Stock-Based Awards - RSU's and Performance RSU's (Details) - $ / shares	12 Months Ended
Jan. 30, 2021	Jan. 25, 2020	Jan. 26, 2019
RSUs
Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Outstanding [Roll Forward]
Beginning balance (in shares)	174,917
Granted (in shares)	557,838
Share units vested (in shares)	(66,620)
Forfeited or canceled (in shares)	(17,774)
Ending balance (in shares)	648,361	174,917
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value [Roll Forward]
Beginning balance (in dollars per shares)	$ 65.05
Granted (in dollars per shares)	27.75	$ 48.37	$ 97.90
Share units vested (in dollars per shares)	67.70
Forfeited or canceled (in dollars per shares)	41.95
Ending balance (in dollars per shares)	$ 33.29	$ 65.05
Performance RSUs
Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Outstanding [Roll Forward]
Beginning balance (in shares)	639,738
Granted (in shares)	65,538
Share units vested (in shares)	(17,134)
Forfeited or canceled (in shares)	(262,798)
Ending balance (in shares)	425,344	639,738
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value [Roll Forward]
Beginning balance (in dollars per shares)	$ 62.60
Granted (in dollars per shares)	25.15	$ 45.94	$ 106.19
Share units vested (in dollars per shares)	70.14
Forfeited or canceled (in dollars per shares)	66.64
Ending balance (in dollars per shares)	$ 54.03	$ 62.60

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

+ References

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-Publisher FASB
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-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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-Paragraph 2
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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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-Paragraph 2
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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

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-Publisher FASB
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- Definition

Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

+ References

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-Publisher FASB
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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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