CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 937.9	$ 973.4	$ 1,114.2
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	166.9	(91.9)	66.1
Other adjustments to comprehensive income, net of tax	10.7	(9.0)	5.7
Other comprehensive income (loss), net of tax	177.6	(100.9)	71.8
Comprehensive income	1,115.5	872.5	1,186.0
Less: Comprehensive income attributable to non-controlling interests	3.3	4.0	6.0
Comprehensive income attributable to Penske Automotive Group common stockholders	$ 1,112.2	$ 868.5	$ 1,180.0