Cover - shares	6 Months Ended
	Aug. 31, 2023	Sep. 26, 2023
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Aug. 31, 2023
Document Transition Report	false
Entity File Number	001-38232
Entity Registrant Name	BlackBerry Limited
Entity Incorporation, State or Country Code	Z4
Entity Tax Identification Number	98-0164408
Entity Address, Address Line One	2200 University Ave East
Entity Address, City or Town	Waterloo
Entity Address, State or Province	ON
Entity Address, Country	CA
Entity Address, Postal Zip Code	N2K 0A7
City Area Code	(519)
Local Phone Number	888-7465
Title of 12(g) Security	Common Shares
Trading Symbol	BB
Security Exchange Name	NYSE
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 Shell Company	false
Entity Common Stock, Shares Outstanding		583,708,105
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q2
Entity Central Index Key	0001070235
Current Fiscal Year End Date	--02-29