CONSOLIDATED CONDENSED STATEMENTS OF INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenue:
Total revenues	$ 7,590.8	$ 7,447.8	$ 22,735.3	$ 22,255.3
Cost of sales:
Total cost of sales	6,347.6	6,227.4	18,982.8	18,509.6
Gross profit	1,243.2	1,220.4	3,752.5	3,745.7
Selling, general, and administrative expenses	885.2	853.5	2,652.5	2,556.5
Depreciation	40.6	35.4	117.0	103.4
Operating income	317.4	331.5	983.0	1,085.8
Floor plan interest expense	(50.8)	(35.5)	(142.2)	(94.2)
Other interest expense	(22.9)	(24.5)	(64.1)	(69.5)
Equity in earnings of affiliates	60.7	85.0	148.0	241.6
Income before income taxes	304.4	356.5	924.7	1,163.7
Income taxes	(77.4)	(92.1)	(238.6)	(297.1)
Net income	227.0	264.4	686.1	866.6
Less: Income attributable to non-controlling interests	0.9	1.0	3.6	4.1
Net income attributable to Penske Automotive Group common stockholders	$ 226.1	$ 263.4	$ 682.5	$ 862.5
Basic earnings per share attributable to Penske Automotive Group common stockholders:
Net income attributable to Penske Automotive Group common stockholders (in dollars per share)	$ 3.39	$ 3.92	$ 10.20	$ 12.64
Shares used in determining basic earnings per share (in shares)	66,769,195	67,252,265	66,902,644	68,205,621
Diluted earnings per share attributable to Penske Automotive Group common stockholders:
Net income attributable to Penske Automotive Group common stockholders (in dollars per share)	$ 3.39	$ 3.92	$ 10.20	$ 12.64
Shares used in determining diluted earnings per share (in shares)	66,784,587	67,267,230	66,918,036	68,220,586
Amounts attributable to Penske Automotive Group common stockholders:
Net income	$ 227.0	$ 264.4	$ 686.1	$ 866.6
Less: Income attributable to non-controlling interests	0.9	1.0	3.6	4.1
Net income attributable to Penske Automotive Group common stockholders	$ 226.1	$ 263.4	$ 682.5	$ 862.5
Cash dividends per share (in dollars per share)	$ 1.07	$ 0.72	$ 2.90	$ 1.99
Retail automotive dealership
Revenue:
Total revenues	$ 6,340.7	$ 6,325.4	$ 19,434.1	$ 19,031.2
Cost of sales:
Total cost of sales	5,299.2	5,300.1	16,260.4	15,857.4
Retail commercial truck dealership
Revenue:
Total revenues	1,063.3	964.7	2,747.4	2,779.5
Cost of sales:
Total cost of sales	906.2	809.3	2,301.0	2,330.3
Commercial vehicle distribution and other
Revenue:
Total revenues	186.8	157.7	553.8	444.6
Cost of sales:
Total cost of sales	$ 142.2	$ 118.0	$ 421.4	$ 321.9