Consolidated Statement of Changes in Equity - USD ($) $ in Millions		Total	Series S Preferred Stock	Common Stock	Preferred Stock Including Additional Paid in Capital	Common Stock Including Additional Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Noncontrolling Interest
Beginning Balance (in shares) at Dec. 31, 2015				504,000,000
Common Stock [Abstract]
Treasury stock activity, shares				(19,000,000)
Ending Balance, (in shares) at Dec. 31, 2016				485,000,000
Common Stock, Beginning Balance at Dec. 31, 2015				$ 2,708.0
Capital surplus - Preferred Stock, Beginning Balance at Dec. 31, 2015	[1]				$ 3,452.0
Capital surplus - Common Stock, Beginning Balance at Dec. 31, 2015						$ 12,745.0
Retained Earnings, Beginning Balance at Dec. 31, 2015							$ 29,043.0
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance at Dec. 31, 2015		$ 130.0						$ 130.0
Treasury Stock, Beginning Balance at Dec. 31, 2015									$ (3,368.0)
Noncontrolling interests, Beginning Balance at Dec. 31, 2015										$ 1,270.0
Total Equity, Beginning Balance at Dec. 31, 2015		45,980.0
Common Stock [Abstract]
Net income		3,985.0					3,903.0			82.0
Other comprehensive income (loss), net of tax		(395.0)						(395.0)
Dividends, Cash [Abstract]
Common		(1,061.0)					(1,061.0)
Preferred		(209.0)					(209.0)
Preferred stock discount accretion					6.0		(6.0)
Preferred stock issuance - Series S (b)	[2]	519.0			519.0
Common stock activity	[3]	19.0		1.0		18.0
Treasury stock activity		(1,829.0)				(131.0)			(1,698.0)
Other		(155.0)				42.0				(197.0)
Common Stock, Ending Balance at Dec. 31, 2016				$ 2,709.0
Capital surplus - Preferred Stock, Ending Balance at Dec. 31, 2016	[1]				3,977.0
Capital surplus - Common Stock, Ending Balance at Dec. 31, 2016						12,674.0
Retained Earnings, Ending Balance at Dec. 31, 2016							31,670.0
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance at Dec. 31, 2016		(265.0)						(265.0)
Treasury Stock, Ending Balance at Dec. 31, 2016									(5,066.0)
Noncontrolling interests, Ending Balance at Dec. 31, 2016										1,155.0
Total Equity, Ending Balance at Dec. 31, 2016		46,854.0
Dividends, Cash [Abstract]
Par value less than $.5 million at each date		$ 0.5
Preferred stock issuance, shares			5,250
Preferred stock, par value		$ 1	$ 1
Treasury stock activity, shares				(12,000,000)
Ending Balance, (in shares) at Dec. 31, 2017				473,000,000
Common Stock [Abstract]
Net income		$ 5,388.0					5,338.0			50.0
Other comprehensive income (loss), net of tax		117.0						117.0
Dividends, Cash [Abstract]
Common		(1,266.0)					(1,266.0)
Preferred		(236.0)					(236.0)
Preferred stock discount accretion					6.0		(6.0)
Redemption of noncontrolling interests (d)	[4]	(1,000.0)					(19.0)			(981.0)
Common stock activity	[3]	18.0		$ 1.0		17.0
Treasury stock activity		(2,147.0)				(309.0)			(1,838.0)
Other		(143.0)			2.0	7.0				(152.0)
Common Stock, Ending Balance at Dec. 31, 2017		2,710.0		$ 2,710.0
Capital surplus - Preferred Stock, Ending Balance at Dec. 31, 2017	[1]				3,985.0
Capital surplus - Common Stock, Ending Balance at Dec. 31, 2017						12,389.0
Retained Earnings, Ending Balance at Dec. 31, 2017		35,481.0					35,481.0
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance at Dec. 31, 2017		(148.0)						(148.0)
Treasury Stock, Ending Balance at Dec. 31, 2017		(6,904.0)							(6,904.0)
Noncontrolling interests, Ending Balance at Dec. 31, 2017		72.0								72.0
Total Equity, Ending Balance at Dec. 31, 2017		47,585.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of ASU adoptions	[5]	(16.0)					(22.0)	6.0
Dividends, Cash [Abstract]
Par value less than $.5 million at each date		$ 0.5
Preferred stock, par value		$ 1
Treasury stock activity, shares				(16,000,000)
Ending Balance, (in shares) at Dec. 31, 2018				457,000,000
Common Stock [Abstract]
Net income		$ 5,346.0					5,301.0			45.0
Other comprehensive income (loss), net of tax		(583.0)						(583.0)
Dividends, Cash [Abstract]
Common		(1,601.0)					(1,601.0)
Preferred		(236.0)					(236.0)
Preferred stock discount accretion					4.0		(4.0)
Common stock activity	[3]	20.0		$ 1.0		19.0
Treasury stock activity		(2,651.0)				(101.0)			(2,550.0)
Other		(94.0)			(3.0)	(16.0)				(75.0)
Common Stock, Ending Balance at Dec. 31, 2018		2,711.0		$ 2,711.0
Capital surplus - Preferred Stock, Ending Balance at Dec. 31, 2018	[1]				$ 3,986.0
Capital surplus - Common Stock, Ending Balance at Dec. 31, 2018						$ 12,291.0
Retained Earnings, Ending Balance at Dec. 31, 2018		38,919.0					$ 38,919.0
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance at Dec. 31, 2018		(725.0)						$ (725.0)
Treasury Stock, Ending Balance at Dec. 31, 2018		(9,454.0)							$ (9,454.0)
Noncontrolling interests, Ending Balance at Dec. 31, 2018		42.0								$ 42.0
Total Equity, Ending Balance at Dec. 31, 2018		47,770.0
Dividends, Cash [Abstract]
Common stock activity, shares	[3]			500,000
Par value less than $.5 million at each date		$ 0.5

[1] The par value of our preferred stock outstanding was less than $.5 million at each date and, therefore, is excluded from this presentation.

[2] On November 1, 2016, PNC issued 5,250 shares of Series S preferred stock with a $1 par value.

[3] Common stock activity totaled less than .5 million shares issued.

[4] Relates to the redemption of Perpetual Trust Securities in the first quarter of 2017. See Note 15 in our 2017 Annual Report on Form 10-K for additional information.

[5] Represents the cumulative effect of adopting ASU 2014-09, ASU 2016-01, ASU 2017-12 and ASU 2018-02. See Recently Adopted Accounting Standards portion of Note 1 Accounting Policies for additional detail on the adoption of these ASUs.