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Financial Instruments - Contractual Maturities of Investments in Available-for-Sale Debt Securities (Details) - USD ($) $ in Millions	Oct. 31, 2021	Oct. 31, 2020
Amortized Cost
Due in one to five years	$ 26
Due in more than five years	123
Debt securities, amortized cost	149	$ 128
Fair Value
Due in one to five years	26
Due in more than five years	138
Fair Value	$ 164	$ 146

X

- Definition

Amortized Cost of available-for-sale debt securities, maturing after the fifth fiscal year following the latest fiscal year.

+ References

No definition available.

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- Definition

Fair value of available-for-sale debt securities, maturing after the fifth fiscal year following the latest fiscal year.

+ References

No definition available.

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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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-Section 45
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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), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

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-Topic 320
-SubTopic 10
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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), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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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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