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Taxes on Earnings - Schedule of Deferred Tax Assets for Various Tax Credit Carryforwards (Details)
$ in Millions
Oct. 31, 2018
USD ($)
Carryforward  
U.S. foreign tax credits $ 7
U.S. R&D and other credits 3
Tax credits in state and foreign jurisdictions 313
Balance at end of year 323
Valuation Allowance  
Valuation Allowance (94)
U.S. foreign tax credits  
Valuation Allowance  
Valuation Allowance 0
U.S. R&D and other credits  
Valuation Allowance  
Valuation Allowance 0
Tax credits in state and foreign jurisdictions  
Valuation Allowance  
Valuation Allowance $ (94)