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INCOME TAXES INCOME TAXES - Uncertain Tax Positions (Details) - USD ($)
$ in Millions
 12 Months Ended
Oct. 31, 2019
Oct. 31, 2018
Oct. 31, 2017
Operating Loss Carryforwards [Line Items]      
Unrecognized tax benefit including interest and penalties $ 227    
Unrecognized Tax Benefits Rollforward      
Balance, beginning of year 214 $ 224 $ 293
Additions for tax positions related to the current year 7 27 32
Additions for tax positions from prior years 12 2 1
Reductions for tax positions from prior years 2 13 3
Settlements with taxing authorities 0 0 (52)
Statute of limitations expirations (25) (26) (47)
Balance, end of year 206 214 224
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense [Abstract]      
Interest and penalties accrued related to unrecognized tax benefits accrued and reported 36 27  
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 204    
Income tax expense (benefit) (152) 630 119
Unrecognized tax benefits that would not impact the effective tax rate 23    
Tax Interest and Penalties [Member]      
Operating Loss Carryforwards [Line Items]      
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense $ 9 $ 11 $ (9)