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. 28, 2019	$ 2,636		$ 2,688		$ (32)		$ (20)
Beginning Balance (Accounting Standards Update 2016-02) at Feb. 28, 2019		$ (14)		$ 0		$ (14)		$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(35)				(35)
Other comprehensive income (loss)	(10)						(10)
Stock-based compensation	17		17
Exercise of stock options	1		1
Employee share purchase plan	2		2
Ending Balance at May. 31, 2019	2,597		2,708		(81)		(30)
Beginning Balance at Feb. 29, 2020	2,529		2,760		(198)		(33)
Beginning Balance (Accounting Standards Update 2016-13) at Feb. 29, 2020		$ (4)		$ 0		$ (4)		$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(636)				(636)
Other comprehensive income (loss)	7						7
Stock-based compensation	13		13
Exercise of stock options	1		1
Employee share purchase plan	3		3
Ending Balance at May. 31, 2020	$ 1,913		$ 2,777		$ (838)		$ (26)