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Taxes on Earnings - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Millions
Jan. 31, 2020
Oct. 31, 2019
Income Tax Disclosure [Abstract]    
Deferred tax assets $ 1,529 $ 1,515
Deferred tax liabilities (311) (311)
Deferred tax assets net of deferred tax liabilities $ 1,218 $ 1,204