Capital Stock [Abstract]

No definition available.

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- Definition

Amount authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481520/505-30-50-4

+ Details

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- Definition

Number of shares authorized to be purchased under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

+ References

+ Details

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- Definition

Amount remaining authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

+ References

No definition available.

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- Definition

Number of shares remaining authorized to be purchased under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

+ References

No definition available.

+ Details

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- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-SubTopic 10
-Topic 505
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-Paragraph 1
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-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

+ Details

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- References

No definition available.

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- Definition

Total cost of shares repurchased divided by the total number of shares repurchased.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481549/505-30-45-1

+ Details

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- Details

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Capital Stock and Changes in Capital Accounts - Share Repurchases (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2020	Apr. 30, 2017
Class A
Share Repurchases [Abstract]
Stock repurchased during period (in shares)	1,294	831	542
Treasury stock acquired, average cost per share (usd per share)	$ 34.71	$ 42.07	$ 55.14
Class B
Share Repurchases [Abstract]
Stock repurchased during period (in shares)	3	1	2
Treasury stock acquired, average cost per share (usd per share)	$ 34.71	$ 42.07	$ 55.14
2020 Share Repurchase Program
Capital Stock [Abstract]
Stock repurchase program, authorized amount				$ 200.0
Remaining amount authorized to be repurchased under the share repurchase program	$ 117.4
2017 Share Repurchase Program
Capital Stock [Abstract]
Additional shares of common stock approved for repurchase under the share repurchase program (in shares)					4,000
Stock repurchase program, remaining number of shares authorized to be repurchased		0