Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Aug. 31, 2021	Aug. 31, 2020	Aug. 31, 2021	Aug. 31, 2020
Statement of Comprehensive Income [Abstract]
Net loss	$ (144)	$ (23)	$ (206)	$ (659)
Other comprehensive income (loss)
Net change in fair value and amounts reclassified to net loss from derivatives designated as cash flow hedges during the period, net of income taxes of nil for the three and six months ended August 31, 2021 and August 31, 2020 (note 9)	(2)	4	(1)	3
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(3)	2	(2)	3
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Unrealized Gain (Loss) Arising During Period, after Tax	0	7	1	14
Other comprehensive income (loss)	(5)	13	(2)	20
Comprehensive loss	$ (149)	$ (10)	$ (208)	$ (639)