Consolidated Balance Sheets - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
CURRENT ASSETS:
Cash and cash equivalents		$ 42.0	$ 48.6
Receivables, net		916.7	976.2
Inventory		3,305.8	3,650.5
Other current assets		146.6	208.7
Total Current Assets		4,411.1	4,884.0
PROPERTY AND EQUIPMENT, NET		3,174.6	3,155.3
OPERATING LEASE ASSETS		333.1	0.0
GOODWILL	[1]	1,501.9	1,513.2
OTHER INTANGIBLE ASSETS, NET		581.6	595.4
OTHER ASSETS		541.0	517.2
Total Assets		10,543.3	10,665.1
CURRENT LIABILITIES:
Vehicle floorplan payable		3,575.8	3,997.7
Accounts payable		290.3	306.2
Commercial paper		170.0	630.0
Current maturities of long-term debt		355.6	44.3
Other current liabilities		708.5	679.9
Total Current Liabilities		5,100.2	5,658.1
LONG-TERM DEBT, NET OF CURRENT MATURITIES		1,578.5	1,926.2
NONCURRENT OPERATING LEASE LIABILITIES		305.0	0.0
DEFERRED INCOME TAXES		135.1	89.8
OTHER LIABILITIES		262.4	275.0
COMMITMENTS AND CONTINGENCIES (Note 19)
SHAREHOLDERS' EQUITY:
Preferred stock, par value $0.01 per share; 5,000,000 shares authorized; none issued		0.0	0.0
Common stock, par value $0.01 per share; 1,500,000,000 shares authorized; 102,562,149 shares issued at December 31, 2019, and December 31, 2018, including shares held in treasury		1.0	1.0
Additional paid-in capital		35.9	20.8
Retained earnings		3,688.3	3,238.3
Treasury stock, at cost; 13,212,974 and 12,540,065 shares held, respectively		(563.1)	(544.1)
Total Shareholders' Equity		3,162.1	2,716.0
Total Liabilities and Shareholders' Equity		10,543.3	10,665.1
Trade [Member]
CURRENT LIABILITIES:
Vehicle floorplan payable		2,120.6	2,388.0
Non-Trade [Member]
CURRENT LIABILITIES:
Vehicle floorplan payable		$ 1,455.2	$ 1,609.7

[1] Net of accumulated impairment losses of $1.47 billion associated with our single reporting unit (prior to September 30, 2008, our reporting unit structure was comprised of a single reporting unit) and $140.0 million associated with our Domestic reporting unit, both of which were recorded during the year ended December 31, 2008.