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LONG-TERM DEBT (Details)
1 Months Ended 12 Months Ended 24 Months Ended
Aug. 31, 2016
EUR (€)
Sep. 30, 2014
CAD ($)
Aug. 31, 2015
GBP (£)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
May 31, 2017
USD ($)
May 31, 2016
USD ($)
Jun. 30, 2015
USD ($)
Debt Instrument [Line Items]                  
Repayments debt       $ 96,000,000 $ 39,000,000 $ 263,000,000      
August 2016 Credit Agreement [Member] | Revolving credit facility [Member]                  
Debt Instrument [Line Items]                  
Maximum borrowing capacity | € € 20,000,000                
Senior notes [Member]                  
Debt Instrument [Line Items]                  
Debt issuance costs and discounts             $ 24,000,000    
Senior notes [Member] | Debt redemption, period one [Member]                  
Debt Instrument [Line Items]                  
Debt redemption percentage             101.00%    
Senior notes [Member] | Debt redemption, period two [Member]                  
Debt Instrument [Line Items]                  
Debt redemption percentage             100.00%    
Senior notes [Member] | Unsecured Senior Notes, 4.20% [Member]                  
Debt Instrument [Line Items]                  
Face amount of debt             $ 400,000,000    
Stated interest rate       4.20%     4.20%    
Long-term Debt, Fair Value       $ 383,000,000 411,000,000        
Senior notes [Member] | Unsecured Senior Notes, 3.75% [Member]                  
Debt Instrument [Line Items]                  
Face amount of debt               $ 400,000,000  
Stated interest rate       3.75%       3.75%  
Long-term Debt, Fair Value       $ 357,000,000 384,000,000        
Senior notes [Member] | Unsecured Senior Notes, 4.60% [Member]                  
Debt Instrument [Line Items]                  
Face amount of debt                 $ 1,000,000,000
Stated interest rate       4.60%         4.60%
Long-term Debt, Fair Value       $ 1,026,000,000 $ 1,089,000,000        
Line of credit [Member] | Revolving credit facility [Member]                  
Debt Instrument [Line Items]                  
Maximum borrowing capacity | £     £ 20,000,000            
Term loan [Member] | British pound term loan [Member]                  
Debt Instrument [Line Items]                  
Face amount of debt | £     £ 160,000,000            
Debt, term     5 years            
Semi annual payments | £     £ 4,000,000            
Weighted average interest rate       1.34% 1.04%        
Term loan [Member] | August 2016 Credit Agreement [Member]                  
Debt Instrument [Line Items]                  
Face amount of debt | € € 110,000,000                
Debt, term 5 years                
Effective interest rate       0.45% 0.45%        
Revolving credit facility [Member]                  
Debt Instrument [Line Items]                  
Maximum borrowing capacity   $ 175,000,000              
Weighted average interest rate       2.50%          
Euro term loan [Member]                  
Debt Instrument [Line Items]                  
Long-term Debt, Fair Value       $ 126,000,000 $ 132,000,000        
Repayments debt | € € 102,500,000                
London Interbank Offered Rate (LIBOR) [Member] | Term loan [Member] | British pound term loan [Member]                  
Debt Instrument [Line Items]                  
Basis points     0.75%            
Euro Interbank Offered Rate (EURIBOR) [Member] | Term loan [Member] | August 2016 Credit Agreement [Member]                  
Debt Instrument [Line Items]                  
Basis points 0.45%                
Canadian Dollar Offered Rate (CDOR) [Member] | Revolving credit facility [Member]                  
Debt Instrument [Line Items]                  
Basis points   0.80%              
Minimum [Member] | Senior notes [Member]                  
Debt Instrument [Line Items]                  
Basis points             20.00%    
Maximum [Member] | Senior notes [Member]                  
Debt Instrument [Line Items]                  
Basis points             25.00%