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Fresh Start Accounting - Successor’s Equity (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Feb. 09, 2021
Dec. 31, 2020
Reorganization, Chapter 11 [Line Items]        
Enterprise Value     $ 4,851  
Plus: Cash and cash equivalents $ 130 $ 905 40 $ 279
Less: Fair value of debt (3,000)   (1,313)  
Successor equity value $ 9,124 $ 5,671 3,586  
Restricted cash     86  
Reorganization, Chapter 11, Fresh-Start Adjustment        
Reorganization, Chapter 11 [Line Items]        
Plus: Cash and cash equivalents     48  
Less: Fair value of debt     (52)  
Successor equity value     210  
Restricted cash     $ 8