Fair Value Measurements - Summary of Carrying and Fair Values of Term Loans (Details) - USD ($) $ in Millions	Jul. 31, 2021	Aug. 01, 2020
Term Loan due 2023 | Carrying Value
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Carrying and fair values of term loans		$ 631.8
Term Loan due 2023 | Fair Value
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Carrying and fair values of term loans		461.2
Term Loan Due 2024 | Carrying Value
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Carrying and fair values of term loans		80.2
Term Loan Due 2024 | Fair Value
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Carrying and fair values of term loans		$ 36.1
Term Loan due 2028 | Carrying Value
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Carrying and fair values of term loans	$ 665.5
Term Loan due 2028 | Fair Value
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Carrying and fair values of term loans	$ 662.2