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, 2022			69,681,891
Beginning balance at Dec. 31, 2022	$ 4,174.8	$ 4,148.0	$ 0.0	$ 0.0	$ 4,483.3	$ (335.3)	$ 26.8
Increase (decrease) in stockholders' equity
Equity compensation (in shares)			208,994
Equity compensation	7.8	7.8		7.8
Repurchase of common stock (in shares)			(890,327)
Repurchases of common stock	(111.3)	(111.3)		(7.8)	(103.5)
Dividends	(42.3)	(42.3)			(42.3)
Distributions to non-controlling interest	(0.3)						(0.3)
Foreign currency translation	18.3	18.0				18.0	0.3
Other	4.8	4.8				4.8
Net income	299.6	298.3			298.3		1.3
Ending balance (in shares) at Mar. 31, 2023			69,000,558
Ending balance at Mar. 31, 2023	$ 4,351.4	4,323.3	$ 0.0	0.0	4,635.8	(312.5)	28.1
Beginning balance (in shares) at Dec. 31, 2023	67,111,181		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
Repurchase 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		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