Financial Instruments - Narrative (Details) - USD ($)	9 Months Ended
	Jul. 31, 2021	Jun. 30, 2021	Oct. 31, 2020
Derivatives, Fair Value
Fair value of derivatives with credit contingent features in a net liability position	$ 95,000,000		$ 90,000,000
Period to collateralize	2 days
Notional amount	$ 23,955,000,000		21,997,000,000
Loss expected to be reclassified from Accumulated OCI into earnings in next 12 months	40,000,000
$1,150 issued at discount to par at a price of 99.769% in June 2020 at 2.2%, due June 2025
Derivatives, Fair Value
Face amount of debt instrument	1,150,000,000
Interest Rate Swap
Derivatives, Fair Value
Derivative terminated, notional amount	500,000,000
Derivative settlement, notional amount	250,000,000
Fair value hedges | Interest Rate Swap
Derivatives, Fair Value
Notional amount	$ 375,000,000
Cash flow hedges
Derivatives, Fair Value
Foreign currency maturity	12 months
Cash flow hedges | Forward Contracts
Derivatives, Fair Value
Notional amount	$ 1,750,000,000
Derivative settlement, notional amount		$ 750,000,000
Other Non-Current Assets | Equity securities in privately held companies
Derivatives, Fair Value
Cost method and other equity investments	$ 53,000,000		$ 44,000,000