CONSOLIDATED CONDENSED STATEMENTS OF EQUITY - USD ($) $ in Millions	Total	Total Penske Automotive Group Stockholders' Equity	Voting and Non-voting Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Non-controlling Interest
Beginning balance (in shares) at Dec. 31, 2023			67,111,181
Beginning balance at Dec. 31, 2023	$ 4,755.6	$ 4,726.2	$ 0.0	$ 0.0	$ 4,990.3	$ (264.1)	$ 29.4
Increase (decrease) in stockholders' equity
Equity compensation (in shares)			159,507
Equity compensation	7.5	7.5		7.5
Repurchases of common stock (in shares)			(221,329)
Repurchases of common stock	(33.2)	(33.2)		(7.5)	(25.7)
Dividends	(58.6)	(58.6)			(58.6)
Distributions to non-controlling interest	(0.3)						(0.3)
Foreign currency translation	(36.6)	(36.8)				(36.8)	0.2
Other	(4.5)	(4.5)			(8.1)	3.6
Net income	216.2	215.2			215.2		1.0
Ending balance (in shares) at Mar. 31, 2024			67,049,359
Ending balance at Mar. 31, 2024	$ 4,846.1	4,815.8	$ 0.0	0.0	5,113.1	(297.3)	30.3
Beginning balance (in shares) at Dec. 31, 2024	66,774,651		66,774,651
Beginning balance at Dec. 31, 2024	$ 5,227.3	5,209.8	$ 0.0	9.1	5,565.2	(364.5)	17.5
Increase (decrease) in stockholders' equity
Equity compensation (in shares)			144,590
Equity compensation	8.0	8.0		8.0
Repurchases of common stock (in shares)			(255,228)
Repurchases of common stock	(40.5)	(40.5)		(17.1)	(23.4)
Dividends	(81.8)	(81.8)			(81.8)
Distributions to non-controlling interest	(0.3)						(0.3)
Foreign currency translation	55.3	55.2				55.2	0.1
Other	(0.3)	(0.3)				(0.3)
Net income	$ 245.0	244.3			244.3		0.7
Ending balance (in shares) at Mar. 31, 2025	66,664,013		66,664,013
Ending balance at Mar. 31, 2025	$ 5,412.7	$ 5,394.7	$ 0.0	$ 0.0	$ 5,704.3	$ (309.6)	$ 18.0