v3.26.1
RETIREMENT-RELATED BENEFITS - Contributions and Direct Benefit Payments (Details) - USD ($)
$ in Millions
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Defined benefit plans      
Retirement-Related Benefits      
Total $ 12 $ 17 $ 14
Direct payments      
Retirement-Related Benefits      
Total 49 $ 44 $ 46
Pension Plans      
Retirement-Related Benefits      
Estimated cash contributions to the defined benefit plans in next fiscal year $ 13