Represents the number of consecutive trading days when target was exceeded.

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Represents the number of equity compensation plans.

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The percentage expansion of Adjusted Net Income based on Comparable Store Sales and Adjusted Net Income as reported.

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The percentage of target, number of shares delivered on settlement of awards.

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The percentage of comparable sales growth rate.

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Represents the total fair value of options granted during the reporting period.

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Tax expense (benefit )amount on cancellation of options.

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Represents the number of periods over which the stock-based compensation expense will be expensed or written off.

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No definition available.

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Aggregate number of common shares reserved for future issuance.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of additional shares authorized for issuance under share-based payment arrangement.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Gross number of share options (or share units) granted during the period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Percentage of vesting of award under share-based payment arrangement.

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Stock-Based Compensation (Details) $ / shares in Units, $ in Millions					1 Months Ended	3 Months Ended	12 Months Ended
	Jan. 29, 2022	Sep. 12, 2019 USD ($) shares	Jun. 12, 2018 USD ($) shares	Aug. 03, 2016 USD ($)	Jun. 30, 2018 shares	Jul. 28, 2018 USD ($)	Jan. 25, 2020 USD ($) plan $ / shares shares	Jan. 26, 2019 USD ($) $ / shares	Jan. 27, 2018 USD ($)	Jul. 31, 2016 shares
Stock-Based Compensation
Number of equity compensation plans \| plan							2
Stock-based compensation expense \| $							$ 7.4	$ 49.5	$ 13.8
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized \| $							$ 15.1
Chairman and Chief Executive Officer
Stock-Based Compensation
Stock-based compensation expense \| $						$ 41.5
IPO Bonus Pool
Stock-Based Compensation
Vesting period (in years)							7 years
Trading days							20 days
Total grant date fair value \| $				$ 20.0
2012 stock option plan
Stock-Based Compensation
Common stock reserved for issuance							5,648,525
Share available for future grant							11,278
Vesting period (in years)							4 years
Contractual terms							10 years
2016 Equity Plan
Stock-Based Compensation
Common stock reserved for issuance					9,696,755					6,196,755
Share available for future grant							4,906,331
Exercise price \| $ / shares							$ 14.80	$ 21.43
Additional number of shares authorized to be granted					3,500,000
Comparable Store Sales Growth		50.00%
Percentage expansion of Adjusted Net Income		50.00%
Number of units granted							778,797
2016 Equity Plan \| Achievement of threshold performance levels
Stock-Based Compensation
Percentage of Settlement on Target		50.00%
2016 Equity Plan \| Achievement of target performance levels
Stock-Based Compensation
Percentage of Settlement on Target		100.00%
2016 Equity Plan \| Achievement at or above maximum performance levels
Stock-Based Compensation
Percentage of Settlement on Target		200.00%
2016 Equity Plan \| IPO Bonus Pool
Stock-Based Compensation
Common stock reserved for issuance										2,478,702
2016 Equity Plan \| Post IPO Share Pool
Stock-Based Compensation
Common stock reserved for issuance					7,218,053					3,718,053
Stock option
Stock-Based Compensation
Expense period							2 years 1 month 6 days
Stock option \| Chairman and Chief Executive Officer
Stock-Based Compensation
Stock-based compensation expense \| $			$ 41.5
Number of units granted			1,988,255
Stock option \| 2016 Equity Plan
Stock-Based Compensation
Stock-based compensation expense \| $		$ 0.8
Number of units granted		165,650
RSUs
Stock-Based Compensation
Expense period							2 years 7 months 6 days
RSUs \| Minimum
Stock-Based Compensation
Vesting period (in years)							1 year
RSUs \| Maximum
Stock-Based Compensation
Vesting period (in years)							4 years
PSU \| 2016 Equity Plan
Stock-Based Compensation
Stock-based compensation expense \| $		$ 1.0
Cliff vesting percentage	100.00%
Number of units granted		125,250
One Time CEO Grant \| 2016 Equity Plan \| Option Cancellation Agreement
Stock-Based Compensation
Deferred tax expense \| $							$ 9.3