Consolidated Statement of Changes in Equity - USD ($)		Total	Series K Preferred Stock	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, 2014						523,000,000
Common Stock, Beginning Balance at Dec. 31, 2014						$ 2,705,000,000
Capital surplus - Preferred Stock, Beginning Balance at Dec. 31, 2014	[1]						$ 3,946,000,000
Capital surplus - Common Stock, Beginning Balance at Dec. 31, 2014								$ 12,627,000,000
Retained Earnings, Beginning Balance at Dec. 31, 2014									$ 26,200,000,000
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance at Dec. 31, 2014		$ 503,000,000								$ 503,000,000
Treasury Stock, Beginning Balance at Dec. 31, 2014											$ (1,430,000,000)
Noncontrolling interests, Beginning Balance at Dec. 31, 2014												$ 1,523,000,000
Total Equity, Beginning Balance at Dec. 31, 2014		46,074,000,000
Dividends, Cash [Abstract]
Preferred stock redemption, shares	[2]		50,000
Beginning Balance (in shares) at Dec. 31, 2014						523,000,000
Common Stock [Abstract]
Common stock activity, shares						1,000,000
Ending Balance, (in shares) at Dec. 31, 2015						504,000,000
Common Stock, Beginning Balance at Dec. 31, 2014						$ 2,705,000,000
Capital surplus - Preferred Stock, Beginning Balance at Dec. 31, 2014	[1]						3,946,000,000
Capital surplus - Common Stock, Beginning Balance at Dec. 31, 2014								12,627,000,000
Retained Earnings, Beginning Balance at Dec. 31, 2014									26,200,000,000
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance at Dec. 31, 2014		503,000,000								503,000,000
Treasury Stock, Beginning Balance at Dec. 31, 2014											(1,430,000,000)
Noncontrolling interests, Beginning Balance at Dec. 31, 2014												1,523,000,000
Total Equity, Beginning Balance at Dec. 31, 2014		46,074,000,000
Common Stock [Abstract]
Net income		4,143,000,000							4,106,000,000			37,000,000
Other comprehensive income (loss), net of tax		(373,000,000)								(373,000,000)
Dividends, Cash [Abstract]
Common		(1,038,000,000)							(1,038,000,000)
Preferred		(219,000,000)							(219,000,000)
Preferred stock discount accretion							6,000,000		(6,000,000)
Preferred stock redemption – Series K (b)	[2]	(500,000,000)					(500,000,000)
Common stock activity		49,000,000				$ 3,000,000		46,000,000
Treasury stock activity, shares						(20,000,000)
Treasury stock activity		(1,994,000,000)						(56,000,000)			(1,938,000,000)
Other		(162,000,000)						128,000,000				(290,000,000)
Common Stock, Ending Balance at Dec. 31, 2015						$ 2,708,000,000
Capital surplus - Preferred Stock, Ending Balance at Dec. 31, 2015	[1]						3,452,000,000
Capital surplus - Common Stock, Ending Balance at Dec. 31, 2015								12,745,000,000
Retained Earnings, Ending Balance at Dec. 31, 2015									29,043,000,000
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance at Dec. 31, 2015		130,000,000								130,000,000
Treasury Stock, Ending Balance at Dec. 31, 2015											(3,368,000,000)
Noncontrolling interests, Ending Balance at Dec. 31, 2015												1,270,000,000
Total Equity, Ending Balance at Dec. 31, 2015		$ 45,980,000,000
Dividends, Cash [Abstract]
Common Stock, Dividends, Per Share, Declared		$ 2.01
Preferred stock redemption, value	[2]		$ (500,000,000)
Depositary Shares	[2]		500,000
Ending Balance, (in shares) at Dec. 31, 2016						485,000,000
Common Stock [Abstract]
Net income		$ 3,985,000,000							3,903,000,000			82,000,000
Other comprehensive income (loss), net of tax		(395,000,000)								(395,000,000)
Dividends, Cash [Abstract]
Common		(1,061,000,000)							(1,061,000,000)
Preferred		(209,000,000)							(209,000,000)
Preferred stock discount accretion							6,000,000		(6,000,000)
Preferred stock issuance – Series S (c)	[3]	519,000,000					519,000,000
Common stock activity	[4]	19,000,000				$ 1,000,000		18,000,000
Treasury stock activity, shares						(19,000,000)
Treasury stock activity		(1,829,000,000)						(131,000,000)			(1,698,000,000)
Other		(155,000,000)						42,000,000				(197,000,000)
Common Stock, Ending Balance at Dec. 31, 2016		2,709,000,000				$ 2,709,000,000
Capital surplus - Preferred Stock, Ending Balance at Dec. 31, 2016	[1]						3,977,000,000
Capital surplus - Common Stock, Ending Balance at Dec. 31, 2016								12,674,000,000
Retained Earnings, Ending Balance at Dec. 31, 2016		31,670,000,000							31,670,000,000
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance at Dec. 31, 2016		(265,000,000)								(265,000,000)
Treasury Stock, Ending Balance at Dec. 31, 2016		5,066,000,000									(5,066,000,000)
Noncontrolling interests, Ending Balance at Dec. 31, 2016		1,155,000,000										1,155,000,000
Total Equity, Ending Balance at Dec. 31, 2016		$ 46,854,000,000
Dividends, Cash [Abstract]
Common Stock, Dividends, Per Share, Declared		$ 2.12
Preferred stock issuance, shares	[3]			5,250
Preferred stock, par value		$ 1		$ 1	[3]
Par value less than $.5 million at each date	[5]	$ 500,000
Common stock activity, shares	[4]					500,000
Ending Balance, (in shares) at Dec. 31, 2017						473,000,000
Common Stock [Abstract]
Net income		5,388,000,000							5,338,000,000			50,000,000
Other comprehensive income (loss), net of tax		117,000,000								117,000,000
Dividends, Cash [Abstract]
Common		(1,266,000,000)							(1,266,000,000)
Preferred		(236,000,000)							(236,000,000)
Preferred stock discount accretion							6,000,000		(6,000,000)
Redemption of noncontrolling interests	[6]	(1,000,000,000)							(19,000,000)			(981,000,000)
Common stock activity	[4]	18,000,000				$ 1,000,000		17,000,000
Treasury stock activity, shares						(12,000,000)
Treasury stock activity		(2,147,000,000)						(309,000,000)			(1,838,000,000)
Other		(143,000,000)					2,000,000	7,000,000				(152,000,000)
Common Stock, Ending Balance at Dec. 31, 2017		2,710,000,000				$ 2,710,000,000
Capital surplus - Preferred Stock, Ending Balance at Dec. 31, 2017	[1]						$ 3,985,000,000
Capital surplus - Common Stock, Ending Balance at Dec. 31, 2017								$ 12,389,000,000
Retained Earnings, Ending Balance at Dec. 31, 2017		35,481,000,000							$ 35,481,000,000
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance at Dec. 31, 2017		(148,000,000)								$ (148,000,000)
Treasury Stock, Ending Balance at Dec. 31, 2017		6,904,000,000									$ (6,904,000,000)
Noncontrolling interests, Ending Balance at Dec. 31, 2017		72,000,000										$ 72,000,000
Total Equity, Ending Balance at Dec. 31, 2017		$ 47,585,000,000
Dividends, Cash [Abstract]
Common Stock, Dividends, Per Share, Declared		$ 2.60
Preferred stock, par value		$ 1
Par value less than $.5 million at each date	[1],[5]	$ 500,000

[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 May 4, 2015, we redeemed all 50,000 shares of our Series K preferred stock, as well as all 500,000 Depositary Shares representing fractional interests in such shares, resulting in net outflow of $500 million.

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

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

[5] Par value less than $.5 million at each date.

[6] Relates to the redemption of Perpetual Trust Securities in the first quarter of 2017. See Note 15 Equity for additional information.