Loan Sale and Servicing Activities and Variable Interest Entities (Non-Consolidated VIEs) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Aggregate Assets	$ 123,165	$ 110,805
Aggregate Liabilities	118,605	106,341
PNC Risk of Loss	7,205	7,948
Carrying Value of Assets Owned by PNC	7,239	7,973
Carrying Value of Liabilities Owned by PNC	782	831
Commercial Mortgage-Backed Securitizations [Member]
Aggregate Assets	53,436	65,757
Aggregate Liabilities	53,436	65,757
PNC Risk of Loss	1,550	1,747
Carrying Value of Assets Owned by PNC	1,550	1,747
Carrying Value of Liabilities Owned by PNC	1
Residential Mortgage-Backed Securitizations [Member]
Aggregate Assets	62,236	37,962
Aggregate Liabilities	62,236	37,962
PNC Risk of Loss	3,385	4,171
Carrying Value of Assets Owned by PNC	3,385	4,171
Carrying Value of Liabilities Owned by PNC	4	5
Tax Credit Investments And Other [Member]
Aggregate Assets	7,493	7,086
Aggregate Liabilities	2,933	2,622
PNC Risk of Loss	2,270	2,030
Carrying Value of Assets Owned by PNC	2,304	2,055
Carrying Value of Liabilities Owned by PNC	$ 777	$ 826

Aggregate assets of variable interest entities

No definition available.

Name:	pnc_VariableInterestEntitiesAggregateAssets
Namespace Prefix:	pnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Aggregate liabilities of variable interest entities

+ References

No definition available.

+ Details

Name:	pnc_VariableInterestEntitiesAggregateLiabilities
Namespace Prefix:	pnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 50

-Paragraph 4

-Subparagraph b

-URI http://asc.fasb.org/extlink&oid=28200181&loc=d3e5728-111685

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 50

-Paragraph 6

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=28200181&loc=d3e5747-111685

+ Details

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

- Definition

Carrying amount of the assets in the reporting entity's statement of financial position that relate to the reporting entity's variable interest in the Variable Interest Entity (VIE), where the reporting entity is not the VIE's primary beneficiary.

+ References

+ Details

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

- Definition

Carrying amount of the liabilities in the reporting entity's statement of financial position that relate to the reporting entity's variable interest in the Variable Interest Entity (VIE), where the reporting entity is not the VIE's primary beneficiary.

+ References

+ Details

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

- Details

Name:	us-gaap_FinancialInstrumentAxis=pnc_CommercialMortgageBackedSecuritizationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=pnc_ResidentialMortgageBackedSecuritizationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=pnc_TaxCreditInvestmentsAndOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: