Consolidated and Combined Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Statement of Comprehensive Income [Abstract]
Net earnings	$ 3,161	$ 2,461	$ 1,648
Change in net unrealized (losses) gains on available-for-sale securities:
Net unrealized (losses) gains arising during the period	(4)	(10)	5
Losses (gains) reclassified into earnings	3	0	(1)
Change in unrealized (losses) gains on available-for-sale securities	(1)	(10)	4
Change in net unrealized (losses) gains on cash flow hedges:
Net unrealized gains arising during the period	226	481	111
Net (gains) losses reclassified into earnings	(270)	(480)	60
Change in unrealized gains (losses) on cash flow hedges	(44)	1	171
Change in unrealized components of defined benefit plans:
Losses arising during the period	(1,777)	(382)	(794)
Amortization of actuarial loss and prior service benefit	284	214	82
Curtailments, settlements and other	(18)	4	18
Plans transferred from former Parent during the period	0	(2,607)	0
Merged into former Parent's Shared plans during the period	0	0	61
Change in unrealized components of defined benefit plans	(1,511)	(2,771)	(633)
Cumulative translation adjustment arising during the period	(154)	(198)	(85)
Cumulative translation adjustment arising during the period	75	0	0
Change in foreign currency translation adjustment	(79)	(198)	(85)
Other comprehensive loss before taxes	(1,635)	(2,978)	(543)
Benefit (provision) for taxes	51	211	(10)
Other comprehensive loss, net of taxes	(1,584)	(2,767)	(553)
Comprehensive income (loss)	$ 1,577	$ (306)	$ 1,095