Receivables, Net (Tables)
9 Months Ended
Sep. 30, 2011
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract] 
Components Of Receivables, Net Of Allowance For Doubtful Accounts
 
September 30, 2011
 
December 31, 2010
Trade receivables
$
91.0

 
$
89.8

Manufacturer receivables
107.3

 
127.8

Other
34.7

 
37.5

 
233.0

 
255.1

Less: Allowances
(2.7
)
 
(3.7
)
 
230.3

 
251.4

Contracts-in-transit and vehicle receivables
171.8

 
210.6

Receivables, net
$
402.1

 
$
462.0