INCOME TAXES (Narrative) (Details) - USD ($) $ in Thousands	9 Months Ended
Jan. 31, 2021	Jan. 31, 2020	Apr. 30, 2020
Income Tax Disclosure [Abstract]
Effective tax rate	9.00%	29.20%
Increase in effective tax rate from discrete item, percent	4.90%	4.30%
Discrete income tax expense (benefit)	$ 19,500	$ (27,700)
Gross unrecognized tax benefits increase (decrease)	65,600	(36,400)
Change in tax benefits that are reasonably possible	71,000
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits, beginning balance	233,690	148,700	$ 168,062
Additions based on tax positions related to prior years	117,770
Reductions based on tax positions related to prior years	(31,958)
Additions based on tax positions related to the current year	11,795
Reductions related to settlements with tax authorities	(26,556)
Expiration of statute of limitations	(5,423)
Unrecognized tax benefits. ending balance	$ 233,690	$ 148,700	$ 168,062

Effective Income Tax Rate Reconciliation, Discrete Adjustments, Amount

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Effective Income Tax Rate Reconciliation, Effect of Discrete Items, Percent

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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