Financial Derivatives (Derivatives Designated As Hedging Instruments Under GAAP) (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Derivative [Line Items]
Derivative Asset, Fair Value	$ 4,851	$ 5,234
Derivative Liability, Fair Value	3,827	4,027
Derivative Notional Amount	371,549	340,317
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Asset, Fair Value	1,172	1,261
Derivative Liability, Fair Value	225	186
Derivative Notional Amount	53,342	49,061
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Asset, Fair Value	3,679	3,973
Derivative Liability, Fair Value	3,602	3,841
Derivative Notional Amount	318,207	291,256
Fair Value Hedging [Member] \| Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Asset, Fair Value	742	830
Derivative Liability, Fair Value	184	176
Derivative Notional Amount	27,710	25,163
Fair Value Hedging [Member] \| Designated as Hedging Instrument [Member] \| Receive Fixed Swaps [Member]
Derivative [Line Items]
Derivative Asset, Fair Value	733	827
Derivative Liability, Fair Value	59	38
Derivative Notional Amount	23,713	20,930
Fair Value Hedging [Member] \| Designated as Hedging Instrument [Member] \| Pay Fixed Swaps [Member]
Derivative [Line Items]
Derivative Asset, Fair Value	9	3
Derivative Liability, Fair Value	125	138
Derivative Notional Amount	3,997	4,233
Cash Flow Hedging [Member] \| Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Asset, Fair Value	430	425
Derivative Liability, Fair Value	36	10
Derivative Notional Amount	24,475	22,769
Cash Flow Hedging [Member] \| Designated as Hedging Instrument [Member] \| Receive Fixed Swaps [Member]
Derivative [Line Items]
Derivative Asset, Fair Value	427	400
Derivative Liability, Fair Value	17	10
Derivative Notional Amount	20,516	19,991
Cash Flow Hedging [Member] \| Designated as Hedging Instrument [Member] \| Forward Purchase Commitments [Member]
Derivative [Line Items]
Derivative Asset, Fair Value	3	25
Derivative Liability, Fair Value	19
Derivative Notional Amount	3,959	2,778
Net Investment Hedging [Member] \| Designated as Hedging Instrument [Member] \| Foreign Exchange Contract [Member]
Derivative [Line Items]
Derivative Asset, Fair Value		6
Derivative Liability, Fair Value	5
Derivative Notional Amount	$ 1,157	$ 1,129

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

+ Details

Name:	invest_DerivativeNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (a),(c)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624163-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 20

-Section 50

-Paragraph 3

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=34720828&loc=SL20225862-175312

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 20

-Section 55

-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=36459792&loc=SL20226000-175313

+ Details

Name:	us-gaap_DerivativeFairValueOfDerivativeAsset
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

+ References

+ Details

Name:	us-gaap_DerivativeFairValueOfDerivativeLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_HedgingDesignationAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_HedgingDesignationAxis=us-gaap_NondesignatedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_FairValueHedgingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=pnc_ReceiveFixedSwapsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=pnc_PayFixedSwapsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_CashFlowHedgingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=pnc_ForwardPurchaseCommitmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_NetInvestmentHedgingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_ForeignExchangeContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: