Derivative Financial Instruments - Fair Value of Interest Rate Contracts Included in Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Apr. 25, 2020	Apr. 27, 2019
Derivatives, Fair Value [Line Items]
Interest rate contracts, assets, fair value	$ 204	$ 380
Interest rate, liabilities, fair value	19,849	3,194
Interest rate contracts
Derivatives, Fair Value [Line Items]
Interest rate, liabilities, fair value	19,849	3,194
Other non-current assets | Interest rate contracts
Derivatives, Fair Value [Line Items]
Interest rate contracts, assets, fair value	204	380
Other accrued liabilities | Interest rate contracts
Derivatives, Fair Value [Line Items]
Interest rate, liabilities, fair value	6,789	1,034
Other non-current liabilities | Interest rate contracts
Derivatives, Fair Value [Line Items]
Interest rate, liabilities, fair value	$ 13,060	$ 2,160