Taxes on Earnings (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Domestic and foreign components of earnings (loss) before taxes
U.S.	$ (1,098)	$ (1,144)	$ 288
Non-U.S.	1,370	5,004	1,647
Earnings from continuing operations before taxes	272	3,860	1,935
U.S. federal taxes:
Current	560	940	1,640
Deferred	(1,366)	(959)	(2,610)
Non-U.S. taxes:
Current	64	874	313
Deferred	25	(58)	60
State taxes:
Current	(107)	36	45
Deferred	660	(210)	(153)
Provision for (benefit from) taxes on earnings	$ (164)	$ 623	$ (705)