Consolidated Balance Sheets Details - Other Current Assets (Details)	6 Months Ended	12 Months Ended
Aug. 31, 2021	Feb. 28, 2021
Condensed Balance Sheet Statements, Captions [Line Items]
Other current assets greater than five percent of current assets	none	none
Other Long-Term Assets Greater than Five Percent of Total Assets	none	none

Other Current Assets Greater than Five Percent of Current Assets

No definition available.

Name:	bbry_OtherCurrentAssetsGreaterthanfivepercentofCurrentAssets
Namespace Prefix:	bbry_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration