New Accounting Pronouncements (Details) - USD ($) $ in Millions	Jan. 24, 2020	Apr. 27, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use assets	$ 995
Total lease liability	$ 1,020
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use assets		$ 1,000
Total lease liability		$ 1,000