v3.25.2
Charges and Credits - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2025
Jun. 30, 2024
Charges And Credits [Line Items]              
Severance charges   $ 66 $ 158 $ 111      
Merger & integration   35   16   $ 84 $ 27
Other restructuring charges   69          
Proceeds from sale of Palliser APS project   338          
Gain of equity method investments   149       149  
Scenario Forecast              
Charges And Credits [Line Items]              
Proceeds from sale of Palliser APS project $ 22            
Product              
Charges And Credits [Line Items]              
Cost of services and sales   2,707   2,739   $ 5,335 $ 5,331
Aker Solutions | Subsea Business              
Charges And Credits [Line Items]              
Business acquisition pre tax charges   $ 35 $ 49        
Aker Solutions | Subsea Business | Product              
Charges And Credits [Line Items]              
Cost of services and sales         $ 14    
Aker Solutions | Subsea Business              
Charges And Credits [Line Items]              
Business acquisition pre tax charges         25    
Amortization of purchase accounting adjustments related to acquired inventories       15 14    
Other merger and integration-related costs       16 11    
Merger & integration       16 $ 11    
Acquisition-related transaction costs       31      
Aker Solutions | Subsea Business | Product              
Charges And Credits [Line Items]              
Cost of services and sales       $ 15