Loan Sale and Servicing Activities and Variable Interest Entities (Consolidated VIEs - Carrying Value) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011		Sep. 30, 2011	Dec. 31, 2010
Cash and due from banks	$ 4,284	[1]	$ 4,105	[1]	$ 3,982	$ 3,297
Interest-earning deposits with banks	2,321	[1]	1,169	[1]
Investment securities	62,814	[1]	60,634	[1]
Loans	181,864	[1],[2],[3],[4]	159,014	[1],[2],[3],[4]	154,543
Allowance for loan and lease losses	(4,039)	[1]	(4,347)	[1]	(4,507)	(4,887)
Equity investments	10,846	[1]	10,134	[1]
Other assets	24,647	[1],[2]	22,698	[1],[2]
Total assets	300,803		271,205
Commercial paper	10,731	[1]	4,271	[1]
Other borrowed funds	1,840	[1]	2,368	[1]
Accrued expenses	4,015		4,175
Other liabilities	5,380		4,874
Total liabilities	259,001		233,959
Variable Interest Entity, Primary Beneficiary [Member]
Cash and due from banks	5	[5],[6]	7	[5],[6]
Interest-earning deposits with banks	6	[5],[6]	325	[5],[6]
Investment securities	10	[5],[6]	109	[5],[6]
Loans	7,816	[5],[6]	6,096	[5],[6]
Allowance for loan and lease losses	(78)	[5],[6]	(91)	[5],[6]
Equity investments	1,725	[5],[6]	1,643	[5],[6]
Other assets	1,388	[5],[6]	1,205	[5],[6]
Total assets	10,872	[5],[6]	9,294	[5],[6]
Commercial paper	6,098	[5],[6]	4,271	[5],[6]
Other borrowed funds	249	[5],[6]	505	[5],[6]
Accrued expenses	151	[5],[6]	155	[5],[6]
Other liabilities	987	[5],[6]	734	[5],[6]
Total liabilities	7,485	[5],[6]	5,665	[5],[6]
Variable Interest Entity, Primary Beneficiary [Member] | Market Street [Member]
Investment securities	10	[5],[6]	109	[5],[6]
Loans	6,087	[5],[6]	4,163	[5],[6]
Other assets	539	[5],[6]	360	[5],[6]
Total assets	6,636	[5],[6]	4,632	[5],[6]
Commercial paper	6,098	[5],[6]	4,271	[5],[6]
Other liabilities	534	[5],[6]	355	[5],[6]
Total liabilities	6,632	[5],[6]	4,626	[5],[6]
Variable Interest Entity, Primary Beneficiary [Member] | Credit Card Securitization Trust [Member]
Interest-earning deposits with banks			317	[5],[6]
Loans	1,729	[5],[6]	1,933	[5],[6]
Allowance for loan and lease losses	(78)	[5],[6]	(91)	[5],[6]
Other assets	36	[5],[6]	7	[5],[6]
Total assets	1,687	[5],[6]	2,166	[5],[6]
Other borrowed funds			287	[5],[6]
Accrued expenses			50	[5],[6]
Total liabilities			337	[5],[6]
Variable Interest Entity, Primary Beneficiary [Member] | Tax Credit Investments And Other [Member]
Cash and due from banks	5	[5],[6]	7	[5],[6]
Interest-earning deposits with banks	6	[5],[6]	8	[5],[6]
Equity investments	1,725	[5],[6]	1,643	[5],[6]
Other assets	813	[5],[6]	838	[5],[6]
Total assets	2,549	[5],[6]	2,496	[5],[6]
Other borrowed funds	249	[5],[6]	218	[5],[6]
Accrued expenses	151	[5],[6]	105	[5],[6]
Other liabilities	453	[5],[6]	379	[5],[6]
Total liabilities	$ 853	[5],[6]	$ 702	[5],[6]

[1] Amounts represent the assets or liabilities of consolidated variable interest entities (VIEs).

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

[3] Net of unearned income, net deferred loan fees, unamortized discounts and premiums, and purchase discounts and premiums totaling $2.9 billion and $2.3 billion atSeptember 30, 2012 and December 31, 2011, respectively.

[4] Future accretable yield related to purchased impaired loans is not included in loans outstanding.

[5] Amounts represent carrying value on PNC’s Consolidated Balance Sheet.

[6] Difference between total assets and total liabilities represents the equity portion of the VIE or intercompany assets and liabilities which are eliminated in consolidation.