Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 1,499	$ 1,344
Other comprehensive income (loss), before tax and net of reclassifications into Net income
Net change in debt securities	929	(179)
Net change in cash flow hedge derivatives	825	(250)
Pension and other postretirement benefit plan adjustments	(2)	(2)
Net change in Other	(1)	(2)
Other comprehensive income (loss), before tax and net of reclassifications into Net income	1,751	(433)
Income tax benefit (expense) related to items of other comprehensive income	(423)	103
Other comprehensive income (loss), after tax and net of reclassifications into Net income	1,328	(330)
Comprehensive income	2,827	1,014
Less: Comprehensive income attributable to noncontrolling interests	18	14
Comprehensive income attributable to PNC	$ 2,809	$ 1,000