Label	Element	Value
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Accumulated Other Comprehensive Income (Loss), Cash Flow Hedge, After Reclassification And Tax	pnc_AccumulatedOtherComprehensiveIncomeLossCashFlowHedgeAfterReclassificationAndTax	$ 276,000,000
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax	us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	408,000,000
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax	us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax	799,000,000
AOCI Attributable to Parent [Member] \| Continuing Operations [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax	us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax	914,000,000
AOCI Attributable to Parent [Member] \| Discontinued Operations [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax	us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax	$ (115,000,000)
Common Stock [Member]
Common Stock, Shares, Outstanding	us-gaap_CommonStockSharesOutstanding	457,000,000
Common Stock, Shares, Outstanding	us-gaap_CommonStockSharesOutstanding	433,000,000
AOCI Attributable to Parent, Other [Member]
Accumulated Other Comprehensive Income Loss Other Net Of Tax End Balance	pnc_AccumulatedOtherComprehensiveIncomeLossOtherNetOfTaxEndBalance	$ (21,000,000)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Without Allowance For Credit Loss, Parent [Member]
Accumulated Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax	pnc_AccumulatedOtherComprehensiveIncomeLossSecuritiesAvailableforsaleAdjustmentafterTax	1,067,000,000
Cumulative Effect, Period Of Adoption, Adjusted Balance [Member]
Financing Receivable, Allowance for Credit Loss	us-gaap_FinancingReceivableAllowanceForCreditLosses	3,205,000,000
Cumulative Effect, Period Of Adoption, Adjusted Balance [Member] \| Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss	us-gaap_FinancingReceivableAllowanceForCreditLosses	1,697,000,000
Cumulative Effect, Period Of Adoption, Adjusted Balance [Member] \| Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss	us-gaap_FinancingReceivableAllowanceForCreditLosses	1,508,000,000
Accounting Standards Update 2016-13 [Member] \| Cumulative Effect, Period Of Adoption, Adjustment [Member] \| Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss	us-gaap_FinancingReceivableAllowanceForCreditLosses	767,000,000
Accounting Standards Update 2016-13 [Member] \| Cumulative Effect, Period Of Adoption, Adjustment [Member] \| Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss	us-gaap_FinancingReceivableAllowanceForCreditLosses	$ (304,000,000)

Accumulated Other Comprehensive Income (Loss), Cash Flow Hedge, After Reclassification And Tax

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- Definition

The accumulated other adjustment out of other comprehensive income, after tax.

+ References

No definition available.

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- Definition

Accumulated Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax

+ References

No definition available.

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- Definition

Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

+ References

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-Publisher FASB
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- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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