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Revenue and Segment Disclosures - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Nov. 30, 2025
Nov. 30, 2024
Nov. 30, 2025
Nov. 30, 2024
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Segment gross margin $ 109.9 $ 112.2 $ 296.8 $ 290.8
Research and development 29.6 27.9 80.2 85.6
Selling and Marketing Expense 29.3 23.4 82.4 68.5
General and Administrative Expense 36.1 36.4 98.1 109.5
Amortization 2.4 4.4 9.5 13.7
Impairment of long-lived assets (note 3) 0.6 0.6 1.2 4.7
Investment income (loss), net (note 3 and note 6) 2.9 (0.6) 7.7 6.1
Income before income tax 14.8 18.9 33.1 14.9
Total Operating Segments        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Segment gross margin 110.4 112.9 298.4 292.8
Segment Reconciling Items        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Segment Reporting, Reconciling Item, Stock Compensation [1] 0.5 0.7 1.6 2.0
Investment income (loss), net (note 3 and note 6) $ 2.9 $ (0.6) $ 7.7 $ 6.1
[1] The CODM reviews segment adjusted gross margin information on an adjusted basis, which excludes Stock compensation expenses - a non-cash expense that is not included in the CODM’s measure of segment adjusted gross margin when evaluating performance and allocating resources to the segment.