Fair Value (Reconciliation of Recurring Fair Value Measurements) (Details) (Level 3 [Member], Fair Value, Measurements, Recurring [Member], USD $) In Millions	3 Months Ended				9 Months Ended					3 Months Ended				9 Months Ended						3 Months Ended				9 Months Ended				3 Months Ended			9 Months Ended				3 Months Ended				9 Months Ended				3 Months Ended	9 Months Ended			3 Months Ended				9 Months Ended				3 Months Ended				9 Months Ended				3 Months Ended				9 Months Ended				3 Months Ended	9 Months Ended				3 Months Ended				9 Months Ended				3 Months Ended				9 Months Ended				3 Months Ended				9 Months Ended				3 Months Ended				9 Months Ended				3 Months Ended				9 Months Ended				3 Months Ended				9 Months Ended						3 Months Ended				9 Months Ended
	Sep. 30, 2011 Black Rock Series C Preferred Stock [Member] Other Assets [Member]		Sep. 30, 2010 Black Rock Series C Preferred Stock [Member] Other Assets [Member]		Sep. 30, 2011 Black Rock Series C Preferred Stock [Member] Other Assets [Member]		Sep. 30, 2010 Black Rock Series C Preferred Stock [Member] Other Assets [Member]		Sep. 30, 2010 Mortgage-backed Securities Agency [Member] Residential Mortgage-backed Securities [Member] Available-for-sale Securities [Member]	Sep. 30, 2011 Mortgage-backed Securities Non-agency [Member] Residential Mortgage-backed Securities [Member] Available-for-sale Securities [Member]		Sep. 30, 2010 Mortgage-backed Securities Non-agency [Member] Residential Mortgage-backed Securities [Member] Available-for-sale Securities [Member]		Sep. 30, 2011 Mortgage-backed Securities Non-agency [Member] Residential Mortgage-backed Securities [Member] Available-for-sale Securities [Member]		Sep. 30, 2010 Mortgage-backed Securities Non-agency [Member] Residential Mortgage-backed Securities [Member] Available-for-sale Securities [Member]		Sep. 30, 2010 Mortgage-backed Securities Non-agency [Member] Commercial Mortgage Backed Securities [Member] Available-for-sale Securities [Member]		Sep. 30, 2011 Asset backed [Member] Available-for-sale Securities [Member]		Sep. 30, 2010 Asset backed [Member] Available-for-sale Securities [Member]		Sep. 30, 2011 Asset backed [Member] Available-for-sale Securities [Member]		Sep. 30, 2010 Asset backed [Member] Available-for-sale Securities [Member]		Sep. 30, 2011 State and Municipal [Member] Available-for-sale Securities [Member]	Sep. 30, 2010 State and Municipal [Member] Available-for-sale Securities [Member]		Sep. 30, 2011 State and Municipal [Member] Available-for-sale Securities [Member]		Sep. 30, 2010 State and Municipal [Member] Available-for-sale Securities [Member]		Sep. 30, 2011 Other Debt Securities [Member] Available-for-sale Securities [Member]		Sep. 30, 2010 Other Debt Securities [Member] Available-for-sale Securities [Member]		Sep. 30, 2011 Other Debt Securities [Member] Available-for-sale Securities [Member]		Sep. 30, 2010 Other Debt Securities [Member] Available-for-sale Securities [Member]		Sep. 30, 2010 Corporate Stocks And Other [Member] Available-for-sale Securities [Member]	Sep. 30, 2011 Corporate Stocks And Other [Member] Available-for-sale Securities [Member]	Sep. 30, 2010 Corporate Stocks And Other [Member] Available-for-sale Securities [Member]		Sep. 30, 2011 Commercial Mortgages [Member] Assets Held-for-sale [Member]		Sep. 30, 2010 Commercial Mortgages [Member] Assets Held-for-sale [Member]		Sep. 30, 2011 Commercial Mortgages [Member] Assets Held-for-sale [Member]		Sep. 30, 2010 Commercial Mortgages [Member] Assets Held-for-sale [Member]		Sep. 30, 2011 Direct Investments Equity [Member] Equity Method Investments [Member]		Sep. 30, 2010 Direct Investments Equity [Member] Equity Method Investments [Member]		Sep. 30, 2011 Direct Investments Equity [Member] Equity Method Investments [Member]		Sep. 30, 2010 Direct Investments Equity [Member] Equity Method Investments [Member]		Sep. 30, 2011 Indirect Investments Equity [Member] Equity Method Investments [Member]		Sep. 30, 2010 Indirect Investments Equity [Member] Equity Method Investments [Member]		Sep. 30, 2011 Indirect Investments Equity [Member] Equity Method Investments [Member]		Sep. 30, 2010 Indirect Investments Equity [Member] Equity Method Investments [Member]		Sep. 30, 2011 Other Assets Fair Value [Member] Other Assets [Member]	Sep. 30, 2011 Other Assets Fair Value [Member] Other Assets [Member]	Sep. 30, 2010 Other Assets Fair Value [Member] Other Assets [Member]		Jun. 30, 2010 Other Assets Fair Value [Member] Other Assets [Member]	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011 Available-for-sale Securities [Member]		Sep. 30, 2010 Available-for-sale Securities [Member]		Sep. 30, 2011 Available-for-sale Securities [Member]		Sep. 30, 2010 Available-for-sale Securities [Member]		Sep. 30, 2011 Derivative [Member]		Sep. 30, 2010 Derivative [Member]		Sep. 30, 2011 Derivative [Member]		Sep. 30, 2010 Derivative [Member]		Sep. 30, 2011 Trading Securities - Debt [Member]		Sep. 30, 2010 Trading Securities - Debt [Member]		Sep. 30, 2011 Trading Securities - Debt [Member]		Sep. 30, 2010 Trading Securities - Debt [Member]		Sep. 30, 2011 Residential Mortgage Servicing Rights MSRs [Member]		Sep. 30, 2010 Residential Mortgage Servicing Rights MSRs [Member]		Sep. 30, 2011 Residential Mortgage Servicing Rights MSRs [Member]		Sep. 30, 2010 Residential Mortgage Servicing Rights MSRs [Member]		Sep. 30, 2011 Equity Method Investments [Member]		Sep. 30, 2010 Equity Method Investments [Member]		Sep. 30, 2011 Equity Method Investments [Member]		Sep. 30, 2010 Equity Method Investments [Member]		Sep. 30, 2011 Residential Mortgage Loans Portfolio [Member]	Jun. 30, 2011 Residential Mortgage Loans Portfolio [Member]	Sep. 30, 2011 Other Assets [Member]		Sep. 30, 2010 Other Assets [Member]		Sep. 30, 2011 Other Assets [Member]		Sep. 30, 2010 Other Assets [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 426		$ 298		$ 396		$ 486		$ 5	$ 6,454		$ 7,635		$ 7,233		$ 8,302		$ 6		$ 951		$ 1,150		$ 1,045		$ 1,254		$ 341	$ 237		$ 228		$ 266		$ 75		$ 82		$ 73		$ 53		$ 47	$ 4	$ 47		$ 856		$ 1,036		$ 877		$ 1,050		$ 849		$ 650		$ 749		$ 595		$ 664		$ 618		$ 635		$ 593		$ 8	$ 7	$ 23		$ 7	$ 11,740		$ 12,881		$ 12,428		$ 14,151		$ 7,821		$ 9,151		$ 8,583		$ 9,933		$ 60		$ 85		$ 77		$ 50		$ 56		$ 73		$ 69		$ 89		$ 996		$ 963		$ 1,033		$ 1,332		$ 1,513		$ 1,268		$ 1,384		$ 1,188		$ 2	$ 4	$ 434		$ 305		$ 403		$ 509
Included in earnings	(80)	[1]	56	[1]	(50)	[1]	(128)	[1]		(7)	[1]	(17)	[1]	(71)	[1]	(132)	[1]			(2)	[1]	(14)	[1]	(5)	[1]	(67)	[1]						5	[1]					(2)	[1]							4	[1]	11	[1]	4	[1]	33	[1]	39	[1]	47	[1]	73	[1]	135	[1]	26	[1]	26	[1]	96	[1]	67	[1]						(228)	[1]	6	[1]	(131)	[1]	(474)	[1]	(9)	[1]	(31)	[1]	(78)	[1]	(194)	[1]	89	[1]	45	[1]	195	[1]	87	[1]	1	[1]	1	[1]	(2)	[1]	(2)	[1]	(298)	[1]	(149)	[1]	(369)	[1]	(472)	[1]	65	[1]	73	[1]	169	[1]	202	[1]			(80)	[1]	56	[1]	(50)	[1]	(128)	[1]
Included in other comprehensive income										(183)	[1]	269	[1]	(1)	[1]	949	[1]			(8)	[1]	62	[1]	35	[1]	180	[1]		(4)	[1]	3	[1]	(21)	[1]	2	[1]	2	[1]	6	[1]	6	[1]			(1)	[1]																											(4)	[1]		(189)	[1]	329	[1]	43	[1]	1,109	[1]	(189)	[1]	329	[1]	43	[1]	1,113	[1]																																									(4)	[1]
Purchases														45						48				48							121				1				3																40				142				15				40					1				105				454				49				217				1				4																48				55				182				2						1
Sales														(280)																									(3)												(13)				(67)				(103)				(46)				(112)									(113)				(511)								(283)																												(113)				(215)
Issuances																																																																												24				94																												24				94
Settlements	(172)				(172)					(276)				(938)						(93)				(227)				(9)			(20)								1					(4)			(29)				(37)																				(1)	(1)				(686)				(1,724)				(378)				(1,188)				(62)				(188)				(6)				(16)				(38)				(122)														(173)				(173)
Purchases, issuance, and settlements, net							(4)		(5)			(306)				(1,536)						(73)				(242)							(18)				(12)				(16)		(34)		(33)				(19)				(55)				43				10				(9)				(25)				(12)					(449)				(2,041)				(425)				(1,850)				(10)				(17)				(3)				(16)				(26)				(72)				34				(15)										(16)
Transfers Into Level 3																		2	[2]														1	[2]							29	[2]																																								32	[2]							32	[2]
Transfers Out of Level 3																(2)	[2]	(8)	[2]																(26)	[2]			(26)	[2]																																				(30)	[2]			(30)	[2]	(10)	[2]	(26)	[2]			(26)	[2]	(10)	[2]									(4)	[2]			(4)	[2]
Ending Balance	174		354		174		354			5,988		7,581		5,988		7,581				896		1,125		896		1,125		332	233		332		233		52		72		52		72		13		13		831		1,028		831		1,028		861		740		861		740		659		635		659		635		7	7	7		7	10,623		12,767		10,623		12,767		7,268		9,024		7,268		9,024		88		120		88		120		47		71		47		71		684		788		684		788		1,520		1,375		1,520		1,375		4	4	181		361		181		361
Unrealized gains or losses on assets held on Consolidated Balance Sheet	(80)		56		(50)		(128)			(30)		(57)		(93)		(211)				(5)		(14)		(14)		(67)													(1)								4		17		3		42		29		42		60		112		27		22		98		54							(265)		(45)		(209)		(580)		(35)		(71)		(108)		(278)		84		42		153		86						(5)		(4)		(294)		(153)		(360)		(464)		56		64		158		166				(80)		56		(50)		(128)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance																																																																												444	[3]	355	[3]	460	[3]	506	[3]
Included in Earnings																																																																												(86)	[1],[3]	52	[1],[3]	(36)	[1],[3]	(121)	[1],[3]
Sales																																																																												1	[3]			9	[3]
Settlements																																																																												(167)	[3]			(241)	[3]
Purchases, issuance, and settlements, net																																																																														(4)	[3]			17	[3]
Transfer into Level 3																																																																																		1	[2],[3]
Ending Balance																																																																												192	[3]	403	[3]	192	[3]	403	[3]
Unrealized gains or losses on liabilities held on Consolidated Balance Sheet																																																																												$ (76)	[3]	$ 50	[3]	$ (47)	[3]	$ (122)	[3]

[1] Losses for assets are bracketed while losses for liabilities are not.

[2] PNC’s policy is to recognize transfers in and transfers out as of the end of the reporting period.

[3] Financial derivatives.