Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 1,496	$ 1,103	$ 2,925	$ 2,929
Other comprehensive income (loss), before tax and net of reclassifications into Net income
Net change in debt securities	(2,715)	46	(9,030)	(1,148)
Net change in cash flow hedge derivatives	(701)	222	(2,459)	(553)
Pension and other postretirement benefit plan adjustments	8	(43)	62	(13)
Net change in Other	(4)		(7)	1
Other comprehensive income (loss), before tax and net of reclassifications into Net income	(3,412)	225	(11,434)	(1,713)
Income tax benefit (expense) related to items of other comprehensive income	785	(52)	2,667	406
Other comprehensive income (loss), after tax and net of reclassifications into Net income	(2,627)	173	(8,767)	(1,307)
Comprehensive income (loss)	(1,131)	1,276	(5,842)	1,622
Less: Comprehensive income attributable to noncontrolling interests	15	12	36	22
Comprehensive income (loss) attributable to PNC	$ (1,146)	$ 1,264	$ (5,878)	$ 1,600