Benefit Plans (Accumulated benefit obligation exceeding the fair value of plan assets) (Details) - Other Defined Benefit Pension Plans [Member] - USD ($) $ in Millions	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2024
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 112.8	$ 109.3	$ 113.9
Defined Benefit Plan, Accumulated Benefit Obligation	93.1	90.7
defined benefit plans, aggregate projected benefit obligation	$ 93.1	$ 90.7

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.

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+ Details

- 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.

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