Annual report pursuant to Section 13 and 15(d)

LONG-TERM DEBT (Debt Extinguishment) (Details)

v3.20.4
LONG-TERM DEBT (Debt Extinguishment) (Details) - USD ($)
 1 Months Ended
Oct. 31, 2019
Mar. 31, 2018
Dec. 31, 2020
Dec. 31, 2019
Mar. 31, 2019
Debt Instrument [Line Items]          
Cash available for general corporate purposes $ 527,500,000 $ 492,500,000      
Loss on extinguishment of debt 4,500,000 2,500,000      
4.75% Senior Notes Due 2027 [Member]          
Debt Instrument [Line Items]          
Face amount $ 950,000,000        
Interest rate, stated percentage 4.75%   4.75%    
Senior Secured Credit Facility Term loan B [Member]          
Debt Instrument [Line Items]          
Face amount $ 950,000,000   $ 950,000,000    
5.375% Senior Notes due 2022 [Member]          
Debt Instrument [Line Items]          
Interest rate, stated percentage 5.375%        
Repayment of debt $ 250,000,000        
Redemption Premium Payment, Extinguishment of Debt 3,400,000        
Payment of Accrued Interest and Fees 30,800,000        
5.625% Senior Notes Due 2026 [Member]          
Debt Instrument [Line Items]          
Face amount     $ 300,000,000   $ 300,000,000
Interest rate, stated percentage     5.625%   5.625%
2.5% Convertible Senior Notes Due 2023 [Member]          
Debt Instrument [Line Items]          
Face amount         $ 550,000,000
Interest rate, stated percentage         2.50%
5.625% Senior Notes Due 2026 & 2.5% Convertible Senior Notes Due 2023 [Member]          
Debt Instrument [Line Items]          
Proceeds from Issuance of Debt   850,000,000.0      
2.5% Convertible Senior Notes Due 2019 [Member]          
Debt Instrument [Line Items]          
Interest rate, stated percentage       2.50% 2.50%
Repayment of debt   246,300,000      
Redemption Premium Payment, Extinguishment of Debt   90,400,000      
Payment of Accrued Interest and Fees   $ 20,800,000      
Senior Secured Credit Facility Term Loan A and B          
Debt Instrument [Line Items]          
Repayment of debt $ 1,100,000,000