Revenue and Segment Disclosures - Operating results by operating segments (Details) $ in Millions	3 Months Ended		9 Months Ended
	Nov. 30, 2021 USD ($)	Nov. 30, 2020 USD ($)	Nov. 30, 2021 USD ($) operatingSegment	Nov. 30, 2020 USD ($)
Segment Reporting [Abstract]
Number of Operating Segments | operatingSegment			3
Segment Reporting Information [Line Items]
Revenues	$ 184	$ 218	$ 533	$ 683
Cost of sales	67	69	190	192
Gross Profit	117	149	343	491
Cybersecurity
Segment Reporting Information [Line Items]
Revenues	128	130	355	369
Cost of sales	52	53	147	146
Gross Profit	76	77	208	223
IoT
Segment Reporting Information [Line Items]
Revenues	43	32	126	92
Cost of sales	8	6	22	18
Gross Profit	35	26	104	74
Licensing and Other
Segment Reporting Information [Line Items]
Revenues	13	56	52	222
Cost of sales	6	9	18	24
Gross Profit	7	47	34	198
Total Operating Segments
Segment Reporting Information [Line Items]
Revenues	184	218	533	683
Cost of sales	66	68	187	188
Gross Profit	$ 118	$ 150	$ 346	$ 495