Summary Of Significant Accounting Policies (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Summary Of Significant Accounting Policies [Line Items]
Book overdrafts included in accounts payable	$ 2,900	$ 15,200
Marketing and advertising	262,000	255,100	$ 269,800
Defined contribution plan, cost	26,600	18,800	19,300
Expenses related to severance benefits	8,400	2,500	$ 5,000
Operating Lease, Right-of-Use Asset	437,246	$ 494,788
Operating Lease, Liability	$ 449,019
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
Leasehold improvements | Maximum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	8 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
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