CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
REVENUES:
New vehicle	$ 821.3	$ 759.9	$ 2,378.8	$ 2,167.9
Used vehicle	457.0	421.7	1,319.2	1,183.5
Parts and service	168.3	154.0	495.9	455.5
Finance and insurance, net	59.0	54.7	170.8	154.1
Total revenues	1,505.6	1,390.3	4,364.7	3,961.0
COST OF SALES:
New vehicle	772.1	713.4	2,232.4	2,035.6
Used vehicle	425.8	391.2	1,220.6	1,090.8
Parts and service	63.1	60.4	189.1	180.7
Total cost of sales	1,261.0	1,165.0	3,642.1	3,307.1
GROSS PROFIT	244.6	225.3	722.6	653.9
OPERATING EXPENSES:
Selling, general and administrative	171.5	159.2	500.5	460.8
Depreciation and amortization	6.7	6.2	19.4	18.0
Other operating expense, net	0.3	1.9	0.2	7.1
Income from operations	66.1	58.0	202.5	168.0
OTHER EXPENSES:
Floor plan interest expense	(3.0)	(2.9)	(9.3)	(9.1)
Other interest expense, net	(9.6)	(11.1)	(28.2)	(29.8)
Swap interest expense	(0.5)	(0.1)	(1.5)	(2.2)
Loss on extinguishment of long-term debt	0	(6.8)	0	(6.8)
Total other expenses, net	(13.1)	(20.9)	(39.0)	(47.9)
Income before income taxes	53.0	37.1	163.5	120.1
INCOME TAX EXPENSE	20.6	14.3	63.4	46.2
INCOME FROM CONTINUING OPERATIONS	32.4	22.8	100.1	73.9
DISCONTINUED OPERATIONS, net of tax	0.1	(0.1)	(0.3)	8.3
NET INCOME	$ 32.5	$ 22.7	$ 99.8	$ 82.2
Basic—
Continuing operations (in dollars per share)	$ 1.09	$ 0.74	$ 3.31	$ 2.40
Discontinued operations (in dollars per share)	$ 0.00	$ 0.00	$ (0.01)	$ 0.27
Net income (in dollars per share)	$ 1.09	$ 0.74	$ 3.30	$ 2.67
Diluted—
Continuing operations (in dollars per share)	$ 1.08	$ 0.73	$ 3.29	$ 2.38
Discontinued operations (in dollars per share)	$ 0.00	$ 0.00	$ (0.01)	$ 0.26
Net income (in dollars per share)	$ 1.08	$ 0.73	$ 3.28	$ 2.64
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic (in shares)	29.8	30.7	30.2	30.8
Restricted stock (in shares)	0.1	0.2	0.1	0.2
Performance share units (in shares)	0.1	0.2	0.1	0.1
Diluted (in shares)	30.0	31.1	30.4	31.1