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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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Feb. 01, 2015 Y | Feb. 02, 2014 | Feb. 03, 2013
Defined Contribution Plan Disclosure [Line Items] |  |  |
Employer matching contribution | 50.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch |  |
Defined contribution retirement plan, maximum percentage of salary deferral contributions subject to match by employer | 6.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent |  |
Years of service required to be eligible for company matching contributions | 1 wsm_YearOfServiceRequiredToBeCompletedBeforeEligibleToReceiveCompanyMatchingContributions |  |
Matching contribution, vesting percentage per year during first five years of employment | 20.00%wsm_DefinedContributionPlanEmployersMatchingContributionVestingPercentageDuringFirstFiveYearsOfEmployment |  |
Contributions to the profit sharing plan | $ 6,038,000 us-gaap_DefinedBenefitPlanContributionsByEmployer | $ 5,538,000 us-gaap_DefinedBenefitPlanContributionsByEmployer | $ 5,517,000 us-gaap_DefinedBenefitPlanContributionsByEmployer
Deferred compensation liabilities included in other long-term obligations | 14,446,000 us-gaap_OtherDeferredCompensationArrangementsLiabilityClassifiedNoncurrent | 15,190,000 us-gaap_OtherDeferredCompensationArrangementsLiabilityClassifiedNoncurrent |
Cash surrender value of the life insurance policies | $ 17,422,000 us-gaap_CashSurrenderValueOfLifeInsurance | $ 16,652,000 us-gaap_CashSurrenderValueOfLifeInsurance |
Eligible Employees |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Defined contribution retirement plan, maximum percentage of salary deferral contributions by employee | 75.00%us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent / wsm_TypeOfEmployeeAxis = wsm_EligibleEmployeesMember |  |
Highly-Compensated Employees |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Defined contribution retirement plan, maximum percentage of salary deferral contributions by employee | 7.00%us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent / wsm_TypeOfEmployeeAxis = wsm_HighlyCompensatedEmployeesMember |  |

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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 17 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 4 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6812-107765 + Details
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- Definition The increase in the fair value of plan assets from contributions made by the employer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
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- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
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- Definition Aggregate carrying value as of the balance sheet date of the liabilities for deferred compensation arrangements payable after one year (or the operating cycle, if longer) other than those specified elsewhere in the taxonomy. + References No definition available. + Details
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- Definition Percentage of employer's matching contributions to a defined contribution plan that vests during first five years of employment. + References No definition available. + Details
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