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FAIR VALUE MEASUREMENTS FAIR VALUE MEASUREMENTS (Net recognized gains losses on equity securities) (Details) - USD ($)
$ in Millions
3 Months Ended
Jan. 31, 2023
Jan. 31, 2022
Debt and Equity Securities, Gain (Loss) [Abstract]    
Equity Securities, FV-NI, Realized Gain $ 0 $ 0
Equity Securities, FV-NI, Unrealized Gain (Loss) $ 8 $ (4)