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DEBT - Missed Interest Payments and Forbearance (Details) - USD ($)
$ in Millions
Jun. 15, 2020
May 15, 2020
May 29, 2020
Debt instrument      
Grace period 30 days 30 days  
Senior Notes (Unsecured) | 6% Senior Notes due 2024      
Debt instrument      
Interest not paid   $ 4  
Shared First Priority Lien      
Debt instrument      
Interest not paid     $ 51
Second Lien Notes      
Debt instrument      
Interest not paid $ 72