v3.26.1
SEGMENTS - Results of segments (Details) - USD ($)
$ in Millions
 3 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Segment Information    
Revenues $ 3,618 $ 3,743
Cost of service, excluding depreciation and amortization 2,334 2,454
Selling, general and administrative expenses, excluding depreciation and amortization 602 583
Other items 140 34
Segment adjusted EBITDA $ 542 672
Other items, description Other items include workforce rebalancing charges and other expense (income)  
United States    
Segment Information    
Revenues $ 954 911
Cost of service, excluding depreciation and amortization 569 570
Selling, general and administrative expenses, excluding depreciation and amortization 148 137
Other items 17 7
Segment adjusted EBITDA 220 196
Japan    
Segment Information    
Revenues 534 578
Cost of service, excluding depreciation and amortization 332 371
Selling, general and administrative expenses, excluding depreciation and amortization 84 85
Other items 8 7
Segment adjusted EBITDA 109 115
Principal Markets    
Segment Information    
Revenues 1,262 1,356
Cost of service, excluding depreciation and amortization 853 928
Selling, general and administrative expenses, excluding depreciation and amortization 217 218
Other items 41 12
Segment adjusted EBITDA 151 197
Strategic Markets    
Segment Information    
Revenues 868 898
Cost of service, excluding depreciation and amortization 580 585
Selling, general and administrative expenses, excluding depreciation and amortization 153 143
Other items 74 7
Segment adjusted EBITDA $ 62 $ 163