Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 1,640	$ 1,490	$ 4,565	$ 4,419
Other comprehensive income (loss), before tax and net of reclassifications into Net income
Net change in debt securities	(1,738)	(323)	(10,768)	(1,471)
Net change in cash flow hedge derivatives	(1,025)	(174)	(3,484)	(727)
Pension and other postretirement benefit plan adjustments	2	2	64	(11)
Net change in Other	4	1	(3)	2
Other comprehensive income (loss), before tax and net of reclassifications into Net income	(2,757)	(494)	(14,191)	(2,207)
Income tax benefit (expense) related to items of other comprehensive income	629	110	3,296	516
Other comprehensive income (loss), after tax and net of reclassifications into Net income	(2,128)	(384)	(10,895)	(1,691)
Comprehensive income (loss)	(488)	1,106	(6,330)	2,728
Less: Comprehensive income attributable to noncontrolling interests	16	16	52	38
Comprehensive income (loss) attributable to PNC	$ (504)	$ 1,090	$ (6,382)	$ 2,690