Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Details)

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Fair Value Measurements (Details) (USD $)
In Millions, unless otherwise specified
Jul. 09, 2010
$150 senior unsecured notes
Jun. 30, 2013
Carrying Value
Jun. 30, 2013
Level 1
Jun. 30, 2013
Level 2
Jun. 30, 2013
Level 3
Assets:          
Cash and cash equivalents   $ 41.1 $ 41.1    
Equity investments   1.0     1.0
Investments in rabbi trust   5.3 5.3    
Derivative instruments   0.7   0.7  
Liabilities:          
$150 senior unsecured notes   148.8 161.4    
Revolving credit facility   370.0   370.0  
Term loan   192.5   192.5  
Derivative instruments   1.6   1.6  
Long-term debt, principal $ 150.0