CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Revenue:
Total revenues	$ 31,808.5	$ 31,864.8	$ 30,916.5
Cost of sales:
Total cost of sales	26,591.5	26,647.7	25,769.1
Gross profit	5,217.0	5,217.1	5,147.4
Selling, general, and administrative expenses	3,764.0	3,685.7	3,553.7
Goodwill impairment charges	0.0	0.0	40.7
Depreciation	172.3	161.3	143.7
Operating income	1,280.7	1,370.1	1,409.3
Floor plan interest expense	(170.6)	(193.1)	(135.3)
Other interest expense	(91.6)	(87.8)	(92.6)
Gain on sale of dealership	52.3	0.0	0.0
Equity in earnings of affiliates	192.9	200.7	293.7
Income before income taxes	1,263.7	1,289.9	1,475.1
Income taxes	(325.8)	(316.5)	(360.9)
Net income	937.9	973.4	1,114.2
Less: Income attributable to non-controlling interests	2.5	4.5	5.4
Net income attributable to Penske Automotive Group common stockholders	$ 935.4	$ 968.9	$ 1,108.8
Basic earnings per share attributable to Penske Automotive Group common stockholders:
Net income attributable to Penske Automotive Group common stockholders (in dollars per share)	$ 14.13	$ 14.49	$ 16.31
Shares used in determining basic earnings per share (in shares)	66,199,042	66,882,731	67,963,956
Diluted earnings per share attributable to Penske Automotive Group common stockholders:
Net income attributable to Penske Automotive Group common stockholders (in dollars per share)	$ 14.13	$ 14.49	$ 16.31
Shares used in determining diluted earnings per share (in shares)	66,199,042	66,882,731	67,963,956
Amounts attributable to Penske Automotive Group common stockholders:
Net income	$ 937.9	$ 973.4	$ 1,114.2
Less: Income attributable to non-controlling interests	2.5	4.5	5.4
Net income attributable to Penske Automotive Group common stockholders	$ 935.4	$ 968.9	$ 1,108.8
Cash dividends per share (in dollars per share)	$ 5.18	$ 4.09	$ 2.78
Retail automotive dealership
Revenue:
Total revenues	$ 27,474.6	$ 27,565.8	$ 26,598.2
Cost of sales:
Total cost of sales	22,992.2	23,111.4	22,208.4
Depreciation	150.1	140.7	127.4
Floor plan interest expense	(145.9)	(164.2)	(118.2)
Other interest expense	(76.8)	(82.1)	(90.3)
Equity in earnings of affiliates	0.6	3.1	3.9
Income before income taxes	847.8	842.7	916.1
Retail commercial truck dealership
Revenue:
Total revenues	3,411.3	3,521.1	3,684.3
Cost of sales:
Total cost of sales	2,869.0	2,936.6	3,091.9
Depreciation	16.2	15.1	11.6
Floor plan interest expense	(16.9)	(19.2)	(14.5)
Other interest expense	0.0	0.0	(1.3)
Equity in earnings of affiliates	0.0	0.0	0.0
Income before income taxes	174.7	203.6	225.0
Commercial vehicle distribution and other
Revenue:
Total revenues	922.6	777.9	634.0
Cost of sales:
Total cost of sales	$ 730.3	$ 599.7	$ 468.8