Blackberry Limited and Summary of Significant Accounting Policies and Critical Accounting Estimates - Stock-based Compensation (Details) - shares |
12 Months Ended | |
|---|---|---|
Feb. 28, 2026 |
Feb. 28, 2025 |
|
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | ||
| Number of common shares authorized under the Equity Plan (in shares) | 60,875,000 | |
| RSUs, forfeited, settled in cash or sold to cover withholding tax requirements, counted as (in shares) impact to Equity Plan | 1 | |
| Shares in the equity pool available for future grants | 19,900,000 | |
| TBRSU Share Limit | 1 | |
| PBRSU Share Limit | 2 | 1.5 |