Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment	Capital Stock and Additional Paid-in Capital	Capital Stock and Additional Paid-in Capital Cumulative Effect, Period of Adoption, Adjustment	Deficit	Deficit Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Cumulative Effect, Period of Adoption, Adjustment
Beginning Balance at Feb. 29, 2020	$ 2,529		$ 2,760		$ (198)		$ (33)
Beginning Balance (Accounting Standards Update 2016-13) at Feb. 29, 2020		$ (4)
Beginning Balance (Accounting Standards Update 2016-02) at Feb. 29, 2020		$ (4)		$ 0		$ (4)		$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(659)				(659)
Other comprehensive income (loss)	20						20
Stock-based compensation	22		22
Exercise of stock options	3		3
Employee share purchase plan	3		3
Ending Balance at Aug. 31, 2020	1,914		2,788		(861)		(13)
Beginning Balance at May. 31, 2020	1,913		2,777		(838)		(26)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(23)				(23)
Other comprehensive income (loss)	13						13
Stock-based compensation	9		9
Exercise of stock options	2		2
Ending Balance at Aug. 31, 2020	1,914		2,788		(861)		(13)
Beginning Balance at Feb. 28, 2021	1,504		2,823		(1,306)		(13)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(206)				(206)
Other comprehensive income (loss)	(2)						(2)
Stock-based compensation	17		17
Exercise of stock options	2		2
Employee share purchase plan	3		3
Ending Balance at Aug. 31, 2021	1,318		2,845		(1,512)		(15)
Beginning Balance at May. 31, 2021	1,456		2,834		(1,368)		(10)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(144)				(144)
Other comprehensive income (loss)	(5)						(5)
Stock-based compensation	10		10
Exercise of stock options	1		1
Ending Balance at Aug. 31, 2021	$ 1,318		$ 2,845		$ (1,512)		$ (15)