Reportable Segments - Narrative (Details) $ in Millions	12 Months Ended
Apr. 30, 2021 USD ($) Segment Industry	Apr. 30, 2020 USD ($)	Apr. 30, 2019
Concentration Risk [Line Items]
Number of industries in which Company operates \| Industry	1
Number of reportable segments \| Segment	3
Trade receivables – net	$ 533.7	$ 551.4
Wal-Mart Stores, Inc. [Member] \| Major Customer [Member]
Concentration Risk [Line Items]
Trade receivables – net	$ 149.7	$ 131.9
Wal-Mart Stores, Inc. [Member] \| Major Customer [Member] \| Revenue from Contract with Customer [Member]
Concentration Risk [Line Items]
Percentage of concentration risk	32.00%	32.00%	32.00%

Number of industries in which company operates.

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Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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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.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

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