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.

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Amount of contribution expected to be received by defined benefit plan from employer in next fiscal year following current fiscal year.

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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.

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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.

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Pension and Employee Benefit Plans, Weighted-average Asset Allocations (Details) - Pension Plans [Member] - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Weighted Average Asset Allocations [Abstract]
Target allocation		100.00%	100.00%
Plan assets		100.00%	100.00%
Employer contributions expected to be contributed during fiscal 2022		$ 13.0
Equity Securities [Member]
Weighted Average Asset Allocations [Abstract]
Target allocation		76.00%	65.00%
Plan assets		73.00%	60.00%
Debt Securities [Member]
Weighted Average Asset Allocations [Abstract]
Target allocation		18.00%	21.00%
Plan assets		17.00%	22.00%
Real Estate Investments [Member]
Weighted Average Asset Allocations [Abstract]
Target allocation		5.00%	13.00%
Plan assets		9.00%	16.00%
Cash and Cash Equivalents [Member]
Weighted Average Asset Allocations [Abstract]
Target allocation		1.00%	1.00%
Plan assets		1.00%	2.00%
U.S. Plans [Member]
Weighted Average Asset Allocations [Abstract]
Expected return on plan assets		7.50%	7.50%	7.50%
U.S. Plans [Member] \| Forecast [Member]
Weighted Average Asset Allocations [Abstract]
Expected return on plan assets	7.50%