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The period of time cash flow return on invested capital is averaged as a performance metric for cash awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The period of time growth in consolidated net earnings before interest, taxes, depreciation, amortization, and certain other adjustments (Adjusted EBITDA) is averaged as a performance metric for cash awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The period of time revenue growth is averaged as a performance metric for cash awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The period of time performance is measured for cash awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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No definition available.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of noncash expense for share-based payment arrangement.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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Percentage of vesting of award under share-based payment arrangement.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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Stock-Based Compensation, Restricted Stock (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Compensation Expense [Abstract]
Stock-based compensation expense (benefit)	$ 5.7	$ 6.3	$ 6.6
Restricted Stock [Member]
Compensation Expense [Abstract]
Stock-based compensation expense (benefit)	5.0	4.3	4.5
Fair value of awards vesting	4.4	$ 4.5	4.4
Unrecognized compensation costs	$ 6.0
Weighted average period recognized	2 years 4 months 24 days
Assumptions for Stock Awards Granted [Abstract]
Award vesting period	4 years
Restricted Stock Activity [Roll Forward]
Non-vested balance, beginning of year (in shares)	0.7
Granted (in shares)	0.4
Vested (in shares)	(0.3)
Forfeited (in shares)	(0.1)
Non-vested balance, end of year (in shares)	0.7	0.7
Weighted Average Price [Rollforward]
Non-vested balance, beginning of year (in dollars per share)	$ 10.05
Granted (in dollars per share)	15.13
Vested (in dollars per share)	12.05
Forfeited (in dollars per share)	12.44
Non-vested balance, end of year (in dollars per share)	$ 11.61	$ 10.05
Restricted Stock [Member] \| Tranche One [Member]
Assumptions for Stock Awards Granted [Abstract]
Annual vesting percentage	25.00%
Restricted Stock [Member] \| Tranche Two [Member]
Assumptions for Stock Awards Granted [Abstract]
Annual vesting percentage	25.00%
Restricted Stock [Member] \| Tranche Three [Member]
Assumptions for Stock Awards Granted [Abstract]
Annual vesting percentage	25.00%
Restricted Stock [Member] \| Tranche Four [Member]
Assumptions for Stock Awards Granted [Abstract]
Annual vesting percentage	25.00%
Performance Stock Awards [Member]
Compensation Expense [Abstract]
Stock-based compensation expense (benefit)	$ (0.4)	$ 1.1	$ 0.8
Unrecognized compensation costs	$ 0.0
Assumptions for Stock Awards Granted [Abstract]
Award vesting period	3 years
Weighted Average Price [Rollforward]
Performance period	3 years
Period of time to average cash flow return on invested capital	3 years
Period of time to average revenue growth	3 years
Period of time to average EBITDA growth	3 years