Fair Value Measurements - Financial Instruments Measured on Recurring Basis (Details) - Fair Value, Recurring - USD ($) $ in Millions	Apr. 30, 2021	Oct. 31, 2020
Assets
Total assets	$ 13	$ 9
Liabilities
Guarantees	22	29
Total liabilities	24	34
Level 1
Assets
Total assets	0	0
Liabilities
Guarantees	0	0
Total liabilities	0	0
Level 2
Assets
Total assets	13	9
Liabilities
Guarantees	0	0
Total liabilities	2	5
Level 3
Assets
Total assets	0	0
Liabilities
Guarantees	22	29
Total liabilities	22	29
Other Current Assets \| Commodity forward contracts
Assets
Derivative financial instruments, assets	11	4
Other Current Assets \| Commodity forward contracts \| Level 1
Assets
Derivative financial instruments, assets	0	0
Other Current Assets \| Commodity forward contracts \| Level 2
Assets
Derivative financial instruments, assets	11	4
Other Current Assets \| Commodity forward contracts \| Level 3
Assets
Derivative financial instruments, assets	0	0
Other Current Assets \| Foreign currency contracts
Assets
Derivative financial instruments, assets	2	5
Other Current Assets \| Foreign currency contracts \| Level 1
Assets
Derivative financial instruments, assets	0	0
Other Current Assets \| Foreign currency contracts \| Level 2
Assets
Derivative financial instruments, assets	2	5
Other Current Assets \| Foreign currency contracts \| Level 3
Assets
Derivative financial instruments, assets	0	0
Other Current Liabilities \| Commodity forward contracts
Liabilities
Derivative financial instruments, liabilities	0	2
Other Current Liabilities \| Commodity forward contracts \| Level 1
Liabilities
Derivative financial instruments, liabilities	0	0
Other Current Liabilities \| Commodity forward contracts \| Level 2
Liabilities
Derivative financial instruments, liabilities	0	2
Other Current Liabilities \| Commodity forward contracts \| Level 3
Liabilities
Derivative financial instruments, liabilities	0	0
Other Current Liabilities \| Foreign currency contracts
Liabilities
Derivative financial instruments, liabilities	2	3
Other Current Liabilities \| Foreign currency contracts \| Level 1
Liabilities
Derivative financial instruments, liabilities	0	0
Other Current Liabilities \| Foreign currency contracts \| Level 2
Liabilities
Derivative financial instruments, liabilities	2	3
Other Current Liabilities \| Foreign currency contracts \| Level 3
Liabilities
Derivative financial instruments, liabilities	$ 0	$ 0

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Fair value portion of guarantee, including, but not limited to, financial standby letter of credit, fair value guarantee, guarantee of collection of scheduled contractual cash flows from financial assets, and contracts that contingently require the guarantor to make payments or perform services.

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Fair value of financial and nonfinancial obligations.

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