Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 1,500	$ 1,496	$ 3,194	$ 2,925
Other comprehensive income (loss), before tax and net of reclassifications into Net income
Net change in debt securities	(241)	(2,715)	628	(9,030)
Net change in cash flow hedge derivatives	(316)	(701)	211	(2,459)
Pension and other postretirement benefit plan adjustments	6	8	(4)	62
Net change in Other	3	(4)	7	(7)
Other comprehensive income (loss), before tax and net of reclassifications into Net income	(548)	(3,412)	842	(11,434)
Income tax benefit (expense) related to items of other comprehensive income	131	785	(195)	2,667
Other comprehensive income (loss), after tax and net of reclassifications into Net income	(417)	(2,627)	647	(8,767)
Comprehensive income (loss)	1,083	(1,131)	3,841	(5,842)
Less: Comprehensive income attributable to noncontrolling interests	17	15	34	36
Comprehensive income (loss) attributable to PNC	$ 1,066	$ (1,146)	$ 3,807	$ (5,878)