Consolidated Statement of Comprehensive Income - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net income	$ 4,143,000,000	$ 4,207,000,000	$ 4,212,000,000
Other Comprehensive Income (Loss), before Tax [Abstract]
Net unrealized gains (losses) on non-OTTI securities, Before Tax	(569,000,000)	375,000,000	(1,211,000,000)
Net unrealized gains (losses) on OTTI securities	(13,000,000)	79,000,000	231,000,000
Net unrealized gains (losses) on cash flow hedge derivatives	127,000,000	168,000,000	(527,000,000)
Pension and other postretirement benefit plan adjustments, net activity, Before tax	(54,000,000)	(446,000,000)	852,000,000
Other	(42,000,000)	(39,000,000)	21,000,000
Other comprehensive income (loss), before tax and net of reclassifications into Net income	(551,000,000)	137,000,000	(634,000,000)
Income tax benefit (expense) related to items of other comprehensive income	178,000,000	(70,000,000)	236,000,000
Other comprehensive income (loss), after tax and net of reclassifications into Net income	(373,000,000)	67,000,000	(398,000,000)
Comprehensive income	3,770,000,000	4,274,000,000	3,814,000,000
Less: Comprehensive income (loss) attributable to noncontrolling interests (a)	37,000,000	23,000,000	11,000,000
Comprehensive income attributable to PNC	$ 3,733,000,000	$ 4,251,000,000	$ 3,803,000,000