Derivative Financial Instruments - Narrative (Details) $ in Millions	Aug. 02, 2026 USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative assets	$ 6.3
Derivative liabilities	$ 8.4

Derivative Liability, Subject To Master Netting Arrangement

No definition available.

Name:	lulu_DerivativeLiabilitySubjectToMasterNettingArrangement
Namespace Prefix:	lulu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant