Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 1,570	$ 1,640	$ 4,764	$ 4,565
Other comprehensive income (loss), before tax and net of reclassifications into Net income
Net change in debt securities	(932)	(1,738)	(304)	(10,768)
Net change in cash flow hedge derivatives	(35)	(1,025)	176	(3,484)
Pension and other postretirement benefit plan adjustments	1	2	(3)	64
Net change in Other	1	4	8	(3)
Other comprehensive loss, before tax and net of reclassifications into Net income	(965)	(2,757)	(123)	(14,191)
Income tax benefit related to items of other comprehensive income	229	629	34	3,296
Other comprehensive income loss, after tax and net of reclassifications into Net income	(736)	(2,128)	(89)	(10,895)
Comprehensive income (loss)	834	(488)	4,675	(6,330)
Less: Comprehensive income attributable to noncontrolling interests	16	16	50	52
Comprehensive income (loss) attributable to PNC	$ 818	$ (504)	$ 4,625	$ (6,382)