CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
REVENUES	$ 4,470.5	$ 4,130.0
COST OF SALES	3,727.9	3,402.1
GROSS PROFIT	742.6	727.9
Selling, general and administrative expenses	476.1	462.8
Depreciation and amortization expense	23.8	22.4
Asset impairments	0.0	1.1
INCOME FROM OPERATIONS	242.6	241.5
Floorplan interest expense	20.5	12.6
Other interest expense, net	29.3	19.7
Other (income) expense, net	(0.5)	2.8
INCOME BEFORE INCOME TAXES	193.3	206.4
Provision for income taxes	45.8	47.6
Net income from continuing operations	147.4	158.8
Net income (loss) from discontinued operations	0.5	(0.3)
NET INCOME	$ 147.9	$ 158.4
BASIC EARNINGS PER SHARE:
Basic earnings per share continuing operations (in dollar per shares)	$ 10.81	$ 11.16
Basic earnings per share discontinuing operations (in dollar per shares)	0.04	(0.02)
Basic earnings per share (in dollar per shares)	10.84	11.14
DILUTED EARNINGS PER SHARE:
Diluted earnings per share continuing operations (in dollar per shares)	10.76	11.12
Diluted earnings per share discontinuing operations (in dollar per shares)	0.04	(0.02)
Diluted earnings per common share (in dollar per share)	$ 10.80	$ 11.10
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Weighted average common shares outstanding, Basic (in shares)	13,328,721	13,861,289
Weighted average common shares outstanding, Diluted (in shares)	13,388,769	13,914,727
New vehicle retail sales
REVENUES	$ 2,182.6	$ 1,955.7
COST OF SALES	2,023.1	1,769.0
Used vehicle retail sales
REVENUES	1,416.8	1,348.9
COST OF SALES	1,334.7	1,272.1
Used vehicle wholesale sales
REVENUES	106.0	112.0
COST OF SALES	106.9	110.0
Parts and service sales
REVENUES	576.2	548.3
COST OF SALES	263.2	251.0
Finance, insurance and other, net
REVENUES	$ 188.9	$ 165.1