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Share-Based Compensation - Summary of Employee Restricted Stock Unit Award Grants (Details) - Employee stock unit awards
shares in Thousands
12 Months Ended
Jan. 26, 2020
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Stock units granted (in shares) | shares 921
Weighted average fair value units granted (in dollars per share) | $ / shares $ 47.88