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Financial Derivatives (Referenced/Underlying Assets of Credit Default Swaps) (Details) (Credit Default Swap, Buying Protection [Member])
Dec. 31, 2014
Dec. 31, 2013
Corporation Debt [Member]    
Credit Derivatives [Line Items]    
Credit Default Swaps Underlying Asset Liability Allocation 45.00%pnc_CreditDefaultSwapsUnderlyingAssetLiabilityAllocation
/ us-gaap_CreditDerivativesByContractTypeAxis
= us-gaap_CreditDefaultSwapBuyingProtectionMember
/ us-gaap_UnderlyingAssetClassAxis
= pnc_CorporationDebtMember		 37.00%pnc_CreditDefaultSwapsUnderlyingAssetLiabilityAllocation
/ us-gaap_CreditDerivativesByContractTypeAxis
= us-gaap_CreditDefaultSwapBuyingProtectionMember
/ us-gaap_UnderlyingAssetClassAxis
= pnc_CorporationDebtMember
Commercial Mortgage Backed Securities [Member]    
Credit Derivatives [Line Items]    
Credit Default Swaps Underlying Asset Liability Allocation 55.00%pnc_CreditDefaultSwapsUnderlyingAssetLiabilityAllocation
/ us-gaap_CreditDerivativesByContractTypeAxis
= us-gaap_CreditDefaultSwapBuyingProtectionMember
/ us-gaap_UnderlyingAssetClassAxis
= us-gaap_CommercialMortgageBackedSecuritiesMember		 63.00%pnc_CreditDefaultSwapsUnderlyingAssetLiabilityAllocation
/ us-gaap_CreditDerivativesByContractTypeAxis
= us-gaap_CreditDefaultSwapBuyingProtectionMember
/ us-gaap_UnderlyingAssetClassAxis
= us-gaap_CommercialMortgageBackedSecuritiesMember