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LONG-TERM OBLIGATIONS (Schedule of Line of Credit Facilities) (Details)
$ in Millions
12 Months Ended
Feb. 14, 2019
Dec. 31, 2019
USD ($)
renewal_period
Dec. 31, 2018
USD ($)
Line of Credit Facility [Line Items]      
Annual renewal periods, number | renewal_period   2  
2019 Multicurrency Credit Facility | Revolving Credit Facility      
Line of Credit Facility [Line Items]      
Long-term debt   $ 700.0 $ 1,875.0
Letters of credit, amount outstanding   $ 3.8  
Line of credit facility, commitment fee percentage   0.11%  
2019 Credit Facility | Revolving Credit Facility      
Line of Credit Facility [Line Items]      
Long-term debt   $ 1,600.0 0.0
Letters of credit, amount outstanding   $ 6.1  
Line of credit facility, commitment fee percentage   0.11%  
Term Loan 2019 | Unsecured Debt      
Line of Credit Facility [Line Items]      
Long-term debt   $ 995.2 994.8
Outstanding principal amount   1,000.0  
2019 364-Day Term Loan | Unsecured Debt      
Line of Credit Facility [Line Items]      
Debt instrument, term 364 days    
Long-term debt   999.9 $ 0.0
Outstanding principal amount   $ 1,000.0  
LIBOR | 2019 Multicurrency Credit Facility | Revolving Credit Facility      
Line of Credit Facility [Line Items]      
Basis spread on variable rate   1.125%  
LIBOR | 2019 Credit Facility | Revolving Credit Facility      
Line of Credit Facility [Line Items]      
Basis spread on variable rate   1.125%  
LIBOR | Term Loan 2019 | Unsecured Debt      
Line of Credit Facility [Line Items]      
Basis spread on variable rate   1.125%  
LIBOR | 2019 364-Day Term Loan | Unsecured Debt      
Line of Credit Facility [Line Items]      
Basis spread on variable rate   0.80%