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SHORT-TERM DEBT - Credit Facility (Details) - USD ($) $ in Millions			3 Months Ended	9 Months Ended
	Jul. 31, 2020	Mar. 13, 2019	Jul. 31, 2020	Jul. 31, 2020	Jul. 31, 2019	May 26, 2020
Short-term Debt
Proceeds from Lines of Credit				$ 798	$ 0
Revolving Credit Facility
Short-term Debt
Initiation date of credit facility		Mar. 13, 2019
Maximum borrowing capacity of credit facility		$ 1,000
Credit faciity terms (in years)		five
Expiration date of credit facility		Mar. 13, 2024
Proceeds from Lines of Credit			$ 798
Repayments of revolving credit facility			913
Amount outstanding on credit facility	$ 0		0	0
Revolving Credit Facility | Incremental Short-Term Loan Facility
Short-term Debt
Maximum borrowing capacity of credit facility	500		500	500
Repayments of Short-term Debt				500
Revolving Credit Facility | Additional Incremental Short-Term Loan Facility
Short-term Debt
Maximum borrowing capacity of credit facility	500		500	500
Amount outstanding on credit facility	0		0	0
Commercial Paper
Short-term Debt
Maximum borrowing capacity of credit facility						$ 1,000
Amount outstanding on credit facility	$ 40		$ 40	$ 40
Weighted Average Interest Rate, at Point in Time	0.23%		0.23%	0.23%
Weighted Average Maturity Date at Point in Time	3 years

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Weighted Average Maturity Date at Point in Time.

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Date the credit facility terminates, in CCYY-MM-DD format.

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Fair value of the amount outstanding under the credit facility.

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Date the credit facility first became available, in CCYY-MM-DD format.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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The cash outflow for a borrowing having initial term of repayment within one year or the normal operating cycle, if longer.

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Description of the short-term debt arrangement, and disclosures pertaining to the underlying arrangements, including repayment terms, interest rates, restrictions on assets and activities, debt covenants, and other matters important to users of the financial statements.

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

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