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Williams-Sonoma, Inc. 401(k) Plan and Other Employee Benefits - Additional Information (Detail) (USD $)	12 Months Ended
	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	1wsm_YearOfServiceRequiredToBeCompletedBeforeEligibleToReceiveCompanyMatchingContributions
Matching contribution, vesting percentage per year during first five years of employment	20.00%wsm_DefinedContributionPlanEmployersMatchingContributionVestingPercentageDuringFirstFiveYearsOfEmployment
Contributions to the profit sharing plan	$ 6,038,000us-gaap_DefinedBenefitPlanContributionsByEmployer	$ 5,538,000us-gaap_DefinedBenefitPlanContributionsByEmployer	$ 5,517,000us-gaap_DefinedBenefitPlanContributionsByEmployer
Deferred compensation liabilities included in other long-term obligations	14,446,000us-gaap_OtherDeferredCompensationArrangementsLiabilityClassifiedNoncurrent	15,190,000us-gaap_OtherDeferredCompensationArrangementsLiabilityClassifiedNoncurrent
Cash surrender value of the life insurance policies	$ 17,422,000us-gaap_CashSurrenderValueOfLifeInsurance	$ 16,652,000us-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

X

- 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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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- 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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- Details

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X

- 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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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage employer matches of the employee's percentage contribution matched.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
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X

- 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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Namespace Prefix:	us-gaap_
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X

- 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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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- 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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Namespace Prefix:	wsm_
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X

- Definition

Years of service required to be completed before being eligible to receive company matching contributions.

+ References

No definition available.

+ Details

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Namespace Prefix:	wsm_
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- Details

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