CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 250.9	$ 242.9	$ 495.9	$ 459.1
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	133.1	2.4	188.4	(34.2)
Other adjustments to comprehensive income, net of tax	4.6	(4.9)	4.3	(1.3)
Other comprehensive income (loss), net of tax:	137.7	(2.5)	192.7	(35.5)
Comprehensive income	388.6	240.4	688.6	423.6
Less: Comprehensive income attributable to non-controlling interests	1.4	1.6	2.2	2.8
Comprehensive income attributable to Penske Automotive Group common stockholders	$ 387.2	$ 238.8	$ 686.4	$ 420.8