Borrowings - Schedule of Notes Payable and Short-Term Borrowings (Details) - USD ($) $ in Millions	Jul. 31, 2017	Oct. 31, 2016
Amount Outstanding
Current portion of long-term debt	$ 92	$ 51
Amount outstanding	$ 1,062	$ 78
Weighted-Average Interest Rate
Current portion of long-term debt	3.50%	4.10%
Commercial paper
Amount Outstanding
Commercial paper	$ 936	$ 0
Weighted-Average Interest Rate
Notes payable to banks, lines of credit and other	1.60%	0.00%
Notes payable to banks, lines of credit and other
Amount Outstanding
Amount outstanding	$ 34	$ 27
Weighted-Average Interest Rate
Notes payable to banks, lines of credit and other	1.40%	2.00%