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Financial Instruments and Fair Value Measurements (Tables)
 12 Months Ended
Dec. 31, 2012
Fair Value Disclosures [Abstract]  
Summary Of Carrying Values And Fair Values Of Fixed Rate Debt
A summary of the aggregate carrying values and fair values of our fixed rate debt is as follows:
 
December 31, 2012
 
December 31, 2011
Carrying value
$
1,056.1

 
$
652.0

Fair value
$
1,138.0

 
$
675.6
Nonfinancial Assets Measured and Recorded At Fair Value On A Nonrecurring Basis
The following table presents nonfinancial assets measured and recorded at fair value on a nonrecurring basis during the years ended December 31, 2012 and 2011:
 
 
2012
 
2011
Description
 
Fair Value
Measurements Using
Significant
Unobservable Inputs
(Level 3)
 
Gain/(Loss)
 
Fair Value
Measurements Using
Significant
Unobservable Inputs
(Level 3)
 
Gain/(Loss)
Franchise rights
 
$
—

 
$
(4.2
)
 
$
—

 
$
—

 
 
 
 
 
 
 
 
 
Long-lived assets held and used
 
$
—

 
$
(0.8
)
 
$
15.8

 
$
(1.1
)
Long-lived assets held for sale:
 
 
 
 
 
 
 
 
Continuing operations
 
$
—

 
$
—

 
$
13.9

 
$
(1.1
)
Discontinued operations
 
3.7

 
(0.1
)
 
10.9

 
(0.5
)
Total long-lived assets held for sale
 
$
3.7

 
$
(0.1
)
 
$
24.8

 
$
(1.6
)