Summary Of Significant Accounting Policies (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2018
Summary Of Significant Accounting Policies [Line Items]
Book overdrafts included in accounts payable	$ 15,200	$ 20,900
Investments	11,200	40,000
Marketing and advertising	255,100	269,800	$ 249,100
Defined contribution plan, cost	18,800	19,300	16,400
Expenses related to severance benefits	2,500	$ 5,000	$ 4,000
ROU asset	494,788
Lease liability	$ 508,103
Minimum
Summary Of Significant Accounting Policies [Line Items]
Term of lease	3 years
Maximum
Summary Of Significant Accounting Policies [Line Items]
Term of lease	5 years
Buildings | Minimum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	15 years
Buildings | Maximum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	40 years
Computers and other equipment | Minimum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	2 years
Computers and other equipment | Maximum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	5 years
Purchased software | Minimum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	3 years
Purchased software | Maximum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	5 years
Leasehold improvements | Maximum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	8 years