CONSOLIDATED CONDENSED STATEMENTS OF INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenue:
Total revenues	$ 7,468.5	$ 6,906.9	$ 14,807.5	$ 13,882.3
Cost of sales:
Total cost of sales	6,195.5	5,669.9	12,282.2	11,413.6
Gross profit	1,273.0	1,237.0	2,525.3	2,468.7
Selling, general, and administrative expenses	858.1	817.7	1,703.0	1,615.5
Depreciation	34.1	31.7	68.0	63.6
Operating income	380.8	387.6	754.3	789.6
Floor plan interest expense	(30.8)	(9.0)	(58.7)	(16.5)
Other interest expense	(24.2)	(17.0)	(45.0)	(33.5)
Equity in earnings of affiliates	74.5	138.0	156.6	257.6
Income before income taxes	400.3	499.6	807.2	997.2
Income taxes	(97.7)	(123.7)	(205.0)	(251.8)
Net income	302.6	375.9	602.2	745.4
Less: Income attributable to non-controlling interests	1.8	1.9	3.1	3.5
Net income attributable to Penske Automotive Group common stockholders	$ 300.8	$ 374.0	$ 599.1	$ 741.9
Basic earnings per share attributable to Penske Automotive Group common stockholders:
Net income attributable to Penske Automotive Group common stockholders (in dollars per share)	$ 4.41	$ 4.93	$ 8.72	$ 9.70
Shares used in determining basic earnings per share (in shares)	68,175,825	75,793,239	68,689,106	76,501,402
Diluted earnings per share attributable to Penske Automotive Group common stockholders:
Net income attributable to Penske Automotive Group common stockholders (in dollars per share)	$ 4.41	$ 4.93	$ 8.72	$ 9.70
Shares used in determining diluted earnings per share (in shares)	68,190,828	75,817,119	68,704,109	76,525,282
Amounts attributable to Penske Automotive Group common stockholders:
Net income	$ 302.6	$ 375.9	$ 602.2	$ 745.4
Less: Income attributable to non-controlling interests	1.8	1.9	3.1	3.5
Net income attributable to Penske Automotive Group common stockholders	$ 300.8	$ 374.0	$ 599.1	$ 741.9
Cash dividends per share (in dollars per share)	$ 0.66	$ 0.50	$ 1.27	$ 0.97
Retail automotive dealership
Revenue:
Total revenues	$ 6,406.0	$ 5,997.3	$ 12,705.8	$ 12,026.5
Cost of sales:
Total cost of sales	5,320.1	4,937.3	10,557.3	9,915.8
Retail commercial truck dealership
Revenue:
Total revenues	919.2	768.7	1,814.8	1,561.0
Cost of sales:
Total cost of sales	772.4	632.7	1,521.0	1,283.8
Commercial vehicle distribution and other
Revenue:
Total revenues	143.3	140.9	286.9	294.8
Cost of sales:
Total cost of sales	$ 103.0	$ 99.9	$ 203.9	$ 214.0