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Cash, Cash Equivalents and Investments - Contractual Maturities of Available-for-Sale Investments (Details) - USD ($)
$ in Millions
Nov. 30, 2021
Feb. 28, 2021
Cost Basis    
Due in one year or less $ 632 $ 599
No fixed maturity 10 10
Total 642 609
Fair Value    
Due in one year or less 632 599
No fixed maturity 1 3
Total $ 633 $ 602