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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares | 12 Months Ended
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Apr. 30, 2021 | Apr. 30, 2020 | Apr. 30, 2019
Class A [Member] |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Common stock dividend (in dollars per share) | $ 1.37 | $ 1.36 | $ 1.32
Class B [Member] |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Common stock dividend (in dollars per share) | $ 1.37 | $ 1.36 | $ 1.32

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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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