Summary Of Significant Accounting Policies (Details) - USD ($) $ in Millions		12 Months Ended
	May 01, 2018	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2017	May 01, 2019
Summary Of Significant Accounting Policies [Line Items]
Book overdrafts included in accounts payable		$ 20.9	$ 27.2
Investments		40.0
Marketing and advertising		269.8	249.1	$ 261.3
Employer contributions		19.3	16.4	13.8
Expenses related to severance benefits		$ 5.0	$ 4.0	$ 5.6
Average
Summary Of Significant Accounting Policies [Line Items]
Contract term		4 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
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life		8 years
ASU 2016-16
Summary Of Significant Accounting Policies [Line Items]
Cumulative effect adjustment	$ 101.0
ASU 2016-02 | Subsequent event | Forecast
Summary Of Significant Accounting Policies [Line Items]
ROU asset					$ 500.0
Lease liability					$ 500.0