Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
CURRENT ASSETS:
Cash and cash equivalents	$ 72.6	$ 60.4
Receivables, net of allowance for credit losses of $1.7 million and $5.4 million, respectively	858.8	730.0
Inventory	2,048.3	1,847.9
Other current assets	158.3	173.4
Total Current Assets	3,138.0	2,811.7
AUTO LOANS RECEIVABLE, net of allowance for credit losses of $57.5 million at December 31, 2022	303.1	0.0
PROPERTY AND EQUIPMENT, NET	3,607.2	3,419.5
OPERATING LEASE ASSETS	323.5	284.0
GOODWILL	1,320.1	1,235.3
OTHER INTANGIBLE ASSETS, NET	837.0	743.5
OTHER ASSETS	530.8	449.6
Total Assets	10,059.7	8,943.6
CURRENT LIABILITIES:
Vehicle floorplan payable	2,109.3	1,457.6
Accounts payable	327.6	395.9
Commercial paper	50.0	340.0
Current maturities of long-term debt	12.6	12.2
Current portion of non-recourse debt	10.7	0.0
Accrued payroll and benefits	238.0	279.9
Other current liabilities	657.5	574.2
Total Current Liabilities	3,405.7	3,059.8
LONG-TERM DEBT, NET OF CURRENT MATURITIES	3,586.9	2,846.2
NON-RECOURSE DEBT, NET OF CURRENT PORTION	312.9	0.0
NONCURRENT OPERATING LEASE LIABILITIES	296.9	260.1
DEFERRED INCOME TAXES	76.5	78.2
OTHER LIABILITIES	333.0	322.3
COMMITMENTS AND CONTINGENCIES (Note 21)
SHAREHOLDERS' EQUITY:
Common stock, par value $0.01 per share; 1,500,000,000 shares authorized; 63,562,149 shares issued at December 31, 2022, and 86,562,149 shares issued at December 31, 2021, including shares held in treasury	0.6	0.8
Additional paid-in capital	3.1	3.2
Retained earnings	3,663.7	4,639.9
Treasury stock, at cost; 15,915,358 and 23,951,543 shares held, respectively	(1,619.6)	(2,266.9)
Total Shareholders' Equity	2,047.8	2,377.0
Total Liabilities and Shareholders' Equity	10,059.7	8,943.6
Trade [Member]
CURRENT LIABILITIES:
Vehicle floorplan payable	946.6	489.9
Non-Trade [Member]
CURRENT LIABILITIES:
Vehicle floorplan payable	$ 1,162.7	$ 967.7