Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Feb. 29, 2020	Feb. 28, 2019	Feb. 28, 2018
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (152)	$ 93	$ 405
Other comprehensive income (loss)
Net change in unrealized gains (losses) on available-for-sale investments	(2)	1	(3)
Net changes in fair value and amounts reclassified to net income (loss) from derivatives designated as cash flow hedges during the year	(1)	1	(1)
Foreign currency translation adjustment	(3)	(6)	12
Actuarial losses associated with other post-employment benefit obligations	0	0	(1)
Debenture fair value adjustment from instrument-specific credit components recorded in other comprehensive income (loss) - income (charge)	(7)	0	0
Other comprehensive income (loss)	(13)	(4)	7
Comprehensive income (loss)	$ (165)	$ 89	$ 412