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Pension and Employee Benefit Plans, Weighted-average Asset Allocations (Details) - U.S. Pension Plans | 12 Months Ended
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Mar. 31, 2026 | Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2023
Weighted Average Asset Allocations [Abstract] |  |  |  |
Target allocation |  | 100.00% |  |
Plan assets |  | 100.00% | 100.00% |
Debt securities |  |  |  |
Weighted Average Asset Allocations [Abstract] |  |  |  |
Target allocation |  | 80.00% |  |
Plan assets |  | 97.00% | 72.00% |
Cash and cash equivalents |  |  |  |
Weighted Average Asset Allocations [Abstract] |  |  |  |
Target allocation |  | 1.00% |  |
Plan assets |  | 3.00% | 5.00% |
Equity securities |  |  |  |
Weighted Average Asset Allocations [Abstract] |  |  |  |
Target allocation |  | 19.00% |  |
Plan assets |  |  | 18.00% |
Real estate investments |  |  |  |
Weighted Average Asset Allocations [Abstract] |  |  |  |
Target allocation |  | 0.00% |  |
Plan assets |  |  | 5.00% |
U.S. Plans |  |  |  |
Weighted Average Asset Allocations [Abstract] |  |  |  |
Expected return on plan assets |  | 5.50% | 6.50% | 7.00%
U.S. Plans | Forecast |  |  |  |
Weighted Average Asset Allocations [Abstract] |  |  |  |
Expected return on plan assets | 5.50% |  |  |

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- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-8 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Percentage of target 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/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -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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- 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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