Loan Sale and Servicing Activities and Variable Interest Entities (Non-Consolidated VIEs) (Details) - Variable Interest Entity, Primary Beneficiary [Member] - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
PNC Risk of Loss	$ 11,003	$ 10,729
Carrying Value of Assets Owned by PNC	10,917	10,800
Carrying Value of Liabilities Owned by PNC	745	838
Commercial Mortgage-Backed Securitizations [Member]
PNC Risk of Loss	1,420	1,498
Carrying Value of Assets Owned by PNC	1,420	1,498
Carrying Value of Liabilities Owned by PNC		1
Residential Mortgage-Backed Securitizations [Member]
PNC Risk of Loss	6,579	6,680
Carrying Value of Assets Owned by PNC	6,579	6,680
Carrying Value of Liabilities Owned by PNC	2	1
Tax Credit Investments And Other [Member]
PNC Risk of Loss	3,004	2,551
Carrying Value of Assets Owned by PNC	2,918	2,622
Carrying Value of Liabilities Owned by PNC	$ 743	$ 836

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

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=52262685&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=52262685&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_VariableInterestEntitiesByClassificationOfEntityAxis=us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- 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: