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Fair Value Measurements (Tables)
12 Months Ended
Dec. 31, 2017
Carrying Value and Fair Value of Debt

The carrying value and fair value of debt as of December 31, 2017 and 2016 were as follows:

 

     
(In millions)    December 31, 2017      December 31, 2016  
         
      Carrying
Value
     Fair
Value
     Carrying
Value
     Fair
Value
 

Revolving credit facility

   $ 615.0      $ 615.0      $ 540.0      $ 540.0  

Senior Notes, net of underwriting commissions and price discounts

     892.6        926.3        891.1        919.2  
Assets and Liabilities Measured at Fair Value on Recurring Basis

Assets and liabilities measured at fair value on a recurring basis as of December 31, 2017 and 2016 were as follows:

 

   
(In millions)    Fair Value  
 
      2017      2016  

Assets:

       

Derivative asset financial instruments (level 2)

   $ 1.0      $ 3.4  

Deferred compensation program assets (level 2)

     7.5        4.5  

Total assets

   $ 8.5      $ 7.9  

Liabilities:

       

Derivative liability financial instruments (level 2)

   $ 6.4      $ 3.1