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Pension and Other Benefit Plans - Asset Allocations (Details) | Mar. 31, 2025 | Mar. 31, 2024
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Defined Benefit Plan Disclosure [Line Items] |  |
Total | 100.00% | 100.00%
Equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total | 10.00% | 9.00%
Debt securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total | 52.00% | 55.00%
Alternatives |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total | 35.00% | 29.00%
Cash and other |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total | 3.00% | 7.00%

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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. + References No definition available. + Details
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- Definition Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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