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Segment Information, Reconciliation of Consolidated U.S. GAAP Operating Income (Loss) to Non-GAAP Adjusted Operating Income (Details) - USD ($) $ in Thousands		12 Months Ended
		Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2020
Reconciliation of Consolidated US GAAP Operating Income (Loss) to Non-GAAP Adjusted Contribution to Profit [Abstract]
US GAAP Operating Income (Loss)		$ 219,276	$ 185,511	$ (54,287)
Adjustments [Abstract]
Restructuring and related (credits) charges	[1]	(1,427)	33,310	32,607
Impairment of goodwill	[1]	0	0	110,000
Non-GAAP Adjusted Operating Income		217,849	218,821	180,668
Developed Technology [Member]
Adjustments [Abstract]
Impairment of intangible assets	[1]	0	0	2,841
Blackwell Trade Name [Member]
Adjustments [Abstract]
Impairment of intangible assets	[1]	$ 0	$ 0	$ 89,507
[1] See Note 7, “Restructuring and Related (Credits) Charges” and Note 11, “Goodwill and Intangible Assets” for these charges by segment.

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