Blackberry Limited and Summary of Significant Accounting Policies and Critical Accounting Estimates - Additional Information (Details) endpoint in Millions	12 Months Ended
Feb. 28, 2025 operatingSegment endpoint
Additional Information [Line Items]
Number of endpoints secured, vehicles \| endpoint	235
Number of Operating Segments \| operatingSegment	3
Liability for uncertain income tax positions, percentage minimum	50.00%
Minimum
Additional Information [Line Items]
Maturity period of long-term investments	1 year
Maximum
Additional Information [Line Items]
Maturity period of cash equivalents	3 months
Maturity period of short-term investments	1 year

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 49
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-49

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-18

Name:	us-gaap_NumberOfOperatingSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration