Taxes on Earnings (Details) - USD ($) $ in Millions	12 Months Ended
Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Domestic and foreign components of earnings (loss) before taxes
U.S.	$ (1,067)	$ (2,805)	$ (1,929)
Non-U.S.	2,620	3,073	2,201
Earnings from continuing operations before taxes	1,553	268	272
U.S. federal taxes:
Current	(763)	(2,177)	560
Deferred	1,046	150	(1,366)
Non-U.S. taxes:
Current	246	419	64
Deferred	101	(188)	25
State taxes:
Current	(58)	52	(107)
Deferred	(68)	0	660
Provision for (benefit from) taxes on earnings	$ 504	$ (1,744)	$ (164)

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