$FNB
FNB CORP/PA/ Stock $fnb

$fnb Overview Financials Valuation SEC Filings Company Website

2021 Q1 Form 10-Q Financial Statement

#000003780821000015 Filed on May 06, 2021

Income Statement

Concept	2021 Q1	2020 Q1
Revenue	$251.0M	$306.0M
YoY Change	-17.97%	-1.29%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$1.000M	$4.000M
YoY Change	-75.0%	-42.86%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$28.00M	$74.00M
YoY Change	-62.16%	-6.33%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$115.0M	$58.00M
YoY Change	98.28%	-50.0%
Income Tax	$22.00M	$11.00M
% Of Pretax Income	19.13%	18.97%
Net Earnings	$93.00M	$47.00M
YoY Change	97.87%	-50.0%
Net Earnings / Revenue	37.05%	15.36%
Basic Earnings Per Share	$0.28	$0.14
Diluted Earnings Per Share	$0.28	$0.14
COMMON SHARES
Basic Shares Outstanding	321.0M shares	324.2M shares
Diluted Shares Outstanding	324.7M shares	326.0M shares

Balance Sheet

Concept	2021 Q1	2020 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$2.668B	$564.0M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$330.0M	$331.0M
YoY Change	-0.3%	0.61%
Goodwill	$2.262B	$2.262B
YoY Change	0.0%	0.31%
Intangibles	$51.00M	$64.00M
YoY Change	-20.31%	-14.67%
Long-Term Investments
YoY Change
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$38.48B	$35.05B
YoY Change	9.77%	4.02%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$130.0M	$131.0M
YoY Change	-0.76%	8.26%
Deferred Revenue
YoY Change
Short-Term Debt	$1.687B	$3.443B
YoY Change	-51.0%	-16.25%
Long-Term Debt Due	$122.0M	$107.0M
YoY Change	14.02%	-2.73%
Total Short-Term Liabilities	$252.0M	$238.0M
YoY Change	5.88%	3.03%
LONG-TERM LIABILITIES
Long-Term Debt	$691.0M	$1.001B
YoY Change	-30.97%	128.54%
Other Long-Term Liabilities	$239.0M	$254.0M
YoY Change	-5.91%	11.4%
Total Long-Term Liabilities	$930.0M	$1.255B
YoY Change	-25.9%	88.44%
TOTAL LIABILITIES
Total Short-Term Liabilities	$252.0M	$238.0M
Total Long-Term Liabilities	$930.0M	$1.255B
Total Liabilities	$33.50B	$30.21B
YoY Change	10.9%	4.11%
SHAREHOLDERS EQUITY
Retained Earnings	$921.0M	$754.0M
YoY Change	22.15%	19.87%
Common Stock	$4.102B	$4.078B
YoY Change	0.59%	0.57%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$105.0M	$52.00M
YoY Change	101.92%	126.09%
Treasury Stock Shares	9.517M shares	4.584M shares
Shareholders Equity	$4.974B	$4.842B
YoY Change
Total Liabilities & Shareholders Equity	$38.48B	$35.05B
YoY Change	9.77%	4.02%

Cashflow Statement

Concept	2021 Q1	2020 Q1
OPERATING ACTIVITIES
Net Income	$93.00M	$47.00M
YoY Change	97.87%	-50.0%
Depreciation, Depletion And Amortization	$1.000M	$4.000M
YoY Change	-75.0%	-42.86%
Cash From Operating Activities	$215.0M	-$205.0M
YoY Change	-204.88%	-1305.88%
INVESTING ACTIVITIES
Capital Expenditures	$8.000M	$8.000M
YoY Change	0.0%	-20.0%
Acquisitions
YoY Change
Other Investing Activities	$32.00M	-$244.0M
YoY Change	-113.11%	-41.63%
Cash From Investing Activities	$24.00M	-$252.0M
YoY Change	-109.52%	-41.12%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$36.00M	$25.00M
YoY Change	44.0%	-2600.0%
Debt Paid & Issued, Net	$7.000M	$15.00M
YoY Change	-53.33%	-91.62%
Cash From Financing Activities	$1.046B	$422.0M
YoY Change	147.87%	0.48%
NET CHANGE
Cash From Operating Activities	$215.0M	-$205.0M
Cash From Investing Activities	$24.00M	-$252.0M
Cash From Financing Activities	$1.046B	$422.0M
Net Change In Cash	$1.285B	-$35.00M
YoY Change	-3771.43%	-488.89%
FREE CASH FLOW
Cash From Operating Activities	$215.0M	-$205.0M
Capital Expenditures	$8.000M	$8.000M
Free Cash Flow	$207.0M	-$213.0M
YoY Change	-197.18%	-3142.86%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021Q1	dei	Amendment Flag AmendmentFlag	false
CY2021Q1	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021Q1	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q1
CY2021Q1	dei	Entity Registrant Name EntityRegistrantName	FNB CORP/PA/
CY2021Q1	dei	Entity Central Index Key EntityCentralIndexKey	0000037808
CY2021Q1	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2021Q1	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	us-gaap:OtherAssets
CY2021Q1	us-gaap	Operating Lease Liability Statement Of Financial Position Extensible List OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList	us-gaap:OtherLiabilities
CY2021Q1	dei	Document Type DocumentType	10-Q
CY2021Q1	dei	Document Quarterly Report DocumentQuarterlyReport	true
CY2021Q1	dei	Document Period End Date DocumentPeriodEndDate	2021-03-31
CY2021Q1	dei	Document Transition Report DocumentTransitionReport	false
CY2021Q1	dei	Entity File Number EntityFileNumber	001-31940
CY2021Q1	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	PA
CY2021Q1	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	25-1255406
CY2021Q1	dei	Entity Address Address Line1 EntityAddressAddressLine1	One North Shore Center,
CY2021Q1	dei	Entity Address Address Line2 EntityAddressAddressLine2	12 Federal Street,
CY2021Q1	dei	Entity Address City Or Town EntityAddressCityOrTown	Pittsburgh,
CY2021Q1	dei	Entity Address State Or Province EntityAddressStateOrProvince	PA
CY2021Q1	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	15212
CY2021Q1	dei	City Area Code CityAreaCode	800
CY2021Q1	dei	Local Phone Number LocalPhoneNumber	555-5455
CY2021Q1	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2021Q1	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2021Q1	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2021Q1	dei	Entity Small Business EntitySmallBusiness	false
CY2021Q1	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2021Q1	dei	Entity Shell Company EntityShellCompany	false
CY2021Q2	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	319385342	shares
CY2021Q1	us-gaap	Cash And Due From Banks CashAndDueFromBanks	339000000	USD
CY2020Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	369000000	USD
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CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	332000000	USD
CY2021Q1	us-gaap	Goodwill Goodwill	2262000000	USD
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CY2021Q1	us-gaap	Long Term Debt LongTermDebt	1091000000	USD
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CY2020Q4	us-gaap	Other Liabilities OtherLiabilities	374000000	USD
CY2021Q1	us-gaap	Liabilities Liabilities	33501000000	USD
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CY2020Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2021Q1	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2021Q1	us-gaap	Preferred Stock Liquidation Preference PreferredStockLiquidationPreference	1000
CY2020Q4	us-gaap	Preferred Stock Liquidation Preference PreferredStockLiquidationPreference	1000
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CY2021Q1	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	110877	shares
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CY2021Q1	us-gaap	Preferred Stock Value PreferredStockValue	107000000	USD
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CY2020Q1	us-gaap	Other Noninterest Expense OtherNoninterestExpense	24000000	USD
CY2021Q1	us-gaap	Noninterest Expense NoninterestExpense	185000000	USD
CY2020Q1	us-gaap	Noninterest Expense NoninterestExpense	195000000	USD
CY2021Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	115000000	USD
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CY2020Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11000000	USD
CY2021Q1	us-gaap	Net Income Loss NetIncomeLoss	93000000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	47000000	USD
CY2021Q1	us-gaap	Dividends Preferred Stock DividendsPreferredStock	2000000	USD
CY2020Q1	us-gaap	Dividends Preferred Stock DividendsPreferredStock	2000000	USD
CY2021Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	91000000	USD
CY2020Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	45000000	USD
CY2021Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.28
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.14
CY2021Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.28
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CY2021Q1	us-gaap	Net Income Loss NetIncomeLoss	93000000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	47000000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-6000000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	15000000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-21000000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	53000000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	1000000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	-10000000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	4000000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-35000000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	-1000000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	0	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-4000000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-1000000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	0	USD
CY2020Q1	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	0	USD
CY2021Q1	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	1000000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	1000000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-12000000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	20000000	USD
CY2021Q1	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	81000000	USD
CY2020Q1	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	67000000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	4883000000	USD
CY2020Q1	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	67000000	USD
CY2020Q1	us-gaap	Preferred Stock Dividends Per Share Cash Paid PreferredStockDividendsPerShareCashPaid	18.13
CY2020Q1	us-gaap	Dividends Preferred Stock DividendsPreferredStock	2000000	USD
CY2020Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.12
CY2020Q1	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	39000000	USD
CY2020Q1	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	25000000	USD
CY2020Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	8000000	USD
CY2020Q1	us-gaap	Stockholders Equity StockholdersEquity	4842000000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	4959000000	USD
CY2021Q1	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	81000000	USD
CY2021Q1	us-gaap	Preferred Stock Dividends Per Share Cash Paid PreferredStockDividendsPerShareCashPaid	18.13
CY2021Q1	us-gaap	Dividends Preferred Stock DividendsPreferredStock	2000000	USD
CY2021Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.12
CY2021Q1	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	39000000	USD
CY2021Q1	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	0	USD
CY2021Q1	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	36000000	USD
CY2021Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	11000000	USD
CY2021Q1	us-gaap	Stockholders Equity StockholdersEquity	4974000000	USD
CY2021Q1	us-gaap	Net Income Loss NetIncomeLoss	93000000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	47000000	USD
CY2021Q1	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	1000000	USD
CY2020Q1	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	4000000	USD
CY2021Q1	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	6000000	USD
CY2020Q1	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	48000000	USD
CY2021Q1	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	-1000000	USD
CY2020Q1	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	2000000	USD
CY2021Q1	us-gaap	Payments To Purchase Loans Held For Sale PaymentsToPurchaseLoansHeldForSale	566000000	USD
CY2020Q1	us-gaap	Payments To Purchase Loans Held For Sale PaymentsToPurchaseLoansHeldForSale	301000000	USD
CY2021Q1	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	550000000	USD
CY2020Q1	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	275000000	USD
CY2021Q1	fnb	Gain Loss On Sale Of Financing Receivables GainLossOnSaleOfFinancingReceivables	16000000	USD
CY2020Q1	fnb	Gain Loss On Sale Of Financing Receivables GainLossOnSaleOfFinancingReceivables	5000000	USD
CY2021Q1	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-1000000	USD
CY2020Q1	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-21000000	USD
CY2021Q1	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-4000000	USD
CY2020Q1	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-2000000	USD
CY2021Q1	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	0	USD
CY2020Q1	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	2000000	USD
CY2021Q1	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-151000000	USD
CY2020Q1	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	292000000	USD
CY2021Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	215000000	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-205000000	USD
CY2021Q1	fnb	Payments For Proceeds From Financing Receivables PaymentsForProceedsFromFinancingReceivables	59000000	USD
CY2020Q1	fnb	Payments For Proceeds From Financing Receivables PaymentsForProceedsFromFinancingReceivables	500000000	USD
CY2021Q1	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	567000000	USD
CY2020Q1	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	54000000	USD
CY2021Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	835000000	USD
CY2020Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	215000000	USD
CY2021Q1	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	365000000	USD
CY2020Q1	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	59000000	USD
CY2021Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	188000000	USD
CY2020Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	154000000	USD
CY2021Q1	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	8000000	USD
CY2020Q1	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	8000000	USD
CY2021Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	24000000	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-252000000	USD
CY2021Q1	us-gaap	Increase Decrease In Demand Deposits IncreaseDecreaseInDemandDeposits	1510000000	USD
CY2020Q1	us-gaap	Increase Decrease In Demand Deposits IncreaseDecreaseInDemandDeposits	126000000	USD
CY2021Q1	us-gaap	Increase Decrease In Time Deposits IncreaseDecreaseInTimeDeposits	-278000000	USD
CY2020Q1	us-gaap	Increase Decrease In Time Deposits IncreaseDecreaseInTimeDeposits	-166000000	USD
CY2021Q1	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-117000000	USD
CY2020Q1	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	228000000	USD
CY2021Q1	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	4000000	USD
CY2020Q1	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	307000000	USD
CY2021Q1	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	7000000	USD
CY2020Q1	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	15000000	USD
CY2021Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	36000000	USD
CY2020Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	25000000	USD
CY2021Q1	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	2000000	USD
CY2020Q1	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	2000000	USD
CY2021Q1	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	39000000	USD
CY2020Q1	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	39000000	USD
CY2021Q1	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	11000000	USD
CY2020Q1	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	8000000	USD
CY2021Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1046000000	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	422000000	USD
CY2021Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	1285000000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-35000000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1383000000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	599000000	USD
CY2021Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2668000000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	564000000	USD
CY2021Q1	us-gaap	Nature Of Operations NatureOfOperations	<div style="margin-top:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">NATURE OF OPERATIONS</span></div><div style="margin-top:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">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.; and Charlotte, Raleigh, Durham and the Piedmont Triad (Winston-Salem, Greensboro and High Point) in North Carolina. As of March 31, 2021, we had 337 banking offices throughout Pennsylvania, Ohio, Maryland, West Virginia, North Carolina, South Carolina, Washington D.C. and Virginia. </span></div>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.
CY2021Q1	us-gaap	Number Of States In Which Entity Operates NumberOfStatesInWhichEntityOperates	7	State
CY2021Q1	fnb	Number Of Banking Offices NumberOfBankingOffices	337	Office
CY2021Q1	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-top:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Use of Estimates</span></div><div style="margin-top:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">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 </span><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a href="https://www.sec.gov/ix?doc=/Archives/edgar/data/0000037808/000003780821000011/fnb-20201231.htm" style="-sec-extract:exhibit;color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">2020 Annual Report on Form 10-K</a></span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">.</span></div>
CY2021Q1	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	0	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	0	USD
CY2021Q1	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	3110000000	USD
CY2021Q1	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	66000000	USD
CY2021Q1	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	10000000	USD
CY2021Q1	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	3166000000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	3380000000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	84000000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	1000000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	3463000000	USD
CY2021Q1	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	3043000000	USD
CY2021Q1	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	79000000	USD
CY2021Q1	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	8000000	USD
CY2021Q1	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	3114000000	USD
CY2020Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	2868000000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	105000000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	0	USD
CY2020Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	2973000000	USD
CY2021Q1	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	185000000	USD
CY2021Q1	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	186000000	USD
CY2021Q1	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	100000000	USD
CY2021Q1	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	101000000	USD
CY2021Q1	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	70000000	USD
CY2021Q1	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	69000000	USD
CY2021Q1	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	21000000	USD
CY2021Q1	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	21000000	USD
CY2021Q1	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	127000000	USD
CY2021Q1	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	126000000	USD
CY2021Q1	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	145000000	USD
CY2021Q1	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	147000000	USD
CY2021Q1	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	84000000	USD
CY2021Q1	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	84000000	USD
CY2021Q1	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	931000000	USD
CY2021Q1	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	966000000	USD
CY2021Q1	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	466000000	USD
CY2021Q1	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate	465000000	USD
CY2021Q1	us-gaap	Held To Maturity Securities Debt Maturities Single Maturity Date Amortized Cost Basis HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	1197000000	USD
CY2021Q1	us-gaap	Held To Maturity Securities Debt Maturities Single Maturity Date Fair Value HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateFairValue	1235000000	USD
CY2021Q1	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	3110000000	USD
CY2021Q1	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	3166000000	USD
CY2021Q1	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	3043000000	USD
CY2021Q1	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	3114000000	USD
CY2020Q4	fnb	Financing Receivable Accrued Interest Receivable FinancingReceivableAccruedInterestReceivable	62900000	USD
CY2021Q1	fnb	Securities With Carrying Value Pledged To Secure Public Deposits Trust Deposits And For Other Purposes SecuritiesWithCarryingValuePledgedToSecurePublicDepositsTrustDepositsAndForOtherPurposes	5429000000	USD
CY2020Q4	fnb	Securities With Carrying Value Pledged To Secure Public Deposits Trust Deposits And For Other Purposes SecuritiesWithCarryingValuePledgedToSecurePublicDepositsTrustDepositsAndForOtherPurposes	5384000000	USD
CY2021Q1	us-gaap	Securities Held As Collateral At Fair Value SecuritiesHeldAsCollateralAtFairValue	434000000	USD
CY2020Q4	us-gaap	Securities Held As Collateral At Fair Value SecuritiesHeldAsCollateralAtFairValue	402000000	USD
CY2021Q1	fnb	Percentage Of Securities Held As Collateral At Fair Value PercentageOfSecuritiesHeldAsCollateralAtFairValue	0.944
CY2020Q4	fnb	Percentage Of Securities Held As Collateral At Fair Value PercentageOfSecuritiesHeldAsCollateralAtFairValue	0.914
CY2021Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	27	Security
CY2021Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	702000000	USD
CY2021Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	10000000	USD
CY2021Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	17	Security
CY2021Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	67000000	USD
CY2021Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	0	USD
CY2021Q1	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	44	Security
CY2021Q1	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	769000000	USD
CY2021Q1	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	10000000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	7	Security
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	168000000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	1000000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	17	Security
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	71000000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	0	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	24	Security
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	239000000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	1000000	USD
CY2021Q1	us-gaap	Municipal Debt Securities At Carrying Value MunicipalDebtSecuritiesAtCarryingValue	1100000000	USD
CY2021Q1	fnb	Municipal Bonds Percent With Formal Credit Enhancement Insurance MunicipalBondsPercentWithFormalCreditEnhancementInsurance	0.62
CY2021Q1	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	40000.00	USD
CY2020Q4	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	40000.00	USD
CY2021Q1	fnb	Financing Receivable Accrued Interest Receivable FinancingReceivableAccruedInterestReceivable	63500000	USD
CY2021Q1	fnb	Financing Receivable Purchasedwith Credit Deterioration Amountat Purchase Price Included With Allowance For Credit Losses Adjustment FinancingReceivablePurchasedwithCreditDeteriorationAmountatPurchasePriceIncludedWithAllowanceForCreditLossesAdjustment	50300000	USD
CY2021Q1	us-gaap	Financing Receivable Purchased With Credit Deterioration Discount Premium FinancingReceivablePurchasedWithCreditDeteriorationDiscountPremium	110000000.0	USD
CY2021Q1	fnb	Financing Receivable Discount Premium Remaining FinancingReceivableDiscountPremiumRemaining	44300000	USD
CY2020Q4	fnb	Financing Receivable Discount Premium Remaining FinancingReceivableDiscountPremiumRemaining	50900000	USD
CY2021Q1	us-gaap	Notes Receivable Gross NotesReceivableGross	25532000000	USD
CY2020Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	25459000000	USD
CY2021Q1	us-gaap	Number Of States In Which Entity Operates NumberOfStatesInWhichEntityOperates	7	State
CY2021Q1	us-gaap	Financing Receivable Originated In Current Fiscal Year FinancingReceivableOriginatedInCurrentFiscalYear	2011000000	USD
CY2021Q1	us-gaap	Financing Receivable Originated In Fiscal Year Before Latest Fiscal Year FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear	6812000000	USD
CY2021Q1	us-gaap	Financing Receivable Originated Two Years Before Latest Fiscal Year FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear	4171000000	USD
CY2021Q1	us-gaap	Financing Receivable Originated Three Years Before Latest Fiscal Year FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear	2642000000	USD
CY2021Q1	us-gaap	Financing Receivable Originated Four Years Before Latest Fiscal Year FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear	2103000000	USD
CY2021Q1	us-gaap	Financing Receivable Originated Five Or More Years Before Latest Fiscal Year FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear	5320000000	USD
CY2021Q1	us-gaap	Financing Receivable Revolving FinancingReceivableRevolving	2473000000	USD
CY2021Q1	us-gaap	Notes Receivable Gross NotesReceivableGross	25532000000	USD
CY2020Q4	us-gaap	Financing Receivable Originated In Current Fiscal Year FinancingReceivableOriginatedInCurrentFiscalYear	7565000000	USD
CY2020Q4	us-gaap	Financing Receivable Originated In Fiscal Year Before Latest Fiscal Year FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear	4429000000	USD
CY2020Q4	us-gaap	Financing Receivable Originated Two Years Before Latest Fiscal Year FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear	2837000000	USD
CY2020Q4	us-gaap	Financing Receivable Originated Three Years Before Latest Fiscal Year FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear	2281000000	USD
CY2020Q4	us-gaap	Financing Receivable Originated Four Years Before Latest Fiscal Year FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear	1800000000	USD
CY2020Q4	us-gaap	Financing Receivable Originated Five Or More Years Before Latest Fiscal Year FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear	3917000000	USD
CY2020Q4	us-gaap	Financing Receivable Revolving FinancingReceivableRevolving	2630000000	USD
CY2020Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	25459000000	USD
CY2021Q1	fnb	Financing Receivable Short Term Modification Due To Unusual Or Infrequent Event FinancingReceivableShortTermModificationDueToUnusualOrInfrequentEvent	269000000	USD
CY2021Q1	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	98000000	USD
CY2020Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	91000000	USD
CY2021Q1	fnb	Restructured Loans Receivable Returned To Performing Status RestructuredLoansReceivableReturnedToPerformingStatus	3900000	USD
CY2021Q1	fnb	Financing Receivable Pooled Allowance Restructured FinancingReceivablePooledAllowanceRestructured	3900000	USD
CY2020Q4	fnb	Financing Receivable Pooled Allowance Restructured FinancingReceivablePooledAllowanceRestructured	4100000	USD
CY2021Q1	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	34	Contract
CY2021Q1	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	19000000	USD
CY2021Q1	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	19000000	USD
CY2020Q1	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	60	Contract
CY2020Q1	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	5000000	USD
CY2020Q1	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	4000000	USD
CY2021Q1	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	2	Contract
CY2021Q1	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	0	USD
CY2020Q1	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	17	Contract
CY2020Q1	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	4000000	USD
CY2020Q1	us-gaap	Financing Receivable Allowance For Credit Losses Period Increase Decrease FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease	105000000	USD
CY2020Q4	fnb	Forecasted Macroeconomic Variables Percentage Of Growth Gross Domestic Product ForecastedMacroeconomicVariablesPercentageOfGrowthGrossDomesticProduct	0.04
CY2020Q4	fnb	Forecasted Macroeconomic Variables Percentage Of Unemployment ForecastedMacroeconomicVariablesPercentageOfUnemployment	0.06
CY2021Q1	fnb	Forecasted Macroeconomic Variables Percentage Of Contraction Gross Domestic Product In Current Year ForecastedMacroeconomicVariablesPercentageOfContractionGrossDomesticProductInCurrentYear	0.06
CY2021Q1	fnb	Forecasted Macroeconomic Variables Percentage Of Contraction Gross Domestic Product In Next Fiscal Year ForecastedMacroeconomicVariablesPercentageOfContractionGrossDomesticProductInNextFiscalYear	0.02
CY2021Q1	fnb	Forecasted Macroeconomic Variables Percentage Of Unemployment ForecastedMacroeconomicVariablesPercentageOfUnemployment	0.05
CY2020	us-gaap	Financing Receivable Allowance For Credit Losses Period Increase Decrease FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease	-1100000	USD
CY2020	fnb	Financing Receivable Allowancefor Credit Loss Period Increase Decrease Percentage FinancingReceivableAllowanceforCreditLossPeriodIncreaseDecreasePercentage	-0.003
CY2021Q1	fnb	Financing Receivable Allowancefor Credit Loss Ratio FinancingReceivableAllowanceforCreditLossRatio	0.0142
CY2020Q4	fnb	Financing Receivable Allowancefor Credit Loss Ratio FinancingReceivableAllowanceforCreditLossRatio	0.0143
CY2021Q1	fnb	Provision For Credit Losses ProvisionForCreditLosses	5900000	USD
CY2021Q1	fnb	Financing Receivable Allowance For Credit Loss Write Off Net FinancingReceivableAllowanceForCreditLossWriteOffNet	7100000	USD
CY2020Q1	fnb	Financing Receivable Allowance For Credit Loss Write Off Net FinancingReceivableAllowanceForCreditLossWriteOffNet	5700000	USD
CY2021Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	122500000	USD
CY2021Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	130400000	USD
CY2021Q1	fnb	Operating Lease Lease Notyet Commenced Expense OperatingLeaseLeaseNotyetCommencedExpense	21500000	USD
CY2021Q1	us-gaap	Operating Lease Cost OperatingLeaseCost	7000000	USD
CY2020Q1	us-gaap	Operating Lease Cost OperatingLeaseCost	7000000	USD
CY2021Q1	us-gaap	Variable Lease Cost VariableLeaseCost	1000000	USD
CY2020Q1	us-gaap	Variable Lease Cost VariableLeaseCost	1000000	USD
CY2021Q1	us-gaap	Lease Cost LeaseCost	8000000	USD
CY2020Q1	us-gaap	Lease Cost LeaseCost	8000000	USD
CY2021Q1	us-gaap	Operating Lease Payments OperatingLeasePayments	7000000	USD
CY2020Q1	us-gaap	Operating Lease Payments OperatingLeasePayments	6000000	USD
CY2021Q1	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	USD
CY2020Q1	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	4000000	USD
CY2021Q1	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P9Y4M20D
CY2020Q1	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P9Y7M20D
CY2021Q1	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.026
CY2020Q1	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.029
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	19000000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	22000000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	17000000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	16000000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	12000000	USD
CY2021Q1	fnb	Lessee Operating Lease Liability To Be Paid After Year Four LesseeOperatingLeaseLiabilityToBePaidAfterYearFour	64000000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	150000000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	20000000	USD
CY2021Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	130000000	USD
CY2021Q1	fnb	Proportional Amortization Method Qualified Affordable Housing Project Investments Other Assets ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsOtherAssets	71000000	USD
CY2020Q4	fnb	Proportional Amortization Method Qualified Affordable Housing Project Investments Other Assets ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsOtherAssets	71000000	USD
CY2021Q1	fnb	Equity Method Qualified Affordable Housing Project Investments Other Assets EquityMethodQualifiedAffordableHousingProjectInvestmentsOtherAssets	3000000	USD
CY2020Q4	fnb	Equity Method Qualified Affordable Housing Project Investments Other Assets EquityMethodQualifiedAffordableHousingProjectInvestmentsOtherAssets	3000000	USD
CY2021Q1	fnb	Qualified Affordable Housing Project Investments Other Assets QualifiedAffordableHousingProjectInvestmentsOtherAssets	74000000	USD
CY2020Q4	fnb	Qualified Affordable Housing Project Investments Other Assets QualifiedAffordableHousingProjectInvestmentsOtherAssets	74000000	USD
CY2021Q1	fnb	Qualified Affordable Housing Project Investments Unfunded Commitments QualifiedAffordableHousingProjectInvestmentsUnfundedCommitments	41000000	USD
CY2020Q4	fnb	Qualified Affordable Housing Project Investments Unfunded Commitments QualifiedAffordableHousingProjectInvestmentsUnfundedCommitments	45000000	USD
CY2021Q1	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	0	USD
CY2020Q1	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	0	USD
CY2021Q1	fnb	Proportional Amortization Method Qualified Affordable Housing Project Investments Amortization ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	3000000	USD
CY2020Q1	fnb	Proportional Amortization Method Qualified Affordable Housing Project Investments Amortization ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	3000000	USD
CY2021Q1	fnb	Amortization Method Qualified Affordable Housing Project Investments Low Income Housing Tax Credit AmortizationMethodQualifiedAffordableHousingProjectInvestmentsLowIncomeHousingTaxCredit	-3000000	USD
CY2020Q1	fnb	Amortization Method Qualified Affordable Housing Project Investments Low Income Housing Tax Credit AmortizationMethodQualifiedAffordableHousingProjectInvestmentsLowIncomeHousingTaxCredit	-3000000	USD
CY2021Q1	fnb	Amortization Method Qualified Affordable Housing Project Investments Other Tax Benefits Relatedto Tax Credit Investments AmortizationMethodQualifiedAffordableHousingProjectInvestmentsOtherTaxBenefitsRelatedtoTaxCreditInvestments	-1000000	USD
CY2020Q1	fnb	Amortization Method Qualified Affordable Housing Project Investments Other Tax Benefits Relatedto Tax Credit Investments AmortizationMethodQualifiedAffordableHousingProjectInvestmentsOtherTaxBenefitsRelatedtoTaxCreditInvestments	-1000000	USD
CY2021Q1	fnb	Amortization Method Qualified Affordable Housing Project Investments Provision For Income Tax AmortizationMethodQualifiedAffordableHousingProjectInvestmentsProvisionForIncomeTax	-1000000	USD
CY2020Q1	fnb	Amortization Method Qualified Affordable Housing Project Investments Provision For Income Tax AmortizationMethodQualifiedAffordableHousingProjectInvestmentsProvisionForIncomeTax	-1000000	USD
CY2021Q1	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	435000000	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	403000000	USD
CY2021Q1	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate	1130000000	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate	1280000000	USD
CY2021Q1	fnb	Subordinated Notes Short Term SubordinatedNotesShortTerm	122000000	USD
CY2020Q4	fnb	Subordinated Notes Short Term SubordinatedNotesShortTerm	121000000	USD
CY2021Q1	us-gaap	Short Term Borrowings ShortTermBorrowings	1687000000	USD
CY2020Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	1804000000	USD
CY2021Q1	fnb	Shortterm Advances ShorttermAdvances	1100000000	USD
CY2021Q1	fnb	Shortterm Advances Percentage Bearing Fixed Interest Rate ShorttermAdvancesPercentageBearingFixedInterestRate	1.000
CY2020Q4	fnb	Shortterm Advances ShorttermAdvances	1300000000	USD
CY2020Q4	fnb	Shortterm Advances Percentage Bearing Fixed Interest Rate ShorttermAdvancesPercentageBearingFixedInterestRate	1.000
CY2021Q1	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	400000000	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	400000000	USD
CY2021Q1	us-gaap	Senior Notes SeniorNotes	299000000	USD
CY2020Q4	us-gaap	Senior Notes SeniorNotes	299000000	USD
CY2021Q1	us-gaap	Subordinated Long Term Debt SubordinatedLongTermDebt	78000000	USD
CY2020Q4	us-gaap	Subordinated Long Term Debt SubordinatedLongTermDebt	81000000	USD
CY2021Q1	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	66000000	USD
CY2020Q4	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	66000000	USD
CY2021Q1	us-gaap	Other Long Term Debt OtherLongTermDebt	248000000	USD
CY2020Q4	us-gaap	Other Long Term Debt OtherLongTermDebt	249000000	USD
CY2021Q1	us-gaap	Long Term Debt LongTermDebt	1091000000	USD
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	1095000000	USD
CY2021Q1	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	558000000	USD
CY2021Q1	us-gaap	Proceeds From Debt Net Of Issuance Costs ProceedsFromDebtNetOfIssuanceCosts	560000000	USD
CY2021Q1	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	547000000	USD
CY2021Q1	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	66000000	USD
CY2021Q1	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	6000000	USD
CY2021Q1	us-gaap	Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral	25000000	USD
CY2020Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	3000000	USD
CY2020Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral	37000000	USD
CY2021Q1	us-gaap	Derivative Asset Not Subject To Master Netting Arrangement DerivativeAssetNotSubjectToMasterNettingArrangement	230000000	USD
CY2021Q1	us-gaap	Derivative Liability Not Subject To Master Netting Arrangement DerivativeLiabilityNotSubjectToMasterNettingArrangement	34000000	USD
CY2020Q4	us-gaap	Derivative Asset Not Subject To Master Netting Arrangement DerivativeAssetNotSubjectToMasterNettingArrangement	373000000	USD
CY2020Q4	us-gaap	Derivative Liability Not Subject To Master Netting Arrangement DerivativeLiabilityNotSubjectToMasterNettingArrangement	3000000	USD
CY2021Q1	us-gaap	Derivative Notional Amount DerivativeNotionalAmount	12619000000	USD
CY2021Q1	us-gaap	Derivative Assets DerivativeAssets	236000000	USD
CY2021Q1	us-gaap	Derivative Liabilities DerivativeLiabilities	59000000	USD
CY2020Q4	us-gaap	Derivative Notional Amount DerivativeNotionalAmount	12480000000	USD
CY2020Q4	us-gaap	Derivative Assets DerivativeAssets	376000000	USD
CY2020Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	40000000	USD
CY2021Q1	us-gaap	Interest And Fee Income Loans And Leases Held In Portfolio InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio	221000000	USD
CY2021Q1	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	7000000	USD
CY2020Q1	us-gaap	Interest And Fee Income Loans And Leases Held In Portfolio InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio	266000000	USD
CY2020Q1	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	14000000	USD
CY2021Q1	us-gaap	Additional Collateral Aggregate Fair Value AdditionalCollateralAggregateFairValue	100000	USD
CY2020Q4	us-gaap	Additional Collateral Aggregate Fair Value AdditionalCollateralAggregateFairValue	300000	USD
CY2021Q1	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	6000000	USD
CY2021Q1	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	0	USD
CY2021Q1	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	6000000	USD
CY2021Q1	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	0	USD
CY2021Q1	us-gaap	Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral	25000000	USD
CY2021Q1	us-gaap	Derivative Collateral Right To Reclaim Securities DerivativeCollateralRightToReclaimSecurities	0	USD
CY2021Q1	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	25000000	USD
CY2021Q1	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	0	USD
CY2020Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	3000000	USD
CY2020Q4	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	0	USD
CY2020Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	3000000	USD
CY2020Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	0	USD
CY2020Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral	37000000	USD
CY2020Q4	us-gaap	Derivative Collateral Right To Reclaim Securities DerivativeCollateralRightToReclaimSecurities	0	USD
CY2020Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	37000000	USD
CY2020Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	0	USD
CY2021Q1	fnb	Percentage Of Commitments To Extend Credit Dependent On Financial Condition PercentageOfCommitmentsToExtendCreditDependentOnFinancialCondition	0.746
CY2021Q1	fnb	Allowance For Credit Losses On Loan Commitments AllowanceForCreditLossesOnLoanCommitments	13500000	USD
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	5362034	shares
CY2020Q3	fnb	Share Based Compensation Arrangement By Share Based Payment Award Number Of Additional Shares Registered ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesRegistered	4640000	shares
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	5082796	shares
CY2021Q1	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	10000000	USD
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	64000000	USD
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Outstanding Weighted Average Remaining Contractual Terms ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms	P1Y5M26D
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	182747	shares
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	8.86
CY2020Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	231646	shares
CY2020Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	8.22
CY2021Q1	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	700000	USD
CY2021Q1	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	21000000	USD
CY2020Q1	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	7000000	USD
CY2021Q1	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2000000	USD
CY2020Q1	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2000000	USD
CY2021Q1	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	23000000	USD
CY2020Q1	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	9000000	USD
CY2021Q1	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-1000000	USD
CY2020Q1	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	2000000	USD
CY2021Q1	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0	USD
CY2020Q1	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0	USD
CY2021Q1	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1000000	USD
CY2020Q1	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2000000	USD
CY2021Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	22000000	USD
CY2020Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11000000	USD
CY2021Q1	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020Q1	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2021Q1	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.189
CY2020Q1	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.188
CY2021Q1	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	56100000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	51000000.0	USD
CY2021Q1	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	-16000000	USD
CY2021Q1	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	-4000000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-12000000	USD
CY2021Q1	us-gaap	Net Income Loss NetIncomeLoss	93000000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	47000000	USD
CY2021Q1	us-gaap	Dividends Preferred Stock DividendsPreferredStock	2000000	USD
CY2020Q1	us-gaap	Dividends Preferred Stock DividendsPreferredStock	2000000	USD
CY2021Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	91000000	USD
CY2020Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	45000000	USD
CY2021Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	320975209	shares
CY2020Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	324247710	shares
CY2021Q1	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	3769650	shares
CY2020Q1	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	1797472	shares
CY2021Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	324744859	shares
CY2020Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	326045182	shares
CY2021Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.28
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.14
CY2021Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.28
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.14
CY2021Q1	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2020Q1	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	450	shares
CY2021Q1	us-gaap	Interest Paid InterestPaid	32000000	USD
CY2020Q1	us-gaap	Interest Paid InterestPaid	75000000	USD
CY2021Q1	us-gaap	Income Taxes Paid IncomeTaxesPaid	5000000	USD
CY2020Q1	us-gaap	Income Taxes Paid IncomeTaxesPaid	0	USD
CY2021Q1	us-gaap	Transfer Of Other Real Estate TransferOfOtherRealEstate	0	USD
CY2020Q1	us-gaap	Transfer Of Other Real Estate TransferOfOtherRealEstate	1000000	USD
CY2021Q1	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	Segment
CY2021Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	251000000	USD
CY2021Q1	us-gaap	Interest Expense InterestExpense	28000000	USD
CY2021Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	223000000	USD
CY2021Q1	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	6000000	USD
CY2021Q1	us-gaap	Noninterest Income NoninterestIncome	83000000	USD
CY2021Q1	fnb	Non Interest Expense Excluding Amortization Of Intangibles NonInterestExpenseExcludingAmortizationOfIntangibles	182000000	USD
CY2021Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	3000000	USD
CY2021Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	22000000	USD
CY2021Q1	us-gaap	Net Income Loss NetIncomeLoss	93000000	USD
CY2021Q1	us-gaap	Assets Assets	38475000000	USD
CY2021Q1	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	2313000000	USD
CY2020Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	306000000	USD
CY2020Q1	us-gaap	Interest Expense InterestExpense	74000000	USD
CY2020Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	232000000	USD
CY2020Q1	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	48000000	USD
CY2020Q1	us-gaap	Noninterest Income NoninterestIncome	69000000	USD
CY2020Q1	fnb	Non Interest Expense Excluding Amortization Of Intangibles NonInterestExpenseExcludingAmortizationOfIntangibles	192000000	USD
CY2020Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	3000000	USD
CY2020Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11000000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	47000000	USD
CY2020Q1	us-gaap	Assets Assets	35049000000	USD
CY2020Q1	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	2326000000	USD
CY2020Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3	0	USD
CY2021Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3	0	USD
CY2021Q1	fnb	Collateral Dependent Loans Allowance For Credit Loss CollateralDependentLoansAllowanceForCreditLoss	18000000.0	USD
CY2021Q1	fnb	Provision For Loan And Lease Losses Fair Value Disclosure ProvisionForLoanAndLeaseLossesFairValueDisclosure	6800000	USD
CY2021Q1	fnb	Other Real Estate Fair Value Disclosure OtherRealEstateFairValueDisclosure	500000	USD
CY2021Q1	fnb	Other Real Estate Owned Written Down Value OtherRealEstateOwnedWrittenDownValue	400000	USD
CY2021Q1	fnb	Gains Losses Included In Earnings On Non Recurring Assets Write Down GainsLossesIncludedInEarningsOnNonRecurringAssetsWriteDown	-100000	USD

Files In Submission

Name	View Source	Status
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FNB CORP/PA/ Stock $fnb

2021 Q1 Form 10-Q Financial Statement

#000003780821000015 Filed on May 06, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$FNB FNB CORP/PA/ Stock $fnb

2021 Q1 Form 10-Q Financial Statement

#000003780821000015 Filed on May 06, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$FNB
FNB CORP/PA/ Stock $fnb