Cash, Cash Equivalents and Investments - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	May 31, 2020	May 31, 2019	Feb. 29, 2020
Cash and Cash Equivalents [Line Items]
Investments that are communicated to the third party for consideration of reasonableness, threshold limit for fair values	0.50%
Equity Investment without Readily Determinable Fair Value	$ 33		$ 32
Available-for-sale Securities, Gross Realized Losses	0	$ 0
Investments with continuous unrealized losses	$ 8	$ 10
Minimum
Cash and Cash Equivalents [Line Items]
Lease term	1 month
Maximum
Cash and Cash Equivalents [Line Items]
Lease term	5 years