CONSOLIDATED CONDENSED STATEMENTS OF INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenue:
Total revenues	$ 5,773.8	$ 5,009.1
Cost of sales:
Total cost of sales	4,860.6	4,232.4
Gross profit	913.2	776.7
Selling, general and administrative expenses	664.3	641.8
Depreciation	29.3	28.5
Operating income	219.6	106.4
Floor plan interest expense	(9.5)	(17.7)
Other interest expense	(17.9)	(31.7)
Equity in earnings of affiliates	55.4	14.5
Income from continuing operations before income taxes	247.6	71.5
Income taxes	(64.5)	(20.1)
Income from continuing operations	183.1	51.4
Income from discontinued operations, net of tax		0.1
Net income	183.1	51.5
Less: Income (loss) attributable to non-controlling interests	0.6	(0.2)
Net income attributable to Penske Automotive Group common stockholders	$ 182.5	$ 51.7
Basic earnings per share attributable to Penske Automotive Group common stockholders:
Continuing operations (in dollars per share)	$ 2.26	$ 0.64
Discontinued operations (in dollars per share)	0.00	0.00
Net income attributable to Penske Automotive Group common stockholders (in dollars per share)	$ 2.26	$ 0.64
Shares used in determining basic earnings per share (in shares)	80,608,996	81,053,404
Diluted earnings per share attributable to Penske Automotive Group common stockholders:
Continuing operations (in dollars per share)	$ 2.26	$ 0.64
Discontinued operations (in dollars per share)	0.00	0.00
Net income attributable to Penske Automotive Group common stockholders (in dollars per share)	$ 2.26	$ 0.64
Shares used in determining diluted earnings per share (in shares)	80,648,996	81,093,404
Amounts attributable to Penske Automotive Group common stockholders:
Income from continuing operations	$ 183.1	$ 51.4
Less: Income (loss) attributable to non-controlling interests	0.6	(0.2)
Income from continuing operations, net of tax	182.5	51.6
Income from discontinued operations, net of tax		0.1
Net income attributable to Penske Automotive Group common stockholders	$ 182.5	$ 51.7
Cash dividends per share (in dollars per share)	$ 0.43	$ 0.42
Retail Automotive Dealership
Revenue:
Total revenues	$ 5,206.9	$ 4,416.6
Cost of sales:
Total cost of sales	4,407.0	3,738.5
Retail Commercial Truck Dealership
Revenue:
Total revenues	434.7	491.4
Cost of sales:
Total cost of sales	354.7	422.6
Commercial Vehicle Distribution and Other
Revenue:
Total revenues	132.2	101.1
Cost of sales:
Total cost of sales	$ 98.9	$ 71.3