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LONG-TERM OBLIGATIONS - 5-5/8% Senior Notes (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Apr. 03, 2017
Jan. 31, 2017
Nov. 26, 2012
Mar. 26, 2012
Nov. 13, 2007
Debt Instrument [Line Items]              
Loss on early extinguishment of debt $ 45.4 $ 0.0          
Senior Notes              
Debt Instrument [Line Items]              
Loss on early extinguishment of debt $ 37.2            
Senior Notes | 5-5/8% Notes              
Debt Instrument [Line Items]              
Interest rate (as a percent) 5.625%     5.625%      
Face amount of debt       $ 600.0      
Long-term debt $ 600.0            
Senior Notes | 6% Notes              
Debt Instrument [Line Items]              
Interest rate (as a percent) 6.00%     6.00% 6.00%    
Tender offer for face amount of debt       $ 550.0      
Repurchased face amount of debt $ 850.0     $ 300.0      
Long-term debt         $ 850.0   $ 800.0
Senior Notes | 6-1/2% Notes              
Debt Instrument [Line Items]              
Interest rate (as a percent) 6.50%            
Repurchased face amount of debt $ 45.8            
Long-term debt $ 254.2         $ 300.0  
Senior Notes | 6-1/2% Notes | Subsequent Event              
Debt Instrument [Line Items]              
Interest rate (as a percent)     6.50%        
Repurchased face amount of debt     $ 254.2