Borrowings - Schedule of Notes Payable and Short-Term Borrowings (Details) - USD ($) $ in Millions	Jul. 31, 2019	Oct. 31, 2018
Amount Outstanding
Current portion of long-term debt	$ 295	$ 565
Amount outstanding	$ 328	$ 1,463
Weighted-Average Interest Rate
Current portion of long-term debt	3.60%	3.10%
Commercial paper
Amount Outstanding
Commercial paper	$ 0	$ 854
Weighted-Average Interest Rate
Notes payable to banks, lines of credit and other	0.00%	2.50%
Notes payable to banks, lines of credit and other
Amount Outstanding
Amount outstanding	$ 33	$ 44
Weighted-Average Interest Rate
Notes payable to banks, lines of credit and other	2.00%	1.70%

Debt Instrument, Interest Rate, Weighted Average Interest Rate [Abstract]

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- Definition

Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer.

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Weighted average interest rate of debt outstanding.

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Amount of long-term debt and lease obligation, classified as current.

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19)(a))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16)(a)(1))
-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(13))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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Weighted average interest rate of short-term debt outstanding calculated at point in time.

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