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Pension and Other Benefit Plans - Narrative (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Sep. 30, 2021 | Mar. 31, 2021
Defined Benefit Plan Disclosure [Line Items] |  |
Deferred compensation plan, liability | $ 40 | $ 42
Directors |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Maximum deferral percentage | 100.00% |

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- Definition The maximum amount of compensation that a plan participant is allowed to defer of their eligible compensation. + References No definition available. + Details
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- Definition The carrying amount of the liability as of the balance sheet date to an individual under a deferred compensation arrangement. This amount may be the result of periodic accruals made over the period of active employment, or reflect termination benefits resulting contractual terms or a death benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 30 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6409875&loc=d3e20015-108363 + Details
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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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- Details
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