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Stock-Based Awards - Additional Information (Details) |  | 12 Months Ended
--- | --- | ---
Apr. 18, 2019 Installment $ / shares shares | Feb. 01, 2020 USD ($) Installment $ / shares shares | Feb. 02, 2019 USD ($) | Feb. 03, 2018 USD ($)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Authorized | shares |  | 9,000,000.0 |  |
Available for grant | shares |  | 8,500,000 |  |
Number of vesting installments | Installment |  | 5 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value | $ |  | $ 1,000,000 | $ 16,000,000 | $ 3,000,000
Stock options exercisable, weighted average remaining contractual life |  | 10 months 24 days |  |
Stock options exercisable, intrinsic value | $ |  | $ 0 |  |
Closing stock price | $ / shares |  | $ 42.75 |  |
Aggregate fair value of awards at the time of vesting | $ |  | $ 50,000,000 | 57,000,000 | 40,000,000
Total share-based compensation expense | $ |  | 56,000,000 | $ 87,000,000 | $ 55,000,000
Total unrecognized share-based compensation expense for al share-based payment plans | $ |  | $ 89,000,000 |  |
Weighted average period, years |  | 1 year 3 months 18 days |  |
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 |  |  |
Number of shares to be purchased warrants,vested | shares |  | 349,489 |  |
Number of shares to be purchased warrants, Unvested | shares |  | 1,397,952 |  |
Warrants vest, expiration date | Apr. 18, 2026 |  |  |
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 |  |
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 |  |
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 |  |
Director [Member] | Employee Stock Option [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Term of options granted, years |  | 10 years |  |

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