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Stock-Based Compensation - Summary of Restricted Stock Units Award Activity (Details) - Class A Common Stock - Restricted stock units that settle into Class A common stock
 6 Months Ended
Jan. 28, 2023
$ / shares
shares
Class A Common Stock  
Unvested, beginning balance (in shares) | shares 19,217,622
Granted (in shares) | shares 3,038,609
Vested (in shares) | shares (3,099,038)
Forfeited (in shares) | shares (5,411,847)
Unvested, ending balance (in shares) | shares 13,745,346
Weighted- Average Grant Date Fair Value  
Unvested, beginning balance (in dollars per share) | $ / shares $ 16.09
Granted (in dollars per share) | $ / shares 4.00
Vested (in dollars per share) | $ / shares 14.25
Forfeited (in dollars per share) | $ / shares 15.36
Unvested, ending balance (in dollars per share) | $ / shares $ 14.12