Quarterly report pursuant to Section 13 or 15(d)

LONG-TERM DEBT - Senior Secured Notes Narrative (Details)

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LONG-TERM DEBT - Senior Secured Notes Narrative (Details) - Senior Secured Notes - USD ($)
$ in Millions
3 Months Ended
Feb. 12, 2021
Mar. 31, 2021
Feb. 02, 2021
Feb. 02, 2018
Line of Credit Facility [Line Items]        
Percentage of prepayment Premium     0.90%  
Senior Secured Notes Due 2028        
Line of Credit Facility [Line Items]        
Aggregate principal amount $ 310      
Interest rate 8.25%      
Borrowed funds designated for contructing project $ 180      
Proceeds form the offering $ 8      
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed 35.00%      
Percentage of redemption of equity offering 108.25%      
Debt Instrument, Redemption Price, Percentage   100.00%    
Senior Secured Notes Due 2024        
Line of Credit Facility [Line Items]        
Aggregate principal amount       $ 100