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LONG-TERM OBLIGATIONS - Additional Information (Details)
€ in Millions, $ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Feb. 28, 2018
Aug. 17, 2017
Apr. 03, 2017
USD ($)
Mar. 31, 2017
USD ($)
Sep. 30, 2017
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Apr. 10, 2018
USD ($)
Mar. 31, 2018
USD ($)
Jan. 31, 2017
USD ($)
May 28, 2015
USD ($)
Aug. 13, 2014
USD ($)
Aug. 13, 2014
EUR (€)
Nov. 26, 2012
USD ($)
Mar. 27, 2012
Mar. 26, 2012
USD ($)
Nov. 13, 2007
USD ($)
Debt Instrument [Line Items]                                    
Gain (loss) on extinguishment of debt           $ (0.7) $ (52.6) $ (0.4)                    
Net debt           1,216.7                        
Repayments of debt           1,150.1 1,594.1 1,286.3                    
Interest paid           57.5 59.5 96.2                    
Credit Agreement 2017                                    
Debt Instrument [Line Items]                                    
Gain (loss) on extinguishment of debt           (0.7) (0.7)                      
Letters of credit outstanding           0.0                        
Debt instrument collateral percentage of material subsidiaries capital stock                     65.00%              
Revolving Credit Facility                                    
Debt Instrument [Line Items]                                    
Net debt           $ 237.0 0.0                      
Weighted average interest rate           5.98%                        
Credit Agreement 2014                                    
Debt Instrument [Line Items]                                    
Revolving line of credit available borrowing capacity                         $ 600.0          
Gain (loss) on extinguishment of debt             (8.2)                      
6-1/2% Senior Notes                                    
Debt Instrument [Line Items]                                    
Interest rate of debt securities (as a percent)                               6.50%    
Securitization 2015                                    
Debt Instrument [Line Items]                                    
Revolving line of credit available borrowing capacity                       $ 350.0            
Write off of deferred debt issuance cost               0.4                    
Commitment Letter                                    
Debt Instrument [Line Items]                                    
Professional fees               $ 7.2                    
Credit Agreement | Credit Agreement 2017                                    
Debt Instrument [Line Items]                                    
Incremental borrowing capacity                     $ 300.0              
Net debt           $ 386.4 389.0                      
Credit Agreement | Credit Agreement 2017 | Revolving Credit Facility                                    
Debt Instrument [Line Items]                                    
Revolving line of credit available borrowing capacity                 $ 600.0 $ 450.0                
Springing covenant threshold                     30.00%              
Minimum interest coverage ratio           2.5                        
Senior secured debt leverage ratio maximum           2.75                        
Credit Agreement | Credit Agreement 2017 | Secured Debt                                    
Debt Instrument [Line Items]                                    
Long-term line of credit                     $ 400.0              
Interest rate increase (decrease) (0.025%) (0.025%)                                
Net debt           $ 391.4 $ 395.1                      
Weighted average interest rate           4.50% 3.94%                      
Credit Agreement | Credit Agreement 2017 | Letter of Credit                                    
Debt Instrument [Line Items]                                    
Letters of Credit Maximum Available under Credit Facility                     400.0              
Letters of credit outstanding           $ 75.8 $ 57.4                      
Credit Agreement | Credit Agreement 2014 | Secured Debt                                    
Debt Instrument [Line Items]                                    
Long-term line of credit                         $ 230.0 € 200.0        
Credit Agreement | Additional Credit Agreement 2017 | Letter of Credit                                    
Debt Instrument [Line Items]                                    
Letters of credit outstanding           33.4 34.3                      
Letters of credit maximum available under additional facilities                     300.0              
Credit Agreement | Bilateral Arrangements 2017 Credit Agreement | Letter of Credit                                    
Debt Instrument [Line Items]                                    
Letters of credit outstanding           42.4 23.1                      
Senior Notes                                    
Debt Instrument [Line Items]                                    
Gain (loss) on extinguishment of debt             (43.7)                      
Senior Notes | 6-1/2% Senior Notes                                    
Debt Instrument [Line Items]                                    
Net debt                                 $ 300.0  
Redemption price, percentage of principal amount redeemed         103.25%                          
Repurchased face amount     $ 254.2 $ 45.8                            
Repayments of debt     266.7 47.9                            
Repurchase premium       1.2                            
Interest payable     8.4 0.9                            
Call premium     $ 4.1                              
Senior Notes | 6% Senior Notes due May 15, 2021                                    
Debt Instrument [Line Items]                                    
Net debt                             $ 850.0     $ 800.0
Interest rate of debt securities (as a percent)                             6.00%      
Repayments of debt       887.2                            
Repurchase premium       25.9                            
Interest payable       $ 11.3                            
Authorized repurchase amount                     $ 550.0              
Senior Notes | 8% Senior Subordinated Notes due November 15, 2017                                    
Debt Instrument [Line Items]                                    
Interest rate of debt securities (as a percent)                                   8.00%
Senior Notes | 5-5/8% Senior Notes due February 1, 2025                                    
Debt Instrument [Line Items]                                    
Net debt           $ 591.1 $ 589.6                      
Interest rate of debt securities (as a percent)           5.625%         5.625%              
Debt instrument, face amount                     $ 600.0              
Senior Notes | Senior Notes, 6%, $300 Million Partial Redemption                                    
Debt Instrument [Line Items]                                    
Authorized repurchase amount                     $ 300.0              
London Interbank Offered Rate (LIBOR) [Member] | Credit Agreement | Credit Agreement 2017 | Secured Debt                                    
Debt Instrument [Line Items]                                    
Debt Instrument, Basis Spread on Variable Rate 2.00%                                  
Debt Instrument, Floor Interest Rate 0.75%