Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent Presented in the Consolidated Statements of Cash Flow (Details) - USD ($) $ in Millions	Aug. 31, 2021	Feb. 28, 2021	Aug. 31, 2020	Feb. 29, 2020
Cash and Cash Equivalents [Abstract]
Cash and cash equivalents (note 3)	$ 291	$ 214
Restricted Cash Equivalents	27	4
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Total	$ 318	$ 218	$ 886	$ 426

Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as noncurrent. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Name:	us-gaap_RestrictedCashAndCashEquivalentsNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant