Fair Value (Recurring Fair Value Measurements) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended		12 Months Ended
	Jun. 30, 2012		Dec. 31, 2011
Assets
Total debt securities	$ 50,896		$ 48,200
Securities available for sale, fair value	51,251		48,568
Total financial derivatives	9,656	[1],[2]	9,463	[1],[2]
Loans held for sale	2,776	[3]	2,365	[3]
Trading securities, fair value	2,121	[4]	2,513	[4]
Total equity investments	1,634		1,504
Total customer resale agreements	542	[3],[5]	732	[3],[5]
Loans	291	[6]	227	[6]
Other, fair value	669		639
Total Assets	69,521		66,658
Liabilities
Total financial derivatives	7,574	[2],[7]	7,606	[2],[7]
Total trading securities sold short	787	[8],[9]	1,016	[8],[9]
Other liabilities	2		3
Total liabilities	8,363		8,625
Fair Value Additional Information [Abstract]
Fair value net derivative assets	2,716		2,360
Fair value net derivative liabilities	612		711
Net unrealized gains (losses)	115		102
Percentage of Trading securities - debt comprised of US Treasury and government agencies securities	50.00%		34.00%
Percentage of Trading securities - debt comprised of residential mortgage-backed securities	25.00%		57.00%
Trading securities	2,121	[4]	2,513	[4]
Unfunded contractual commitments	215
US Treasury and Government Agencies Securities [Member]
Assets
Total debt securities	2,898		3,717
Residential Mortgage-backed Securities [Member] | Mortgage-backed Securities Agency [Member]
Assets
Total debt securities	27,814		26,792
Residential Mortgage-backed Securities [Member] | Mortgage-backed Securities Non-agency [Member]
Assets
Total debt securities	5,887		5,557
Commercial Mortgage Backed Securities [Member] | Mortgage-backed Securities Agency [Member]
Assets
Total debt securities	876		1,140
Commercial Mortgage Backed Securities [Member] | Mortgage-backed Securities Non-agency [Member]
Assets
Total debt securities	2,802		2,756
Asset backed [Member]
Assets
Total debt securities	5,423		3,669
State and Municipal [Member]
Assets
Total debt securities	2,035		1,807
Other Debt Securities [Member]
Assets
Total debt securities	3,161		2,762
Corporate Stocks And Other [Member]
Assets
Securities available for sale, fair value	355		368
Interest Rate Contracts [Member]
Assets
Total financial derivatives	9,460	[1],[2]	9,210	[1],[2]
Liabilities
Total financial derivatives	7,108	[2],[7]	7,071	[2],[7]
Black Rock LTIP [Member]
Liabilities
Total financial derivatives	200	[2],[7]	210	[2],[7]
Other Contract [Member]
Assets
Total financial derivatives	196	[1],[2]	253	[1],[2]
Liabilities
Total financial derivatives	266	[2],[7]	325	[2],[7]
Residential Mortgage [Member]
Assets
Loans held for sale	1,939	[10]	1,522	[10]
Residential Mortgage Servicing Rights MSRs [Member]
Assets
Mortgage servicing rights	581	[11]	647	[11]
Commercial Mortgages [Member]
Assets
Loans held for sale	837	[10]	843	[10]
Direct Investments Equity [Member]
Assets
Total equity investments	957		856
Fair Value Additional Information [Abstract]
Unfunded contractual commitments	39
Indirect Investments Equity [Member]
Assets
Total equity investments	677	[12]	648	[12]
Fair Value Additional Information [Abstract]
Unfunded contractual commitments	176
Number of years over which distributions from indirect equity funds are expected to be received	12
Black Rock Series C Preferred Stock [Member]
Assets
Other, fair value	200	[13]	210	[13]
Other Assets Fair Value [Member]
Assets
Other, fair value	469		429
Debt Securities [Member]
Assets
Trading securities, fair value	2,068	[14],[4],[8]	2,468	[14],[4],[8]
Liabilities
Total trading securities sold short	787	[8],[9]	1,016	[8],[9]
Fair Value Additional Information [Abstract]
Trading securities	2,068	[14],[4],[8]	2,468	[14],[4],[8]
Equity Securities [Member]
Assets
Trading securities, fair value	53	[4]	45	[4]
Fair Value Additional Information [Abstract]
Trading securities	53	[4]	45	[4]
Residential mortgage-backed agency securities with embedded derivatives
Assets
Trading securities, fair value			1,100
Fair Value Additional Information [Abstract]
Trading securities			1,100
Level 1 [Member]
Assets
Total debt securities	1,957		1,659
Securities available for sale, fair value	2,296		2,027
Total financial derivatives	23	[1],[2]
Trading securities, fair value	1,103	[4]	1,100	[4]
Total Assets	3,422		3,127
Liabilities
Total financial derivatives	10	[2],[7]
Total trading securities sold short	745	[8],[9]	997	[8],[9]
Total liabilities	755		997
Fair Value Additional Information [Abstract]
Trading securities	1,103	[4]	1,100	[4]
Level 1 [Member] | US Treasury and Government Agencies Securities [Member]
Assets
Total debt securities	1,957		1,659
Level 1 [Member] | Corporate Stocks And Other [Member]
Assets
Securities available for sale, fair value	339		368
Level 1 [Member] | Interest Rate Contracts [Member]
Assets
Total financial derivatives	23	[1],[2]
Liabilities
Total financial derivatives	10	[2],[7]
Level 1 [Member] | Debt Securities [Member]
Assets
Trading securities, fair value	1,053	[14],[4],[8]	1,058	[14],[4],[8]
Liabilities
Total trading securities sold short	745	[8],[9]	997	[8],[9]
Fair Value Additional Information [Abstract]
Trading securities	1,053	[14],[4],[8]	1,058	[14],[4],[8]
Level 1 [Member] | Equity Securities [Member]
Assets
Trading securities, fair value	50	[4]	42	[4]
Fair Value Additional Information [Abstract]
Trading securities	50	[4]	42	[4]
Level 2 [Member]
Assets
Total debt securities	41,972		39,812
Securities available for sale, fair value	41,988		39,812
Total financial derivatives	9,516	[1],[2]	9,396	[1],[2]
Trading securities, fair value	977	[4]	1,374	[4]
Total customer resale agreements	542	[5]	732	[5]
Loans	284	[6]	222	[6]
Other, fair value	462		422
Total Assets	55,708		53,480
Liabilities
Total financial derivatives	7,275	[2],[7]	7,298	[2],[7]
Total trading securities sold short	42	[8],[9]	19	[8],[9]
Other liabilities	2		3
Total liabilities	7,319		7,320
Fair Value Additional Information [Abstract]
Trading securities	977	[4]	1,374	[4]
Level 2 [Member] | US Treasury and Government Agencies Securities [Member]
Assets
Total debt securities	941		2,058
Level 2 [Member] | Residential Mortgage-backed Securities [Member] | Mortgage-backed Securities Agency [Member]
Assets
Total debt securities	27,814		26,792
Level 2 [Member] | Commercial Mortgage Backed Securities [Member] | Mortgage-backed Securities Agency [Member]
Assets
Total debt securities	876		1,140
Level 2 [Member] | Commercial Mortgage Backed Securities [Member] | Mortgage-backed Securities Non-agency [Member]
Assets
Total debt securities	2,802		2,756
Level 2 [Member] | Asset backed [Member]
Assets
Total debt securities	4,735		2,882
Level 2 [Member] | State and Municipal [Member]
Assets
Total debt securities	1,698		1,471
Level 2 [Member] | Other Debt Securities [Member]
Assets
Total debt securities	3,106		2,713
Level 2 [Member] | Interest Rate Contracts [Member]
Assets
Total financial derivatives	9,328	[1],[2]	9,150	[1],[2]
Liabilities
Total financial derivatives	7,091	[2],[7]	7,065	[2],[7]
Level 2 [Member] | Other Contract [Member]
Assets
Total financial derivatives	188	[1],[2]	246	[1],[2]
Liabilities
Total financial derivatives	184	[2],[7]	233	[2],[7]
Level 2 [Member] | Residential Mortgage [Member]
Assets
Loans held for sale	1,939	[10]	1,522	[10]
Level 2 [Member] | Other Assets Fair Value [Member]
Assets
Other, fair value	462		422
Level 2 [Member] | Debt Securities [Member]
Assets
Trading securities, fair value	974	[14],[4],[8]	1,371	[14],[4],[8]
Liabilities
Total trading securities sold short	42	[8],[9]	19	[8],[9]
Fair Value Additional Information [Abstract]
Trading securities	974	[14],[4],[8]	1,371	[14],[4],[8]
Level 2 [Member] | Equity Securities [Member]
Assets
Trading securities, fair value	3	[4]	3	[4]
Fair Value Additional Information [Abstract]
Trading securities	3	[4]	3	[4]
Level 3 [Member]
Assets
Total debt securities	6,967		6,729
Securities available for sale, fair value	6,967		6,729
Total financial derivatives	117	[1],[2]	67	[1],[2]
Trading securities, fair value	41	[4]	39	[4]
Total equity investments	1,634		1,504
Loans	7	[6]	5	[6]
Other, fair value	207		217
Total Assets	10,391		10,051
Liabilities
Total financial derivatives	289	[2],[7]	308	[2],[7]
Total liabilities	289		308
Fair Value Additional Information [Abstract]
Trading securities	41	[4]	39	[4]
Level 3 [Member] | Residential Mortgage-backed Securities [Member] | Mortgage-backed Securities Non-agency [Member]
Assets
Total debt securities	5,887		5,557
Level 3 [Member] | Asset backed [Member]
Assets
Total debt securities	688		787
Level 3 [Member] | State and Municipal [Member]
Assets
Total debt securities	337		336
Level 3 [Member] | Other Debt Securities [Member]
Assets
Total debt securities	55		49
Level 3 [Member] | Interest Rate Contracts [Member]
Assets
Total financial derivatives	109	[1],[2]	60	[1],[2]
Liabilities
Total financial derivatives	7	[2],[7]	6	[2],[7]
Level 3 [Member] | Black Rock LTIP [Member]
Liabilities
Total financial derivatives	200	[2],[7]	210	[2],[7]
Level 3 [Member] | Other Contract [Member]
Assets
Total financial derivatives	8	[1],[2]	7	[1],[2]
Liabilities
Total financial derivatives	82	[2],[7]	92	[2],[7]
Level 3 [Member] | Residential Mortgage Servicing Rights MSRs [Member]
Assets
Mortgage servicing rights	581	[11]	647	[11]
Level 3 [Member] | Commercial Mortgages [Member]
Assets
Loans held for sale	837	[10]	843	[10]
Level 3 [Member] | Direct Investments Equity [Member]
Assets
Total equity investments	957		856
Level 3 [Member] | Indirect Investments Equity [Member]
Assets
Total equity investments	677	[12]	648	[12]
Level 3 [Member] | Black Rock Series C Preferred Stock [Member]
Assets
Other, fair value	200	[13]	210	[13]
Level 3 [Member] | Other Assets Fair Value [Member]
Assets
Other, fair value	7		7
Level 3 [Member] | Debt Securities [Member]
Assets
Trading securities, fair value	41	[14],[4],[8]	39	[14],[4],[8]
Fair Value Additional Information [Abstract]
Trading securities	$ 41	[14],[4],[8]	$ 39	[14],[4],[8]

[1] Included in Other assets on our Consolidated Balance Sheet.

[2] Amounts at June 30, 2012 and December 31, 2011 are presented gross and are not reduced by the impact of legally enforceable master netting agreementsthat allow PNC to net positive and negative positions and cash collateral held or placed with the same counterparty. At June 30, 2012 and December 31, 2011,respectively, the net asset amounts were $2.7 billion and $2.4 billion and the net liability amounts were $.6 billion and $.7 billion.

[3] Amounts represent items for which the Corporation has elected the fair value option.

[4] Fair value includes net unrealized gains of $115 million at June 30, 2012 compared with net unrealized gains of $102 million at December 31, 2011.

[5] Included in Federal funds sold and resale agreements on our Consolidated Balance Sheet. PNC has elected the fair value option for these items.

[6] Included in Loans on our Consolidated Balance Sheet.

[7] Included in Other liabilities on our Consolidated Balance Sheet.

[8] Approximately 25% of these securities are residential mortgage-backed securities and 50% are US Treasury and government agencies securities at June 30, 2012. Comparable amounts at December 31, 2011 were 57% and 34%, respectively.

[9] Included in Other borrowed funds on our Consolidated Balance Sheet.

[10] Included in Loans held for sale on our Consolidated Balance Sheet. PNC has elected the fair value option for certain commercial and residential mortgage loans held for sale.

[11] Included in Other intangible assets on our Consolidated Balance Sheet.

[12] The indirect equity funds are not redeemable, but PNC receives distributions over the life of the partnership from liquidation of the underlying investments by the investee, which we expect to occur over the next twelve years. The amount of unfunded contractual commitments related to indirect equity investments was $176 million and related to direct equity investments was $39 million as of June 30, 2012, respectively.

[13] PNC has elected the fair value option for these shares.

[14] At December 31, 2011, $1.1 billion of residential mortgage-backed agency securities with embedded derivatives were carried in Trading securities. At June 30, 2012, substantially all of these securities have been sold.