Reportable Segments - Narrative (Details) $ in Millions	12 Months Ended
Apr. 30, 2023 USD ($) Industry Segment	Apr. 30, 2022 USD ($)	Apr. 30, 2021 USD ($)
Concentration Risk [Line Items]
Number of industries in which Company operates \| Industry	1
Number of reportable segments \| Segment	3
Trade receivables – net	$ 597.6	$ 524.7
Pet Food Brands \| U.S. Retail Pet Foods [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Annual net sales	1,500.0	1,400.0	$ 1,400.0
Wal-Mart Stores, Inc. [Member] \| Major Customer [Member]
Concentration Risk [Line Items]
Trade receivables – net	$ 211.5	$ 179.9
Wal-Mart Stores, Inc. [Member] \| Major Customer [Member] \| Revenue from Contract with Customer [Member]
Concentration Risk [Line Items]
Percentage of concentration risk	34.00%	34.00%	32.00%

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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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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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Amount of revenue attributable to disposal group, including, but not limited to, discontinued operation.

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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.

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