Revenue and Segment Disclosures - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Nov. 30, 2021	Nov. 30, 2020	Nov. 30, 2021	Nov. 30, 2020	Feb. 28, 2021
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Gross Profit	$ 117	$ 149	$ 343	$ 491
Cost of sales	67	69	190	192
Research and development	57	53	172	167
Selling, marketing and administration	77	83	233	252
Amortization	42	45	133	137
Impairment of long-lived assets	0	0	0	21
Impairment of goodwill	0	0	0	594	$ 594
Debentures fair value adjustment	(110)	95	(47)	114
Investment income (loss), net (note 3 and note 6)	25	(1)	22	(6)
Income (loss) before income taxes	76	(128)	(126)	(800)
Total Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Gross Profit	118	150	346	495
Cost of sales	66	68	187	188
Segment Reconciling Items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Cost of sales	1	1	3	4
Investment income (loss), net (note 3 and note 6)	$ 25	$ (1)	$ 22	$ (6)