Financial Derivatives (Derivatives Total Notional or Contractual Amounts and Estimated Net Fair Values) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	$ 9,656	[1]	$ 9,463	[1]
Derivative Liability, Fair Value	7,574	[2]	7,606	[2]
Derivative Asset, Notional Amount	233,606		242,425
Derivative Liability, Notional Amount	168,775		148,904
Derivative, Collateral, Obligation to Return Cash	944	[1]	1,051	[1]
Derivative, Collateral, Right to Reclaim Cash	966	[2]	843	[2]
Legally Enforceable Master Netting Agreement Asset	5,996	[1]	6,052	[1]
Legally Enforceable Master Netting Agreement Liability	5,996	[2]	6,052	[2]
Derivative Asset, Fair Value, Net	2,716	[1]	2,360	[1]
Derivative Liability, Fair Value, Net	612	[2]	711	[2]
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	1,987	[1]	1,888	[1]
Derivative Liability, Fair Value	145	[2]	116	[2]
Derivative Asset, Notional Amount	26,528		27,018
Derivative Liability, Notional Amount	2,322		2,216
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	7,669	[1]	7,575	[1]
Derivative Liability, Fair Value	7,429	[2]	7,490	[2]
Derivative Asset, Notional Amount	207,078		215,407
Derivative Liability, Notional Amount	166,453		146,688
Not Designated as Hedging Instrument [Member] | Residential Mortgage [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	3,161	[1]	3,458	[1]
Derivative Liability, Fair Value	2,599	[2]	2,893	[2]
Derivative Asset, Notional Amount	127,412		129,789
Derivative Liability, Notional Amount	83,535		67,202
Not Designated as Hedging Instrument [Member] | Residential Mortgage [Member] | Residential Mortgage Servicing Interest Rate Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	3,051	[1]	3,390	[1]
Derivative Liability, Fair Value	2,539	[2]	2,854	[2]
Derivative Asset, Notional Amount	117,857		122,395
Derivative Liability, Notional Amount	77,038		63,226
Not Designated as Hedging Instrument [Member] | Residential Mortgage [Member] | Loan Sales Interest Rate Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	110	[1]	68	[1]
Derivative Liability, Fair Value	60	[2]	39	[2]
Derivative Asset, Notional Amount	9,555		7,394
Derivative Liability, Notional Amount	6,497		3,976
Not Designated as Hedging Instrument [Member] | Commercial Mortgage Banking [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	79	[1]	59	[1]
Derivative Liability, Fair Value	92	[2]	80	[2]
Derivative Asset, Notional Amount	1,884		1,571
Derivative Liability, Notional Amount	1,207		1,149
Not Designated as Hedging Instrument [Member] | Commercial Mortgage Banking [Member] | Interest Rate Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	75	[1]	54	[1]
Derivative Liability, Fair Value	92	[2]	80	[2]
Derivative Asset, Notional Amount	1,789		1,476
Derivative Liability, Notional Amount	1,207		1,149
Not Designated as Hedging Instrument [Member] | Commercial Mortgage Banking [Member] | Credit Default Swap [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	4	[1]	5	[1]
Derivative Asset, Notional Amount	95		95
Not Designated as Hedging Instrument [Member] | Customer Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	4,421	[1]	4,046	[1]
Derivative Liability, Fair Value	4,449	[2]	4,178	[2]
Derivative Asset, Notional Amount	76,762		81,648
Derivative Liability, Notional Amount	80,903		76,447
Not Designated as Hedging Instrument [Member] | Customer Contracts [Member] | Interest Rate Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	4,236	[1]	3,804	[1]
Derivative Liability, Fair Value	4,268	[2]	3,943	[2]
Derivative Asset, Notional Amount	69,485		73,751
Derivative Liability, Notional Amount	73,516		68,981
Not Designated as Hedging Instrument [Member] | Customer Contracts [Member] | Equity Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	1	[1]	5	[1]
Derivative Liability, Fair Value	5	[2]	8	[2]
Derivative Asset, Notional Amount	128		118
Derivative Liability, Notional Amount	57		66
Not Designated as Hedging Instrument [Member] | Customer Contracts [Member] | Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	176	[1]	231	[1]
Derivative Liability, Fair Value	169	[2]	222	[2]
Derivative Asset, Notional Amount	5,491		6,088
Derivative Liability, Notional Amount	5,683		5,832
Not Designated as Hedging Instrument [Member] | Customer Contracts [Member] | Risk Participation Agreement [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	8	[1]	6	[1]
Derivative Liability, Fair Value	7	[2]	5	[2]
Derivative Asset, Notional Amount	1,658		1,691
Derivative Liability, Notional Amount	1,647		1,568
Not Designated as Hedging Instrument [Member] | Other Risk Management Activity [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	8	[1]	12	[1]
Derivative Liability, Fair Value	289	[2]	339	[2]
Derivative Asset, Notional Amount	1,020		2,399
Derivative Liability, Notional Amount	808		1,890
Not Designated as Hedging Instrument [Member] | Other Risk Management Activity [Member] | Interest Rate Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	5	[1]	6	[1]
Derivative Liability, Fair Value	8	[2]	39	[2]
Derivative Asset, Notional Amount	996		2,190
Derivative Liability, Notional Amount	423		1,479
Not Designated as Hedging Instrument [Member] | Other Risk Management Activity [Member] | Credit Default Swap [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value			6	[1]
Derivative Asset, Notional Amount	15		209
Derivative Liability, Notional Amount	0
Not Designated as Hedging Instrument [Member] | Other Risk Management Activity [Member] | Equity Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	3	[1]
Derivative Liability, Fair Value	3	[2]
Derivative Asset, Notional Amount	6
Derivative Liability, Notional Amount	6
Not Designated as Hedging Instrument [Member] | Other Risk Management Activity [Member] | Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value	3	[2]	4	[2]
Derivative Asset, Notional Amount	3
Derivative Liability, Notional Amount	25		25
Not Designated as Hedging Instrument [Member] | Other Risk Management Activity [Member] | Other Derivative Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value	275	[2],[3]	296	[2],[3]
Derivative Liability, Notional Amount	354	[3]	386	[3]
Fair Value Hedging [Member] | Designated as Hedging Instrument [Member] | Interest Rate Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	1,403	[1]	1,316	[1]
Derivative Liability, Fair Value	141	[2]	116	[2]
Derivative Asset, Notional Amount	11,077		10,476
Derivative Liability, Notional Amount	1,996		1,797
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Interest Rate Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	580	[1]	572	[1]
Derivative Asset, Notional Amount	15,187		16,542
Derivative Liability, Notional Amount			93
Net Investment Hedging [Member] | Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	4	[1]
Derivative Liability, Fair Value	4	[2]
Derivative Asset, Notional Amount	264
Derivative Liability, Notional Amount	$ 326		$ 326

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

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

[3] Includes PNC's obligation to fund a portion of certain BlackRock LTIP programs and includes a forward purchase commitment for certain loans upon conversion from a variable rate to a fixed rate.