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Equipment (Details) - Equipment - USD ($)
$ in Millions
2 Months Ended 10 Months Ended 12 Months Ended
Feb. 22, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2023
Dec. 31, 2021
Feb. 23, 2022
Property, Plant and Equipment [Line Items]            
Opening balance $ 39 $ 9 $ 9 $ 13    
Additions     4 3    
Aquadrill acquisition       1    
Closing balance 9 13 13 17 $ 39  
Opening balance (28) 0 0 (3)    
Depreciation     (3) (4)    
Closing balance 0 (3) (3) (7) (28)  
Net book value 9 10 $ 10 $ 10 $ 11 $ 9
Predecessor            
Property, Plant and Equipment [Line Items]            
Opening balance   39        
Closing balance 39          
Opening balance   (28)        
Closing balance (28)          
Net book value 11          
Fresh Start Adjustments            
Property, Plant and Equipment [Line Items]            
Opening balance   (30)        
Closing balance (30)          
Opening balance   $ 28        
Closing balance 28          
Net book value $ (2)