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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 | 9 Months Ended
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Jan. 31, 2022 | Jan. 31, 2021 | Jan. 31, 2022 | Jan. 31, 2021
Reconciliation of Consolidated US GAAP Operating Income to Non-GAAP Adjusted Contribution to Profit [Abstract] |  |  |  |  |
US GAAP Operating Income |  | $ 45,989 | $ 34,327 | $ 160,845 | $ 134,271
Adjustments [Abstract] |  |  |  |  |
Restructuring and related charges (credits) | [1] | 448 | 20,675 | (1,161) | 24,813
Non-GAAP Adjusted Contribution to Profit |  | $ 46,437 | $ 55,002 | $ 159,684 | $ 159,084
[1] | See Note 9, “Restructuring and Related Charges (Credits)” for these charges by segment.

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