Commitments and Guarantees (Analysis of Indemnification and Repurchase Liability for Asserted and Unasserted Claims) (Details) (USD $)	3 Months Ended
	Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Sep. 30, 2011		Jun. 30, 2011		Mar. 31, 2011
Total Repurchase and Indemnification Obligations [Member]
Loss Contingencies [Line Items]
Reserves, Beginning balance	$ 523,000,000		$ 152,000,000		$ 130,000,000		$ 150,000,000		$ 252,000,000		$ 294,000,000
Reserve adjustments, net	41,000,000		453,000,000		44,000,000		31,000,000		24,000,000		14,000,000
RBC Bank USA Acquisition					26,000,000
Losses - loan repurchases and settlements	(81,000,000)		(82,000,000)		(48,000,000)		(45,000,000)		(126,000,000)		(56,000,000)
Reserves, Ending balance	483,000,000		523,000,000		152,000,000		136,000,000		150,000,000		252,000,000
Residential Mortgages [Member]
Loss Contingencies [Line Items]
Repurchase obligations - sold loan portfolios	111,000,000,000						126,700,000,000
Residential Mortgages [Member] | Total Repurchase and Indemnification Obligations [Member]
Loss Contingencies [Line Items]
Reserves, Beginning balance	462,000,000	[1]	101,000,000	[1]	83,000,000	[1]	95,000,000	[1]	124,000,000	[1]	144,000,000	[1]
Reserve adjustments, net	37,000,000	[1]	438,000,000	[1]	32,000,000	[1]	31,000,000	[1]	21,000,000	[1]	14,000,000	[1]
RBC Bank USA Acquisition					26,000,000	[1]
Losses - loan repurchases and settlements	(78,000,000)	[1]	(77,000,000)	[1]	(40,000,000)	[1]	(41,000,000)	[1]	(50,000,000)	[1]	(34,000,000)	[1]
Reserves, Ending balance	421,000,000	[1]	462,000,000	[1]	101,000,000	[1]	85,000,000	[1]	95,000,000	[1]	124,000,000	[1]
Home Equity [Member]
Loss Contingencies [Line Items]
Repurchase obligations - sold loan portfolios	4,300,000,000						4,600,000,000
Home Equity [Member] | Total Repurchase and Indemnification Obligations [Member]
Loss Contingencies [Line Items]
Reserves, Beginning balance	61,000,000	[2]	51,000,000	[2]	47,000,000	[2]	55,000,000	[2]	128,000,000	[2]	150,000,000	[2]
Reserve adjustments, net	4,000,000	[2]	15,000,000	[2]	12,000,000	[2]			3,000,000	[2]
Losses - loan repurchases and settlements	(3,000,000)	[2]	(5,000,000)	[2]	(8,000,000)	[2]	(4,000,000)	[2]	(76,000,000)	[2]	(22,000,000)	[2]
Reserves, Ending balance	$ 62,000,000	[2]	$ 61,000,000	[2]	$ 51,000,000	[2]	$ 51,000,000	[2]	$ 55,000,000	[2]	$ 128,000,000	[2]

[1] Repurchase obligation associated with sold loan portfolios of $111.0 billion and $126.7 billion at September 30, 2012 and September 30, 2011, respectively.

[2] Repurchase obligation associated with sold loan portfolios of $4.3 billion and $4.6 billion at September 30, 2012 and September 30, 2011, respectively. PNC is no longerengaged in the brokered home equity business, which was acquired with National City.