Cash, Cash Equivalents and Short-Term Investments (Details 2) $ in Millions	Feb. 28, 2020 USD ($)
Amortized cost of short-term fixed income securities
Due within one year, Amortized Cost	$ 922
Due between one and two years, Amortized Cost	364
Due between two and three years, Amortized Cost	188
Total, Amortized Cost	1,474
Estimated fair value of short-term fixed income securities
Due within one year, Estimated Fair value	925
Due between one and two years, Estimated Fair value	367
Due between two and three years, Estimated Fair value	191
Total, Estimated Fair value	$ 1,483

Amortized cost of short-term fixed Income Securities [Abstract]

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Available-for-sale Securities, Debt Maturities, Next One to Two Years, Amortized Cost Basis

+ References

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Available-for-sale Securities, Debt Maturities, Next One to Two Years, Fair Value

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- Definition

Available-for-sale Securities, Debt Maturities, Next Two to Three Years, Amortized Cost Basis

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Available-for-sale Securities, Debt Maturities, Next Two to Three Years, Fair Value

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Estimated Fair Value of Short-term fixed Income Securities [Abstract]

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- Definition

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
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-Publisher FASB
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Amortized cost of investment in debt security measured at fair value with change recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), maturing in next fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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-Publisher FASB
-Name Accounting Standards Codification
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