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Class of warrant or right number of securities vested.

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Closing stock price

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Share-based compensation arrangement by share-based payment award, Board Of Directors, Award Requisite Service Period

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Share-based Compensation Arrangement by Share-based Payment Award, Options, Term

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Warrants or rights vested expiration date.

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Warrants or rights vested second installment date.

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Warrants or rights vested start date.

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Warrants or rights vested third installment date.

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

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Exercise price per share or per unit of warrants or rights outstanding.

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Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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

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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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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Stock-Based Awards - Additional Information (Details)		12 Months Ended
Stock-Based Awards - Additional Information (Details)	Apr. 18, 2019 Installment $ / shares shares	Jan. 29, 2022 USD ($) Installment $ / shares shares	Jan. 30, 2021 USD ($)	Feb. 01, 2020 USD ($)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Authorized \| shares		9,000,000.0
Available for grant \| shares		6,100,000
Number of vesting installments \| Installment		5
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value			$ 0	$ 1,000,000
Stock options exercisable, weighted average remaining contractual life		3 months 18 days
Closing stock price \| $ / shares		$ 60.16
Aggregate fair value of awards at the time of vesting		$ 42,000,000	56,000,000	50,000,000
Total share-based compensation expense		48,000,000	$ 40,000,000	$ 56,000,000
Total unrecognized share-based compensation expense for al share-based payment plans		$ 85,000,000
Weighted average period, years		1 year 4 months 24 days
Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value		$ 1,000,000
Stock options exercisable, intrinsic value		$ 1,000,000
Amazon [Member] \| Commercial Agreement [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares to be purchased warrants \| shares	1,747,441
Exercise price of warrants \| $ / shares	$ 69.68
Estimated of fair value per warrant \| $ / shares	$ 17.52
Warrants, number of vesting annual installments \| Installment	5
Warrants vest, beginning date	Jan. 15, 2020
Warrants vest, second installment date	Jan. 15, 2021
Warrants vest, third installment date	Jan. 15, 2022
Number of shares to be purchased warrants,vested \| shares		1,048,465
Number of shares to be purchased warrants, Unvested \| shares		698,976
Warrants vest, expiration date	Apr. 18, 2026
Employee Stock Option [Member] \| Director [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Term of options granted, years		10 years
Non Vested Stock Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
General term of a elected director, years		5 years
Vesting term, years		1 year
Prior 2006 [Member] \| Employee Stock Option [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Term of options granted, years		15 years
After 2005 [Member] \| Employee Stock Option [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Term of options granted, years		7 years