Benefit Plans (Amounts recognized in balance sheets) (Details) - USD ($) $ in Millions |
Mar. 31, 2026 |
Mar. 31, 2025 |
|---|---|---|
| Other Postretirement Benefit Plans, Defined Benefit | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Liability, Defined Benefit Plan, Current | $ (0.9) | $ (1.0) |
| Liability, Defined Benefit Plan, Noncurrent | (4.3) | (4.8) |
| Liability, Defined Benefit Pension Plan | 5.2 | 5.8 |
| Assets for Plan Benefits, Defined Benefit Plan | 0.0 | 0.0 |
| Other Defined Benefit Pension Plans [Member] | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Liability, Defined Benefit Plan, Current | 0.0 | 0.0 |
| Liability, Defined Benefit Plan, Noncurrent | (4.1) | (3.3) |
| Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position | 19.7 | |
| Liability, Defined Benefit Pension Plan | 18.6 | |
| Assets for Plan Benefits, Defined Benefit Plan | $ 23.8 | $ 21.9 |
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- Definition Amount of liability, recognized in statement of financial position, for defined benefit pension plan. Excludes other postretirement benefit plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of asset (liability), recognized in statement of financial position, for defined benefit pension and other postretirement plans. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of asset, recognized in statement of financial position, for overfunded defined benefit pension and other postretirement plans. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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. 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 current. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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://www.xbrl.org/2009/role/commonPracticeRef
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