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Income Taxes (Schedule Of Components Of Income From Continuing Operations) (Details) - USD ($)
$ in Thousands
12 Months Ended
Apr. 30, 2019
Apr. 30, 2018
Apr. 30, 2017
Income Tax Disclosure [Abstract]      
Domestic $ 389,319 $ 547,101 $ 535,378
Foreign 155,841 121,631 93,909
Income from continuing operations before income taxes $ 545,160 $ 668,732 $ 629,287