Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 1,344	$ 1,694
Other comprehensive income (loss), before tax and net of reclassifications into Net income
Net change in debt securities	(179)	869
Net change in cash flow hedge derivatives	(250)	527
Pension and other postretirement benefit plan adjustments	(2)	(10)
Net change in Other	(2)	4
Other comprehensive income (loss), before tax and net of reclassifications into Net income	(433)	1,390
Income tax benefit (expense) related to items of other comprehensive income	103	(326)
Other comprehensive income (loss), after tax and net of reclassifications into Net income	(330)	1,064
Comprehensive income	1,014	2,758
Less: Comprehensive income attributable to noncontrolling interests	14	17
Comprehensive income attributable to PNC	$ 1,000	$ 2,741