Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 835
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
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Period Type:	duration

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
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Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

+ Details

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Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- 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

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- 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

+ Details

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

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Weighted average interest rate of long-term debt outstanding calculated at point in time.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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

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Namespace Prefix:	wsm_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- 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

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Namespace Prefix:	wsm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Letter of credit facility maximum borrowing capacity after renewal.

+ References

No definition available.

+ Details

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Namespace Prefix:	wsm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Expiration date for future letters of credit issued under the letter of credit facilities.

+ References

No definition available.

+ Details

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Namespace Prefix:	wsm_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Additional borrowing capacity that may be requested upon notice to the lenders.

+ References

No definition available.

+ Details

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Namespace Prefix:	wsm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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

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Namespace Prefix:	wsm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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Borrowing Arrangements - Additional Information (Detail) - USD ($)		3 Months Ended		6 Months Ended
	Aug. 23, 2020	Aug. 02, 2020	Aug. 04, 2019	Aug. 02, 2020	Aug. 04, 2019
Debt Instrument [Line Items]
Maximum borrowing capacity under letter of credit facilities including additional borrowing capacity		$ 70,000,000		$ 70,000,000
Interest rate description				Interest on unreimbursed amounts under the letter of credit facilities accrues at a base rate as defined in the credit facility plus an applicable margin based on our leverage ratio.
Letter of credit facilities, maturity date				Aug. 23, 2020
Outstanding letter of credit facilities		11,335,000		$ 11,335,000
Latest expiration date possible for future letters of credit				Jan. 21, 2021
Borrowings under revolving line of credit				$ 487,823,000	$ 60,000,000
Line of credit		499,495,000		499,495,000
Standby Letters of Credit
Debt Instrument [Line Items]
Amount issued but undrawn under credit facility		11,672,000		11,672,000
Revolving Credit Facility [Member] \| 364-Day Credit Agreement [Member]
Debt Instrument [Line Items]
Current borrowing capacity		$ 200,000,000		200,000,000
Revolving line, maturity date		May 10, 2021
Interest rate description		Under the 364-Day Credit Agreement, the interest rate is variable and may be elected by us as: (i) LIBOR plus an applicable margin based on our leverage ratio ranging from 1.75% to 2.5% or (ii) a base rate as defined in the agreement, plus an applicable margin ranging from 0.75% to 1.5%. The 364-Day Credit Agreement matures on May 10, 2021.
Letter Of Credit Facility Renewed And Extended [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Letter of credit facilities, maturity date	Aug. 22, 2021
Maximum borrowing capacity of letter of credit after renewal	$ 35,000,000
Base Rate \| Maximum \| Revolving Credit Facility [Member] \| 364-Day Credit Agreement [Member]
Debt Instrument [Line Items]
Leverage ratio		1.50%
Base Rate \| Minimum \| Revolving Credit Facility [Member] \| 364-Day Credit Agreement [Member]
Debt Instrument [Line Items]
Leverage ratio		0.75%
London Interbank Offered Rate (LIBOR) [Member] \| Maximum \| Revolving Credit Facility [Member] \| 364-Day Credit Agreement [Member]
Debt Instrument [Line Items]
Leverage ratio		2.50%
London Interbank Offered Rate (LIBOR) [Member] \| Minimum \| Revolving Credit Facility [Member] \| 364-Day Credit Agreement [Member]
Debt Instrument [Line Items]
Leverage ratio		1.75%
Unsecured Revolving Line Of Credit
Debt Instrument [Line Items]
Current borrowing capacity		$ 500,000,000		$ 500,000,000
Revolving line, maturity date				May 10, 2021
Weighted average interest rate		2.48%	3.42%	2.48%	3.42%
Interest rate description				Under the Credit Facility Amendment, the interest rate applicable to the credit facility is variable, and may be elected by us as: (i) the LIBOR plus an applicable margin based on our leverage ratio ranging from 0.91% to 1.775% for a revolver borrowing, and 1.75% to 2.5% for the term loan, or (ii) a base rate as defined in the credit facility, plus an applicable margin ranging from 0% to 0.775% for a revolver borrowing, and 0.75% to 1.5% for the term loan.
Maximum borrowing capacity including additional borrowing capacity		$ 250,000,000		$ 250,000,000
Borrowings under revolving line of credit		487,823,000,000	$ 60,000,000,000
Unsecured Revolving Line Of Credit \| Maximum
Debt Instrument [Line Items]
Additional borrowing capacity		750,000,000		$ 750,000,000
Unsecured Revolving Line Of Credit \| Margin Based On Leverage Ratio \| Maximum
Debt Instrument [Line Items]
Leverage ratio				1.775%
Unsecured Revolving Line Of Credit \| Margin Based On Leverage Ratio \| Minimum
Debt Instrument [Line Items]
Leverage ratio				0.91%
Unsecured Revolving Line Of Credit \| Base Rate \| Maximum
Debt Instrument [Line Items]
Leverage ratio				0.775%
Unsecured Revolving Line Of Credit \| Base Rate \| Minimum
Debt Instrument [Line Items]
Leverage ratio				0.00%
Unsecured Term Loan Facility
Debt Instrument [Line Items]
Debt instrument face amount		$ 300,000,000		$ 300,000,000
Weighted average interest rate		2.89%		2.89%
Long term debt		$ 300,000,000		$ 300,000,000
Debt instrument, maturity date				Jan. 08, 2023
Unsecured Term Loan Facility \| Margin Based On Leverage Ratio \| Maximum
Debt Instrument [Line Items]
Leverage ratio				2.50%
Unsecured Term Loan Facility \| Margin Based On Leverage Ratio \| Minimum
Debt Instrument [Line Items]
Leverage ratio				1.75%
Unsecured Term Loan Facility \| Base Rate \| Maximum
Debt Instrument [Line Items]
Leverage ratio				1.50%
Unsecured Term Loan Facility \| Base Rate \| Minimum
Debt Instrument [Line Items]
Leverage ratio				0.75%