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Cover - USD ($) $ in Millions	12 Months Ended
Cover - USD ($) $ in Millions	Feb. 29, 2024	Apr. 01, 2024	Aug. 31, 2023
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Feb. 29, 2024
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
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
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
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 3,200
Entity Common Stock, Shares Outstanding		589,233,606
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	FY
Entity Central Index Key	0001070235
Current Fiscal Year End Date	--02-29
Documents Incorporated by Reference	Portions of the registrant’s proxy statement for its 2024 Annual Meeting of Shareholders are incorporated by reference into Part III of this Annual Report on Form 10-K to the extent stated herein. Such proxy statement will be filed with the Securities and Exchange Commission within 120 days after the registrant’s fiscal year ended February 29, 2024.
NEW YORK STOCK EXCHANGE, INC. [Member]
Document Information [Line Items]
Title of 12(g) Security	Common Shares
Trading Symbol	BB
Security Exchange Name	NYSE