Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Statement of Comprehensive Income [Abstract]
Net earnings	$ 1,908	$ 344	$ 3,161
Change in net unrealized losses on available-for-sale securities:
Net unrealized losses arising during the period	(3)	(8)	(4)
(Gains) losses reclassified into earnings	(9)	(4)	3
Change in unrealized (losses) gains on available-for-sale securities	(12)	(12)	(1)
Change in net unrealized gains (losses) on cash flow hedges:
Net unrealized gains arising during the period	169	46	226
Net losses (gains) reclassified into earnings	8	(145)	(270)
Change in unrealized gains (losses) on cash flow hedges	177	(99)	(44)
Change in unrealized components of defined benefit plans:
(Losses) gains arising during the period	(423)	944	(1,777)
Amortization of actuarial loss and prior service benefit	191	285	284
Curtailments, settlements and other	22	15	(18)
Change in unrealized components of defined benefit plans	(210)	1,244	(1,511)
Cumulative translation adjustment arising during the period	(70)	(14)	(154)
Release of cumulative translation adjustment as a result of divestitures and country exits	20	0	75
Change in foreign currency translation adjustment	(50)	(14)	(79)
Other comprehensive (loss) income before taxes	(95)	1,119	(1,635)
(Provision) benefit for taxes	(42)	(145)	51
Other comprehensive (loss) income, net of taxes	(137)	974	(1,584)
Comprehensive income	$ 1,771	$ 1,318	$ 1,577