Consolidated Statement of Changes in Equity - USD ($) shares in Millions, $ in Millions		Total		Cumulative Effect, Period of Adoption, Adjustment	[7]	Cumulative Effect, Period of Adoption, Adjusted Balance	[1]	Common stock		Common stock Cumulative Effect, Period of Adoption, Adjusted Balance		Capital Surplus - Preferred Stock		Capital Surplus - Preferred Stock Cumulative Effect, Period of Adoption, Adjusted Balance	[1]	Capital Surplus - Common Stock and Other		Capital Surplus - Common Stock and Other Cumulative Effect, Period of Adoption, Adjusted Balance	[1]	Retained Earnings		Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	[7]	Retained Earnings Cumulative Effect, Period of Adoption, Adjusted Balance	[1]	AOCI Attributable to Parent [Member]		AOCI Attributable to Parent [Member] Cumulative Effect, Period of Adoption, Adjusted Balance	[1]	Treasury Stock		Treasury Stock Cumulative Effect, Period of Adoption, Adjusted Balance	[1]	Noncontrolling Interests		Noncontrolling Interests Cumulative Effect, Period of Adoption, Adjusted Balance	[1]
Beginning Balance (in shares) at Dec. 31, 2020	[1]							424
Common Stock
Treasury stock activity, shares								(4)
Ending Balance, (in shares) at Dec. 31, 2021	[1]							420
Equity, Beginning Balance at Dec. 31, 2020	[1]	$ 54,041						$ 2,713				$ 3,517				$ 12,367				$ 46,848						$ 2,770				$ (14,205)				$ 31
Common Stock
Net income		5,725																		5,674														51
Other comprehensive income (loss), net of tax		(2,361)																								(2,361)
Cash Dividends
Common		(2,056)																		(2,056)
Preferred		(233)																		(233)
Preferred stock discount accretion												5								(5)
Preferred stock issuance	[2]	1,487										1,487
Common stock activity	[3]	25														25
Treasury stock activity		(823)														84														(907)
Other		(79)														(28)																		(51)
Equity, Ending Balance at Dec. 31, 2021	[1]	$ 55,726						$ 2,713				5,009				12,448				50,228						409				(15,112)				31
Common Stock
Treasury stock activity, shares								(19)
Ending Balance, (in shares) at Dec. 31, 2022	[1]							401		401
Common Stock
Accounting Standards Update [Extensible Enumeration]		Accounting Standards Update 2016-13 [Member]
Net income		$ 6,113																		6,041														72
Other comprehensive income (loss), net of tax		(10,581)																								(10,581)
Cash Dividends
Common		(2,391)																		(2,391)
Preferred		(301)																		(301)
Preferred stock discount accretion												5								(5)
Preferred stock issuance	[4],[5]	2,232										2,232
Common stock activity	[3]	31						$ 1								30
Treasury stock activity		(3,543)														61														(3,604)
Preferred stock redemption	[6]	(1,500)										(1,500)
Other		26														91																		(65)
Equity, Ending Balance at Dec. 31, 2022		45,812	[1]	$ 26		$ 45,838		$ 2,714	[1]	$ 2,714	[1]	5,746	[1]	$ 5,746		12,630	[1]	$ 12,630		53,572	[1]	$ 26		$ 53,598		(10,172)	[1],[8]	$ (10,172)		(18,716)	[1]	$ (18,716)		38	[1]	$ 38
Common Stock
Treasury stock activity, shares								(3)
Ending Balance, (in shares) at Dec. 31, 2023	[1]							398
Common Stock
Net income		5,647																		5,578														69
Other comprehensive income (loss), net of tax		2,460																								2,460
Cash Dividends
Common		(2,461)																		(2,461)
Preferred		(417)																		(417)
Preferred stock discount accretion												8								(8)
Preferred stock issuance	[9]	1,487										1,487
Common stock activity	[3]	32						$ 2								30
Treasury stock activity		(415)														78														(493)
Preferred stock redemption	[10]	(1,000)										(1,000)
Other		(30)														41																		(71)
Equity, Ending Balance at Dec. 31, 2023	[1]	$ 51,141						$ 2,716				$ 6,241				$ 12,779				$ 56,290						$ (7,712)	[8]			$ (19,209)				$ 36

[1] The par value of our preferred stock outstanding was less than $0.5 million at each date and, therefore, is excluded from this presentation.

[2] On September 13, 2021, PNC issued 1,500,000 depositary shares each representing 1/100th ownership in a share of 3.400% fixed-rate reset non-cumulative perpetual preferred stock, Series T, with a par value of $1 per share.

[3] Common stock activity totaled less than 0.5 million shares issued.

[4] On April 26, 2022, PNC issued 1,000,000 depositary shares each representing 1/100th ownership in a share of 6.000% fixed-rate reset non-cumulative perpetual preferred stock, Series U, with a par value of $1 per share.

[5] On August 19, 2022, PNC issued 1,250,000 depositary shares each representing 1/100th ownership in a share of 6.200% fixed-rate reset non-cumulative perpetual preferred stock, Series V, with a par value of $1 per share.

[6] On November 1, 2022, PNC redeemed all 15,000 shares of its Series P preferred stock, as well as all 60,000,000 depositary shares each representing a fractional interest in such shares.

[7] Represents the cumulative effect of adopting ASU 2022-02.

[8] AOCI included pretax losses of $293 million and $314 million from derivatives that hedged the purchase of investment securities classified as held to maturity at December 31, 2023 and December 31, 2022, respectively.

[9] On February 7, 2023, PNC issued 1,500,000 depositary shares each representing 1/100th ownership in a share of 6.250% fixed-rate reset non-cumulative perpetual preferred stock, Series W, with a par value of $1 per share.

[10] On November 1, 2023, PNC redeemed all 10,000 shares of its Series O preferred stock, as well as all 1,000,000 depositary shares each representing a fractional interest in such shares.