Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions	Total	Capital Stock and Additional Paid-in Capital	Deficit	Accumulated Other Comprehensive Loss
Beginning Balance at Feb. 28, 2021	$ 1,504	$ 2,823	$ (1,306)	$ (13)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(62)		(62)
Other comprehensive income (loss)	3			3
Stock-based compensation	7	7
Exercise of stock options	1	1
Employee share purchase plan	3	3
Ending Balance at May. 31, 2021	1,456	2,834	(1,368)	(10)
Beginning Balance at Feb. 28, 2022	1,556	2,869	(1,294)	(19)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(181)		(181)
Other comprehensive income (loss)	(1)			(1)
Stock-based compensation	8	8
Exercise of stock options	0	0
Employee share purchase plan	3	3
Ending Balance at May. 31, 2022	$ 1,385	$ 2,880	$ (1,475)	$ (20)