XML 41 R23.htm IDEA: XBRL DOCUMENT v2.4.0.6
Fair Value Measurements (Tables)
3 Months Ended
Mar. 31, 2012
Fair Value Measurements [Abstract]  
Fair value of senior notes
                                 
    March 31, 2012     December 31, 2011  
    Fair Value     Carrying
Value
    Fair Value     Carrying
Value
 
         

7-1/8% senior notes due 2017

  $ 257.5     $ 250.0     $ 254.8     $ 250.0  

8-7/8% senior notes due 2020

  $ 243.6     $ 221.9     $ 239.6     $ 221.9  

7-7/8% senior notes due 2022

  $ 255.0     $ 247.9     $ 252.8     $ 247.9  
Fair value of plan assets
                                 
    Fair Value Measurements at  
    Total     Quoted Prices in
Active markets for
Identical Assets
(Level  1)
    Significant Other
Observable Inputs
(Level 2)
    Significant
Unobservable
Inputs
(Level 3)
 

March 31, 2012

                               

Oil Floors

  $ 0.8     $ —       $ 0.8     $ —    
         

December 31, 2011

                               

Oil Floors

  $ 0.1     $ —       $ 0.1     $ —