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Segment Information, Reconciliation of Consolidated US GAAP Operating Income to Non-GAAP Adjusted Contribution to Profit (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Oct. 31, 2021 | Oct. 31, 2020 | Oct. 31, 2021 | Oct. 31, 2020
Reconciliation of Consolidated US GAAP Operating Income to Non-GAAP Adjusted Contribution to Profit [Abstract] |  |  |  |  |
US GAAP Operating Income |  | $ 73,888 | $ 69,905 | $ 114,856 | $ 99,944
Adjustments [Abstract] |  |  |  |  |
Restructuring and related (credits) charges | [1] | (1,333) | 1,920 | (1,609) | 4,138
Non-GAAP Adjusted Contribution to Profit |  | $ 72,555 | $ 71,825 | $ 113,247 | $ 104,082
[1] | See Note 9, “Restructuring and Related (Credits) Charges” for these charges by segment.

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