Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 1,694	$ 1,429
Other comprehensive income (loss), before tax and net of reclassifications into Net income
Net change in debt securities	869	(6,315)
Net change in cash flow hedge derivatives	527	(1,758)
Pension and other postretirement benefit plan adjustments	(10)	54
Net change in Other	4	(3)
Other comprehensive income (loss), before tax and net of reclassifications into Net income	1,390	(8,022)
Income tax benefit (expense) related to items of other comprehensive income	(326)	1,882
Other comprehensive income (loss), after tax and net of reclassifications into Net income	1,064	(6,140)
Comprehensive income (loss)	2,758	(4,711)
Less: Comprehensive income attributable to noncontrolling interests	17	21
Comprehensive income (loss) attributable to PNC	$ 2,741	$ (4,732)