CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 923.4	$ 1,058.6	$ 1,386.2
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustment	(91.9)	66.1	(154.6)
Other adjustments to comprehensive income, net of tax:	(9.0)	5.7	(12.8)
Other comprehensive (loss) income, net of tax	(100.9)	71.8	(167.4)
Comprehensive income	822.5	1,130.4	1,218.8
Less: Comprehensive income attributable to non-controlling interests	4.0	6.0	5.3
Comprehensive income attributable to Penske Automotive Group common stockholders	$ 818.5	$ 1,124.4	$ 1,213.5