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Taxes on Earnings - Schedule of Current and Long-term Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Millions
Oct. 31, 2018
Oct. 31, 2017
Income Tax Disclosure [Abstract]    
Long-term deferred tax assets $ 2,431 $ 342
Long-term deferred tax liabilities (100) (1,410)
Total $ 2,331  
Total   $ (1,068)