Commitments and Contingencies (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	May 31, 2020	Feb. 29, 2020
Loss Contingencies Line Items]
Collateral of outstanding letters of credit	$ 48
Executive Chair Grant Liability	2	$ 1
Funds from claim filed with Ministry of Innovation, Science and Economic Development Canada relating to Strategic Innovation Fund Program	12
Executive Chair and CEO [Member]
Loss Contingencies Line Items]
Contingent performance-based cash award	$ 90
10-day average closing price for cash award	$ 30
Expiry date of contingent performance-based cash award	Nov. 03, 2023