RETIREMENT-RELATED BENEFITS - Investment Strategy (Details) |
12 Months Ended |
|---|---|
Mar. 31, 2026 | |
| Maximum | |
| Investment Policies And Strategies | |
| Percentage of board members, elected by employees and retirees for managing investments (as a percent) | 50.00% |
| Equity securities | |
| Investment Policies And Strategies | |
| Target allocation (as a percent) | 29.00% |
| Fixed-income securities | |
| Investment Policies And Strategies | |
| Target allocation (as a percent) | 45.00% |
| Real Estate. | |
| Investment Policies And Strategies | |
| Target allocation (as a percent) | 6.00% |
| Insurance contracts | |
| Investment Policies And Strategies | |
| Target allocation (as a percent) | 14.00% |
| Other investments | |
| Investment Policies And Strategies | |
| Target allocation (as a percent) | 6.00% |