Consolidated Statement of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
Statement of Income and Comprehensive Income [Abstract]
Net income	$ 925		$ 834		$ 2,282		$ 2,578
Other Comprehensive Income (Loss), before Tax [Abstract]
Net unrealized gains on non-OTTI securities	466		368		862		877
Net unrealized gains (losses) on OTTI securities	448		(121)		862		66
Net unrealized gains (losses) on cash flow hedge derivatives	(23)		295		(107)		330
Pension and other postretirement benefit plan adjustments	22		3		109		14
Other	13	[1]	(12)	[1]	(5)	[1]	27	[1]
Other comprehensive income, before tax and net of reclassifications into Net income	926		533		1,721		1,314
Income tax expense related to items of other comprehensive income	(337)		(205)		(625)		(486)
Other comprehensive income, after tax and net of reclassifications into Net income	589		328		1,096		828
Comprehensive income	1,514		1,162		3,378		3,406
Less: Comprehensive income (loss) attributable to noncontrolling interests	(14)		4		(13)		(2)
Comprehensive income attributable to PNC	$ 1,528		$ 1,158		$ 3,391		$ 3,408

[1] Consists of foreign currency translation adjustments and deferred tax adjustments on BlackRock's other comprehensive income in 2012.