Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net income from continuing operations	$ 1,490	$ 1,532	$ 4,419	$ 1,547
Other comprehensive income (loss), before tax and net of reclassifications into Net income
Net change in Other	1		2	10
Other comprehensive income (loss), before tax and net of reclassifications into Net income	(494)	(107)	(2,207)	2,861
Income tax benefit (expense) related to items of other comprehensive income	110	35	516	(663)
Other comprehensive income (loss), after tax and net of reclassifications into Net income	(384)	(72)	(1,691)	2,198
Net income from discontinued operations				4,555
Other comprehensive income (loss), after tax and net of reclassifications into Net income	(384)	(72)	(1,691)	2,198
Comprehensive income	1,106	1,460	2,728	8,300
Less: Comprehensive income attributable to noncontrolling interests	16	13	38	27
Comprehensive income attributable to PNC	1,090	1,447	2,690	8,273
Discontinued Operations, Disposed of by Sale
Other comprehensive income (loss), before tax and net of reclassifications into Net income
Other comprehensive income (loss), before tax and net of reclassifications into Net income				148
Income tax benefit (expense) related to items of other comprehensive income				(33)
Other comprehensive income (loss), after tax and net of reclassifications into Net income				115
Continuing Operations
Other comprehensive income (loss), before tax and net of reclassifications into Net income
Net change in debt securities	(323)	10	(1,471)	2,028
Net change in cash flow hedge derivatives	(174)	(119)	(727)	678
Pension and other postretirement benefit plan adjustments	2	2	(11)	(3)
Net change in Other	1		2	10
Other comprehensive income (loss), before tax and net of reclassifications into Net income	(494)	(107)	(2,207)	2,713
Income tax benefit (expense) related to items of other comprehensive income	110	35	516	(630)
Other comprehensive income (loss), after tax and net of reclassifications into Net income	$ (384)	$ (72)	$ (1,691)	$ 2,083