RETIREMENT-RELATED BENEFITS - Nonpension Postretirement Benefits Plans and Multi-Employer Plans (Details) - USD ($) $ in Millions |
12 Months Ended | ||
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Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
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| RETIREMENT-RELATED BENEFITS | |||
| Cost of defined contribution expense | $ 137.0 | $ 131.0 | $ 140.0 |
| Retirement and nonpension postretirement benefit obligations | 490.0 | 483.0 | |
| Non Pension Postretirement Benefit Plans | |||
| RETIREMENT-RELATED BENEFITS | |||
| Retirement and nonpension postretirement benefit obligations | $ 8.0 | $ 9.0 | |
| Discount rate | 3.97% | 3.16% | 2.89% |
| Fair Value of plan assets | $ 0.0 | $ 0.0 | $ 0.0 |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of cost for defined contribution plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as noncurrent. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Details
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