Consolidated Balance Sheets - USD ($) $ in Millions		Dec. 31, 2015	Dec. 31, 2014
CURRENT ASSETS:
Cash and cash equivalents		$ 74.1	$ 75.4
Receivables, net		908.2	817.8
Inventory		3,612.0	2,899.0
Other current assets		117.1	207.0
Total Current Assets		4,711.4	3,999.2
PROPERTY AND EQUIPMENT, NET		2,667.4	2,422.0
GOODWILL, NET	[1]	1,394.5	1,314.7
OTHER INTANGIBLE ASSETS, NET		439.9	354.7
OTHER ASSETS		345.1	309.1
Total Assets		9,558.3	8,399.7
CURRENT LIABILITIES:
Vehicle floorplan payable		3,727.1	3,097.2
Accounts payable		299.9	264.7
Commercial paper		599.5	0.0
Current maturities of long-term debt		13.4	25.0
Other current liabilities		529.2	495.1
Total Current Liabilities		5,169.1	3,882.0
LONG-TERM DEBT, NET OF CURRENT MATURITIES		1,753.7	2,103.4
DEFERRED INCOME TAXES		78.6	137.9
OTHER LIABILITIES		$ 207.6	$ 204.3
COMMITMENTS AND CONTINGENCIES (Note 8)
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; 120,562,149 shares issued at December 31, 2015, and 163,562,149 shares issued at December 31, 2014, including shares held in treasury		1.2	1.6
Additional paid-in capital		5.2	61.8
Retained earnings		2,702.8	3,756.6
Treasury stock, at cost; 9,758,091 and 50,248,909 shares held, respectively		(359.9)	(1,747.9)
Total Shareholders' Equity		2,349.3	2,072.1
Total Liabilities and Shareholders' Equity		9,558.3	8,399.7
Trade [Member]
CURRENT LIABILITIES:
Vehicle floorplan payable		2,565.8	2,090.7
Non-Trade [Member]
CURRENT LIABILITIES:
Vehicle floorplan payable		$ 1,161.3	$ 1,006.5

[1] Net of accumulated impairment losses of $1.47 billion ($1.25 billion after-tax) 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 ($119.0 million after-tax) associated with our Domestic reporting unit, both of which were recorded during the year ended December 31, 2008.