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DEBT (Debt Financing Transactions in Connection with the Spin-off) (Details)
3 Months Ended
Feb. 16, 2021
USD ($)
Jan. 29, 2021
USD ($)
Mar. 31, 2021
USD ($)
Mar. 31, 2020
USD ($)
Dec. 31, 2020
USD ($)
May 19, 2020
EUR (€)
Jan. 17, 2017
USD ($)
Line of Credit Facility              
Loss on early extinguishment of debt     $ (23,500,000) $ 0      
Line of Credit | Senior secured revolving credit facility              
Line of Credit Facility              
Maximum borrowing capacity $ 1,000,000,000.0         € 500,000,000.0 $ 2,500,000,000
Debt instrument, term 3 years            
Long-term debt, gross     200,000,000.0   $ 0    
Letter of Credit | Senior secured revolving credit facility              
Line of Credit Facility              
Maximum borrowing capacity $ 450,000,000.0            
Senior Notes | 6.50% Senior notes due 2026              
Line of Credit Facility              
Debt instrument, face amount   $ 1,000,000,000.0          
Interest rate, stated percentage   6.50%          
Long-term debt, gross     1,000,000,000.0   0    
Senior Notes | 3.45% Senior Notes due 2022              
Line of Credit Facility              
Interest rate, stated percentage   3.45%          
Long-term debt, gross   $ 500,000,000.0 0   500,000,000.0    
Loss on early extinguishment of debt   23,500,000          
Synthetic bonds due 2021              
Line of Credit Facility              
Long-term debt, gross   $ 542,400,000 0   551,200,000    
Commercial paper              
Line of Credit Facility              
Long-term debt, gross     21,200,000   $ 1,043,700,000    
Commercial paper | U.S. dollar              
Line of Credit Facility              
Maximum borrowing capacity     $ 830,900,000