STOCKHOLDERS' EQUITY (Stock Repurchase Program) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018	May 29, 2019	Oct. 31, 2018
Treasury Stock Transactions, Excluding Value of Shares Reissued [Abstract]
Stock Repurchase Program, Authorized Amount					$ 500	$ 350
Treasury Stock, Shares, Acquired			1,790,420	1,441,610
Treasury Stock, Value, Acquired, Cost Method	$ 60	$ 40	$ 130	$ 80

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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