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Williams-Sonoma, Inc. 401(k) Plan and Other Employee Benefits - Additional Information (Detail) - USD ($)	12 Months Ended
	Feb. 03, 2019	Jan. 28, 2018	Jan. 29, 2017
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	$ 9,036,000	$ 8,224,000	$ 7,725,000
Deferred compensation liabilities included in other long-term obligations	23,319,000	24,151,000
Cash surrender value of the life insurance policies	$ 25,390,000	$ 25,550,000
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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Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity.

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