CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenue:
Total revenues	$ 5,524.4	$ 5,152.0	$ 15,988.9	$ 15,230.7
Cost of sales:
Total cost of sales	4,701.8	4,407.8	13,574.7	12,991.4
Gross profit	822.6	744.2	2,414.2	2,239.3
Selling, general and administrative expenses	646.1	581.2	1,869.8	1,722.8
Depreciation	24.3	21.5	70.0	66.8
Operating income	152.2	141.5	474.4	449.7
Floor plan interest expense	(16.4)	(11.9)	(45.6)	(37.8)
Other interest expense	(27.8)	(25.1)	(79.2)	(61.8)
Equity in earnings of affiliates	30.9	25.6	70.9	43.1
Income from continuing operations before income taxes	138.9	130.1	420.5	393.2
Income taxes	(44.7)	(41.7)	(136.0)	(128.4)
Income from continuing operations	94.2	88.4	284.5	264.8
Income (loss) from discontinued operations, net of tax	0.1	0.1	(0.3)	(1.1)
Net income	94.3	88.5	284.2	263.7
Less: (Loss) income attributable to non-controlling interests	(0.1)	1.0	1.0	3.4
Net income attributable to Penske Automotive Group common stockholders	$ 94.4	$ 87.5	$ 283.2	$ 260.3
Basic earnings per share attributable to Penske Automotive Group common stockholders:
Continuing operations (in dollars per share)	$ 1.10	$ 1.03	$ 3.30	$ 3.03
Discontinued operations (in dollars per share)				(0.01)
Net income attributable to Penske Automotive Group common stockholders (in dollars per share)	$ 1.10	$ 1.03	$ 3.30	$ 3.02
Shares used in determining basic earnings per share (in shares)	85.9	85.2	85.9	86.2
Diluted earnings per share attributable to Penske Automotive Group common stockholders:
Continuing operations (in dollars per share)	$ 1.10	$ 1.03	$ 3.30	$ 3.03
Discontinued operations (in dollars per share)				(0.01)
Net income attributable to Penske Automotive Group common stockholders (in dollars per share)	$ 1.10	$ 1.03	$ 3.30	$ 3.02
Shares used in determining diluted earnings per share (in shares)	86.0	85.2	85.9	86.3
Amounts attributable to Penske Automotive Group common stockholders:
Income from continuing operations	$ 94.2	$ 88.4	$ 284.5	$ 264.8
Less: (Loss) income attributable to non-controlling interests	(0.1)	1.0	1.0	3.4
Income from continuing operations, net of tax	94.3	87.4	283.5	261.4
Income (loss) from discontinued operations, net of tax	0.1	0.1	(0.3)	(1.1)
Net income attributable to Penske Automotive Group common stockholders	$ 94.4	$ 87.5	$ 283.2	$ 260.3
Cash dividends per share (in dollars per share)	$ 0.32	$ 0.28	$ 0.93	$ 0.81
Retail Automotive Dealership
Revenue:
Total revenues	$ 5,085.4	$ 4,772.1	$ 14,882.5	$ 14,121.8
Cost of sales:
Total cost of sales	4,341.2	4,097.4	12,684.0	12,080.1
Retail Commercial Truck Dealership
Revenue:
Total revenues	299.6	266.1	739.8	782.3
Cost of sales:
Total cost of sales	255.3	227.9	619.1	672.6
Commercial Vehicle Distribution and Other
Revenue:
Total revenues	139.4	113.8	366.6	326.6
Cost of sales:
Total cost of sales	$ 105.3	$ 82.5	$ 271.6	$ 238.7