CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 264.4	$ 341.5	$ 866.6	$ 1,086.9
Other comprehensive income (loss):
Foreign currency translation adjustment	(66.4)	(132.4)	(14.7)	(281.2)
Other adjustments to comprehensive income, net	0.1	2.4	8.3	6.9
Other comprehensive income (loss), net of tax	(66.3)	(130.0)	(6.4)	(274.3)
Comprehensive income	198.1	211.5	860.2	812.6
Less: Comprehensive income attributable to non-controlling interests	0.5	0.5	4.0	2.8
Comprehensive income attributable to Penske Automotive Group common stockholders	$ 197.6	$ 211.0	$ 856.2	$ 809.8