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Summary of Stock Option Activity (Parenthetical) (Detail)	3 Months Ended
	May 03, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested percentage	100.00%wsm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedPercentage

X

- Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percent of share options (or share units) vested as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	wsm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedPercentage
Namespace Prefix:	wsm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration