CONSOLIDATED STATEMENT OF EQUITY - 6 months ended Jun. 30, 2018 - USD ($) $ in Millions	Total Stockholders' Equity Attributable to Penske Automotive Group	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Non-controlling Interest	Total
Balance at Dec. 31, 2017	$ 2,395.2		$ 532.3	$ 2,009.4	$ (146.5)	$ 32.8	$ 2,428.0
Balance (in shares) at Dec. 31, 2017		85,787,507
Increase (decrease) in stockholders' equity
Adoption of ASC 606 (Note 1)	6.6			6.6			6.6
Equity compensation	9.0		9.0				9.0
Equity compensation (in shares)		330,186
Repurchases of common stock	(55.8)		(55.8)				(55.8)
Repurchases of common stock (in shares)		(1,252,624)
Dividends	(59.0)			(59.0)			(59.0)
Purchase of subsidiary shares from non-controlling interest	(1.4)		(1.4)			(3.1)	(4.5)
Distributions to non-controlling interest						(0.7)	(0.7)
Foreign currency translation	(36.5)				(36.5)	(1.1)	(37.6)
Other	(3.6)		(0.2)		(3.4)	0.4	(3.2)
Net income	242.7			242.7		0.3	243.0
Balance at Jun. 30, 2018	$ 2,497.2		$ 483.9	$ 2,199.7	$ (186.4)	$ 28.6	$ 2,525.8
Balance (in shares) at Jun. 30, 2018		84,865,069