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TRANSACTIONS WITH FORMER PARENT - Related Party Revenue and Purchases (Details) - USD ($)
$ in Millions
3 Months Ended 4 Months Ended 9 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2021
Aug. 11, 2022
May 19, 2022
Related Party Transaction [Line Items]              
Revenues   $ 260   $ 287 $ 550    
Related-party cost of services   1,100   1,382 2,973    
Payment for purchase of hardware from IBM       711 572    
IBM              
Related Party Transaction [Line Items]              
Ownership interest transferred           19.90% 19.90%
Revenues $ 0 260 $ 0 287 550    
Related-party cost of services 0            
IBM | Hardware, software and services              
Related Party Transaction [Line Items]              
Payment for purchase of hardware from IBM       89 212    
Due from related party 265   265 $ 265      
Upgraded hardware period       2 years      
Purchases from related party $ 21     $ 41      
Estimated useful lives (in years) 5 years            
IBM | Cost of service              
Related Party Transaction [Line Items]              
Related-party cost of services   1,100 $ 0 $ 1,400 $ 3,000    
IBM | Cost of service | Pre-Separation Costs              
Related Party Transaction [Line Items]              
Related-party cost of services   386          
IBM | Cost of service | Post-Separation Costs              
Related Party Transaction [Line Items]              
Related-party cost of services   $ 714