Total Equity and Other Comprehensive Income (Other Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Net Unrealized Gains Losses on Non Otti Securities [Abstract]
Increase in net unrealized gains(losses) on non-OTTI securities	$ 519	$ 132
Less: Net gains (losses) realized as a yield adjustment reclassified to investment securities in interest income, before tax	6	7
Less: Net gains (losses) realized on sales of non-OTTI securities reclassified to noninterest income, before tax	9	51
Net unrealized gains (losses) on non-OTTI securities, Before Tax	504	74
Other Comprehensive Income (Loss), Non Otti Securities Adjustment, Tax	(185)	(27)
Net unrealized gains (losses) on non-OTTI securities, Activity, After Tax	319	47
Net Unrealized Gains Losses On Otti Securities [Abstract]
Increase in net unrealized gains (losses) on OTTI securities, Pretax	(39)	2
Less: Net OTTI losses realized in net income, Pre-tax	(1)	(1)
Net unrealized gains (losses) on OTTI securities	(38)	3
Net unrealized gains (losses) on cash flow hedge derivatives, tax	14	(1)
Net unrealized gains (losses) on OTTI securities, Activity, After Tax	(24)	2
Net unrealized gains (losses) on cash flow hedge derivatives [Abstract]
Increase in net unrealized gains (losses) on cash flow hedge derivatives, Pretax	265	298
Less: Net gains (losses) realized as a yield adjustment reclassified to loan interest income, Before Tax	60	64
Less: Net gains (losses) realized as a yield adjustment reclassified to investment securities interest income, Before Tax	5	4
Less: Net gains (losses) realized on sales of securities reclassified to noninterest income, Before Tax		(9)
Net unrealized gains (losses) on cash flow hedge derivatives, Before Tax	200	239
Net unrealized gains (losses) on cash flow hedge derivatives, tax	(73)	(88)
Net unrealized gains (losses) on cash flow hedge derivatives, Net of tax, Total	127	151
Pension and other postretirement benefit plan adjustments [Abstract]
Net pension and other postretirement benefit plan activity, Before tax	2	53
Amortization of actuarial loss (gain) reclassified to other noninterest expense, Before tax	12	9
Amortization of prior service cost (credit) reclassified to other noninterest expense, Before tax	(2)	(2)
Pension and other postretirement benefit plan adjustments, net activity, Pre-Tax	12	60
Pension and other postretirement benefit plan adjustments, net activity, Tax	(4)	(22)
Pension and other postretirement benefit plan adjustments, net activity, After Tax	8	38
Other Comprehensive Income Other Adjustments [Abstract]
PNC's portion of BlackRock's OCI, Before tax	(25)	(25)
Net investment hedge derivatives, Before tax	29	54
Foreign Currency Transaction and Translation Adjustment, before Tax	(29)	(56)
I/O Strip OCI Impact, BeforeTax	(2)
Total Other, net activity, Before tax	(27)	(27)
Total Other, net activity, Tax	(1)	(11)
Total Other, net activity, After tax	(28)	(38)
Other Comprehensive Income Loss Before Tax	651	349
Other Comprehensive Income (Loss), Tax	(249)	(149)
Other Comprehensive Income (Loss), Net of Tax	$ 402	$ 200