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Financial Instruments - Schedule of Information Related to the Potential Effect of Entity's Master Netting Agreements and Collateral Security Agreements (Details) - USD ($)
$ in Millions
 9 Months Ended
Jul. 31, 2025
Oct. 31, 2024
Derivative assets    
Gross Amount Recognized $ 134 $ 229
Gross Amount Offset 0 0
Net Amount Presented 134 229
Gross Amounts Not Offset    
Derivatives 128 113
Financial Collateral 0 88
Net Amount 6 28
Derivative liabilities    
Gross Amount Recognized 377 182
Gross Amount Offset 0 0
Net Amount Presented 377 182
Gross Amounts Not Offset    
Derivatives 128 113
Financial Collateral 343 61
Net Amount $ (94) $ 8
Period to collateralize 2 days