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Williams-Sonoma, Inc. 401(k) Plan and Other Employee Benefits - Additional Information (Detail) - USD ($) | 12 Months Ended
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Jan. 31, 2021 | Feb. 02, 2020 | Feb. 03, 2019
Defined Contribution Plan Disclosure [Line Items] |  |  |
Employer matching contribution | 50.00% |  |
Defined contribution retirement plan, maximum percentage of salary deferral contributions subject to match by employer | 6.00% |  |
Years of service required to be eligible for company matching contributions | 1 year |  |
Matching contribution, vesting percentage per year during first five years of employment | 20.00% |  |
Contributions to the profit sharing plan | $ 9,990,000 | $ 9,544,000 | $ 9,036,000
Deferred compensation liabilities included in other long-term obligations | 34,988,000 | 30,534,000 |
Cash surrender value of the life insurance policies | $ 36,011,000 | $ 31,886,000 |
Eligible Employees |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Defined contribution retirement plan, maximum percentage of salary deferral contributions by employee | 75.00% |  |
Highly-Compensated Employees |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Defined contribution retirement plan, maximum percentage of salary deferral contributions by employee | 7.00% |  |

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