CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Total revenues	$ 22,571.4	$ 19,934.3	$ 17,873.7
Total cost of sales	18,949.5	16,693.3	14,853.4
GROSS PROFIT	3,621.8	3,241.0	3,020.3
Selling, general and administrative expenses	2,545.5	2,179.2	1,926.8
Depreciation and amortization expense	121.1	113.1	92.0
Asset impairments	192.8	33.0	32.9
Restructuring charges	28.4	16.7	0.0
Other operating income	0.0	(10.0)	0.0
INCOME FROM OPERATIONS	734.0	909.1	968.6
INTEREST EXPENSE:
Floorplan interest expense	101.5	108.5	64.1
Other interest expense, net	182.9	141.3	99.8
Other (income) expense	(0.2)	0.7	4.5
INCOME BEFORE INCOME TAXES	449.9	658.5	800.2
Provision for income taxes	126.2	161.5	198.2
Net income from continuing operations	323.7	497.0	602.0
Net income (loss) from discontinued operations	1.5	1.2	(0.4)
NET INCOME	$ 325.2	$ 498.1	$ 601.6
BASIC EARNINGS PER SHARE:
Basic earnings per share continuing operations (in dollars per shares)	$ 25.17	$ 36.88	$ 42.92
Basic earnings per share discontinuing operations (in dollars per shares)	0.12	0.09	(0.03)
Basic earnings per share (in dollars per shares)	25.29	36.96	42.89
DILUTED EARNINGS PER SHARE:
Diluted earnings per share continuing operations (in dollars per shares)	25.13	36.72	42.75
Diluted earnings per share discontinuing operations (in dollars per shares)	0.12	0.09	(0.03)
Total (in dollars per shares)	$ 25.24	$ 36.81	$ 42.73
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Weighted average common shares outstanding basic (in shares)	12,713,382	13,192,518	13,681,660
Weighted average common shares outstanding diluted (in shares)	12,737,232	13,249,884	13,734,799
New vehicle retail sales
Total revenues	$ 10,989.9	$ 9,972.4	$ 8,774.6
Total cost of sales	10,234.5	9,254.5	8,007.6
Used vehicle retail sales
Total revenues	7,195.0	6,179.9	5,693.5
Total cost of sales	6,847.8	5,849.9	5,392.6
Used vehicle wholesale sales
Total revenues	607.3	462.4	441.4
Total cost of sales	608.2	465.7	445.2
Parts and service sales
Total revenues	2,844.6	2,491.0	2,222.3
Total cost of sales	1,259.0	1,123.2	1,008.0
Finance, insurance and other, net
Total revenues	$ 934.6	$ 828.7	$ 741.9