Common Shares (Details) - shares shares in Millions	Jul. 31, 2025	Apr. 30, 2025
Common Shares Information
Common shares authorized	300.0	300.0
Common shares outstanding	106.7	106.4
Treasury shares outstanding	43.8	44.1

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
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-Publisher FASB
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

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Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
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- References

No definition available.

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- Definition

Number of previously issued common shares repurchased by the issuing entity and held in treasury.

+ References

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