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Borrowing Arrangements - Additional Information (Detail) (USD $) | 12 Months Ended
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Feb. 01, 2015 | Feb. 02, 2014
Debt Instrument [Line Items] |  |
Amount outstanding under credit facility | $ 0 us-gaap_LineOfCredit | $ 0 us-gaap_LineOfCredit
Amount of borrowings under credit facility during period | 90,000,000 us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod | 0 us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod
Standby Letters of Credit |  |
Debt Instrument [Line Items] |  |
Amount issued but undrawn under credit facility | 14,760,000 wsm_LineOfCreditFacilityAmountIssuedButUndrawn / us-gaap_CreditFacilityAxis = us-gaap_StandbyLettersOfCreditMember |
Unsecured Letter Of Credit Facilities |  |
Debt Instrument [Line Items] |  |
Additional percentage over reference rate | 2.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = us-gaap_LetterOfCreditMember |
Interest rate description | Interest on unreimbursed amounts under the letter of credit facilities accrues at the lender's prime rate (or, if greater, the average rate on overnight federal funds plus one-half of one percent) plus 2.0%. |
Maximum borrowing capacity under letter of credit facilities including additional borrowing capacity | 70,000,000 wsm_LetterOfCreditFacilitiesMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = us-gaap_LetterOfCreditMember |
Letter of credit facilities, maturity date | Aug. 28, 2015 |
Outstanding letter of credit facilities | 9,651,000 us-gaap_LettersOfCreditOutstandingAmount / us-gaap_CreditFacilityAxis = us-gaap_LetterOfCreditMember |
Latest expiration date possible for future letters of credit | Jan. 25, 2016 |
Unsecured Revolving Line Of Credit |  |
Debt Instrument [Line Items] |  |
Current borrowing capacity | 500,000,000 us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity / us-gaap_LongtermDebtTypeAxis = wsm_UnsecuredRevolvingLineOfCreditMember |
Maximum borrowing capacity including additional borrowing capacity | 750,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_LongtermDebtTypeAxis = wsm_UnsecuredRevolvingLineOfCreditMember |
Credit facility, maturity date | Nov. 19, 2019 |
Interest rate description | We may elect interest rates calculated at (i) Bank of America's prime rate (or, if greater, the average rate on overnight federal funds plus one-half of one percent, or a rate based on LIBOR plus one percent) plus a margin based on our leverage ratio or (ii) LIBOR plus a margin based on our leverage ratio. |
Unsecured Revolving Line Of Credit | Maximum |  |
Debt Instrument [Line Items] |  |
Additional borrowing capacity | $ 250,000,000 wsm_LineOfCreditFacilityAdditionalBorrowingCapacity / us-gaap_LongtermDebtTypeAxis = wsm_UnsecuredRevolvingLineOfCreditMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
Federal Funds | Unsecured Letter Of Credit Facilities |  |
Debt Instrument [Line Items] |  |
Additional percentage over reference rate | 0.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = us-gaap_LetterOfCreditMember / wsm_ReferenceRateAxis = wsm_FederalFundsMember |
Federal Funds | Unsecured Revolving Line Of Credit |  |
Debt Instrument [Line Items] |  |
Additional percentage over reference rate | 0.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = wsm_UnsecuredRevolvingLineOfCreditMember / wsm_ReferenceRateAxis = wsm_FederalFundsMember |
Libor | Unsecured Revolving Line Of Credit |  |
Debt Instrument [Line Items] |  |
Additional percentage over reference rate | 1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = wsm_UnsecuredRevolvingLineOfCreditMember / wsm_ReferenceRateAxis = wsm_LiborMember |

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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
Name: | us-gaap_LineOfCredit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. + 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 210.5-02.19(b),22(b)) -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 19, 22 -Article 5 + Details
Name: | us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Date the credit facility terminates, in CCYY-MM-DD format. + 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 210.5-02.19(b),22(b)) -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 19, 22 -Article 5 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

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- Definition Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions). + 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 210.5-02.19(b),22(b)) -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 19, 22 -Article 5 + Details
Name: | us-gaap_LineOfCreditFacilityInterestRateDescription
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Maximum amount borrowed under the credit facility at any time during the period. + References No definition available. + Details
Name: | us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + 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 210.5-02.19(b),22(b)) -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 19, 22 -Article 5 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Reflects when the letter of credit facilities terminates, which may be presented in a variety of ways (year, month and year, day, month and year, quarter). + References No definition available. + Details
Name: | wsm_LetterOfCreditFacilitiesMaturityDate
Namespace Prefix: | wsm_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

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- Definition Maximum borrowing capacity under the letter of credit facilities without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facilities. + References No definition available. + Details
Name: | wsm_LetterOfCreditFacilitiesMaximumBorrowingCapacity
Namespace Prefix: | wsm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Expiration date for future letters of credit issued under the letter of credit facilities. + References No definition available. + Details
Name: | wsm_LineOfCreditExpirationDateForFutureCreditFacilities
Namespace Prefix: | wsm_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

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- Definition Additional borrowing capacity that may be requested upon notice to the lenders. + References No definition available. + Details
Name: | wsm_LineOfCreditFacilityAdditionalBorrowingCapacity
Namespace Prefix: | wsm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount available to be drawn upon by standby letter of credit beneficiaries under the credit facility as of the balance sheet date. + References No definition available. + Details
Name: | wsm_LineOfCreditFacilityAmountIssuedButUndrawn
Namespace Prefix: | wsm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_LetterOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_StandbyLettersOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_LongtermDebtTypeAxis=wsm_UnsecuredRevolvingLineOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | wsm_ReferenceRateAxis=wsm_FederalFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |