Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net income from continuing operations	$ 3,003	$ 4,591	$ 4,558
Other comprehensive income (loss), before tax and net of reclassifications into Net income
Net change in Other	10	17	18
Other comprehensive income (loss), before tax and net of reclassifications into Net income	2,548	1,966	(739)
Income tax benefit (expense) related to items of other comprehensive income	(577)	(442)	156
Other comprehensive income (loss), after tax and net of reclassifications into Net income	1,971	1,524	(583)
Net income from discontinued operations	4,555	827	788
Other comprehensive income (loss), after tax and net of reclassifications into Net income	1,971	1,524	(583)
Comprehensive income	9,529	6,942	4,763
Less: Comprehensive income attributable to noncontrolling interests	41	49	45
Comprehensive income attributable to PNC	9,488	6,893	4,718
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	5	(55)
Income tax benefit (expense) related to items of other comprehensive income	(33)	(1)	12
Other comprehensive income (loss), after tax and net of reclassifications into Net income	115	4	(43)
Continuing Operations
Other comprehensive income (loss), before tax and net of reclassifications into Net income
Net change in debt securities	1,811	1,489	(540)
Net change in cash flow hedge derivatives	497	297	(178)
Pension and other postretirement benefit plan adjustments	82	158	16
Net change in Other	10	17	18
Other comprehensive income (loss), before tax and net of reclassifications into Net income	2,400	1,961	(684)
Income tax benefit (expense) related to items of other comprehensive income	(544)	(441)	144
Other comprehensive income (loss), after tax and net of reclassifications into Net income	$ 1,856	$ 1,520	$ (540)