Earnings Per Share - Additional Information (Details) - shares	12 Months Ended
Jan. 25, 2020	Jan. 26, 2019	Jan. 27, 2018
Antidilutive securities excluded from computation of earnings per share
Included as dilutive		3,362,687	3,208,143
Stock option
Antidilutive securities excluded from computation of earnings per share
Antidilutive shares excluded from calculation of diluted net income per common share	7,695,386	2,029,602	146,457
Included as dilutive	601,672
RSUs
Antidilutive securities excluded from computation of earnings per share
Antidilutive shares excluded from calculation of diluted net income per common share	7,695,386	2,029,602	146,457
Included as dilutive	601,672

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 28A
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