CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 341.5	$ 356.3	$ 1,086.9	$ 879.8
Other comprehensive income (loss):
Foreign currency translation adjustment	(132.4)	(42.6)	(281.2)	(40.7)
Unrealized gain on interest rate swaps:
Unrealized gain arising during the period, net of tax provision of $0.0, $0.0, $0.0, and $1.1, respectively	0.0	0.0	0.0	3.0
Reclassification adjustment for loss included in floor plan interest expense, net of tax benefit of $0.0, $0.1, $0.0, and $0.3, respectively	0.0	0.3	0.0	0.8
Unrealized gain on interest rate swaps, net of tax	0.0	0.3	0.0	3.8
Other adjustments to comprehensive income, net	2.4	(0.5)	6.9	6.6
Other comprehensive income (loss), net of tax	(130.0)	(42.8)	(274.3)	(30.3)
Comprehensive income	211.5	313.5	812.6	849.5
Less: Comprehensive income attributable to non-controlling interests	0.5	0.8	2.8	2.6
Comprehensive income attributable to Penske Automotive Group common stockholders	$ 211.0	$ 312.7	$ 809.8	$ 846.9