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DEBT (Details)
1 Months Ended 3 Months Ended 6 Months Ended
Jul. 31, 2019
USD ($)
Feb. 28, 2019
EUR (€)
Jun. 30, 2015
USD ($)
Jun. 30, 2019
USD ($)
Mar. 31, 2019
USD ($)
Jun. 30, 2019
USD ($)
Jun. 30, 2019
EUR (€)
Aug. 31, 2016
USD ($)
Mar. 31, 2013
USD ($)
2015 Facility                  
Debt Instrument [Line Items]                  
Debt term     5 years            
Line of credit facility     $ 400,000,000.0            
Write off debt issuance costs         $ 2,000,000.0        
2013 Notes                  
Debt Instrument [Line Items]                  
Increase in interest rate for every one-notch downgrade of long-term credit ratings below investment grade           0.25%      
Maximum aggregate increase in interest rate related to downgrade of long-term credit ratings below investment grade           2.00%      
Four Point Six Zero Percent Notes, Due February Two Thousand Twenty Two | 2019 Facility                  
Debt Instrument [Line Items]                  
Debt term   3 years              
Line of credit facility   € 200,000,000.0   $ 227,000,000.0   $ 227,000,000.0      
Interest rate   4.60%              
Issuance costs       $ 8,000,000 $ 10,000,000.0        
Remaining borrowing capacity | €             € 178,000,000.0    
Four Point Six Zero Percent Notes, Due March Two Thousand Twenty                  
Debt Instrument [Line Items]                  
Interest rate       4.60%   4.60% 4.60%   4.60%
Principal amount       $ 386,900,000   $ 386,900,000     $ 500,000,000.0
Five Point Zero Percent Notes, Due March Two Thousand Twenty-Three                  
Debt Instrument [Line Items]                  
Interest rate                 5.00%
Principal amount                 $ 500,000,000.0
Six Point Nine Five Percent Notes, Due March Two Thousand Forty-Three                  
Debt Instrument [Line Items]                  
Interest rate                 6.95%
Principal amount                 $ 250,000,000.0
Seven Point Eight Seven Five Percent Notes, Due August Two Thousand Twenty Two                  
Debt Instrument [Line Items]                  
Interest rate               7.875%  
Principal amount               $ 500,000,000.0  
AIO                  
Debt Instrument [Line Items]                  
Standby letters of credit, recorded liability       $ 25,000,000.0   $ 25,000,000.0      
Subsequent Event | 2019 Notes                  
Debt Instrument [Line Items]                  
Principal amount $ 400,000,000.0                
Subsequent Event | Four Point Six Zero Percent Notes, Due March Two Thousand Twenty                  
Debt Instrument [Line Items]                  
Interest rate 4.60%                
Repayments of debt $ 275,000,000