carrying value of $3.1 million, which included a valuation allowance of $1.1 million, as of March 31, 2022. There was no recovery of the valuation allowance included in earnings for the three months ended March 31, 2022. OREO measured at fair value on a non-recurring basis during 2022 had a carrying amount of $1.9 million, which included a valuation allowance of $0.2 million, as of March 31, 2022. The valuation allowance includes a loss of $0.2 million, which was included in earnings for the three months ended March 31, 2022. Fair Value of Financial Instruments Refer to Note 25, "Fair Value Measurements" to the Consolidated Financial Statements included in our 2021 Annual Report on Form 10-K filed with the SEC on February 24, 2022 for a description of methods and assumptions that were used to estimate the fair value of each financial instrument. The fair values of our financial instruments are as follows: TABLE 19.4 Fair Value Measurements (in millions) Carrying Fair Level 1 Level 2 Level 3 March 31, 2022 Financial Assets Cash and cash equivalents $ 3,857 $ 3,857 $ 3,857 $ — $ — Debt securities available for sale 3,446 3,446 194 3,250 2 Debt securities held to maturity 3,513 3,364 — 3,359 5 Net loans and leases, including loans held for sale 26,721 26,076 — 214 25,862 Loan servicing rights 49 61 — — 61 Derivative assets 60 60 — 60 — Accrued interest receivable 80 80 80 — — Financial Liabilities Deposits 33,904 33,864 30,955 2,909 — Short-term borrowings 1,425 1,420 1,420 — — Long-term borrowings 713 722 — — 722 Derivative liabilities 168 168 — 155 13 Accrued interest payable 8 8 8 — — December 31, 2021 Financial Assets Cash and cash equivalents $ 3,493 $ 3,493 $ 3,493 $ — $ — Debt securities available for sale 3,426 3,426 204 3,222 — Debt securities held to maturity 3,463 3,506 — 3,506 — Net loans and leases, including loans held for sale 24,919 24,518 — 269 24,249 Loan servicing rights 47 49 — — 49 Derivative assets 185 185 — 176 9 Accrued interest receivable 76 76 76 — — Financial Liabilities Deposits 31,726 31,725 28,867 2,858 — Short-term borrowings 1,536 1,536 1,536 — — Long-term borrowings 682 704 — — 704 Derivative liabilities 45 45 — 45 — Accrued interest payable 10 10 10 — —

SUMMARY OF SIGNIFICANT ACCOUN_2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	3 Months Ended
	Mar. 31, 2022
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation Our accompanying Consolidated Financial Statements and these Notes to Consolidated Financial Statements (unaudited) include subsidiaries in which we have a controlling financial interest. We own and operate FNBPA, First National Trust Company, First National Investment Services Company, LLC, F.N.B. Investment Advisors, Inc., First National Insurance Agency, LLC, Bank Capital Services, LLC, F.N.B. Capital Corporation, LLC and Waubank Securities, LLC, and include results for each of these entities in the accompanying Consolidated Financial Statements. Companies in which we hold a controlling financial interest, or are a VIE in which we have the power to direct the activities of an entity that most significantly impact the entity’s economic performance and have an obligation to absorb losses or the right to receive benefits which could potentially be significant to the VIE, are consolidated. For a voting interest entity, a controlling financial interest is generally where we hold more than 50% of the outstanding voting shares. VIEs in which we do not hold the power to direct the activities of the entity that most significantly impact the entity’s economic performance or an obligation to absorb losses or the right to receive benefits which could potentially be significant to the VIE are not consolidated. Investments in companies that are not consolidated are accounted for using the equity method when we have the ability to exert significant influence or the cost method when we do not have the ability to exert significant influence. Investments in private investment partnerships that are accounted for under the equity method or the cost method are included in other assets and our proportional interest in the equity investments’ earnings are included in other non-interest income. Investment interests accounted for under the cost and equity methods are periodically evaluated for impairment. The accompanying interim unaudited Consolidated Financial Statements include all adjustments that are necessary, in the opinion of management, to fairly reflect our financial position and results of operations in accordance with GAAP. All significant intercompany balances and transactions have been eliminated. Certain prior period amounts have been reclassified to the current period presentation. Such reclassifications had no impact on our net income and stockholders' equity. Events occurring subsequent to March 31, 2022 have been evaluated for potential recognition or disclosure in the Consolidated Financial Statements through the date of the filing of the Consolidated Financial Statements with the SEC. Certain information and Note disclosures normally included in Consolidated Financial Statements prepared in accordance with GAAP have been condensed or omitted pursuant to the rules and regulations of the SEC. The interim operating results are not necessarily indicative of operating results FNB expects for the full year. These interim unaudited Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and Notes thereto included in our 2021 Annual Report on Form 10-K filed with the SEC on February 24, 2022.
Use of Estimates	Use of Estimates Our accounting and reporting policies conform with GAAP. The preparation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the amounts reported in the Consolidated Financial Statements and accompanying Notes to Consolidated Financial Statements (unaudited). Actual results could materially differ from those estimates. Material estimates that are particularly susceptible to significant changes include the ACL, fair value of financial instruments, goodwill and other intangible assets, income taxes and deferred tax assets and litigation reserves, which are listed in the critical accounting estimates. For a detailed description of our significant accounting policies and critical accounting estimates, see Note 1, "Summary of Significant Accounting Policies" and the "Application of Critical Accounting Policies" section in the MD&A, both in our 202 1 Annual Report on Form 10-K .
New Accounting Standards	The following table summarizes accounting pronouncements issued by the FASB that we recently adopted or will be adopting in the future. TABLE 2.1 Standard Description Financial Statements Impact Troubled Debt Restructuring and Charge-offs ASU 2022-02, Financial Instruments – Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures This Update eliminates the recognition and measurement guidance on TDRs for creditors that have adopted ASC 326 and requires enhanced disclosures about loan modifications for borrowers experiencing financial difficulty. This Update also requires public business entities to present current-period gross write-offs by year of origination in their vintage disclosures. This Update is to be applied using a prospective method. For the transition method related to TDRs, an entity has the option to apply a modified retrospective transition method. Early adoption of this Update is permitted. An entity is allowed to early adopt the amendments about TDRs and related disclosure enhancements separately from the amendments related to vintage disclosures. We are currently assessing the potential impact to our consolidated financial statements.

NEW ACCOUNTING STANDARDS (Table

NEW ACCOUNTING STANDARDS (Tables)	3 Months Ended
	Mar. 31, 2022
Accounting Changes and Error Corrections [Abstract]
Schedule of New Accounting Pronouncements and Changes in Accounting Principles	The following table summarizes accounting pronouncements issued by the FASB that we recently adopted or will be adopting in the future. TABLE 2.1 Standard Description Financial Statements Impact Troubled Debt Restructuring and Charge-offs ASU 2022-02, Financial Instruments – Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures This Update eliminates the recognition and measurement guidance on TDRs for creditors that have adopted ASC 326 and requires enhanced disclosures about loan modifications for borrowers experiencing financial difficulty. This Update also requires public business entities to present current-period gross write-offs by year of origination in their vintage disclosures. This Update is to be applied using a prospective method. For the transition method related to TDRs, an entity has the option to apply a modified retrospective transition method. Early adoption of this Update is permitted. An entity is allowed to early adopt the amendments about TDRs and related disclosure enhancements separately from the amendments related to vintage disclosures. We are currently assessing the potential impact to our consolidated financial statements.

MERGERS AND ACQUISITIONS (Table

MERGERS AND ACQUISITIONS (Tables)	3 Months Ended
	Mar. 31, 2022
Business Combination and Asset Acquisition [Abstract]
Amounts Recorded on Consolidated Balance Sheets in Conjunction with Acquisition	The merger was accounted for in accordance with the acquisition method of accounting. Preliminary fair values for all assets and liabilities are presented below. Determining the fair value of assets and liabilities is a complex process involving significant judgment regarding estimates and assumptions used to calculate fair values. Accordingly, the initial accounting for the merger is not complete. TABLE 3.1 (in millions) Howard Fair value of consideration paid $ 443 Fair value of identifiable assets acquired: Cash and cash equivalents 75 Securities 321 Loans 1,780 Core deposit and other intangible assets 19 Fixed and other assets 167 Total identifiable assets acquired 2,362 Fair value of liabilities assumed: Deposits 1,831 Borrowings 247 Other liabilities 13 Total liabilities assumed 2,091 Fair value of net identifiable assets acquired 271 Goodwill recognized $ 172

SECURITIES (Tables)

SECURITIES (Tables)	3 Months Ended
	Mar. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Schedule of Amortized Cost and Fair Value of Securities Available for Sale	The amortized cost and fair value of AFS debt securities are presented in the table below. There was no ACL in the AFS portfolio at March 31, 2022 and December 31, 2021. Accrued interest receivable on AFS debt securities totaled $6.9 million and $7.3 million at March 31, 2022 and December 31, 2021, respectively, and is excluded from the estimate of credit losses and assessed separately in other assets in the Consolidated Balance Sheets. Accordingly, we have excluded accrued interest receivable from both the fair value and the amortized cost basis of AFS debt securities. TABLE 4.1 (in millions) Amortized Gross Gross Fair Debt Securities AFS: March 31, 2022 U.S. Treasury $ 205 $ — $ (11) $ 194 U.S. government agencies 140 1 — 141 U.S. government-sponsored entities 214 — (10) 204 Residential mortgage-backed securities: Agency mortgage-backed securities 1,440 1 (54) 1,387 Agency collateralized mortgage obligations 1,236 — (67) 1,169 Commercial mortgage-backed securities 320 — (12) 308 States of the U.S. and political subdivisions (municipals) 33 — (2) 31 Other debt securities 12 — — 12 Total debt securities AFS $ 3,600 $ 2 $ (156) $ 3,446 (in millions) Amortized Gross Gross Fair Debt Securities AFS: December 31, 2021 U.S. Treasury $ 205 $ — $ (1) $ 204 U.S. government agencies 154 1 — 155 U.S. government-sponsored entities 194 — (2) 192 Residential mortgage-backed securities: Agency mortgage-backed securities 1,342 19 (4) 1,357 Agency collateralized mortgage obligations 1,192 11 (17) 1,186 Commercial mortgage-backed securities 294 5 (2) 297 States of the U.S. and political subdivisions (municipals) 33 — — 33 Other debt securities 2 — — 2 Total debt securities AFS $ 3,416 $ 36 $ (26) $ 3,426
Schedule of Amortized Cost and Fair Value of Securities Held to Maturity	The amortized cost and fair value of HTM debt securities are presented in the table below. The ACL for the HTM municipal bond portfolio was $0.12 million and $0.05 million at March 31, 2022 and December 31, 2021, respectively. Accrued interest receivable on HTM debt securities totaled $11.1 million and $12.3 million at March 31, 2022 and December 31, 2021, respectively, and is excluded from the estimate of credit losses and assessed separately in other assets in the Consolidated Balance Sheets. Accordingly, we have excluded accrued interest receivable from both the fair value and the amortized cost basis of HTM debt securities. TABLE 4.2 (in millions) Amortized Gross Gross Fair Debt Securities HTM: March 31, 2022 U.S. Treasury $ 1 $ — $ — $ 1 U.S. government agencies 1 — — 1 Residential mortgage-backed securities: Agency mortgage-backed securities 1,261 1 (53) 1,209 Agency collateralized mortgage obligations 943 — (55) 888 Commercial mortgage-backed securities 328 — (16) 312 States of the U.S. and political subdivisions (municipals) 974 4 (30) 948 Other debt securities 5 — — 5 Total debt securities HTM $ 3,513 $ 5 $ (154) $ 3,364 (in millions) Amortized Gross Gross Fair Debt Securities HTM: December 31, 2021 U.S. Treasury $ 1 $ — $ — $ 1 U.S. government agencies 1 — — 1 Residential mortgage-backed securities: Agency mortgage-backed securities 1,191 15 (5) 1,201 Agency collateralized mortgage obligations 930 5 (12) 923 Commercial mortgage-backed securities 323 3 (2) 324 States of the U.S. and political subdivisions (municipals) 1,017 39 — 1,056 Total debt securities HTM $ 3,463 $ 62 $ (19) $ 3,506
Amortized Cost and Fair Value of Securities, by Contractual Maturities	As of March 31, 2022, the amortized cost and fair value of debt securities, by contractual maturities, were as follows: TABLE 4.3 Available for Sale Held to Maturity (in millions) Amortized Fair Amortized Fair Due in one year or less $ 9 $ 9 $ 1 $ 1 Due after one year but within five years 434 412 23 23 Due after five years but within ten years 106 105 141 137 Due after ten years 55 56 816 794 604 582 981 955 Residential mortgage-backed securities: Agency mortgage-backed securities 1,440 1,387 1,261 1,209 Agency collateralized mortgage obligations 1,236 1,169 943 888 Commercial mortgage-backed securities 320 308 328 312 Total debt securities $ 3,600 $ 3,446 $ 3,513 $ 3,364
Schedule of Securities Pledged as Collateral	Following is information relating to securities pledged: TABLE 4.4 (dollars in millions) March 31, December 31, Securities pledged (carrying value): To secure public deposits, trust deposits and for other purposes as required by law $ 5,712 $ 5,660 As collateral for short-term borrowings 403 392 Securities pledged as a percent of total securities 87.9 % 87.9 %
Summaries of Fair Values and Unrealized Losses of Impaired Securities, Segregated by Length of Impairment	Following are summaries of the fair values of AFS debt securities in an unrealized loss position for which an ACL has not been recorded, segregated by security type and length of continuous loss position: TABLE 4.5 Less than 12 Months 12 Months or More Total (dollars in millions) # Fair Unrealized # Fair Unrealized # Fair Unrealized Debt Securities AFS March 31, 2022 U.S. Treasury 4 $ 194 $ (11) — $ — $ — 4 $ 194 $ (11) U.S. government agencies 6 50 — 9 7 — 15 57 — U.S. government-sponsored entities 11 181 (8) 1 23 (2) 12 204 (10) Residential mortgage-backed securities: Agency mortgage-backed securities 101 1,346 (54) — — — 101 1,346 (54) Agency collateralized mortgage obligations 60 952 (49) 7 196 (18) 67 1,148 (67) Commercial mortgage-backed securities 11 250 (10) 2 31 (2) 13 281 (12) States of the U.S. and political subdivisions (municipals) 12 27 (1) 1 3 (1) 13 30 (2) Other debt securities 5 6 — 1 2 — 6 8 — Total 210 $ 3,006 $ (133) 21 $ 262 $ (23) 231 $ 3,268 $ (156) Less than 12 Months 12 Months or More Total (dollars in millions) # Fair Unrealized # Fair Unrealized # Fair Unrealized Debt Securities AFS December 31, 2021 U.S. Treasury 3 $ 151 $ (1) — $ — $ — 3 $ 151 $ (1) U.S. government agencies 3 22 — 9 8 — 12 30 — U.S. government-sponsored entities 3 99 (1) 1 24 (1) 4 123 (2) Residential mortgage-backed securities: Agency mortgage-backed securities 13 599 (4) — — — 13 599 (4) Agency collateralized mortgage obligations 23 659 (15) 3 68 (2) 26 727 (17) Commercial mortgage-backed securities 5 125 (2) — — — 5 125 (2) States of the U.S. and political subdivisions 10 24 — — — — 10 24 — Other debt securities — — — 1 2 — 1 2 — Total 60 $ 1,679 $ (23) 14 $ 102 $ (3) 74 $ 1,781 $ (26)

LOANS AND LEASES (Tables)

LOANS AND LEASES (Tables)	3 Months Ended
	Mar. 31, 2022
Receivables [Abstract]
Summary of Loans and Leases, Net of Unearned Income	Following is a summary of total loans and leases, net of unearned income: TABLE 5.1 (in millions) March 31, 2022 December 31, 2021 Commercial real estate $ 10,746 $ 9,899 Commercial and industrial 6,220 5,977 Commercial leases 471 495 Other 144 94 Total commercial loans and leases 17,581 16,465 Direct installment 2,568 2,376 Residential mortgages 4,188 3,654 Indirect installment 1,216 1,227 Consumer lines of credit 1,286 1,246 Total consumer loans 9,258 8,503 Total loans and leases, net of unearned income $ 26,839 $ 24,968
Certain Information Relating to Commercial Real Estate Loans	The following table shows occupancy information relating to commercial real estate loans: TABLE 5.2 (dollars in millions) March 31, December 31, Commercial real estate: Percent owner-occupied 29.3 % 28.8 % Percent non-owner-occupied 70.7 71.2
Summary of Loan, Credit Quality Indicators	We use an internal risk rating assigned to a commercial loan or lease at origination, summarized below. TABLE 5.3 Rating Category Definition Pass in general, the condition of the borrower and the performance of the loan is satisfactory or better Special Mention in general, the condition of the borrower has deteriorated, requiring an increased level of monitoring Substandard in general, the condition of the borrower has significantly deteriorated and the performance of the loan could further deteriorate if deficiencies are not corrected Doubtful in general, the condition of the borrower has significantly deteriorated and the collection in full of both principal and interest is highly questionable or improbable
Schedule of Financing Receivables, Originated Year	The following tables summarize the designated loan rating category by loan class including term loans on an amortized cost basis by origination year: TABLE 5.4 March 31, 2022 2022 2021 2020 2019 2018 Prior Revolving Loans Amortized Cost Basis Total (in millions) COMMERCIAL Commercial Real Estate: Risk Rating: Pass $ 423 $ 2,123 $ 1,813 $ 1,480 $ 839 $ 2,937 $ 196 $ 9,811 Special Mention — 44 24 93 101 306 1 569 Substandard — — 16 43 54 244 9 366 Total commercial real estate 423 2,167 1,853 1,616 994 3,487 206 10,746 Commercial and Industrial: Risk Rating: Pass 426 1,444 823 697 390 475 1,576 5,831 Special Mention 1 7 16 18 28 101 32 203 Substandard — 8 11 14 26 62 65 186 Total commercial and industrial 427 1,459 850 729 444 638 1,673 6,220 Commercial Leases: Risk Rating: Pass 22 165 98 48 40 90 — 463 Special Mention — 1 — — — — — 1 Substandard — — 2 2 — 3 — 7 Total commercial leases 22 166 100 50 40 93 — 471 Other Commercial: Risk Rating: Pass 57 — — — — 15 72 144 Total other commercial 57 — — — — 15 72 144 Total commercial loans and leases 929 3,792 2,803 2,395 1,478 4,233 1,951 17,581 CONSUMER Direct Installment: Current 265 983 523 197 112 475 — 2,555 Past due — — 1 1 1 10 — 13 Total direct installment 265 983 524 198 113 485 — 2,568 Residential Mortgages: Current 237 1,470 929 418 152 935 — 4,141 Past due — 4 4 2 3 34 — 47 Total residential mortgages 237 1,474 933 420 155 969 — 4,188 Indirect Installment: Current 127 478 235 137 149 78 — 1,204 Past due — 5 2 2 1 2 — 12 Total indirect installment 127 483 237 139 150 80 — 1,216 Consumer Lines of Credit: Current 32 20 2 4 5 133 1,075 1,271 Past due — — — — — 13 2 15 Total consumer lines of credit 32 20 2 4 5 146 1,077 1,286 Total consumer loans 661 2,960 1,696 761 423 1,680 1,077 9,258 Total loans and leases $ 1,590 $ 6,752 $ 4,499 $ 3,156 $ 1,901 $ 5,913 $ 3,028 $ 26,839 December 31, 2021 2021 2020 2019 2018 2017 Prior Revolving Loans Amortized Cost Basis Total (in millions) COMMERCIAL Commercial Real Estate: Risk Rating: Pass $ 1,878 $ 1,782 $ 1,503 $ 830 $ 743 $ 2,171 $ 183 $ 9,090 Special Mention 15 21 89 105 107 175 9 521 Substandard — 15 28 45 45 152 3 288 Total commercial real estate 1,893 1,818 1,620 980 895 2,498 195 9,899 Commercial and Industrial: Risk Rating: Pass 1,663 833 731 386 184 296 1,509 5,602 Special Mention 8 12 18 7 37 42 52 176 Substandard 1 4 14 57 42 17 64 199 Total commercial and industrial 1,672 849 763 450 263 355 1,625 5,977 Commercial Leases: Risk Rating: Pass 182 109 98 53 39 1 — 482 Special Mention — 1 — 2 3 1 — 7 Substandard — 2 3 1 — — — 6 Total commercial leases 182 112 101 56 42 2 — 495 Other Commercial: Risk Rating: Pass 39 — — — — 3 52 94 Total other commercial 39 — — — — 3 52 94 Total commercial loans and leases 3,786 2,779 2,484 1,486 1,200 2,858 1,872 16,465 CONSUMER Direct Installment: Current 978 538 215 125 96 412 — 2,364 Past due — — 1 1 — 10 — 12 Total direct installment 978 538 216 126 96 422 — 2,376 Residential Mortgages: Current 1,280 932 392 152 212 652 — 3,620 Past due 1 1 1 3 3 25 — 34 Total residential mortgages 1,281 933 393 155 215 677 — 3,654 Indirect Installment: Current 516 262 157 178 64 35 — 1,212 Past due 6 3 2 2 1 1 — 15 Total indirect installment 522 265 159 180 65 36 — 1,227 Consumer Lines of Credit: Current 20 3 4 5 3 127 1,072 1,234 Past due — — — — — 10 2 12 Total consumer lines of credit 20 3 4 5 3 137 1,074 1,246 Total consumer loans 2,801 1,739 772 466 379 1,272 1,074 8,503 Total loans and leases $ 6,587 $ 4,518 $ 3,256 $ 1,952 $ 1,579 $ 4,130 $ 2,946 $ 24,968
Age Analysis of Past Due Loans, by Class	The following tables provide an analysis of the aging of loans by class. TABLE 5.5 (in millions) 30-89 Days > 90 Days Past Due and Still Accruing Non- Total Current Total Non-accrual with No ACL March 31, 2022 Commercial real estate $ 16 $ — $ 53 $ 69 $ 10,677 $ 10,746 $ 26 Commercial and industrial 6 — 12 18 6,202 6,220 1 Commercial leases — — 1 1 470 471 — Other 2 — 1 3 141 144 — Total commercial loans and leases 24 — 67 91 17,490 17,581 27 Direct installment 6 — 7 13 2,555 2,568 — Residential mortgages 21 6 20 47 4,141 4,188 — Indirect installment 10 — 2 12 1,204 1,216 — Consumer lines of credit 7 2 6 15 1,271 1,286 — Total consumer loans 44 8 35 87 9,171 9,258 — Total loans and leases $ 68 $ 8 $ 102 $ 178 $ 26,661 $ 26,839 $ 27 (in millions) 30-89 Days > 90 Days Past Due and Still Accruing Non- Total Current Total Non-accrual with No ACL December 31, 2021 Commercial real estate $ 11 $ — $ 48 $ 59 $ 9,840 $ 9,899 $ 20 Commercial and industrial 4 — 15 19 5,958 5,977 4 Commercial leases 1 — 1 2 493 495 — Other — — — — 94 94 — Total commercial loans and leases 16 — 64 80 16,385 16,465 24 Direct installment 5 — 7 12 2,364 2,376 — Residential mortgages 20 4 10 34 3,620 3,654 — Indirect installment 12 1 2 15 1,212 1,227 — Consumer lines of credit 6 1 5 12 1,234 1,246 — Total consumer loans 43 6 24 73 8,430 8,503 — Total loans and leases $ 59 $ 6 $ 88 $ 153 $ 24,815 $ 24,968 $ 24
Summary of Non-Performing Assets	Following is a summary of non-performing assets: TABLE 5.6 (dollars in millions) March 31, December 31, Non-accrual loans $ 102 $ 88 Total non-performing loans 102 88 Other real estate owned 8 8 Total non-performing assets $ 110 $ 96 Asset quality ratios: Non-performing loans / total loans and leases 0.38 % 0.35 % Non-performing assets + 90 days past due / total loans and leases + OREO 0.44 0.41
Summary of the Composition of Total TDRs	Following is a summary of the composition of total TDRs: TABLE 5.7 (in millions) March 31, December 31, Accruing $ 60 $ 60 Non-accrual 32 32 Total TDRs $ 92 $ 92
Summary of Troubled Debt Restructurings by Class of Loans	Following is a summary of TDR loans, by class, for loans that were modified during the periods indicated: TABLE 5.8 Three Months Ended March 31, 2022 (dollars in millions) Number Pre- Post- Commercial real estate 2 $ — $ — Total commercial loans 2 — — Direct installment 13 — — Residential mortgages 5 1 1 Consumer lines of credit 3 — — Total consumer loans 21 1 1 Total 23 $ 1 $ 1 Three Months Ended March 31, 2021 (dollars in millions) Number Pre- Post- Commercial real estate 11 $ 17 $ 17 Commercial and industrial 1 — — Total commercial loans 12 17 17 Direct installment 10 — — Residential mortgages 2 1 1 Consumer lines of credit 10 1 1 Total consumer loans 22 2 2 Total 34 $ 19 $ 19
Summary of Troubled Debt Restructurings by Class of Loans and Leases, Payment Default	Following is a summary of TDRs, by class, for which there was a payment default, excluding loans that have been paid off and/or sold. Default occurs when a loan is 90 days or more past due and is within 12 months of restructuring. TABLE 5.9 Three Months Ended (dollars in millions) Number of Recorded Commercial real estate 3 $ — Total commercial loans 3 — Direct installment 1 — Residential mortgages 1 — Total consumer loans 2 — Total 5 $ — Three Months Ended (dollars in millions) Number of Recorded Commercial and industrial 1 $ — Total commercial loans 1 — Residential mortgages 1 — Total consumer loans 1 — Total 2 $ —

ALLOWANCE FOR CREDIT LOSSES O_2

ALLOWANCE FOR CREDIT LOSSES ON LOANS AND LEASES (Tables)	3 Months Ended
	Mar. 31, 2022
Receivables [Abstract]
Summary of Changes in Allowance for Credit Losses by Loan and Lease Class	Following is a summary of changes in the ACL, by loan and lease class: TABLE 6.1 (in millions) Balance at Charge- Recoveries Net Provision for Credit Losses Allowance for PCD Loans and Leases at Acquisition Balance at Three Months Ended March 31, 2022 Commercial real estate $ 156.5 $ (1.0) $ 1.4 $ 0.4 $ 4.4 $ 4.4 $ 165.7 Commercial and industrial 87.4 (3.2) 1.3 (1.9) 2.8 3.4 91.7 Commercial leases 14.7 (0.1) — (0.1) (0.8) — 13.8 Other 2.6 (0.7) 0.2 (0.5) 1.7 — 3.8 Total commercial loans and leases 261.2 (5.0) 2.9 (2.1) 8.1 7.8 275.0 Direct installment 26.4 — 0.2 0.2 4.1 0.5 31.2 Residential mortgages 33.1 (0.1) 0.2 0.1 5.2 1.3 39.7 Indirect installment 13.5 (1.0) 0.7 (0.3) 1.0 — 14.2 Consumer lines of credit 10.1 (0.2) 0.4 0.2 (0.2) 0.4 10.5 Total consumer loans 83.1 (1.3) 1.5 0.2 10.1 2.2 95.6 Total allowance for credit losses on loans and leases 344.3 (6.3) 4.4 (1.9) 18.2 10.0 370.6 Allowance for unfunded loan commitments 19.1 — — — (0.3) — 18.8 Total allowance for credit losses on loans and leases and allowance for unfunded loan commitments $ 363.4 $ (6.3) $ 4.4 $ (1.9) $ 17.9 $ 10.0 $ 389.4 (in millions) Balance at Charge- Recoveries Net Provision Balance at Three Months Ended March 31, 2021 Commercial real estate $ 181 $ (1) $ 1 $ — $ 3 $ 184 Commercial and industrial 81 (8) 1 (7) 5 79 Commercial leases 17 — 1 1 (1) 17 Other 1 (1) 1 — — 1 Total commercial loans and leases 280 (10) 4 (6) 7 281 Direct installment 26 — — — — 26 Residential mortgages 34 — — — (2) 32 Indirect installment 11 (2) 1 (1) 1 11 Consumer lines of credit 12 — — — — 12 Total consumer loans 83 (2) 1 (1) (1) 81 Total allowance for credit losses on loans and leases 363 (12) 5 (7) 6 362 Allowance for unfunded loan commitments 14 — — — — 14 Total allowance for credit losses on loans and leases and allowance for unfunded loan commitments $ 377 $ (12) $ 5 $ (7) $ 6 $ 376 Following is a summary of changes in the AULC by portfolio segment: TABLE 6.2 Three Months Ended 2022 2021 (in millions) Balance at beginning of period $ 19 $ 14 Provision for unfunded loan commitments and letters of credit: Commercial portfolio — — Consumer portfolio — — Balance at end of period $ 19 $ 14

LOAN SERVICING (Tables)

LOAN SERVICING (Tables) - Mortgage Servicing Rights	3 Months Ended
	Mar. 31, 2022
Servicing Assets at Fair Value [Line Items]
Servicing Asset at Amortized Cost	The unpaid principal balance of mortgage loans serviced for others is listed below: TABLE 7.1 (in millions) March 31, December 31, Mortgage loans sold with servicing retained $ 4,985 $ 4,855 The following table summarizes activity relating to mortgage loans sold with servicing retained: TABLE 7.2 Three Months Ended (in millions) 2022 2021 Mortgage loans sold with servicing retained $ 351 $ 506 Pretax net gains resulting from above loan sales (1) 1 17 Mortgage servicing fees (1) 3 3 (1) Recorded in mortgage banking operations on the Consolidated Statements of Income. Following is a summary of activity relating to MSRs: TABLE 7.3 Three Months Ended (in millions) 2022 2021 Balance at beginning of period $ 44.4 $ 35.6 Additions 4.1 5.2 Payoffs and curtailments (1.6) (4.1) (Impairment charge) / recovery 2.3 2.5 Amortization (0.7) (0.6) Balance at end of period $ 48.5 $ 38.6 Fair value, beginning of period $ 46.0 $ 35.6 Fair value, end of period 58.2 40.2
Schedule of Assumptions for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement	Following is a summary of the sensitivity of the fair value of MSRs to changes in key assumptions: TABLE 7.4 (dollars in millions) March 31, December 31, Weighted average life (months) 89.9 76.6 Constant prepayment rate (annualized) 8.4 % 11.2 % Discount rate 9.5 % 9.5 % Effect on fair value due to change in interest rates: +2.00% $ 11 $ 15 +1.00% 6 9 +0.50% 4 5 +0.25% 2 3 -0.25% (3) (3) -0.50% (6) (7)

LEASES (Tables)

LEASES (Tables)	3 Months Ended
	Mar. 31, 2022
Leases [Abstract]
Lease, Cost	The components of lease expense were as follows: TABLE 8.1 Three Months Ended (dollars in millions) 2022 2021 Operating lease cost $ 8 $ 7 Variable lease cost 1 1 Total lease cost $ 9 $ 8
Leases, Other Information	Other information related to leases is as follows: TABLE 8.2 Three Months Ended (dollars in millions) 2022 2021 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 7 $ 7 Operating cash flows from finance leases $ — $ — Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 2 $ — Finance leases $ 4 $ — Weighted average remaining lease term (years): Operating leases 9.69 9.39 Finance leases 23.08 0 Weighted average discount rate: Operating leases 2.4 % 2.6 % Finance leases 2.0 % — %
Lessee, Operating Lease, Liability, Maturity	Maturities of lease liabilities were as follows: TABLE 8.3 (in millions) Operating Leases Finance Leases Total Leases March 31, 2022 2022 $ 20 $ — $ 20 2023 23 1 24 2024 21 1 22 2025 15 1 16 2026 12 1 13 Later years 75 16 91 Total lease payments 166 20 186 Less: imputed interest (20) (4) (24) Present value of lease liabilities $ 146 $ 16 $ 162
Finance Lease, Liability, Fiscal Year Maturity	Maturities of lease liabilities were as follows: TABLE 8.3 (in millions) Operating Leases Finance Leases Total Leases March 31, 2022 2022 $ 20 $ — $ 20 2023 23 1 24 2024 21 1 22 2025 15 1 16 2026 12 1 13 Later years 75 16 91 Total lease payments 166 20 186 Less: imputed interest (20) (4) (24) Present value of lease liabilities $ 146 $ 16 $ 162

VARIABLE INTEREST ENTITIES (Tab

VARIABLE INTEREST ENTITIES (Tables)	3 Months Ended
	Mar. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Variable Interest Entities, Assets and Liabilities	The following table provides a summary of the assets and liabilities included in our Consolidated Financial Statements, as well as the maximum exposure to losses, associated with our interests related to VIEs for which we hold an interest, but are not the primary beneficiary, at March 31, 2022 and December 31, 2021. TABLE 9.1 (in millions) Total Assets Total Liabilities Maximum Exposure to Loss March 31, 2022 Trust preferred securities (1) $ 1 $ 67 $ — Affordable housing tax credit partnerships 118 31 118 Other investments 32 5 32 Total $ 151 $ 103 $ 150 December 31, 2021 Trust preferred securities (1) $ 1 $ 67 $ — Affordable housing tax credit partnerships 121 34 121 Other investments 28 6 28 Total $ 150 $ 107 $ 149 (1) Represents our investment in unconsolidated subsidiaries.
Low Income Housing Tax Credits, Balances Of Affordable Housing Tax Credit Investments And Related Unfunded Commitments	The following table presents the balances of our affordable housing tax credit investments and related unfunded commitments: TABLE 9.2 (in millions) March 31, December 31, LIHTC investments included in other assets $ 87 $ 87 Unfunded LIHTC commitments 31 34
Low Income Housing Tax Credits, Income Statement Effect	The following table summarizes the impact of these LIHTC investments on the provision for income taxes in our Consolidated Statements of Income: TABLE 9.3 Three Months Ended (in millions) 2022 2021 Provision for income taxes: Amortization of LIHTC investments under proportional method $ 4 $ 3 Low-income housing tax credits (4) (3) Other tax benefits related to tax credit investments (1) (1) Total impact on provision for income taxes $ (1) $ (1)

BORROWINGS (Tables)

BORROWINGS (Tables)	3 Months Ended
	Mar. 31, 2022
Debt Disclosure [Abstract]
Summary of Short-Term Borrowings	Following is a summary of short-term borrowings: TABLE 10.1 (in millions) March 31, December 31, Securities sold under repurchase agreements $ 363 $ 376 Federal Home Loan Bank advances 930 1,030 Subordinated notes 132 130 Total short-term borrowings $ 1,425 $ 1,536
Summary of Long-Term Borrowings	Following is a summary of long-term borrowings: TABLE 10.2 (in millions) March 31, December 31, Senior notes $ 299 $ 299 Subordinated notes 68 68 Junior subordinated debt 72 67 Other subordinated debt 274 248 Total long-term borrowings $ 713 $ 682
Schedule of Other Subordinated Debt	The subordinated notes are eligible for treatment as tier 2 capital for regulatory capital purposes. TABLE 10.3 (dollars in millions) Aggregate Principal Amount Issued Net Proceeds (4) Carrying Value Stated Maturity Date Interest 2.20% Senior Notes due February 24, 2023 $ 300 $ 298 $ 299 2/24/2023 2.20 % 4.95% Fixed-To-Floating Rate Subordinated Notes due 2029 (1) 120 118 119 2/14/2029 4.95 % 4.875% Subordinated Notes due 2025 100 98 99 10/2/2025 4.875 % 7.625% Subordinated Notes due August 12, 2023 (3) 38 46 30 8/12/2023 7.625 % 6.00% Fixed-To-Floating Rate Subordinated Notes due December 6, 2028 (2) (3) 25 26 26 12/6/2028 6.00 % Total $ 583 $ 586 $ 573 (1) Fixed-to-floating rate until February 14, 2024, at which time the floating rate will be three-month LIBOR plus 240 basis points (bps), or an alternative rate that may replace LIBOR, as specified in the prospectus for this offering. (2) Fixed-to-floating rate until December 6, 2023, at which time the floating rate will be three-month LIBOR plus 302 bps, or an alternative rate that may replace LIBOR, as specified in the prospectus for this offering. (3) Assumed from an acquisition and adjusted to fair value at the time of acquisition. (4) After deducting underwriting discounts and commissions and offering costs. For the debt assumed from acquisitions, this is the fair value of the debt at the time of the acquisition.
Schedule of Junior Subordinated Debt Trusts	The following table provides information relating to the Trusts as of March 31, 2022: TABLE 10.4 (dollars in millions) Trust Common Junior Stated Interest Rate Rate Reset Factor F.N.B. Statutory Trust II $ 22 $ 1 $ 22 6/15/2036 2.48 % LIBOR + 165 bps Yadkin Valley Statutory Trust I 25 1 22 12/15/2037 2.15 % LIBOR + 132 bps FNB Financial Services Capital Trust I 25 1 23 9/30/2035 2.46 % LIBOR + 146 bps Patapsco Statutory Trust I 5 — 5 12/15/2035 2.31 % LIBOR + 148 bps Total $ 77 $ 3 $ 72

DERIVATIVE INSTRUMENTS AND HE_2

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Tables)	3 Months Ended
	Mar. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Notional Amounts and Gross Fair Values of Derivative Assets and Derivative Liabilities	The following table presents notional amounts and gross fair values of our derivative assets and derivative liabilities which are not offset in the Consolidated Balance Sheets: TABLE 11.1 March 31, 2022 December 31, 2021 Notional Fair Value Notional Fair Value (in millions) Amount Asset Liability Amount Asset Liability Gross Derivatives Subject to master netting arrangements: Interest rate contracts – designated $ 1,980 $ — $ — $ 2,080 $ 1 $ — Interest rate swaps – not designated 5,469 14 10 5,547 2 20 Total subject to master netting arrangements 7,449 14 10 7,627 3 20 Not subject to master netting arrangements: Interest rate swaps – not designated 5,469 37 145 5,547 172 24 Interest rate lock commitments – not designated 381 — 13 482 9 — Forward delivery commitments – not designated 435 9 — 502 1 1 Credit risk contracts – not designated 364 — — 368 — — Total not subject to master netting arrangements 6,649 46 158 6,899 182 25 Total $ 14,098 $ 60 $ 168 $ 14,526 $ 185 $ 45
Summary of Amounts Reclassified from Accumulated Other Comprehensive Income (AOCI)	The following table shows amounts reclassified from AOCI: TABLE 11.2 Amount of Gain (Loss) Recognized in OCI on Derivatives Location of Gain (Loss) Reclassified from AOCI into Income Amount of Gain (Loss) Reclassified from AOCI into Income Three Months Ended Three Months Ended (in millions) 2022 2021 2022 2021 Derivatives in cash flow hedging relationships: Interest rate contracts $ (19) $ 5 Interest income (expense) $ (2) $ (5) Other income — —
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss)	The following table represents gains (losses) recognized in the Consolidated Statements of Income on cash flow hedging relationships: TABLE 11.3 Three months ended March 31, 2022 2021 (in millions) Interest Income - Loans and Leases Interest Expense - Short-Term Borrowings Interest Income - Loans and Leases Interest Expense - Short-Term Borrowings Total amounts of income and expense line items presented in the Consolidated Statements of Income (the effects of cash flow hedges are included in these line items) $ 221 $ 6 $ 221 $ 7 The effects of cash flow hedging: Gain (loss) on cash flow hedging relationships: Interest rate contracts: Amount of gain (loss) reclassified from AOCI into net income 2 (4) — (5)
Schedule of Derivative Financial Instruments on the Consolidated Statements of Income	The following table presents the effect of certain derivative financial instruments on the Consolidated Statements of Income: TABLE 11.4 Three Months Ended (in millions) Consolidated Statements of Income Location 2022 2021 Interest rate swaps Non-interest income - other $ — $ — Interest rate lock commitments Mortgage banking operations — — Forward delivery contracts Mortgage banking operations 9 9 Credit risk contracts Non-interest income - other — —
Schedule of Offsetting Assets and Liabilities	The following table presents a reconciliation of the net amounts of derivative assets and derivative liabilities presented in the Consolidated Balance Sheets to the net amounts that would result in the event of offset: TABLE 11.5 Amount Not Offset in the (in millions) Net Amount Financial Cash Net March 31, 2022 Derivative Assets Interest rate contracts: Not designated $ 14 $ — $ 14 $ — Total $ 14 $ — $ 14 $ — Derivative Liabilities Interest rate contracts: Not designated $ 10 $ — $ 10 $ — Total $ 10 $ — $ 10 $ — December 31, 2021 Derivative Assets Interest rate contracts: Designated $ 1 $ — $ 1 $ — Not designated 2 — 2 — Total $ 3 $ — $ 3 $ — Derivative Liabilities Interest rate contracts: Not designated $ 20 $ — $ 20 $ — Total $ 20 $ — $ 20 $ —

COMMITMENTS, CREDIT RISK AND _2

COMMITMENTS, CREDIT RISK AND CONTINGENCIES (Tables)	3 Months Ended
	Mar. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Summary of Off-Balance Sheet Credit Risk Information	Following is a summary of off-balance sheet credit risk information: TABLE 12.1 (in millions) March 31, December 31, Commitments to extend credit $ 12,069 $ 11,228 Standby letters of credit 204 194

STOCK INCENTIVE PLANS (Tables)

STOCK INCENTIVE PLANS (Tables)	3 Months Ended
	Mar. 31, 2022
Share-based Payment Arrangement [Abstract]
Summary of Activity Relating to Restricted Stock Units	The following table summarizes the activity relating to restricted stock units during the periods indicated: TABLE 13.1 Three Months Ended March 31, 2022 2021 Units Weighted Units Weighted Unvested units outstanding at beginning of period 4,680,786 $ 9.71 4,322,115 $ 9.46 Granted 495,844 14.22 542,136 12.61 Acquired 60,300 9.41 — — Net adjustment due to performance — — 327,256 11.84 Vested (216,373) 8.77 (142,687) 7.29 Forfeited/expired/canceled (18,239) 9.34 (8,334) 7.52 Dividend reinvestment 46,696 12.85 42,310 13.43 Unvested units outstanding at end of period 5,049,014 10.22 5,082,796 10.05
Schedule of Certain Information Related to Restricted Stock Units	The following table provides certain information related to restricted stock units: TABLE 13.2 (in millions) Three Months Ended 2022 2021 Stock-based compensation expense $ 9 $ 12 Tax benefit related to stock-based compensation expense 2 3 Fair value of units vested 3 1
Components of Restricted Stock Units	The components of the restricted stock units as of March 31, 2022 are as follows: TABLE 13.3 (dollars in millions) Service- Performance- Total Unvested restricted stock units 2,971,430 2,077,584 5,049,014 Unrecognized compensation expense $ 7 $ 1 $ 8 Intrinsic value $ 37 $ 26 $ 63 Weighted average remaining life (in years) 1.71 1.52 1.63

INCOME TAXES (Tables)

INCOME TAXES (Tables)	3 Months Ended
	Mar. 31, 2022
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit)	Federal and state income tax expense and the statutory tax rate and the actual effective tax rate consist of the following: TABLE 14.1 Three Months Ended (dollars in millions) 2022 2021 Current income taxes: Federal taxes $ 7 $ 21 State taxes 2 2 Total current income taxes 9 23 Deferred income taxes: Federal taxes 5 (1) Total deferred income taxes 5 (1) Total income taxes $ 14 $ 22 Statutory tax rate 21.0 % 21.0 % Effective tax rate 20.9 18.9

OTHER COMPREHENSIVE INCOME (L_2

OTHER COMPREHENSIVE INCOME (LOSS) (Tables)	3 Months Ended
	Mar. 31, 2022
Equity [Abstract]
Changes in AOCI, Net of Tax, by Component	The following table presents changes in AOCI, net of tax, by component: TABLE 15.1 (in millions) Unrealized Unrealized Unrecognized Total Three Months Ended March 31, 2022 Balance at beginning of period $ 8 $ (22) $ (48) $ (62) Other comprehensive (loss) income before reclassifications (128) (15) 1 (142) Amounts reclassified from AOCI — 2 — 2 Net current period other comprehensive (loss) income (128) (13) 1 (140) Balance at end of period $ (120) $ (35) $ (47) $ (202)

EARNINGS PER COMMON SHARE (Tabl

EARNINGS PER COMMON SHARE (Tables)	3 Months Ended
	Mar. 31, 2022
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings Per Common Share	The following table sets forth the computation of basic and diluted earnings per common share: TABLE 16.1 Three Months Ended ( dollars in millions, except per share data) 2022 2021 Net income $ 53 $ 93 Less: Preferred stock dividends 2 2 Net income available to common stockholders $ 51 $ 91 Basic weighted average common shares outstanding 344,352,853 320,975,209 Net effect of dilutive stock options, warrants and restricted stock 4,573,193 3,769,650 Diluted weighted average common shares outstanding 348,926,046 324,744,859 Earnings per common share: Basic $ 0.15 $ 0.28 Diluted $ 0.15 $ 0.28

CASH FLOW INFORMATION (Tables)

CASH FLOW INFORMATION (Tables)	3 Months Ended
	Mar. 31, 2022
Supplemental Cash Flow Elements [Abstract]
Summary of Supplemental Cash Flow Information	Following is a summary of supplemental cash flow information: TABLE 17.1 Three Months Ended (in millions) 2022 2021 Interest paid on deposits and other borrowings $ 21 $ 32 Income taxes paid — 5 Transfers of loans to other real estate owned 1 —

BUSINESS SEGMENTS (Tables)

BUSINESS SEGMENTS (Tables)	3 Months Ended
	Mar. 31, 2022
Segment Reporting [Abstract]
Financial Information for Segments of FNB	The following tables provide financial information for these segments of FNB. The information provided under the caption “Parent and Other” represents operations not considered to be reportable segments and/or general operating expenses of FNB, and includes the parent company, other non-bank subsidiaries and eliminations and adjustments to reconcile to the Consolidated Financial Statements. TABLE 18.1 (in millions) Community Wealth Insurance Parent and Consolidated At or for the Three Months Ended March 31, 2022 Interest income $ 253 $ — $ — $ 1 $ 254 Interest expense 17 — — 3 20 Net interest income 236 — — (2) 234 Provision for credit losses 17 — — 1 18 Non-interest income 56 16 7 (1) 78 Non-interest expense (1) 207 11 5 1 224 Amortization of intangibles 3 — — — 3 Income tax expense (benefit) 14 1 — (1) 14 Net income (loss) 51 4 2 (4) 53 Total assets 41,896 38 33 55 42,022 Total intangibles 2,457 9 27 — 2,493 At or for the Three Months Ended March 31, 2021 Interest income $ 251 $ — $ — $ — $ 251 Interest expense 25 — — 3 28 Net interest income 226 — — (3) 223 Provision for credit losses 6 — — — 6 Non-interest income 63 15 6 (1) 83 Non-interest expense (1) 165 10 5 2 182 Amortization of intangibles 3 — — — 3 Income tax expense (benefit) 22 1 — (1) 22 Net income (loss) 93 4 1 (5) 93 Total assets 38,360 40 34 41 38,475 Total intangibles 2,276 9 28 — 2,313 (1) Excludes amortization of intangibles, which is presented separately.

FAIR VALUE MEASUREMENTS (Tables

FAIR VALUE MEASUREMENTS (Tables)	3 Months Ended
	Mar. 31, 2022
Fair Value Disclosures [Abstract]
Balances of Assets and Liabilities Measured at Fair Value on Recurring Basis	The following table presents the balances of assets and liabilities measured at fair value on a recurring basis: TABLE 19.1 (in millions) Level 1 Level 2 Level 3 Total March 31, 2022 Assets Measured at Fair Value Debt securities available for sale U.S. Treasury $ 194 $ — $ — $ 194 U.S. government agencies — 141 — 141 U.S. government-sponsored entities — 204 — 204 Residential mortgage-backed securities: Agency mortgage-backed securities — 1,387 — 1,387 Agency collateralized mortgage obligations — 1,169 — 1,169 Commercial mortgage-backed securities — 308 — 308 States of the U.S. and political subdivisions (municipals) — 31 — 31 Other debt securities — 10 2 12 Total debt securities available for sale 194 3,250 2 3,446 Loans held for sale — 214 — 214 Derivative financial instruments Trading — 51 — 51 Not for trading — 9 — 9 Total derivative financial instruments — 60 — 60 Total assets measured at fair value on a recurring basis $ 194 $ 3,524 $ 2 $ 3,720 Liabilities Measured at Fair Value Derivative financial instruments Trading $ — $ 155 $ — $ 155 Not for trading — — 13 13 Total derivative financial instruments — 155 13 168 Total liabilities measured at fair value on a recurring basis $ — $ 155 $ 13 $ 168 (in millions) Level 1 Level 2 Level 3 Total December 31, 2021 Assets Measured at Fair Value Debt securities available for sale U.S. Treasury $ 204 $ — $ — $ 204 U.S. government agencies — 155 — 155 U.S. government-sponsored entities — 192 — 192 Residential mortgage-backed securities: Agency mortgage-backed securities — 1,357 — 1,357 Agency collateralized mortgage obligations — 1,186 — 1,186 Commercial mortgage-backed securities — 297 — 297 States of the U.S. and political subdivisions (municipals) — 33 — 33 Other debt securities — 2 — 2 Total debt securities available for sale 204 3,222 — 3,426 Loans held for sale — 269 — 269 Derivative financial instruments Trading — 174 — 174 Not for trading — 2 9 11 Total derivative financial instruments — 176 9 185 Total assets measured at fair value on a recurring basis $ 204 $ 3,667 $ 9 $ 3,880 Liabilities Measured at Fair Value Derivative financial instruments Trading $ — $ 44 $ — $ 44 Not for trading — 1 — 1 Total derivative financial instruments — 45 — 45 Total liabilities measured at fair value on a recurring basis $ — $ 45 $ — $ 45
Additional Information about Assets Measured at Fair Value on Recurring Basis	The following table presents additional information about assets measured at fair value on a recurring basis and for which we have utilized Level 3 inputs to determine fair value: TABLE 19.2 (in millions) Other Interest Total Three Months Ended March 31, 2022 Balance at beginning of period $ — $ 9 $ 9 Purchases, issuances, sales and settlements: Purchases 2 — 2 Settlements — (9) (9) Balance at end of period $ 2 $ — $ 2 Year Ended December 31, 2021 Balance at beginning of period $ — $ 24 $ 24 Purchases, issuances, sales and settlements: Issuances — 9 9 Settlements — (24) (24) Balance at end of period $ — $ 9 $ 9
Additional Information about Assets Measured at Fair Value on Non-Recurring Basis	For assets measured at fair value on a non-recurring basis still held at the Balance Sheet date, the following table provides the hierarchy level and the fair value of the related assets or portfolios: TABLE 19.3 (in millions) Level 1 Level 2 Level 3 Total March 31, 2022 Collateral dependent loans $ — $ — $ 25 $ 25 Other assets - MSRs — — 2 2 Other assets - SBA servicing asset — — 3 3 Other real estate owned — — 2 2 December 31, 2021 Collateral dependent loans $ — $ — $ 20 $ 20 Other assets - MSRs — — 10 10 Other assets - SBA servicing asset — — 3 3 Other real estate owned — — 2 2
Fair Values of Financial Instruments	The fair values of our financial instruments are as follows: TABLE 19.4 Fair Value Measurements (in millions) Carrying Fair Level 1 Level 2 Level 3 March 31, 2022 Financial Assets Cash and cash equivalents $ 3,857 $ 3,857 $ 3,857 $ — $ — Debt securities available for sale 3,446 3,446 194 3,250 2 Debt securities held to maturity 3,513 3,364 — 3,359 5 Net loans and leases, including loans held for sale 26,721 26,076 — 214 25,862 Loan servicing rights 49 61 — — 61 Derivative assets 60 60 — 60 — Accrued interest receivable 80 80 80 — — Financial Liabilities Deposits 33,904 33,864 30,955 2,909 — Short-term borrowings 1,425 1,420 1,420 — — Long-term borrowings 713 722 — — 722 Derivative liabilities 168 168 — 155 13 Accrued interest payable 8 8 8 — — December 31, 2021 Financial Assets Cash and cash equivalents $ 3,493 $ 3,493 $ 3,493 $ — $ — Debt securities available for sale 3,426 3,426 204 3,222 — Debt securities held to maturity 3,463 3,506 — 3,506 — Net loans and leases, including loans held for sale 24,919 24,518 — 269 24,249 Loan servicing rights 47 49 — — 49 Derivative assets 185 185 — 176 9 Accrued interest receivable 76 76 76 — — Financial Liabilities Deposits 31,726 31,725 28,867 2,858 — Short-term borrowings 1,536 1,536 1,536 — — Long-term borrowings 682 704 — — 704 Derivative liabilities 45 45 — 45 — Accrued interest payable 10 10 10 — —

NATURE OF OPERATIONS - Addition

NATURE OF OPERATIONS - Additional Information (Details)	Mar. 31, 2022bankstate
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of states, company operating financial services | state	7
Number of banking offices | bank	341

MERGERS AND ACQUISITIONS - Addi

MERGERS AND ACQUISITIONS - Additional Information (Details) - USD ($) $ in Millions	Jan. 22, 2022	Jan. 31, 2022	Mar. 31, 2022	Mar. 31, 2021
Business Acquisition [Line Items]
Merger expenses			$ 29	$ 0
Howard
Business Acquisition [Line Items]
Assets acquired as a result of merger	$ 2,362
Loans and deposits acquired as a result of merger	1,800
Value of acquisition	443
Number of shares issued (in shares)		34,100,000
Merger expenses			$ 28.6
Financing receivable, purchased with credit deterioration, amount at purchase price	186.9
Financing receivable, purchased with credit deterioration, allowance for credit loss at acquisition date	10
Financing receivable, purchased with credit deterioration, discount (premium)	5.4
Financing receivable, purchased with credit deterioration, fair value	$ 171.5
Howard | Common Stock
Business Acquisition [Line Items]
Number of shares issued (in shares)	34,074,495
Common shares to be acquired (in shares)	18,930,329

MERGERS AND ACQUISITIONS - Bala

MERGERS AND ACQUISITIONS - Balance Sheets Disclosures (Detail) - USD ($) $ in Millions	Jan. 22, 2022	Mar. 31, 2022	Dec. 31, 2021
Fair value of liabilities assumed:
Goodwill recognized		$ 2,434	$ 2,262
Howard
Business Acquisition [Line Items]
Fair value of consideration paid	$ 443
Fair value of identifiable assets acquired:
Cash and cash equivalents	75
Securities	321
Loans	1,780
Core deposit and other intangible assets	19
Fixed and other assets	167
Total identifiable assets acquired	2,362
Fair value of liabilities assumed:
Deposits	1,831
Borrowings	247
Other liabilities	13
Total liabilities assumed	2,091
Fair value of net identifiable assets acquired	271
Goodwill recognized	$ 172

SECURITIES - Additional Informa

SECURITIES - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Schedule Of Securities [Line Items]
Debt securities available for sale, allowance for credit losses	$ 0	$ 0
Debt securities held to maturity, allowance for credit losses	120,000	50,000
Municipal bond portfolio, value	$ 1,000,000,000
Percentage of formal credit enhancement insurance of municipalities	60.00%
Corporate bond portfolio, at carrying value	$ 16,900,000
Municipal Bonds | Weighted Average
Schedule Of Securities [Line Items]
Average holding size of securities in bond portfolio	$ 3,500,000
Municipal Bonds | Credit Concentration Risk | General Obligation Bonds | A Rating or Better | Minimum
Schedule Of Securities [Line Items]
Percentage of portfolio	100.00%
Municipal Bonds | Geographic Concentration Risk | Pennsylvania, Ohio and Maryland
Schedule Of Securities [Line Items]
Percentage of portfolio	61.00%
Corporate Bond | Weighted Average
Schedule Of Securities [Line Items]
Average holding size of securities in bond portfolio	$ 1,700,000
Available-for-sale debt securities
Schedule Of Securities [Line Items]
Accrued investment income receivable	6,900,000	7,300,000
States of the U.S. and political subdivisions (municipals)
Schedule Of Securities [Line Items]
Debt securities held to maturity, allowance for credit losses	120,000	50,000
Held-to-maturity securities
Schedule Of Securities [Line Items]
Accrued investment income receivable	$ 11,100,000	$ 12,300,000

SECURITIES - Amortized Cost and

SECURITIES - Amortized Cost and Fair Value of Securities Available for Sale (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 3,600	$ 3,416
Gross Unrealized Gains	2	36
Gross Unrealized Losses	(156)	(26)
Debt securities, available for sale	3,446	3,426
U.S. Treasury
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	205	205
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(11)	(1)
Debt securities, available for sale	194	204
U.S. government agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	140	154
Gross Unrealized Gains	1	1
Gross Unrealized Losses	0	0
Debt securities, available for sale	141	155
U.S. government-sponsored entities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	214	194
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(10)	(2)
Debt securities, available for sale	204	192
Agency mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,440	1,342
Gross Unrealized Gains	1	19
Gross Unrealized Losses	(54)	(4)
Debt securities, available for sale	1,387	1,357
Agency collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,236	1,192
Gross Unrealized Gains	0	11
Gross Unrealized Losses	(67)	(17)
Debt securities, available for sale	1,169	1,186
Commercial mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	320	294
Gross Unrealized Gains	0	5
Gross Unrealized Losses	(12)	(2)
Debt securities, available for sale	308	297
States of the U.S. and political subdivisions (municipals)
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	33	33
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(2)	0
Debt securities, available for sale	31	33
Other debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	12	2
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Debt securities, available for sale	$ 12	$ 2

SECURITIES - Amortized Cost a_2

SECURITIES - Amortized Cost and Fair Value of Securities Held to Maturity (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Investment Securities Held To Maturity [Line Items]
Amortized Cost	$ 3,513	$ 3,463
Gross Unrealized Gains	5	62
Gross Unrealized Losses	(154)	(19)
Fair  Value	3,364	3,506
U.S. Treasury
Investment Securities Held To Maturity [Line Items]
Amortized Cost	1	1
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair  Value	1	1
U.S. government agencies
Investment Securities Held To Maturity [Line Items]
Amortized Cost	1	1
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair  Value	1	1
Agency mortgage-backed securities
Investment Securities Held To Maturity [Line Items]
Amortized Cost	1,261	1,191
Gross Unrealized Gains	1	15
Gross Unrealized Losses	(53)	(5)
Fair  Value	1,209	1,201
Agency collateralized mortgage obligations
Investment Securities Held To Maturity [Line Items]
Amortized Cost	943	930
Gross Unrealized Gains	0	5
Gross Unrealized Losses	(55)	(12)
Fair  Value	888	923
Commercial mortgage-backed securities
Investment Securities Held To Maturity [Line Items]
Amortized Cost	328	323
Gross Unrealized Gains	0	3
Gross Unrealized Losses	(16)	(2)
Fair  Value	312	324
States of the U.S. and political subdivisions (municipals)
Investment Securities Held To Maturity [Line Items]
Amortized Cost	974	1,017
Gross Unrealized Gains	4	39
Gross Unrealized Losses	(30)	0
Fair  Value	948	$ 1,056
Other debt securities
Investment Securities Held To Maturity [Line Items]
Amortized Cost	5
Gross Unrealized Gains	0
Gross Unrealized Losses	0
Fair  Value	$ 5

SECURITIES - Amortized Cost a_3

SECURITIES - Amortized Cost and Fair Value of Securities, by Contractual Maturities (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Schedule Of Securities [Line Items]
Available for sale, due in one year or less, amortized cost	$ 9
Available for sale, due after one year but within five years, amortized cost	434
Available for sale, due after five years but within ten years, amortized cost	106
Available for sale, due after ten years, amortized cost	55
Available for sale, with contractual maturities, amortized cost	604
Amortized Cost	3,600	$ 3,416
Available for sale, due in one year or less, fair value	9
Available for sale, due after one year but within five years, fair value	412
Available for sale, due after five years but within ten years, fair value	105
Available for sale, due after ten years, fair value	56
Available for sale, with contractual maturities, fair value	582
Fair Value	3,446	3,426
Held to maturity, due in one year or less, amortized cost	1
Held to maturity, due after one year but within five years, amortized cost	23
Held to maturity, due after five years but within ten years, amortized cost	141
Held to maturity, due after ten years, amortized cost	816
Held to maturity, with contractual maturities, amortized cost	981
Amortized Cost	3,513	3,463
Held to maturity, due in one year or less, fair value	1
Held to maturity, due after one year but within five years, fair value	23
Held to maturity, due after five years but within ten years, fair value	137
Held to maturity, due after ten years, fair value	794
Held to maturity, with contractual maturities, fair value	955
Held to maturity, fair value	3,364	3,506
Agency mortgage-backed securities
Schedule Of Securities [Line Items]
Available-for-sale, amortized cost	1,440
Amortized Cost	1,440	1,342
Available for sale, fair value	1,387
Fair Value	1,387	1,357
Held to maturity, amortized cost	1,261
Amortized Cost	1,261	1,191
Held to maturity, fair value	1,209
Held to maturity, fair value	1,209	1,201
Agency collateralized mortgage obligations
Schedule Of Securities [Line Items]
Available-for-sale, amortized cost	1,236
Amortized Cost	1,236	1,192
Available for sale, fair value	1,169
Fair Value	1,169	1,186
Held to maturity, amortized cost	943
Amortized Cost	943	930
Held to maturity, fair value	888
Held to maturity, fair value	888	923
Commercial mortgage-backed securities
Schedule Of Securities [Line Items]
Available-for-sale, amortized cost	320
Amortized Cost	320	294
Available for sale, fair value	308
Fair Value	308	297
Held to maturity, amortized cost	328
Amortized Cost	328	323
Held to maturity, fair value	312
Held to maturity, fair value	$ 312	$ 324

SECURITIES - Schedule of Securi

SECURITIES - Schedule of Securities Pledged as Collateral (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Securities pledged (carrying value), to secure public deposits, trust deposits and for other purposes as required by law	$ 5,712	$ 5,660
Securities pledged (carrying value), as collateral for short-term borrowings	$ 403	$ 392
Securities pledged as a percent of total securities	87.90%	87.90%

SECURITIES - Fair Values and Un

SECURITIES - Fair Values and Unrealized Losses of Impaired Securities, by Length of Impairment (Details) $ in Millions	Mar. 31, 2022USD ($)security	Dec. 31, 2021USD ($)security
Schedule Of Securities [Line Items]
Debt securities, available-for-sale, less than 12 months, number of positions | security	210	60
Debt securities, available-for-sale, 12 months or longer, number of positions | security	21	14
Debt securities, available-for-sale, number of positions | security	231	74
Debt securities, available-for-sale, less than 12 months	$ 3,006	$ 1,679
Debt securities, available-for-sale, 12 months or longer	262	102
Debt securities, available-for-sale, unrealized loss position	3,268	1,781
Debt securities, available-for-sale, less than 12 months, accumulated loss	(133)	(23)
Debt securities, available-for-sale, 12 months or longer, accumulated loss	(23)	(3)
Debt securities, available-for-sale, accumulated loss	$ (156)	$ (26)
U.S. Treasury
Schedule Of Securities [Line Items]
Debt securities, available-for-sale, less than 12 months, number of positions | security	4	3
Debt securities, available-for-sale, 12 months or longer, number of positions | security	0	0
Debt securities, available-for-sale, number of positions | security	4	3
Debt securities, available-for-sale, less than 12 months	$ 194	$ 151
Debt securities, available-for-sale, 12 months or longer	0	0
Debt securities, available-for-sale, unrealized loss position	194	151
Debt securities, available-for-sale, less than 12 months, accumulated loss	(11)	(1)
Debt securities, available-for-sale, 12 months or longer, accumulated loss	0	0
Debt securities, available-for-sale, accumulated loss	$ (11)	$ (1)
U.S. government agencies
Schedule Of Securities [Line Items]
Debt securities, available-for-sale, less than 12 months, number of positions | security	6	3
Debt securities, available-for-sale, 12 months or longer, number of positions | security	9	9
Debt securities, available-for-sale, number of positions | security	15	12
Debt securities, available-for-sale, less than 12 months	$ 50	$ 22
Debt securities, available-for-sale, 12 months or longer	7	8
Debt securities, available-for-sale, unrealized loss position	57	30
Debt securities, available-for-sale, less than 12 months, accumulated loss	0	0
Debt securities, available-for-sale, 12 months or longer, accumulated loss	0	0
Debt securities, available-for-sale, accumulated loss	$ 0	$ 0
U.S. government-sponsored entities
Schedule Of Securities [Line Items]
Debt securities, available-for-sale, less than 12 months, number of positions | security	11	3
Debt securities, available-for-sale, 12 months or longer, number of positions | security	1	1
Debt securities, available-for-sale, number of positions | security	12	4
Debt securities, available-for-sale, less than 12 months	$ 181	$ 99
Debt securities, available-for-sale, 12 months or longer	23	24
Debt securities, available-for-sale, unrealized loss position	204	123
Debt securities, available-for-sale, less than 12 months, accumulated loss	(8)	(1)
Debt securities, available-for-sale, 12 months or longer, accumulated loss	(2)	(1)
Debt securities, available-for-sale, accumulated loss	$ (10)	$ (2)
Agency mortgage-backed securities
Schedule Of Securities [Line Items]
Debt securities, available-for-sale, less than 12 months, number of positions | security	101	13
Debt securities, available-for-sale, 12 months or longer, number of positions | security	0	0
Debt securities, available-for-sale, number of positions | security	101	13
Debt securities, available-for-sale, less than 12 months	$ 1,346	$ 599
Debt securities, available-for-sale, 12 months or longer	0	0
Debt securities, available-for-sale, unrealized loss position	1,346	599
Debt securities, available-for-sale, less than 12 months, accumulated loss	(54)	(4)
Debt securities, available-for-sale, 12 months or longer, accumulated loss	0	0
Debt securities, available-for-sale, accumulated loss	$ (54)	$ (4)
Agency collateralized mortgage obligations
Schedule Of Securities [Line Items]
Debt securities, available-for-sale, less than 12 months, number of positions | security	60	23
Debt securities, available-for-sale, 12 months or longer, number of positions | security	7	3
Debt securities, available-for-sale, number of positions | security	67	26
Debt securities, available-for-sale, less than 12 months	$ 952	$ 659
Debt securities, available-for-sale, 12 months or longer	196	68
Debt securities, available-for-sale, unrealized loss position	1,148	727
Debt securities, available-for-sale, less than 12 months, accumulated loss	(49)	(15)
Debt securities, available-for-sale, 12 months or longer, accumulated loss	(18)	(2)
Debt securities, available-for-sale, accumulated loss	$ (67)	$ (17)
Commercial mortgage-backed securities
Schedule Of Securities [Line Items]
Debt securities, available-for-sale, less than 12 months, number of positions | security	11	5
Debt securities, available-for-sale, 12 months or longer, number of positions | security	2	0
Debt securities, available-for-sale, number of positions | security	13	5
Debt securities, available-for-sale, less than 12 months	$ 250	$ 125
Debt securities, available-for-sale, 12 months or longer	31	0
Debt securities, available-for-sale, unrealized loss position	281	125
Debt securities, available-for-sale, less than 12 months, accumulated loss	(10)	(2)
Debt securities, available-for-sale, 12 months or longer, accumulated loss	(2)	0
Debt securities, available-for-sale, accumulated loss	$ (12)	$ (2)
States of the U.S. and political subdivisions (municipals)
Schedule Of Securities [Line Items]
Debt securities, available-for-sale, less than 12 months, number of positions | security	12	10
Debt securities, available-for-sale, 12 months or longer, number of positions | security	1	0
Debt securities, available-for-sale, number of positions | security	13	10
Debt securities, available-for-sale, less than 12 months	$ 27	$ 24
Debt securities, available-for-sale, 12 months or longer	3	0
Debt securities, available-for-sale, unrealized loss position	30	24
Debt securities, available-for-sale, less than 12 months, accumulated loss	(1)	0
Debt securities, available-for-sale, 12 months or longer, accumulated loss	(1)	0
Debt securities, available-for-sale, accumulated loss	$ (2)	$ 0
Other debt securities
Schedule Of Securities [Line Items]
Debt securities, available-for-sale, less than 12 months, number of positions | security	5	0
Debt securities, available-for-sale, 12 months or longer, number of positions | security	1	1
Debt securities, available-for-sale, number of positions | security	6	1
Debt securities, available-for-sale, less than 12 months	$ 6	$ 0
Debt securities, available-for-sale, 12 months or longer	2	2
Debt securities, available-for-sale, unrealized loss position	8	2
Debt securities, available-for-sale, less than 12 months, accumulated loss	0	0
Debt securities, available-for-sale, 12 months or longer, accumulated loss	0	0
Debt securities, available-for-sale, accumulated loss	$ 0	$ 0

LOANS AND LEASES - Additional I

LOANS AND LEASES - Additional Information (Details) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2022USD ($)state	Dec. 31, 2021USD ($)	Mar. 31, 2021USD ($)	Dec. 31, 2020USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrued interest receivable	$ 54.9	$ 48.9
Discount remaining	$ 37.1	30
Number of states, company operating financial services | state	7
Restructured loans returned to performing status	$ 2.5
Total loan on allowance	371	344
Pooled reserves for all other classes of loans	3.5	3.9
Howard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Discount remaining	$ 10
Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due period for loan to be in default	90 days
Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due period for loan to be in default	12 months
SBA-Guaranteed Loan Servicing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Guaranteed percentage	100.00%
Residential Mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value of OREO through foreclosure	$ 1.4	1.6
Mortgage loans on real estate, foreclosure	9.1	4.3
Total commercial loans and leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loan on allowance	275	261.2	$ 281	$ 280
Total commercial loans and leases | Specific Reserves for Commercial Troubled Debt Restructurings
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loan on allowance	1.5	1.5
Total commercial loans and leases | Pooled Reserves For Commercial Troubled Debt Restructurings
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loan on allowance	1.3	1.5
Total commercial loans and leases | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loan on allowance	91.7	87.4	$ 79	$ 81
Total commercial loans and leases | Commercial and industrial | Paycheck Protection Program Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans to customers	179.6	$ 336.6
Total commercial loans and leases | Commercial loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, collateral dependent	67.3
Total commercial loans and leases | Commercial loan | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Threshold for loans whose terms have been modified in a trouble debt restructuring, non accrual	$ 1

LOANS AND LEASES - Net of Unear

LOANS AND LEASES - Net of Unearned Income (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost loans and leases, carrying amount	$ 26,839	$ 24,968
Total commercial loans and leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost loans and leases, carrying amount	17,581	16,465
Total commercial loans and leases | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost loans and leases, carrying amount	10,746	9,899
Total commercial loans and leases | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost loans and leases, carrying amount	6,220	5,977
Total commercial loans and leases | Commercial leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost loans and leases, carrying amount	471	495
Total commercial loans and leases | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost loans and leases, carrying amount	144	94
Total consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost loans and leases, carrying amount	9,258	8,503
Total consumer loans | Direct installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost loans and leases, carrying amount	2,568	2,376
Total consumer loans | Residential mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost loans and leases, carrying amount	4,188	3,654
Total consumer loans | Indirect installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost loans and leases, carrying amount	1,216	1,227
Total consumer loans | Consumer lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost loans and leases, carrying amount	$ 1,286	$ 1,246

LOANS AND LEASES - Commercial R

LOANS AND LEASES - Commercial Real Estate Loans (Details) - Loan Portfolio Diversification Risk - Commercial real estate	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Percent owner-occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Percent of total loans and leases	29.30%	28.80%
Percent non-owner-occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Percent of total loans and leases	70.70%	71.20%

LOANS AND LEASES - Origination

LOANS AND LEASES - Origination Year (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	$ 1,590	$ 6,587
Fiscal year before current fiscal year	6,752	4,518
Two years before current fiscal year	4,499	3,256
Three years before current fiscal year	3,156	1,952
Four years before current fiscal year	1,901	1,579
Prior	5,913	4,130
Revolving Loans Amortized Cost Basis	3,028	2,946
Total Loans and Leases	26,839	24,968
Current
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans and Leases	26,661	24,815
Past due
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans and Leases	178	153
Total commercial loans and leases
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	929	3,786
Fiscal year before current fiscal year	3,792	2,779
Two years before current fiscal year	2,803	2,484
Three years before current fiscal year	2,395	1,486
Four years before current fiscal year	1,478	1,200
Prior	4,233	2,858
Revolving Loans Amortized Cost Basis	1,951	1,872
Total Loans and Leases	17,581	16,465
Total commercial loans and leases | Current
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans and Leases	17,490	16,385
Total commercial loans and leases | Past due
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans and Leases	91	80
Total commercial loans and leases | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	423	1,893
Fiscal year before current fiscal year	2,167	1,818
Two years before current fiscal year	1,853	1,620
Three years before current fiscal year	1,616	980
Four years before current fiscal year	994	895
Prior	3,487	2,498
Revolving Loans Amortized Cost Basis	206	195
Total Loans and Leases	10,746	9,899
Total commercial loans and leases | Commercial real estate | Current
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans and Leases	10,677	9,840
Total commercial loans and leases | Commercial real estate | Past due
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans and Leases	69	59
Total commercial loans and leases | Commercial real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	423	1,878
Fiscal year before current fiscal year	2,123	1,782
Two years before current fiscal year	1,813	1,503
Three years before current fiscal year	1,480	830
Four years before current fiscal year	839	743
Prior	2,937	2,171
Revolving Loans Amortized Cost Basis	196	183
Total Loans and Leases	9,811	9,090
Total commercial loans and leases | Commercial real estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	15
Fiscal year before current fiscal year	44	21
Two years before current fiscal year	24	89
Three years before current fiscal year	93	105
Four years before current fiscal year	101	107
Prior	306	175
Revolving Loans Amortized Cost Basis	1	9
Total Loans and Leases	569	521
Total commercial loans and leases | Commercial real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
Fiscal year before current fiscal year	0	15
Two years before current fiscal year	16	28
Three years before current fiscal year	43	45
Four years before current fiscal year	54	45
Prior	244	152
Revolving Loans Amortized Cost Basis	9	3
Total Loans and Leases	366	288
Total commercial loans and leases | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	427	1,672
Fiscal year before current fiscal year	1,459	849
Two years before current fiscal year	850	763
Three years before current fiscal year	729	450
Four years before current fiscal year	444	263
Prior	638	355
Revolving Loans Amortized Cost Basis	1,673	1,625
Total Loans and Leases	6,220	5,977
Total commercial loans and leases | Commercial and industrial | Current
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans and Leases	6,202	5,958
Total commercial loans and leases | Commercial and industrial | Past due
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans and Leases	18	19
Total commercial loans and leases | Commercial and industrial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	426	1,663
Fiscal year before current fiscal year	1,444	833
Two years before current fiscal year	823	731
Three years before current fiscal year	697	386
Four years before current fiscal year	390	184
Prior	475	296
Revolving Loans Amortized Cost Basis	1,576	1,509
Total Loans and Leases	5,831	5,602
Total commercial loans and leases | Commercial and industrial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	1	8
Fiscal year before current fiscal year	7	12
Two years before current fiscal year	16	18
Three years before current fiscal year	18	7
Four years before current fiscal year	28	37
Prior	101	42
Revolving Loans Amortized Cost Basis	32	52
Total Loans and Leases	203	176
Total commercial loans and leases | Commercial and industrial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	1
Fiscal year before current fiscal year	8	4
Two years before current fiscal year	11	14
Three years before current fiscal year	14	57
Four years before current fiscal year	26	42
Prior	62	17
Revolving Loans Amortized Cost Basis	65	64
Total Loans and Leases	186	199
Total commercial loans and leases | Commercial leases
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	22	182
Fiscal year before current fiscal year	166	112
Two years before current fiscal year	100	101
Three years before current fiscal year	50	56
Four years before current fiscal year	40	42
Prior	93	2
Revolving Loans Amortized Cost Basis	0	0
Total Loans and Leases	471	495
Total commercial loans and leases | Commercial leases | Current
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans and Leases	470	493
Total commercial loans and leases | Commercial leases | Past due
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans and Leases	1	2
Total commercial loans and leases | Commercial leases | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	22	182
Fiscal year before current fiscal year	165	109
Two years before current fiscal year	98	98
Three years before current fiscal year	48	53
Four years before current fiscal year	40	39
Prior	90	1
Revolving Loans Amortized Cost Basis	0	0
Total Loans and Leases	463	482
Total commercial loans and leases | Commercial leases | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
Fiscal year before current fiscal year	1	1
Two years before current fiscal year	0	0
Three years before current fiscal year	0	2
Four years before current fiscal year	0	3
Prior	0	1
Revolving Loans Amortized Cost Basis	0	0
Total Loans and Leases	1	7
Total commercial loans and leases | Commercial leases | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
Fiscal year before current fiscal year	0	2
Two years before current fiscal year	2	3
Three years before current fiscal year	2	1
Four years before current fiscal year	0	0
Prior	3	0
Revolving Loans Amortized Cost Basis	0	0
Total Loans and Leases	7	6
Total commercial loans and leases | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	57	39
Fiscal year before current fiscal year	0	0
Two years before current fiscal year	0	0
Three years before current fiscal year	0	0
Four years before current fiscal year	0	0
Prior	15	3
Revolving Loans Amortized Cost Basis	72	52
Total Loans and Leases	144	94
Total commercial loans and leases | Other | Current
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans and Leases	141	94
Total commercial loans and leases | Other | Past due
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans and Leases	3	0
Total commercial loans and leases | Other | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	57	39
Fiscal year before current fiscal year	0	0
Two years before current fiscal year	0	0
Three years before current fiscal year	0	0
Four years before current fiscal year	0	0
Prior	15	3
Revolving Loans Amortized Cost Basis	72	52
Total Loans and Leases	144	94
Total consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	661	2,801
Fiscal year before current fiscal year	2,960	1,739
Two years before current fiscal year	1,696	772
Three years before current fiscal year	761	466
Four years before current fiscal year	423	379
Prior	1,680	1,272
Revolving Loans Amortized Cost Basis	1,077	1,074
Total Loans and Leases	9,258	8,503
Total consumer loans | Current
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans and Leases	9,171	8,430
Total consumer loans | Past due
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans and Leases	87	73
Total consumer loans | Direct installment
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	265	978
Fiscal year before current fiscal year	983	538
Two years before current fiscal year	524	216
Three years before current fiscal year	198	126
Four years before current fiscal year	113	96
Prior	485	422
Revolving Loans Amortized Cost Basis	0	0
Total Loans and Leases	2,568	2,376
Total consumer loans | Direct installment | Current
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	265	978
Fiscal year before current fiscal year	983	538
Two years before current fiscal year	523	215
Three years before current fiscal year	197	125
Four years before current fiscal year	112	96
Prior	475	412
Revolving Loans Amortized Cost Basis	0	0
Total Loans and Leases	2,555	2,364
Total consumer loans | Direct installment | Past due
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
Fiscal year before current fiscal year	0	0
Two years before current fiscal year	1	1
Three years before current fiscal year	1	1
Four years before current fiscal year	1	0
Prior	10	10
Revolving Loans Amortized Cost Basis	0	0
Total Loans and Leases	13	12
Total consumer loans | Residential mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	237	1,281
Fiscal year before current fiscal year	1,474	933
Two years before current fiscal year	933	393
Three years before current fiscal year	420	155
Four years before current fiscal year	155	215
Prior	969	677
Revolving Loans Amortized Cost Basis	0	0
Total Loans and Leases	4,188	3,654
Total consumer loans | Residential mortgages | Current
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	237	1,280
Fiscal year before current fiscal year	1,470	932
Two years before current fiscal year	929	392
Three years before current fiscal year	418	152
Four years before current fiscal year	152	212
Prior	935	652
Revolving Loans Amortized Cost Basis	0	0
Total Loans and Leases	4,141	3,620
Total consumer loans | Residential mortgages | Past due
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	1
Fiscal year before current fiscal year	4	1
Two years before current fiscal year	4	1
Three years before current fiscal year	2	3
Four years before current fiscal year	3	3
Prior	34	25
Revolving Loans Amortized Cost Basis	0	0
Total Loans and Leases	47	34
Total consumer loans | Indirect installment
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	127	522
Fiscal year before current fiscal year	483	265
Two years before current fiscal year	237	159
Three years before current fiscal year	139	180
Four years before current fiscal year	150	65
Prior	80	36
Revolving Loans Amortized Cost Basis	0	0
Total Loans and Leases	1,216	1,227
Total consumer loans | Indirect installment | Current
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	127	516
Fiscal year before current fiscal year	478	262
Two years before current fiscal year	235	157
Three years before current fiscal year	137	178
Four years before current fiscal year	149	64
Prior	78	35
Revolving Loans Amortized Cost Basis	0	0
Total Loans and Leases	1,204	1,212
Total consumer loans | Indirect installment | Past due
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	6
Fiscal year before current fiscal year	5	3
Two years before current fiscal year	2	2
Three years before current fiscal year	2	2
Four years before current fiscal year	1	1
Prior	2	1
Revolving Loans Amortized Cost Basis	0	0
Total Loans and Leases	12	15
Total consumer loans | Consumer lines of credit
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	32	20
Fiscal year before current fiscal year	20	3
Two years before current fiscal year	2	4
Three years before current fiscal year	4	5
Four years before current fiscal year	5	3
Prior	146	137
Revolving Loans Amortized Cost Basis	1,077	1,074
Total Loans and Leases	1,286	1,246
Total consumer loans | Consumer lines of credit | Current
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	32	20
Fiscal year before current fiscal year	20	3
Two years before current fiscal year	2	4
Three years before current fiscal year	4	5
Four years before current fiscal year	5	3
Prior	133	127
Revolving Loans Amortized Cost Basis	1,075	1,072
Total Loans and Leases	1,271	1,234
Total consumer loans | Consumer lines of credit | Past due
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
Fiscal year before current fiscal year	0	0
Two years before current fiscal year	0	0
Three years before current fiscal year	0	0
Four years before current fiscal year	0	0
Prior	13	10
Revolving Loans Amortized Cost Basis	2	2
Total Loans and Leases	$ 15	$ 12

LOANS AND LEASES - Age Analysis

LOANS AND LEASES - Age Analysis of Past Due Loans (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	$ 26,839	$ 24,968
90 Days Past Due and Still Accruing	8	6
Non-accrual loans	102	88
Non-accrual with No ACL	27	24
30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	68	59
Past due
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	178	153
Current
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	26,661	24,815
Total commercial loans and leases
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	17,581	16,465
90 Days Past Due and Still Accruing	0	0
Non-accrual loans	67	64
Non-accrual with No ACL	27	24
Total commercial loans and leases | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	10,746	9,899
90 Days Past Due and Still Accruing	0	0
Non-accrual loans	53	48
Non-accrual with No ACL	26	20
Total commercial loans and leases | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	6,220	5,977
90 Days Past Due and Still Accruing	0	0
Non-accrual loans	12	15
Non-accrual with No ACL	1	4
Total commercial loans and leases | Commercial leases
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	471	495
90 Days Past Due and Still Accruing	0	0
Non-accrual loans	1	1
Non-accrual with No ACL	0	0
Total commercial loans and leases | Other
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	144	94
90 Days Past Due and Still Accruing	0	0
Non-accrual loans	1	0
Non-accrual with No ACL	0	0
Total commercial loans and leases | 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	24	16
Total commercial loans and leases | 30-89 Days Past Due | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	16	11
Total commercial loans and leases | 30-89 Days Past Due | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	6	4
Total commercial loans and leases | 30-89 Days Past Due | Commercial leases
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	0	1
Total commercial loans and leases | 30-89 Days Past Due | Other
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	2	0
Total commercial loans and leases | Past due
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	91	80
Total commercial loans and leases | Past due | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	69	59
Total commercial loans and leases | Past due | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	18	19
Total commercial loans and leases | Past due | Commercial leases
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1	2
Total commercial loans and leases | Past due | Other
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	3	0
Total commercial loans and leases | Current
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	17,490	16,385
Total commercial loans and leases | Current | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	10,677	9,840
Total commercial loans and leases | Current | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	6,202	5,958
Total commercial loans and leases | Current | Commercial leases
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	470	493
Total commercial loans and leases | Current | Other
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	141	94
Total consumer loans
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	9,258	8,503
90 Days Past Due and Still Accruing	8	6
Non-accrual loans	35	24
Non-accrual with No ACL	0	0
Total consumer loans | Direct installment
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	2,568	2,376
90 Days Past Due and Still Accruing	0	0
Non-accrual loans	7	7
Non-accrual with No ACL	0	0
Total consumer loans | Residential mortgages
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	4,188	3,654
90 Days Past Due and Still Accruing	6	4
Non-accrual loans	20	10
Non-accrual with No ACL	0	0
Total consumer loans | Indirect installment
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,216	1,227
90 Days Past Due and Still Accruing	0	1
Non-accrual loans	2	2
Non-accrual with No ACL	0	0
Total consumer loans | Consumer lines of credit
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,286	1,246
90 Days Past Due and Still Accruing	2	1
Non-accrual loans	6	5
Non-accrual with No ACL	0	0
Total consumer loans | 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	44	43
Total consumer loans | 30-89 Days Past Due | Direct installment
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	6	5
Total consumer loans | 30-89 Days Past Due | Residential mortgages
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	21	20
Total consumer loans | 30-89 Days Past Due | Indirect installment
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	10	12
Total consumer loans | 30-89 Days Past Due | Consumer lines of credit
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	7	6
Total consumer loans | Past due
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	87	73
Total consumer loans | Past due | Direct installment
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	13	12
Total consumer loans | Past due | Residential mortgages
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	47	34
Total consumer loans | Past due | Indirect installment
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	12	15
Total consumer loans | Past due | Consumer lines of credit
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	15	12
Total consumer loans | Current
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	9,171	8,430
Total consumer loans | Current | Direct installment
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	2,555	2,364
Total consumer loans | Current | Residential mortgages
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	4,141	3,620
Total consumer loans | Current | Indirect installment
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,204	1,212
Total consumer loans | Current | Consumer lines of credit
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	$ 1,271	$ 1,234

LOANS AND LEASES - Non-Performi

LOANS AND LEASES - Non-Performing Assets (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	$ 102	$ 88
Non-Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	102	88
Total non-performing loans	102	88
Other real estate owned	8	8
Total non-performing assets	$ 110	$ 96
Non-performing loans / total loans and leases	0.38%	0.35%
Non-performing assets + 90 days past due / total loans and leases + OREO	0.44%	0.41%
Past due	90 days	90 days

LOANS AND LEASES - Summary of P

LOANS AND LEASES - Summary of Payment Status of TDRs (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructurings ("TDRs")	$ 92	$ 92
Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructurings ("TDRs")	60	60
Non-accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructurings ("TDRs")	$ 32	$ 32

LOANS AND LEASES - Troubled Deb

LOANS AND LEASES - Troubled Debt Restructurings (Details) $ in Millions	3 Months Ended
	Mar. 31, 2022USD ($)contract	Mar. 31, 2021USD ($)contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	23	34
Pre- Modification Outstanding Recorded Investment	$ 1	$ 19
Post- Modification Outstanding Recorded Investment	$ 1	$ 19
Total commercial loans and leases
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	2	12
Pre- Modification Outstanding Recorded Investment	$ 0	$ 17
Post- Modification Outstanding Recorded Investment	$ 0	$ 17
Total commercial loans and leases | Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	2	11
Pre- Modification Outstanding Recorded Investment	$ 0	$ 17
Post- Modification Outstanding Recorded Investment	$ 0	$ 17
Total commercial loans and leases | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract		1
Pre- Modification Outstanding Recorded Investment		$ 0
Post- Modification Outstanding Recorded Investment		$ 0
Total consumer loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	21	22
Pre- Modification Outstanding Recorded Investment	$ 1	$ 2
Post- Modification Outstanding Recorded Investment	$ 1	$ 2
Total consumer loans | Direct installment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	13	10
Pre- Modification Outstanding Recorded Investment	$ 0	$ 0
Post- Modification Outstanding Recorded Investment	$ 0	$ 0
Total consumer loans | Residential mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	5	2
Pre- Modification Outstanding Recorded Investment	$ 1	$ 1
Post- Modification Outstanding Recorded Investment	$ 1	$ 1
Total consumer loans | Consumer lines of credit
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	3	10
Pre- Modification Outstanding Recorded Investment	$ 0	$ 1
Post- Modification Outstanding Recorded Investment	$ 0	$ 1

LOANS AND LEASES - Troubled D_2

LOANS AND LEASES - Troubled Debt Restructurings, Payment Default (Details) $ in Millions	3 Months Ended
	Mar. 31, 2022USD ($)contract	Mar. 31, 2021USD ($)contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	5	2
Recorded Investment | $	$ 0	$ 0
Total commercial loans and leases
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	3	1
Recorded Investment | $	$ 0	$ 0
Total commercial loans and leases | Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	3
Recorded Investment | $	$ 0
Total commercial loans and leases | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract		1
Recorded Investment | $		$ 0
Total consumer loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	2	1
Recorded Investment | $	$ 0	$ 0
Total consumer loans | Direct installment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	1
Recorded Investment | $	$ 0
Total consumer loans | Residential mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	1	1
Recorded Investment | $	$ 0	$ 0

ALLOWANCE FOR CREDIT LOSSES O_3

ALLOWANCE FOR CREDIT LOSSES ON LOANS AND LEASES - Changes in Allowance for Credit Losses (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	$ 344
Provision for Credit Losses	18	$ 6
Balance at End of Period	371
Unfunded loan commitment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	19.1	14
Charge- Offs	0	0
Recoveries	0	0
Net Charge- Offs	0	0
Provision for Credit Losses	(0.3)	0
Allowance for PCD Loans and Leases at Acquisition	0
Balance at End of Period	18.8	14
Total commercial loans and leases
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	261.2	280
Charge- Offs	(5)	(10)
Recoveries	2.9	4
Net Charge- Offs	(2.1)	(6)
Provision for Credit Losses	8.1	7
Allowance for PCD Loans and Leases at Acquisition	7.8
Balance at End of Period	275	281
Total commercial loans and leases | Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	156.5	181
Charge- Offs	(1)	(1)
Recoveries	1.4	1
Net Charge- Offs	0.4	0
Provision for Credit Losses	4.4	3
Allowance for PCD Loans and Leases at Acquisition	4.4
Balance at End of Period	165.7	184
Total commercial loans and leases | Commercial and industrial
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	87.4	81
Charge- Offs	(3.2)	(8)
Recoveries	1.3	1
Net Charge- Offs	(1.9)	(7)
Provision for Credit Losses	2.8	5
Allowance for PCD Loans and Leases at Acquisition	3.4
Balance at End of Period	91.7	79
Total commercial loans and leases | Commercial leases
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	14.7	17
Charge- Offs	(0.1)	0
Recoveries	0	1
Net Charge- Offs	(0.1)	1
Provision for Credit Losses	(0.8)	(1)
Allowance for PCD Loans and Leases at Acquisition	0
Balance at End of Period	13.8	17
Total commercial loans and leases | Other
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	2.6	1
Charge- Offs	(0.7)	(1)
Recoveries	0.2	1
Net Charge- Offs	(0.5)	0
Provision for Credit Losses	1.7	0
Allowance for PCD Loans and Leases at Acquisition	0
Balance at End of Period	3.8	1
Total commercial loans and leases | Unfunded loan commitment
Allowance for Loan and Lease Losses [Roll Forward]
Provision for Credit Losses	0	0
Total consumer loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	83.1	83
Charge- Offs	(1.3)	(2)
Recoveries	1.5	1
Net Charge- Offs	0.2	(1)
Provision for Credit Losses	10.1	(1)
Allowance for PCD Loans and Leases at Acquisition	2.2
Balance at End of Period	95.6	81
Total consumer loans | Direct installment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	26.4	26
Charge- Offs	0	0
Recoveries	0.2	0
Net Charge- Offs	0.2	0
Provision for Credit Losses	4.1	0
Allowance for PCD Loans and Leases at Acquisition	0.5
Balance at End of Period	31.2	26
Total consumer loans | Residential mortgages
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	33.1	34
Charge- Offs	(0.1)	0
Recoveries	0.2	0
Net Charge- Offs	0.1	0
Provision for Credit Losses	5.2	(2)
Allowance for PCD Loans and Leases at Acquisition	1.3
Balance at End of Period	39.7	32
Total consumer loans | Indirect installment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	13.5	11
Charge- Offs	(1)	(2)
Recoveries	0.7	1
Net Charge- Offs	(0.3)	(1)
Provision for Credit Losses	1	1
Allowance for PCD Loans and Leases at Acquisition	0
Balance at End of Period	14.2	11
Total consumer loans | Consumer lines of credit
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	10.1	12
Charge- Offs	(0.2)	0
Recoveries	0.4	0
Net Charge- Offs	0.2	0
Provision for Credit Losses	(0.2)	0
Allowance for PCD Loans and Leases at Acquisition	0.4
Balance at End of Period	10.5	12
Total consumer loans | Unfunded loan commitment
Allowance for Loan and Lease Losses [Roll Forward]
Provision for Credit Losses	0	0
Allowance for credit losses on loans and leases
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	344.3	363
Charge- Offs	(6.3)	(12)
Recoveries	4.4	5
Net Charge- Offs	(1.9)	(7.1)
Provision for Credit Losses	18.2	6
Allowance for PCD Loans and Leases at Acquisition	10
Balance at End of Period	370.6	362
Allowance for credit losses on loans and leases and allowance for unfunded loan commitments
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	363.4	377
Charge- Offs	(6.3)	(12)
Recoveries	4.4	5
Net Charge- Offs	(1.9)	(7)
Provision for Credit Losses	17.9	6
Allowance for PCD Loans and Leases at Acquisition	10
Balance at End of Period	$ 389.4	$ 376

ALLOWANCE FOR CREDIT LOSSES O_4

ALLOWANCE FOR CREDIT LOSSES ON LOANS AND LEASES - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Percentage of growth, housing price index	4.70%		6.30%
Percentage of growth, commercial real estate price index	16.10%		13.00%
Percentage of growth (decline), S&P volatility in next fiscal year	(0.30%)		15.20%
Percentage of growth (decline), S&P volatility in next second year	(5.50%)		1.90%
Allowance for credit loss	$ 371		$ 344
Allowance for credit losses on loans and leases
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss	$ 370.6	$ 362	344.3	$ 363
Financing receivable, allowance for credit loss, period increase (decrease)			$ 26.4
Financing receivable, allowance for credit loss, period increase (decrease), percentage			7.70%
Financing receivable, allowance for credit loss, ratio	1.38%		1.38%
Financing receivable, allowance for credit loss, write-off, after recovery	$ (1.9)	$ (7.1)
Allowance for credit losses on loans and leases | Howard
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, non-purchased credit deterioration loans, allowance for credit loss at acquisition date, provision	$ 19.1

LOAN SERVICING - Activity in MS

LOAN SERVICING - Activity in MSR (Details) - Mortgage Servicing Rights - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Servicing Assets at Fair Value [Line Items]
Mortgage loans sold with servicing retained	$ 4,985		$ 4,855
Mortgage loans sold with servicing retained	351	$ 506
Pretax net gains resulting from above loan sales	1	17
Mortgage servicing fees	3	3
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Balance at beginning of period	44.4	35.6
Additions	4.1	5.2
Payoffs and curtailments	(1.6)	(4.1)
(Impairment charge) / recovery	2.3	2.5
Amortization	(0.7)	(0.6)
Balance at end of period	48.5	38.6
Fair value, start	46	35.6
Fair value, end	58.2	$ 40.2
Valuation allowance for servicing rights	$ 0.2		$ 2.5

LOAN SERVICING - Sensitivity of

LOAN SERVICING - Sensitivity of Fair Value to Changes in key Assumptions (Details) - Mortgage Servicing Rights - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Weighted average life (months)	89 months 28 days	76 months 17 days
Constant prepayment rate (annualized)	8.40%	11.20%
Discount rate	9.50%	9.50%
Sensitivity analysis of fair value, change in interest rates, plus 2.00%	$ 11	$ 15
Sensitivity analysis of fair value, change in interest rates, plus 1.00%	6	9
Sensitivity analysis of fair value, change in interest rates, plus 0.50%	4	5
Sensitivity analysis of fair value, change in interest rates, plus 0.25%	2	3
Sensitivity analysis of fair value, change in interest rates, minus 0.25%	(3)	(3)
Sensitivity analysis of fair value, change in interest rates, minus 0.50%	$ (6)	$ (7)

LEASES - Additional Information

LEASES - Additional Information (Details) $ in Millions	Mar. 31, 2022USD ($)
Leases [Abstract]
Operating lease, right-of-use asset, statement of financial position [extensible enumeration]	Other assets
Operating lease, liability, statement of financial position [extensible enumeration]	Other liabilities
Operating lease, right-of-use asset	$ 136.7
Operating lease, liability	$ 146
Finance lease right-of-use asset [extensible enumeration]	Premises and equipment, net
Finance lease liability [extensible enumeration]	Other liabilities
Finance lease right-of-use asset	$ 15.5
Finance lease liability	15.7
Lessee, operating lease, right-of-use asset, lease not yet commenced	69.2
Lessee, operating lease, lease not yet commenced, liability	$ 90.6
Maximum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, lease not yet commenced, term of contract	16 years

LEASES - Lease Expense (Details

LEASES - Lease Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Leases [Abstract]
Operating lease cost	$ 8	$ 7
Variable lease cost	1	1
Total lease cost	$ 9	$ 8

LEASES - Other Information (Det

LEASES - Other Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Leases [Abstract]
Operating cash flows from operating leases	$ 7	$ 7
Operating cash flows from finance leases	0	0
Operating lease, right-of-use assets obtained in exchange for lease obligations	2	0
Finance lease, right-of-use assets obtained in exchange for lease obligations	$ 4	$ 0
Operating lease, weighted average remaining lease term (in years)	9 years 8 months 8 days	9 years 4 months 20 days
Finance lease, weighted average remaining lease term (in years)	23 years 29 days	0 years
Operating lease, weighted average discount rate, percent	2.40%	2.60%
Finance lease, weighted average discount rate, percent	2.00%	0.00%

LEASES - Maturities (Details)

LEASES - Maturities (Details) $ in Millions	Mar. 31, 2022USD ($)
Operating Leases
2022	$ 20
2023	23
2024	21
2025	15
2026	12
Later years	75
Total lease payments	166
Less: imputed interest	(20)
Present value of lease liabilities	146
Finance Leases
2022	0
2023	1
2024	1
2025	1
2026	1
Later years	16
Total lease payments	20
Less: imputed interest	(4)
Present value of lease liabilities	15.7
Total Leases
2022	20
2023	24
2024	22
2025	16
2026	13
Later years	91
Total lease payments	186
Less: imputed interest	(24)
Present value of lease liabilities	$ 162

VARIABLE INTEREST ENTITIES - As

VARIABLE INTEREST ENTITIES - Assets and Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021
Variable Interest Entity [Line Items]
Assets	$ 42,022	$ 39,513	$ 38,475
Liabilities	36,583	34,363
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Assets	151	150
Liabilities	103	107
Maximum Exposure to Loss	150	149
Trust Preferred Securities | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Assets	1	1
Liabilities	67	67
Maximum Exposure to Loss	0	0
Affordable Housing Tax Credit Partnerships | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Assets	118	121
Liabilities	31	34
Maximum Exposure to Loss	118	121
Other Investments | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Assets	32	28
Liabilities	5	6
Maximum Exposure to Loss	$ 32	$ 28

VARIABLE INTEREST ENTITIES - Tr

VARIABLE INTEREST ENTITIES - Trust-Preferred Securities (Details)	3 Months Ended
	Mar. 31, 2022
Trust Preferred Securities | Maximum
Variable Interest Entity [Line Items]
Deferral period for payment of interest	5 years

VARIABLE INTEREST ENTITIES - Af

VARIABLE INTEREST ENTITIES - Affordable Housing Tax Credit Investments And Related Unfunded Commitments (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
LIHTC investments included in other assets	$ 87	$ 87
Unfunded LIHTC commitments	$ 31	$ 34

VARIABLE INTEREST ENTITIES - In

VARIABLE INTEREST ENTITIES - Income Statement Effect (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Provision for income taxes:
Amortization of LIHTC investments under proportional method	$ 4	$ 3
Low-income housing tax credits	(4)	(3)
Other tax benefits related to tax credit investments	(1)	(1)
Total impact on provision for income taxes	$ (1)	$ (1)

BORROWINGS - Summary of Short-T

BORROWINGS - Summary of Short-Term Borrowings (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Debt Disclosure [Abstract]
Securities sold under repurchase agreements	$ 363	$ 376
Federal Home Loan Bank advances	930	1,030
Subordinated notes	132	130
Total short-term borrowings	$ 1,425	$ 1,536

BORROWINGS - Additional Informa

BORROWINGS - Additional Information (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Short-term advances	$ 900,000,000	$ 1,000,000,000
Short-term advances, percentage bearing fixed interest rate	100.00%	100.00%
Subordinated notes	$ 68,000,000	$ 68,000,000
Other subordinated debt	274,000,000	248,000,000
Long-term borrowings	713,000,000	682,000,000
Howard
Debt Instrument [Line Items]
Subordinated notes	5,000,000
Other subordinated debt	25,000,000
FHLB
Debt Instrument [Line Items]
Credit available with FHLB	8,700,000,000
Credit with FHLB utilized	900,000,000
Long-term borrowings	$ 0	$ 0
Minimum | FHLB
Debt Instrument [Line Items]
Effective interest rates		0.26%
Maximum | FHLB
Debt Instrument [Line Items]
Effective interest rates		0.29%

BORROWINGS - Summary of Long-Te

BORROWINGS - Summary of Long-Term Borrowings (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Debt Disclosure [Abstract]
Senior notes	$ 299	$ 299
Subordinated notes	68	68
Junior subordinated debt	72	67
Other subordinated debt	274	248
Total long-term borrowings	$ 713	$ 682

BORROWINGS - Schedule of Subord

BORROWINGS - Schedule of Subordinated Debt (Details)	3 Months Ended
	Mar. 31, 2022USD ($)
Debt Instrument [Line Items]
Aggregate Principal Amount Issued	$ 583,000,000
Net Proceeds	586,000,000
Carrying Value	$ 573,000,000
2.20% Senior Notes due February 24, 2023
Debt Instrument [Line Items]
Interest Rate	2.20%
Aggregate Principal Amount Issued	$ 300,000,000
Net Proceeds	298,000,000
Carrying Value	$ 299,000,000
4.95% Fixed-To-Floating Rate Subordinated Notes due 2029
Debt Instrument [Line Items]
Interest Rate	4.95%
Aggregate Principal Amount Issued	$ 120,000,000
Net Proceeds	118,000,000
Carrying Value	$ 119,000,000
4.95% Fixed-To-Floating Rate Subordinated Notes due 2029 | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	2.40%
4.875% Subordinated Notes due 2025
Debt Instrument [Line Items]
Interest Rate	4.875%
Aggregate Principal Amount Issued	$ 100,000,000
Net Proceeds	98,000,000
Carrying Value	$ 99,000,000
7.625% Subordinated Notes due August 12, 2023
Debt Instrument [Line Items]
Interest Rate	7.625%
Aggregate Principal Amount Issued	$ 38,000,000
Net Proceeds	46,000,000
Carrying Value	$ 30,000,000
6.00% Fixed-To-Floating Rate Subordinated Notes due December 6, 2028
Debt Instrument [Line Items]
Interest Rate	6.00%
Aggregate Principal Amount Issued	$ 25,000,000
Net Proceeds	26,000,000
Carrying Value	$ 26,000,000
6.00% Fixed-To-Floating Rate Subordinated Notes due December 6, 2028 | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	3.02%

BORROWINGS - Junior Subordinate

BORROWINGS - Junior Subordinated Debt Trusts (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Subordinated Borrowing [Line Items]
Junior subordinated debt	$ 72	$ 67
Trust Preferred Securities
Subordinated Borrowing [Line Items]
Junior subordinated debt	77
Common Securities
Subordinated Borrowing [Line Items]
Junior subordinated debt	3
F.N.B. Statutory Trust II
Subordinated Borrowing [Line Items]
Junior subordinated debt	$ 22
Interest Rate	2.48%
F.N.B. Statutory Trust II | LIBOR
Subordinated Borrowing [Line Items]
Basis spread on variable rate	1.65%
F.N.B. Statutory Trust II | Trust Preferred Securities
Subordinated Borrowing [Line Items]
Junior subordinated debt	$ 22
F.N.B. Statutory Trust II | Common Securities
Subordinated Borrowing [Line Items]
Junior subordinated debt	1
Yadkin Valley Statutory Trust I
Subordinated Borrowing [Line Items]
Junior subordinated debt	$ 22
Interest Rate	2.15%
Yadkin Valley Statutory Trust I | LIBOR
Subordinated Borrowing [Line Items]
Basis spread on variable rate	1.32%
Yadkin Valley Statutory Trust I | Trust Preferred Securities
Subordinated Borrowing [Line Items]
Junior subordinated debt	$ 25
Yadkin Valley Statutory Trust I | Common Securities
Subordinated Borrowing [Line Items]
Junior subordinated debt	1
FNB Financial Services Capital Trust I
Subordinated Borrowing [Line Items]
Junior subordinated debt	$ 23
Interest Rate	2.46%
FNB Financial Services Capital Trust I | LIBOR
Subordinated Borrowing [Line Items]
Basis spread on variable rate	1.46%
FNB Financial Services Capital Trust I | Trust Preferred Securities
Subordinated Borrowing [Line Items]
Junior subordinated debt	$ 25
FNB Financial Services Capital Trust I | Common Securities
Subordinated Borrowing [Line Items]
Junior subordinated debt	1
Patapsco Statutory Trust I
Subordinated Borrowing [Line Items]
Junior subordinated debt	$ 5
Interest Rate	2.31%
Patapsco Statutory Trust I | LIBOR
Subordinated Borrowing [Line Items]
Basis spread on variable rate	1.48%
Patapsco Statutory Trust I | Trust Preferred Securities
Subordinated Borrowing [Line Items]
Junior subordinated debt	$ 5
Patapsco Statutory Trust I | Common Securities
Subordinated Borrowing [Line Items]
Junior subordinated debt	$ 0

DERIVATIVE INSTRUMENTS AND HE_3

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Notional Amounts and Gross Fair Values (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Derivatives, Fair Value [Line Items]
Notional amount	$ 14,098	$ 14,526
Derivative asset, not offset against collateral	14	3
Derivative liability, not offset against collateral	10	20
Derivative asset, not subject to master netting arrangement	46	182
Derivative liability, not subject to master netting arrangement	158	25
Fair value, asset	60	185
Fair value, liability	168	45
Interest rate contracts – designated
Derivatives, Fair Value [Line Items]
Derivative asset, not offset against collateral	0	1
Derivative liability, not offset against collateral	0	0
Interest rate swaps – not designated
Derivatives, Fair Value [Line Items]
Derivative asset, not offset against collateral	14	2
Derivative liability, not offset against collateral	10	20
Derivative asset, not subject to master netting arrangement	37	172
Derivative liability, not subject to master netting arrangement	145	24
Interest rate lock commitments – not designated
Derivatives, Fair Value [Line Items]
Derivative asset, not subject to master netting arrangement	0	9
Derivative liability, not subject to master netting arrangement	13	0
Forward delivery commitments – not designated
Derivatives, Fair Value [Line Items]
Derivative asset, not subject to master netting arrangement	9	1
Derivative liability, not subject to master netting arrangement	0	1
Credit risk contracts – not designated
Derivatives, Fair Value [Line Items]
Notional amount	249.8
Derivative asset, not subject to master netting arrangement	0	0
Derivative liability, not subject to master netting arrangement	0	0
Subject to master netting arrangements:
Derivatives, Fair Value [Line Items]
Notional amount	7,449	7,627
Subject to master netting arrangements: | Interest rate contracts – designated
Derivatives, Fair Value [Line Items]
Notional amount	1,980	2,080
Subject to master netting arrangements: | Interest rate swaps – not designated
Derivatives, Fair Value [Line Items]
Notional amount	5,469	5,547
Not subject to master netting arrangements:
Derivatives, Fair Value [Line Items]
Notional amount	6,649	6,899
Not subject to master netting arrangements: | Interest rate swaps – not designated
Derivatives, Fair Value [Line Items]
Notional amount	5,469	5,547
Not subject to master netting arrangements: | Interest rate lock commitments – not designated
Derivatives, Fair Value [Line Items]
Notional amount	381	482
Not subject to master netting arrangements: | Forward delivery commitments – not designated
Derivatives, Fair Value [Line Items]
Notional amount	435	502
Not subject to master netting arrangements: | Credit risk contracts – not designated
Derivatives, Fair Value [Line Items]
Notional amount	$ 364	$ 368

DERIVATIVE INSTRUMENTS AND HE_4

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Amounts Reclassified from AOCI (Details) - Interest rate contracts - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivatives	$ (19,000,000)	$ 5,000,000
Amount of Gain (Loss) Reclassified from AOCI into Income	0	0
Interest income (expense)
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Amount of Gain (Loss) Reclassified from AOCI into Income	(2,000,000)	(5,000,000)
Other income
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Amount of Gain (Loss) Reclassified from AOCI into Income	$ 0	$ 0

DERIVATIVE INSTRUMENTS AND HE_5

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Effect of Cash Flow Hedging on Income Statement (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Derivative [Line Items]
Interest Income - Loans and Leases	$ 221,000,000	$ 221,000,000
Interest Expense - Short-Term Borrowings	6,000,000	7,000,000
Interest rate contracts
Derivative [Line Items]
Amount of gain (loss) reclassified from AOCI into net income	0	0
Interest Income - Loans and Leases | Interest rate contracts
Derivative [Line Items]
Amount of gain (loss) reclassified from AOCI into net income	2,000,000	0
Interest Expense - Short-Term Borrowings | Interest rate contracts
Derivative [Line Items]
Amount of gain (loss) reclassified from AOCI into net income	$ (4,000,000)	$ (5,000,000)

DERIVATIVE INSTRUMENTS AND HE_6

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Derivative [Line Items]
Notional amount	$ 14,098,000,000		$ 14,526,000,000
Additional amount in excess of posted collateral required in case of breached agreements	100,000		200,000
Subject to Master Netting Arrangement
Derivative [Line Items]
Notional amount	$ 7,449,000,000		7,627,000,000
Interest rate contracts
Derivative [Line Items]
Maximum length of time hedged in interest rate cash flow hedge	3 years 6 months
Period to reclassification of cash flow hedge gain loss	12 months
Derivative gains to be reclassified within twelve months	$ 11,200,000
Derivative gains to be reclassified within twelve months, net of tax	8,700,000
Derivative gain or losses excluded from assessment of hedge effectiveness	0
Amount of gain (loss) reclassified from AOCI into net income	0	$ 0
Interest rate contracts | Subject to Master Netting Arrangement
Derivative [Line Items]
Notional amount	1,980,000,000		2,080,000,000
Credit risk contracts
Derivative [Line Items]
Notional amount	249,800,000
Maximum exposure under credit risk agreement assuming customer default	100,000		200,000
Credit risk derivatives, purchased at fair value	100,000		100,000
Credit risk derivatives, sold at fair value	$ 100,000		$ 200,000
Credit risk contracts | Minimum
Derivative [Line Items]
Risk participation agreements, term	4 months
Credit risk contracts | Maximum
Derivative [Line Items]
Risk participation agreements, term	19 years

DERIVATIVE INSTRUMENTS AND HE_7

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Effect of Derivative Financial Instruments on Income Statement (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Interest rate swaps | Non-interest income - other
Derivative [Line Items]
Derivative financial instrument, net	$ 0	$ 0
Interest rate lock commitments | Mortgage banking operations
Derivative [Line Items]
Derivative financial instrument, net	0	0
Forward delivery contracts | Mortgage banking operations
Derivative [Line Items]
Derivative financial instrument, net	9	9
Credit risk contracts | Non-interest income - other
Derivative [Line Items]
Derivative financial instrument, net	$ 0	$ 0

DERIVATIVE INSTRUMENTS AND HE_8

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Derivative Assets (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Derivative [Line Items]
Net Amount Presented in the Consolidated Balance Sheets	$ 14	$ 3
Financial Instruments	0	0
Cash Collateral	14	3
Net Amount	0	0
Interest rate contracts – designated
Derivative [Line Items]
Net Amount Presented in the Consolidated Balance Sheets	0	1
Financial Instruments		0
Cash Collateral		1
Net Amount		0
Interest rate swaps – not designated
Derivative [Line Items]
Net Amount Presented in the Consolidated Balance Sheets	14	2
Financial Instruments	0	0
Cash Collateral	14	2
Net Amount	$ 0	$ 0

DERIVATIVE INSTRUMENTS AND HE_9

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Derivative Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Derivative [Line Items]
Net Amount Presented in the Consolidated Balance Sheets	$ 10	$ 20
Financial Instruments	0	0
Cash Collateral	10	20
Net Amount	0	0
Interest rate swaps – not designated
Derivative [Line Items]
Net Amount Presented in the Consolidated Balance Sheets	10	20
Financial Instruments	0	0
Cash Collateral	10	20
Net Amount	$ 0	$ 0

COMMITMENTS, CREDIT RISK AND _3

COMMITMENTS, CREDIT RISK AND CONTINGENCIES - Off-Balance Sheet Credit Risk (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Standby letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Extended credit and standby letters of credit	$ 204	$ 194
Commitments to extend credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Extended credit and standby letters of credit	$ 12,069	$ 11,228

COMMITMENTS, CREDIT RISK AND _4

COMMITMENTS, CREDIT RISK AND CONTINGENCIES - Additional Information (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Percentage of commitments to extend credit dependent upon the financial condition of the customers	72.90%
Allowance for credit losses on loan commitments that are not unconditionally cancellable	$ 18.8	$ 19.2

STOCK INCENTIVE PLANS - Additio

STOCK INCENTIVE PLANS - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares available up to (in shares)	3,909,215
Unrecognized compensation expense	$ 8
Shares, options outstanding and exercisable (in shares)	176,602	182,747
Weighted average exercise price, options outstanding (in dollars per share)	$ 8.96	$ 8.86
Intrinsic value of outstanding and exercisable stock options	$ 0.6
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of units issued, years	3 years
Restricted stock awards issued (in shares)	495,844	542,136
Unrecognized compensation expense	$ 7.5
Amount subject to accelerated vesting under Incentive Compensation Plan	0.9
Performance- Based Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	$ 1
Performance- Based Units | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards issued (in shares)	297,508	325,284

STOCK INCENTIVE PLANS - Restric

STOCK INCENTIVE PLANS - Restricted Stock Units Activity (Details) - $ / shares	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Units
Shares, unvested units outstanding at end of period (in shares)	5,049,014
Restricted Stock
Units
Shares, unvested units outstanding at beginning of period (in shares)	4,680,786	4,322,115
Shares, granted (in shares)	495,844	542,136
Shares, acquired (in shares)	60,300	0
Shares, net adjustment due to performance (in shares)	0	327,256
Shares, vested (in shares)	(216,373)	(142,687)
Shares, forfeited/expired/canceled (in shares)	(18,239)	(8,334)
Shares, dividend reinvestment (in shares)	46,696	42,310
Shares, unvested units outstanding at end of period (in shares)	5,049,014	5,082,796
Weighted Average Grant Price per Share
Weighted average grant price, invested units outstanding at beginning of period (in dollars per share)	$ 9.71	$ 9.46
Weighted average grant price, granted (in dollars per share)	14.22	12.61
Weighted average grant price, acquired (in dollars per share)	9.41	0
Weighted average grant price, net adjusted due to performance (in dollars per share)	0	11.84
Weighted average grant price, vested (in dollars per share)	8.77	7.29
Weighted average grant price, forfeited/expired/canceled (in dollars per share)	9.34	7.52
Weighted average grant price, dividend reinvestment (in dollars per share)	12.85	13.43
Weighted average grant price, invested units outstanding at end of period (in dollars per share)	$ 10.22	$ 10.05

STOCK INCENTIVE PLANS - Schedul

STOCK INCENTIVE PLANS - Schedule of Certain Information Related to Restricted Stock Units (Details) - Restricted Stock - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 9	$ 12
Tax benefit related to stock-based compensation expense	2	3
Fair value of units vested	$ 3	$ 1

STOCK INCENTIVE PLANS - Compone

STOCK INCENTIVE PLANS - Components of Restricted Stock Units (Details) $ in Millions	3 Months Ended
	Mar. 31, 2022USD ($)shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted stock units (in shares) | shares	5,049,014
Unrecognized compensation expense	$ 8
Intrinsic value	$ 63
Weighted average remaining life (in years)	1 year 7 months 17 days
Service- Based Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted stock units (in shares) | shares	2,971,430
Unrecognized compensation expense	$ 7
Intrinsic value	$ 37
Weighted average remaining life (in years)	1 year 8 months 15 days
Performance- Based Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted stock units (in shares) | shares	2,077,584
Unrecognized compensation expense	$ 1
Intrinsic value	$ 26
Weighted average remaining life (in years)	1 year 6 months 7 days

INCOME TAXES - Income Tax Expen

INCOME TAXES - Income Tax Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Tax Disclosure [Abstract]
Current income taxes: Federal taxes	$ 7	$ 21
Current income taxes: State taxes	2	2
Total current income taxes	9	23
Deferred income taxes: Federal taxes	5	(1)
Total deferred income taxes	5	(1)
Income taxes	$ 14	$ 22
Statutory tax rate	21.00%	21.00%
Effective tax rate	20.90%	18.90%

INCOME TAXES - Additional Infor

INCOME TAXES - Additional Information (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Deferred tax assets	$ 103.5	$ 43.4

OTHER COMPREHENSIVE INCOME (L_3

OTHER COMPREHENSIVE INCOME (LOSS) - Changes in AOCI (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 5,150	$ 4,959
Other comprehensive (loss) income before reclassifications	(142)
Amounts reclassified from AOCI	2
Other Comprehensive Income (Loss)	(140)	(12)
Balance at end of period	5,439	4,974
Unrealized Net Gains (Losses) on Debt Securities Available for Sale
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	8
Other comprehensive (loss) income before reclassifications	(128)
Amounts reclassified from AOCI	0
Other Comprehensive Income (Loss)	(128)
Balance at end of period	(120)
Unrealized Net Gains (Losses) on Derivative Instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(22)
Other comprehensive (loss) income before reclassifications	(15)
Amounts reclassified from AOCI	2
Other Comprehensive Income (Loss)	(13)
Balance at end of period	(35)
Unrecognized Pension and Postretirement Obligations
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(48)
Other comprehensive (loss) income before reclassifications	1
Amounts reclassified from AOCI	0
Other Comprehensive Income (Loss)	1
Balance at end of period	(47)
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(62)	(39)
Balance at end of period	$ (202)	$ (51)

EARNINGS PER COMMON SHARE - Com

EARNINGS PER COMMON SHARE - Computation of Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share [Abstract]
Net income	$ 53	$ 93
Less: Preferred stock dividends	2	2
Net income available to common stockholders	51	91
Net income available to common stockholders	$ 51	$ 91
Basic weighted average common shares outstanding (in shares)	344,352,853	320,975,209
Net effect of dilutive stock options, warrants and restricted stock (in shares)	4,573,193	3,769,650
Diluted weighted average common shares outstanding (in shares)	348,926,046	324,744,859
Earnings per common share:
Basic (in dollars per share)	$ 0.15	$ 0.28
Diluted (in dollars per share)	$ 0.15	$ 0.28

EARNINGS PER COMMON SHARE - Ave

EARNINGS PER COMMON SHARE - Average Shares Excluded from Earnings Per Common Share (Details) - shares	1 Months Ended	3 Months Ended
	Jan. 31, 2022	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share [Abstract]
Average shares excluded from the diluted earnings per common share calculation (in shares)		0	0
Howard
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of shares issued (in shares)	34,100,000

CASH FLOW INFORMATION - Summary

CASH FLOW INFORMATION - Summary of Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Supplemental Cash Flow Elements [Abstract]
Interest paid on deposits and other borrowings	$ 21	$ 32
Income taxes paid	0	5
Transfers of loans to other real estate owned	$ 1	$ 0

CASH FLOW INFORMATION - Additio

CASH FLOW INFORMATION - Additional Information (Details) - USD ($)	Mar. 31, 2022	Mar. 31, 2021
Supplemental Cash Flow Elements [Abstract]
Restricted cash	$ 0	$ 0

BUSINESS SEGMENTS - Additional

BUSINESS SEGMENTS - Additional Information (Details)	3 Months Ended
	Mar. 31, 2022segment
Segment Reporting [Abstract]
Number of reportable segments	3

BUSINESS SEGMENTS - Financial I

BUSINESS SEGMENTS - Financial Information for Segments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Segment Reporting Information [Line Items]
Interest income	$ 254	$ 251
Interest expense	20	28
Net Interest Income	234	223
Provision for credit losses	18	6
Non-interest income	78	83
Non-interest expense	224	182
Amortization of intangibles	3	3
Income tax expense (benefit)	14	22
Net income (loss)	53	93
Total assets	42,022	38,475	$ 39,513
Total intangibles	2,493	2,313
Operating Segments | Community Banking
Segment Reporting Information [Line Items]
Interest income	253	251
Interest expense	17	25
Net Interest Income	236	226
Provision for credit losses	17	6
Non-interest income	56	63
Non-interest expense	207	165
Amortization of intangibles	3	3
Income tax expense (benefit)	14	22
Net income (loss)	51	93
Total assets	41,896	38,360
Total intangibles	2,457	2,276
Operating Segments | Wealth Management
Segment Reporting Information [Line Items]
Interest income	0	0
Interest expense	0	0
Net Interest Income	0	0
Provision for credit losses	0	0
Non-interest income	16	15
Non-interest expense	11	10
Amortization of intangibles	0	0
Income tax expense (benefit)	1	1
Net income (loss)	4	4
Total assets	38	40
Total intangibles	9	9
Operating Segments | Insurance
Segment Reporting Information [Line Items]
Interest income	0	0
Interest expense	0	0
Net Interest Income	0	0
Provision for credit losses	0	0
Non-interest income	7	6
Non-interest expense	5	5
Amortization of intangibles	0	0
Income tax expense (benefit)	0	0
Net income (loss)	2	1
Total assets	33	34
Total intangibles	27	28
Parent and Other
Segment Reporting Information [Line Items]
Interest income	1	0
Interest expense	3	3
Net Interest Income	(2)	(3)
Provision for credit losses	1	0
Non-interest income	(1)	(1)
Non-interest expense	1	2
Amortization of intangibles	0	0
Income tax expense (benefit)	(1)	(1)
Net income (loss)	(4)	(5)
Total assets	55	41
Total intangibles	$ 0	$ 0

FAIR VALUE MEASUREMENTS - Asset

FAIR VALUE MEASUREMENTS - Assets and Liabilities on Recurring Basis (Details) - USD ($) $ in Millions		Mar. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		$ 3,446	$ 3,426
Loans held for sale	[1]	214	269
Derivative assets		60	185
Derivative liabilities		168	45
U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		194	204
U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		141	155
U.S. government-sponsored entities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		204	192
Agency mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		1,387	1,357
Agency collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		1,169	1,186
Commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		308	297
States of the U.S. and political subdivisions (municipals)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		31	33
Other debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		12	2
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		194	204
Derivative assets		0	0
Derivative liabilities		0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		3,250	3,222
Derivative assets		60	176
Derivative liabilities		155	45
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		2	0
Derivative assets		0	9
Derivative liabilities		13	0
Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		3,446	3,426
Loans held for sale		214	269
Derivative assets		60	185
Total assets measured at fair value on a recurring basis		3,720	3,880
Derivative liabilities		168	45
Total liabilities measured at fair value on a recurring basis		168	45
Fair Value, Recurring | U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		194	204
Fair Value, Recurring | U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		141	155
Fair Value, Recurring | U.S. government-sponsored entities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		204	192
Fair Value, Recurring | Agency mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		1,387	1,357
Fair Value, Recurring | Agency collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		1,169	1,186
Fair Value, Recurring | Commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		308	297
Fair Value, Recurring | States of the U.S. and political subdivisions (municipals)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		31	33
Fair Value, Recurring | Other debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		12	2
Fair Value, Recurring | Trading
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities		155	44
Fair Value, Recurring | Not for trading
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities		13	1
Fair Value, Recurring | Trading
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		51	174
Fair Value, Recurring | Not for trading
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		9	11
Fair Value, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		194	204
Loans held for sale		0	0
Derivative assets		0	0
Total assets measured at fair value on a recurring basis		194	204
Derivative liabilities		0	0
Total liabilities measured at fair value on a recurring basis		0	0
Fair Value, Recurring | Level 1 | U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		194	204
Fair Value, Recurring | Level 1 | U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		0	0
Fair Value, Recurring | Level 1 | U.S. government-sponsored entities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		0	0
Fair Value, Recurring | Level 1 | Agency mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		0	0
Fair Value, Recurring | Level 1 | Agency collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		0	0
Fair Value, Recurring | Level 1 | Commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		0	0
Fair Value, Recurring | Level 1 | States of the U.S. and political subdivisions (municipals)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		0	0
Fair Value, Recurring | Level 1 | Other debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		0	0
Fair Value, Recurring | Level 1 | Trading
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities		0	0
Fair Value, Recurring | Level 1 | Not for trading
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities		0	0
Fair Value, Recurring | Level 1 | Trading
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		0	0
Fair Value, Recurring | Level 1 | Not for trading
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		0	0
Fair Value, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		3,250	3,222
Loans held for sale		214	269
Derivative assets		60	176
Total assets measured at fair value on a recurring basis		3,524	3,667
Derivative liabilities		155	45
Total liabilities measured at fair value on a recurring basis		155	45
Fair Value, Recurring | Level 2 | U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		0	0
Fair Value, Recurring | Level 2 | U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		141	155
Fair Value, Recurring | Level 2 | U.S. government-sponsored entities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		204	192
Fair Value, Recurring | Level 2 | Agency mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		1,387	1,357
Fair Value, Recurring | Level 2 | Agency collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		1,169	1,186
Fair Value, Recurring | Level 2 | Commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		308	297
Fair Value, Recurring | Level 2 | States of the U.S. and political subdivisions (municipals)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		31	33
Fair Value, Recurring | Level 2 | Other debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		10	2
Fair Value, Recurring | Level 2 | Trading
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities		155	44
Fair Value, Recurring | Level 2 | Not for trading
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities		0	1
Fair Value, Recurring | Level 2 | Trading
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		51	174
Fair Value, Recurring | Level 2 | Not for trading
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		9	2
Fair Value, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		2	0
Loans held for sale		0	0
Derivative assets		0	9
Total assets measured at fair value on a recurring basis		2	9
Derivative liabilities		13	0
Total liabilities measured at fair value on a recurring basis		13	0
Fair Value, Recurring | Level 3 | U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		0	0
Fair Value, Recurring | Level 3 | U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		0	0
Fair Value, Recurring | Level 3 | U.S. government-sponsored entities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		0	0
Fair Value, Recurring | Level 3 | Agency mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		0	0
Fair Value, Recurring | Level 3 | Agency collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		0	0
Fair Value, Recurring | Level 3 | Commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		0	0
Fair Value, Recurring | Level 3 | States of the U.S. and political subdivisions (municipals)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		0	0
Fair Value, Recurring | Level 3 | Other debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available for sale		2	0
Fair Value, Recurring | Level 3 | Trading
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities		0	0
Fair Value, Recurring | Level 3 | Not for trading
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities		13	0
Fair Value, Recurring | Level 3 | Trading
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		0	0
Fair Value, Recurring | Level 3 | Not for trading
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		$ 0	$ 9
[1]	Amount represents loans for which we have elected the fair value option. See Note 19.

FAIR VALUE MEASUREMENTS - Rollf

FAIR VALUE MEASUREMENTS - Rollforward on Recurring Basis (Details) - Fair Value, Recurring - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$ 9	$ 24
Purchases, issuances, sales and settlements:
Purchases	2
Issuances		9
Settlements	(9)	(24)
Balance at end of period	2	9
Other debt securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	0	0
Purchases, issuances, sales and settlements:
Purchases	2
Issuances		0
Settlements	0	0
Balance at end of period	2	0
Interest rate lock commitments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	9	24
Purchases, issuances, sales and settlements:
Purchases	0
Issuances		9
Settlements	(9)	(24)
Balance at end of period	$ 0	$ 9

FAIR VALUE MEASUREMENTS - Addit

FAIR VALUE MEASUREMENTS - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Fair Value Measurements Disclosure [Line Items]
Transfer of equity security to non-marketable equity securities, included in other assets	$ 0	$ 0
Collateral dependent loans, allowance for credit loss	10,900,000
Provision for fair value measurements included in allowance for loan losses	2,400,000
Fair Value, Nonrecurring
Fair Value Measurements Disclosure [Line Items]
Collateral dependent loans carrying value	25,000,000
Carrying amount of OREO	1,900,000
Valuation allowance of OREO	200,000
Loss from OREO included in earnings	200,000
Mortgage Servicing Rights | Fair Value, Nonrecurring
Fair Value Measurements Disclosure [Line Items]
Servicing asset	1,500,000
Valuation allowance for impairment of recognized servicing assets, additions (deductions) for expenses (recoveries)	200,000
Mortgage Servicing Rights | Fair Value, Nonrecurring | Provision Expense
Fair Value Measurements Disclosure [Line Items]
Valuation allowance for impairment of recognized servicing assets, deductions for recoveries	2,300,000
SBA-Guaranteed Loan Servicing | Fair Value, Nonrecurring
Fair Value Measurements Disclosure [Line Items]
Servicing asset	3,100,000
Valuation allowance for impairment of recognized servicing assets, additions (deductions) for expenses (recoveries)	1,100,000
Valuation allowance for impairment of recognized servicing assets, deductions for recoveries	$ 0

FAIR VALUE MEASUREMENTS - Non-R

FAIR VALUE MEASUREMENTS - Non-Recurring Basis Assets (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other asset	$ 0	$ 0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other asset	0	0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other asset	61	49
Fair Value, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent loans	25	20
Other real estate owned	2	2
Fair Value, Nonrecurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent loans	0	0
Other real estate owned	0	0
Fair Value, Nonrecurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent loans	0	0
Other real estate owned	0	0
Fair Value, Nonrecurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent loans	25	20
Other real estate owned	2	2
Mortgage Servicing Rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other asset	58.2	46	$ 40.2	$ 35.6
Mortgage Servicing Rights | Fair Value, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other asset	2	10
Mortgage Servicing Rights | Fair Value, Nonrecurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other asset	0	0
Mortgage Servicing Rights | Fair Value, Nonrecurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other asset	0	0
Mortgage Servicing Rights | Fair Value, Nonrecurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other asset	2	10
SBA-Guaranteed Loan Servicing | Fair Value, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other asset	3	3
SBA-Guaranteed Loan Servicing | Fair Value, Nonrecurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other asset	0	0
SBA-Guaranteed Loan Servicing | Fair Value, Nonrecurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other asset	0	0
SBA-Guaranteed Loan Servicing | Fair Value, Nonrecurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other asset	$ 3	$ 3

FAIR VALUE MEASUREMENTS - Finan

FAIR VALUE MEASUREMENTS - Financial Instruments (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available for sale	$ 3,446	$ 3,426
Debt securities held to maturity	3,364	3,506
Derivative assets	60	185
Long-term borrowings	573
Derivative liabilities	168	45
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	3,857	3,493
Debt securities, available for sale	3,446	3,426
Debt securities held to maturity	3,513	3,463
Net loans and leases, including loans held for sale	26,721	24,919
Loan servicing rights	49	47
Derivative assets	60	185
Accrued interest receivable	80	76
Deposits	33,904	31,726
Short-term borrowings	1,425	1,536
Long-term borrowings	713	682
Derivative liabilities	168	45
Accrued interest payable	8	10
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	3,857	3,493
Debt securities, available for sale	3,446	3,426
Debt securities held to maturity	3,364	3,506
Net loans and leases, including loans held for sale	26,076	24,518
Loan servicing rights	61	49
Derivative assets	60	185
Accrued interest receivable	80	76
Deposits	33,864	31,725
Short-term borrowings	1,420	1,536
Long-term borrowings	722	704
Derivative liabilities	168	45
Accrued interest payable	8	10
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	3,857	3,493
Debt securities, available for sale	194	204
Debt securities held to maturity	0	0
Net loans and leases, including loans held for sale	0	0
Loan servicing rights	0	0
Derivative assets	0	0
Accrued interest receivable	80	76
Deposits	30,955	28,867
Short-term borrowings	1,420	1,536
Long-term borrowings	0	0
Derivative liabilities	0	0
Accrued interest payable	8	10
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Debt securities, available for sale	3,250	3,222
Debt securities held to maturity	3,359	3,506
Net loans and leases, including loans held for sale	214	269
Loan servicing rights	0	0
Derivative assets	60	176
Accrued interest receivable	0	0
Deposits	2,909	2,858
Short-term borrowings	0	0
Long-term borrowings	0	0
Derivative liabilities	155	45
Accrued interest payable	0	0
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Debt securities, available for sale	2	0
Debt securities held to maturity	5	0
Net loans and leases, including loans held for sale	25,862	24,249
Loan servicing rights	61	49
Derivative assets	0	9
Accrued interest receivable	0	0
Deposits	0	0
Short-term borrowings	0	0
Long-term borrowings	722	704
Derivative liabilities	13	0
Accrued interest payable	$ 0	$ 0