| Leases - Weighted-Average Remaining Lease Term and Discount Rate (Details) | Aug. 01, 2020 | Aug. 03, 2019 | 
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| Leases [Abstract] | ||
| Weighted-average remaining lease term | 6 years 3 months 18 days | 6 years 7 months 6 days | 
| Weighted-average discount rate | 4.10% | 4.40% | 
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- References No definition available. 
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- Definition Weighted average discount rate for operating lease calculated at point in time. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/exampleRef 
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