Revenue and Segment Disclosures - Operating results by operating segments (Details) $ in Millions	12 Months Ended
	Feb. 28, 2025 USD ($) operatingSegment	Feb. 29, 2024 USD ($)	Feb. 28, 2023 USD ($)
Segment Reporting Information [Line Items]
Revenues	$ 534.9	$ 759.1	$ 526.3
Cost of Revenue	140.0	268.4	159.7
Gross Profit	$ 394.9	490.7	366.6
Number of Operating Segments | operatingSegment	3
Secure Communications
Segment Reporting Information [Line Items]
Revenues	$ 272.6	283.8	288.2
Cost of Revenue	92.7	80.7	110.4
Segment gross margin	179.9	203.1
Gross Profit			177.8
QNX
Segment Reporting Information [Line Items]
Revenues	236.0	215.4	205.7
Cost of Revenue	38.8	33.8	34.8
Gross Profit	197.2	181.6	170.9
Licensing
Segment Reporting Information [Line Items]
Revenues	26.3	259.9	32.4
Cost of Revenue	6.1	150.9	11.5
Segment gross margin		109.0	20.9
Gross Profit	20.2
Operating Segments
Segment Reporting Information [Line Items]
Revenues	534.9	759.1	526.3
Cost of Revenue	137.6	265.4	156.7
Gross Profit	$ 397.3	$ 493.7	$ 369.6