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WORKFORCE REBALANCING AND SITE-RATIONALIZATION CHARGES - Classification of restructuring activity (Details) - USD ($)
$ in Millions
3 Months Ended 15 Months Ended
Jun. 30, 2023
Jun. 30, 2023
RESTRUCTURING    
Charges $ 68 $ 203
Cost of services    
RESTRUCTURING    
Charges 1  
Selling, general and administrative expense.    
RESTRUCTURING    
Charges 10  
Workforce rebalancing charges (benefits)    
RESTRUCTURING    
Charges $ 58