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Other Comprehensive Income (Other Comprehensive Income) (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Net Unrealized Gains Losses on Non Otti Securities [Abstract]      
Net unrealized gains (losses) on non-OTTI securities, pretax, Beginning Balance $ 647,000,000pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleNonOttiSecuritiesAdjustmentBeforeTax $ 1,858,000,000pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleNonOttiSecuritiesAdjustmentBeforeTax $ 1,098,000,000pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleNonOttiSecuritiesAdjustmentBeforeTax
Net unrealized gains (losses) on non-OTTI securities, tax, Beginning Balance (238,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleNonOttiSecuritiesAdjustmentTax (681,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleNonOttiSecuritiesAdjustmentTax (402,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleNonOttiSecuritiesAdjustmentTax
Net unrealized gains (losses) on non-OTTI securities, after-tax, Beginning Balance 409,000,000pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleNonOttiSecuritiesAdjustmentNetOfTax 1,177,000,000pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleNonOttiSecuritiesAdjustmentNetOfTax 696,000,000pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleNonOttiSecuritiesAdjustmentNetOfTax
Increase in net unrealized gains (losses) on non-OTTI securities, Pretax 410,000,000pnc_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnNonOttiSecuritiesArisingDuringPeriodBeforeTax (1,122,000,000)pnc_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnNonOttiSecuritiesArisingDuringPeriodBeforeTax 931,000,000pnc_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnNonOttiSecuritiesArisingDuringPeriodBeforeTax
Increase in net unrealized gains (losses) on non-OTTI securities, Tax (150,000,000)pnc_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnNonOttiSecuritiesArisingDuringPeriodTax 411,000,000pnc_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnNonOttiSecuritiesArisingDuringPeriodTax (341,000,000)pnc_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnNonOttiSecuritiesArisingDuringPeriodTax
Increase in net unrealized gains (losses) on non-OTTI securities, After tax 260,000,000pnc_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnNonOttiSecuritiesArisingDuringPeriodAfterTax (711,000,000)pnc_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnNonOttiSecuritiesArisingDuringPeriodAfterTax 590,000,000pnc_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnNonOttiSecuritiesArisingDuringPeriodAfterTax
Less: Net gains (losses) realized as a yield adjustment reclassified to investment securities in interest income, before tax 31,000,000pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForYieldAdjustmentOnNonOttiSecuritiesBeforeTax 39,000,000pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForYieldAdjustmentOnNonOttiSecuritiesBeforeTax 37,000,000pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForYieldAdjustmentOnNonOttiSecuritiesBeforeTax
Less: Net gains (losses) realized as a yield adjustment reclassified to investment securities in interest income, tax (11,000,000)pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForYieldAdjustmentOnNonOttiSecuritiesTax (14,000,000)pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForYieldAdjustmentOnNonOttiSecuritiesTax (13,000,000)pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForYieldAdjustmentOnNonOttiSecuritiesTax
Less: Net gains (losses) realized as a yield adjustment reclassified to investment securities in interest income, after tax 20,000,000pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForYieldAdjustmentOnNonOttiSecuritiesAfterTax 25,000,000pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForYieldAdjustmentOnNonOttiSecuritiesAfterTax 24,000,000pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForYieldAdjustmentOnNonOttiSecuritiesAfterTax
Less: Net gains (losses) realized on sales of non-OTTI securities reclassified to noninterest income, before tax 4,000,000pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForSaleOfNonOttiSecuritiesBeforeTax 50,000,000pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForSaleOfNonOttiSecuritiesBeforeTax 134,000,000pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForSaleOfNonOttiSecuritiesBeforeTax
Less: Net gains (losses) realized on sales of non-OTTI securities reclassified to noninterest income, tax (2,000,000)pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForSaleOfNonOttiSecuritiesTax (18,000,000)pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForSaleOfNonOttiSecuritiesTax (49,000,000)pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForSaleOfNonOttiSecuritiesTax
Less: Net gains (losses) realized on sales of non-OTTI securities reclassified to noninterest income, after tax 2,000,000pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForSaleOfNonOttiSecuritiesAfterTax 32,000,000pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForSaleOfNonOttiSecuritiesAfterTax 85,000,000pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForSaleOfNonOttiSecuritiesAfterTax
Net unrealized gains (losses) on non-OTTI securities 375,000,000pnc_OtherComprehensiveIncomeLossNonOttiSecuritiesAdjustmentBeforeTax (1,211,000,000)pnc_OtherComprehensiveIncomeLossNonOttiSecuritiesAdjustmentBeforeTax 760,000,000pnc_OtherComprehensiveIncomeLossNonOttiSecuritiesAdjustmentBeforeTax
Net unrealized gains (losses) on non-OTTI securities, Activity, Tax (137,000,000)pnc_OtherComprehensiveIncomeLossNonOttiSecuritiesAdjustmentTax 443,000,000pnc_OtherComprehensiveIncomeLossNonOttiSecuritiesAdjustmentTax (279,000,000)pnc_OtherComprehensiveIncomeLossNonOttiSecuritiesAdjustmentTax
Net unrealized gains (losses) on non-OTTI securities, Activity, After Tax 238,000,000pnc_OtherComprehensiveIncomeLossNonOttiSecuritiesAdjustmentAfterTax (768,000,000)pnc_OtherComprehensiveIncomeLossNonOttiSecuritiesAdjustmentAfterTax 481,000,000pnc_OtherComprehensiveIncomeLossNonOttiSecuritiesAdjustmentAfterTax
Net unrealized gains (losses) on non-OTTI securities, pretax, Ending Balance 1,022,000,000pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleNonOttiSecuritiesAdjustmentBeforeTax 647,000,000pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleNonOttiSecuritiesAdjustmentBeforeTax 1,858,000,000pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleNonOttiSecuritiesAdjustmentBeforeTax
Net unrealized gains (losses) on non-OTTI securities, tax, Ending Balance (375,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleNonOttiSecuritiesAdjustmentTax (238,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleNonOttiSecuritiesAdjustmentTax (681,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleNonOttiSecuritiesAdjustmentTax
Net unrealized gains (losses) on non-OTTI securities, after-tax, Ending Balance 647,000,000pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleNonOttiSecuritiesAdjustmentNetOfTax 409,000,000pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleNonOttiSecuritiesAdjustmentNetOfTax 1,177,000,000pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleNonOttiSecuritiesAdjustmentNetOfTax
Net Unrealized Gains Losses on Otti Securities [Abstract]      
Net unrealized gains (losses) on OTTI securities, before tax, Beginning Balance 36,000,000pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleOttiSecuritiesAdjustmentBeforeTax (195,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleOttiSecuritiesAdjustmentBeforeTax (1,166,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleOttiSecuritiesAdjustmentBeforeTax
Net unrealized gains (losses) on OTTI securities, tax, Beginning Balance (12,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleOttiSecuritiesAdjustmentTax 72,000,000pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleOttiSecuritiesAdjustmentTax 428,000,000pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleOttiSecuritiesAdjustmentTax
Net unrealized gains (losses) on OTTI securities, after tax, Beginning Balance 24,000,000pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleOttiSecuritiesAdjustmentNetOfTax (123,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleOttiSecuritiesAdjustmentNetOfTax (738,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleOttiSecuritiesAdjustmentNetOfTax
Increase in net unrealized gains (losses) on OTTI securities, Pretax 68,000,000pnc_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnOttiSecuritiesArisingDuringPeriodBeforeTax 215,000,000pnc_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnOttiSecuritiesArisingDuringPeriodBeforeTax 854,000,000pnc_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnOttiSecuritiesArisingDuringPeriodBeforeTax
Increase in net unrealized gains (losses) on OTTI securities, Tax (25,000,000)pnc_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnOttiSecuritiesArisingDuringPeriodTax (78,000,000)pnc_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnOttiSecuritiesArisingDuringPeriodTax (313,000,000)pnc_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnOttiSecuritiesArisingDuringPeriodTax
Increase in net unrealized gains (losses) on OTTI securities, After tax 43,000,000pnc_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnOttiSecuritiesArisingDuringPeriodAfterTax 137,000,000pnc_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnOttiSecuritiesArisingDuringPeriodAfterTax 541,000,000pnc_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnOttiSecuritiesArisingDuringPeriodAfterTax
Less: Net gains (losses) realized on sales of OTTI securities reclassified to noninterest income, before tax     (6,000,000)pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForSaleOfOttiSecuritiesBeforeTax
Less: Net gains (losses) realized on sales of OTTI securities reclassified to noninterest income, tax     2,000,000pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForSaleOfOttiSecuritiesTax
Less: Net gains (losses) realized on sales of OTTI securities reclassified to noninterest income, after tax     (4,000,000)pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForSaleOfOttiSecuritiesAfterTax
Net other-than-temporary impairments (11,000,000)us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet (16,000,000)us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet (111,000,000)us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet
Less: Net OTTI losses realized in net income, Tax 4,000,000pnc_NetOtherThanTemporaryImpairmentsTax 6,000,000pnc_NetOtherThanTemporaryImpairmentsTax 41,000,000pnc_NetOtherThanTemporaryImpairmentsTax
Less: Other OTTI losses realized in net income, After-tax (7,000,000)pnc_NetOtherThanTemporaryImpairmentsAfterTax (10,000,000)pnc_NetOtherThanTemporaryImpairmentsAfterTax (70,000,000)pnc_NetOtherThanTemporaryImpairmentsAfterTax
Net unrealized gains (losses) on OTTI securities, Activity, Before Tax 79,000,000pnc_OtherComprehensiveIncomeLossOttiSecuritiesAdjustmentBeforeTax 231,000,000pnc_OtherComprehensiveIncomeLossOttiSecuritiesAdjustmentBeforeTax 971,000,000pnc_OtherComprehensiveIncomeLossOttiSecuritiesAdjustmentBeforeTax
Net unrealized gains (losses) on OTTI securities, Activity, Tax (29,000,000)pnc_OtherComprehensiveIncomeLossOttiSecuritiesAdjustmentTax (84,000,000)pnc_OtherComprehensiveIncomeLossOttiSecuritiesAdjustmentTax (356,000,000)pnc_OtherComprehensiveIncomeLossOttiSecuritiesAdjustmentTax
Net unrealized gains (losses) on OTTI securities, Activity, After Tax 50,000,000pnc_OtherComprehensiveIncomeLossOttiSecuritiesAdjustmentAfterTax 147,000,000pnc_OtherComprehensiveIncomeLossOttiSecuritiesAdjustmentAfterTax 615,000,000pnc_OtherComprehensiveIncomeLossOttiSecuritiesAdjustmentAfterTax
Net unrealized gains (losses) on OTTI securities, before tax, Ending Balance 115,000,000pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleOttiSecuritiesAdjustmentBeforeTax 36,000,000pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleOttiSecuritiesAdjustmentBeforeTax (195,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleOttiSecuritiesAdjustmentBeforeTax
Net unrealized gains (losses) on OTTI securities, tax, Ending Balance (41,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleOttiSecuritiesAdjustmentTax (12,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleOttiSecuritiesAdjustmentTax 72,000,000pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleOttiSecuritiesAdjustmentTax
Net unrealized gains (losses) on OTTI securities, after tax, Ending Balance 74,000,000pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleOttiSecuritiesAdjustmentNetOfTax 24,000,000pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleOttiSecuritiesAdjustmentNetOfTax (123,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleOttiSecuritiesAdjustmentNetOfTax
Net unrealized gains (losses) on cash flow hedge derivatives [Abstract]      
Net unrealized gains (losses) on cash flow hedge derivatives, before tax, Beginning Balance 384,000,000pnc_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectBeforeTax1 911,000,000pnc_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectBeforeTax1 1,131,000,000pnc_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectBeforeTax1
Net unrealized gains (losses) on cash flow hedge derivatives, tax, Beginning balance (141,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesTax (333,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesTax (414,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesTax
Net unrealized gains (losses) on cash flow hedge derivatives, after-tax, Beginning balance 243,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax 578,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax 717,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax
Increase in net unrealized gains (losses) on cash flow hedge derivatives, Pretax 431,000,000us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax (141,000,000)us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax 312,000,000us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax
Increase in net unrealized gains (losses) on cash flow hedge derivatives, Tax (158,000,000)us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax 52,000,000us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax (114,000,000)us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax
Increase in net unrealized gains (losses) on cash flow hedge derivatives, After tax 273,000,000us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax (89,000,000)us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax 198,000,000us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax
Less: Net gains (losses) realized as a yield adjustment reclassified to loan interest income, Before Tax 251,000,000pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeYieldAdjustmentToLoanInterestIncomeBeforeTax 284,000,000pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeYieldAdjustmentToLoanInterestIncomeBeforeTax 388,000,000pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeYieldAdjustmentToLoanInterestIncomeBeforeTax
Less: Net gains (losses) realized as a yield adjustment reclassified to loan interest income, Tax (92,000,000)pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeYieldAdjustmentToLoanInterestIncomeTax (103,000,000)pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeYieldAdjustmentToLoanInterestIncomeTax (142,000,000)pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeYieldAdjustmentToLoanInterestIncomeTax
Less: Net gains (losses) realized as a yield adjustment reclassified to loan interest income, After Tax 159,000,000pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeYieldAdjustmentToLoanInterestIncomeAfterTax 181,000,000pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeYieldAdjustmentToLoanInterestIncomeAfterTax 246,000,000pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeYieldAdjustmentToLoanInterestIncomeAfterTax
Less: Net gains (losses) realized as a yield adjustment reclassified to investment securities interest income, Before Tax 12,000,000pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeYieldAdjustmentToInvestmentSecuritiesInterestIncomeBeforeTax 53,000,000pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeYieldAdjustmentToInvestmentSecuritiesInterestIncomeBeforeTax 68,000,000pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeYieldAdjustmentToInvestmentSecuritiesInterestIncomeBeforeTax
Less: Net gains (losses) realized as a yield adjustment reclassified to investment securities interest income, Tax (5,000,000)pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeYieldAdjustmentToInvestmentSecuritiesInterestIncomeTax (19,000,000)pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeYieldAdjustmentToInvestmentSecuritiesInterestIncomeTax (25,000,000)pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeYieldAdjustmentToInvestmentSecuritiesInterestIncomeTax
Less: Net gains (losses) realized as a yield adjustment reclassified to investment securities interest income, After Tax 7,000,000pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeYieldAdjustmentToInvestmentSecuritiesInterestIncomeAfterTax 34,000,000pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeYieldAdjustmentToInvestmentSecuritiesInterestIncomeAfterTax 43,000,000pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeYieldAdjustmentToInvestmentSecuritiesInterestIncomeAfterTax
Less: Net gains (losses) realized on sales of securities reclassified to noninterest income, Before Tax   49,000,000pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeSalesOfSecuritiesToNoninterestIncomeBeforeTax 76,000,000pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeSalesOfSecuritiesToNoninterestIncomeBeforeTax
Less: Net gains (losses) realized on sales of securities reclassified to noninterest income, Tax   (18,000,000)pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeSalesOfSecuritiesToNoninterestIncomeTax (28,000,000)pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeSalesOfSecuritiesToNoninterestIncomeTax
Less: Net gains (losses) realized on sales of securities reclassified to noninterest income, After Tax   31,000,000pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeSalesOfSecuritiesToNoninterestIncomeAfterTax 48,000,000pnc_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeSalesOfSecuritiesToNoninterestIncomeAfterTax
Net unrealized gains (losses) on cash flow hedge derivatives, Before Tax 168,000,000us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax (527,000,000)us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax (220,000,000)us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax
Net unrealized gains (losses) on cash flow hedge derivatives, tax (61,000,000)us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax 192,000,000us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax 81,000,000us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax
Net unrealized gains (losses) on cash flow hedge derivatives, Net of tax, Total 107,000,000us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax (335,000,000)us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax (139,000,000)us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax
Net unrealized gains (losses) on cash flow hedge derivatives, before tax, Ending Balance 552,000,000pnc_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectBeforeTax1 384,000,000pnc_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectBeforeTax1 911,000,000pnc_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectBeforeTax1
Net unrealized gains (losses) on cash flow hedge derivatives Ending balance, tax (202,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesTax (141,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesTax (333,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesTax
Net unrealized gains (losses) on cash flow hedge derivatives, after-tax, Ending balance 350,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax 243,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax 578,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax
Pension and other postretirement benefit plan adjustments [Abstract]      
Pension and other postretirement benefit plan adjustments, before tax, Beginning Balance (374,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeTax (1,226,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeTax (1,191,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeTax
Pension and other postretirement benefit plan adjustments, tax, Beginning Balance 137,000,000pnc_AccumulatedOtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax 449,000,000pnc_AccumulatedOtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax 436,000,000pnc_AccumulatedOtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax
Pension and other postretirement benefit plan adjustments, after tax, Beginning Balance (237,000,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax (777,000,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax (755,000,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax
Net pension and other postretirement benefit plan activity, Before tax (440,000,000)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax 760,000,000us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax (118,000,000)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax
Net pension and other postretirement benefit plan activity, Tax 161,000,000us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeReclassificationAdjustmentsTax (279,000,000)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeReclassificationAdjustmentsTax 44,000,000us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeReclassificationAdjustmentsTax
Net pension and other postretirement benefit plan activity, After tax (279,000,000)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax 481,000,000us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax (74,000,000)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax
Amortization of actuarial loss (gain) reclassified to other noninterest expense, Before tax 4,000,000us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax 103,000,000us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax 94,000,000us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax
Amortization of actuarial loss (gain) reclassified to other noninterest expense, Tax (1,000,000)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax (37,000,000)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax (35,000,000)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax
Amortization of actuarial loss (gain) reclassified to other noninterest expense, After tax 3,000,000us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax 66,000,000us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax 59,000,000us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax
Amortization of prior service cost (credit) reclassified to other noninterest expense, Before tax (10,000,000)us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax (11,000,000)us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax (11,000,000)us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax
Amortization of prior service cost (credit) reclassified to other noninterest expense, Tax 3,000,000us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax 4,000,000us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax 4,000,000us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax
Amortization of prior service cost (credit) reclassified to other noninterest expense, After tax (7,000,000)us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax (7,000,000)us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax (7,000,000)us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax
Pension and other postretirement benefit plan adjustments, net activity, Before tax (446,000,000)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax 852,000,000us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax (35,000,000)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax
Pension and other postretirement benefit plan adjustments, net activity, Tax 163,000,000us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax (312,000,000)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax 13,000,000us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax
Pension and other postretirement benefit plan adjustments, net activity, After Tax (283,000,000)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax 540,000,000us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax (22,000,000)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
Pension and other postretirement benefit plan adjustments, before tax, Ending Balance (820,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeTax (374,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeTax (1,226,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeTax
Pension and other postretirement benefit plan adjustments Ending balance, tax 300,000,000pnc_AccumulatedOtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax 137,000,000pnc_AccumulatedOtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax 449,000,000pnc_AccumulatedOtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax
Pension and other postretirement benefit plan adjustments, after tax, Ending Balance (520,000,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax (237,000,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax (777,000,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax
Other Comprehensive Income Other Adjustments [Abstract]      
Other, pretax, Beginning Balance (20,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossOtherNetBeforeTaxEndBal (41,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossOtherNetBeforeTaxEndBal (51,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossOtherNetBeforeTaxEndBal
Other, tax, Beginning Balance 17,000,000pnc_AccumulatedOtherComprehensiveIncomeLossOtherNetTaxEndBal 20,000,000pnc_AccumulatedOtherComprehensiveIncomeLossOtherNetTaxEndBal 26,000,000pnc_AccumulatedOtherComprehensiveIncomeLossOtherNetTaxEndBal
Other, after tax, Beginning balance (3,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossOtherNetNetOfTaxEndBal (21,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossOtherNetNetOfTaxEndBal (25,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossOtherNetNetOfTaxEndBal
PNC's portion of BlackRock's OCI, Before tax (36,000,000)pnc_OtherComprehensiveIncomeLossAdjustmentBlackrockGainsLossesBeforeTax 15,000,000pnc_OtherComprehensiveIncomeLossAdjustmentBlackrockGainsLossesBeforeTax 3,000,000pnc_OtherComprehensiveIncomeLossAdjustmentBlackrockGainsLossesBeforeTax
PNC's portion of BlackRock's OCI, Tax 14,000,000pnc_OtherComprehensiveIncomeLossAdjustmentBlackrockGainsLossesTax (12,000,000)pnc_OtherComprehensiveIncomeLossAdjustmentBlackrockGainsLossesTax (4,000,000)pnc_OtherComprehensiveIncomeLossAdjustmentBlackrockGainsLossesTax
PNC's portion of BlackRock's OCI, After tax (22,000,000)pnc_OtherComprehensiveIncomeLossAdjustmentBlackrockGainsLossesAfterTax 3,000,000pnc_OtherComprehensiveIncomeLossAdjustmentBlackrockGainsLossesAfterTax (1,000,000)pnc_OtherComprehensiveIncomeLossAdjustmentBlackrockGainsLossesAfterTax
Net investment hedge derivatives, Before tax 54,000,000pnc_OtherComprehensiveIncomeLossAdjustmentNetInvestmentHedgeDerivativesBeforeTax (21,000,000)pnc_OtherComprehensiveIncomeLossAdjustmentNetInvestmentHedgeDerivativesBeforeTax (27,000,000)pnc_OtherComprehensiveIncomeLossAdjustmentNetInvestmentHedgeDerivativesBeforeTax
Net investment hedge derivatives, Tax (20,000,000)pnc_OtherComprehensiveIncomeLossAdjustmentNetInvestmentHedgeDerivativesTax 8,000,000pnc_OtherComprehensiveIncomeLossAdjustmentNetInvestmentHedgeDerivativesTax 10,000,000pnc_OtherComprehensiveIncomeLossAdjustmentNetInvestmentHedgeDerivativesTax
Net investment hedge derivatives, After tax 34,000,000pnc_OtherComprehensiveIncomeLossAdjustmentNetInvestmentHedgeDerivativesAfterTax (13,000,000)pnc_OtherComprehensiveIncomeLossAdjustmentNetInvestmentHedgeDerivativesAfterTax (17,000,000)pnc_OtherComprehensiveIncomeLossAdjustmentNetInvestmentHedgeDerivativesAfterTax
Foreign Currency Transaction and Translation Adjustment, before Tax (57,000,000)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax 27,000,000us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax 34,000,000us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax
Foreign Currency Translation Adjustment, Tax 0us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax 1,000,000us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax (12,000,000)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax
Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total (57,000,000)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax 28,000,000us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax 22,000,000us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Total Other, net activity, Before tax (39,000,000)pnc_OtherComprehensiveIncomeOtherAdjustmentsPretaxPeriodIncreaseDecrease 21,000,000pnc_OtherComprehensiveIncomeOtherAdjustmentsPretaxPeriodIncreaseDecrease 10,000,000pnc_OtherComprehensiveIncomeOtherAdjustmentsPretaxPeriodIncreaseDecrease
Total Other, net activity, Tax (6,000,000)pnc_OtherComprehensiveIncomeOtherAdjustmentsTax (3,000,000)pnc_OtherComprehensiveIncomeOtherAdjustmentsTax (6,000,000)pnc_OtherComprehensiveIncomeOtherAdjustmentsTax
Total Other, net activity, After tax (45,000,000)pnc_OtherComprehensiveIncomeOtherAdjustmentsAfterTaxPeriodIncreaseDecrease 18,000,000pnc_OtherComprehensiveIncomeOtherAdjustmentsAfterTaxPeriodIncreaseDecrease 4,000,000pnc_OtherComprehensiveIncomeOtherAdjustmentsAfterTaxPeriodIncreaseDecrease
Other, pretax, Ending Balance (59,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossOtherNetBeforeTaxEndBal (20,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossOtherNetBeforeTaxEndBal (41,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossOtherNetBeforeTaxEndBal
Other, tax, Ending Balance 11,000,000pnc_AccumulatedOtherComprehensiveIncomeLossOtherNetTaxEndBal 17,000,000pnc_AccumulatedOtherComprehensiveIncomeLossOtherNetTaxEndBal 20,000,000pnc_AccumulatedOtherComprehensiveIncomeLossOtherNetTaxEndBal
Other, after tax, Ending balance $ (48,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossOtherNetNetOfTaxEndBal $ (3,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossOtherNetNetOfTaxEndBal $ (21,000,000)pnc_AccumulatedOtherComprehensiveIncomeLossOtherNetNetOfTaxEndBal