Cover Page - shares	3 Months Ended
	May 03, 2020	Jun. 05, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	May 03, 2020
Document Transition Report	false
Entity File Number	001-33608
Entity Registrant Name	lululemon athletica inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	20-3842867
Entity Address, Address Line One	1818 Cornwall Avenue
Entity Address, City or Town	Vancouver
Entity Address, State or Province	BC
Entity Address, Postal Zip Code	V6J 1C7
City Area Code	604
Local Phone Number	732-6124
Title of 12(b) Security	Common Stock, par value $0.005 per share
Trading Symbol	LULU
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		124,814,503
Entity Shell Company	false
Amendment Flag	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Entity Central Index Key	0001397187
Current Fiscal Year End Date	--01-31