Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (1,104)	$ (152)	$ 93
Other comprehensive income (loss)
Net change in unrealized gains (losses) on available-for-sale investments	0	(2)	1
Net change in fair value and amounts reclassified to net loss from derivatives designated as cash flow hedges during the year (note 10)	2	(1)	1
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	5	(3)	(6)
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Unrealized Gain (Loss) Arising During Period, after Tax	13	(7)	0
Other comprehensive income (loss)	20	(13)	(4)
Comprehensive income (loss)	$ (1,084)	$ (165)	$ 89