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Revenue and Segment Disclosures - Operating results by operating segments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Nov. 30, 2025	Nov. 30, 2024	Nov. 30, 2025	Nov. 30, 2024
Segment Reporting Information [Line Items]
Revenues	$ 141.8	$ 143.6	$ 393.1	$ 393.2
Cost of sales	31.9	31.4	96.3	102.4
Segment gross margin	109.9	112.2	296.8	290.8
QNX
Segment Reporting Information [Line Items]
Revenues	68.7	62.3	189.3	170.2
Cost of sales	11.3	8.9	33.2	27.7
Segment gross margin	57.4	53.4	156.1	142.5
Secure Communication
Segment Reporting Information [Line Items]
Revenues	67.0	74.6	186.4	205.3
Cost of sales	18.6	20.3	56.9	68.2
Segment gross margin	48.4	54.3	129.5
Segment gross margin				137.1
Licensing
Segment Reporting Information [Line Items]
Revenues	6.1	6.7	17.4	17.7
Cost of sales	1.5	1.5	4.6	4.5
Segment gross margin				13.2
Segment gross margin	4.6	5.2	12.8
Total Operating Segments
Segment Reporting Information [Line Items]
Revenues	141.8	143.6	393.1	393.2
Segment gross margin	$ 110.4	$ 112.9	$ 298.4	$ 292.8

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