INVESTMENTS Available for sale investments fair value reconciliation (Details) - USD ($)
$ in Millions
Apr. 30, 2017
Oct. 31, 2016
Short-term Investments [Abstract]    
Available-for-sale Debt Securities, Amortized Cost Basis $ 40 $ 0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax 0 0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax 0 0
Available-for-sale Securities, Debt Securities 40 0
Long-term Investments [Abstract]    
Available-for-sale Equity Securities, Amortized Cost Basis 15 15
Available-for-sale Equity Securities, Accumulated Gross Unrealized Gain, before Tax 17 14
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax 0 0
Available-for-sale Securities, Equity Securities 32 29
US Treasury and Government [Member]    
Short-term Investments [Abstract]    
Available-for-sale Debt Securities, Amortized Cost Basis 26 0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax 0 0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax 0 0
Available-for-sale Securities, Debt Securities 26 0
Corporate Debt Securities [Member]    
Short-term Investments [Abstract]    
Available-for-sale Debt Securities, Amortized Cost Basis 14 0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax 0 0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax 0 0
Available-for-sale Securities, Debt Securities 14 0
Equity Securities [Member]    
Long-term Investments [Abstract]    
Available-for-sale Equity Securities, Amortized Cost Basis 15 15
Available-for-sale Equity Securities, Accumulated Gross Unrealized Gain, before Tax 17 14
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax 0 0
Available-for-sale Securities, Equity Securities $ 32 $ 29