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INCOME TAXES (Deferred tax asset and Valuation allowance 2019 correction) (Details) - USD ($)
$ in Millions
Oct. 31, 2020
Oct. 31, 2019
Error Corrections and Prior Period Adjustments Restatement [Line Items]    
Net operating loss, capital loss, and credit carryforwards $ 286 $ 283
Tax valuation allowance 238 240
Total deferred tax assets $ 860 878
Revision of Prior Period, Error Correction, Adjustment [Member]    
Error Corrections and Prior Period Adjustments Restatement [Line Items]    
Net operating loss, capital loss, and credit carryforwards   167
Tax valuation allowance   167
Total deferred tax assets   $ 0