CONSOLIDATED CONDENSED STATEMENTS OF EQUITY - USD ($) $ in Millions	Total Stockholders' Equity Attributable to Penske Automotive Group	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Non-controlling Interest	Total
Balance at Dec. 31, 2018	$ 2,609.1		$ 477.8	$ 2,365.8	$ (234.5)	$ 25.6	$ 2,634.7
Balance (in shares) at Dec. 31, 2018		84,546,970
Increase (decrease) in stockholders' equity
Adoption of ASC | ASC 842	5.0			5.0			5.0
Equity compensation	4.6		4.6				4.6
Equity compensation (in shares)		362,887
Repurchases of common stock	(54.3)		(54.3)				(54.3)
Repurchases of common stock (in shares)		(1,258,348)
Dividends	(32.2)			(32.2)			(32.2)
Purchase of subsidiary shares from non-controlling interest						(4.8)	(4.8)
Distributions to non-controlling interest						(0.1)	(0.1)
Foreign currency translation	7.0				7.0	(0.3)	6.7
Other	1.8				1.8	0.3	2.1
Net income	100.2			100.2		(1.0)	99.2
Balance at Mar. 31, 2019	2,641.2		428.1	2,438.8	(225.7)	19.7	2,660.9
Balance (in shares) at Mar. 31, 2019		83,651,509
Balance at Dec. 31, 2019	2,793.4		320.4	2,675.8	(202.8)	18.2	2,811.6
Balance (in shares) at Dec. 31, 2019		81,084,751
Increase (decrease) in stockholders' equity
Equity compensation	4.9		4.9				4.9
Equity compensation (in shares)		268,722
Repurchases of common stock	(29.4)		(29.4)				(29.4)
Repurchases of common stock (in shares)		(890,195)
Dividends	(34.2)			(34.2)			(34.2)
Foreign currency translation	(92.7)				(92.7)	(0.2)	(92.9)
Other	(4.0)				(4.0)		(4.0)
Net income	51.7			51.7		(0.2)	51.5
Balance at Mar. 31, 2020	$ 2,689.7		$ 295.9	$ 2,693.3	$ (299.5)	$ 17.8	$ 2,707.5
Balance (in shares) at Mar. 31, 2020		80,463,278