Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Statement of Comprehensive Income [Abstract]
Net earnings	$ 2,526	$ 2,496	$ 4,554
Change in unrealized components of available-for-sale securities:
Unrealized gains (losses) arising during the period	4	1	(17)
Change in unrealized components of cash flow hedges:
Unrealized (losses) gains arising during the period	(651)	199	1,091
Losses (gains) reclassified into earnings	199	63	(1,312)
Change in unrealized components of cash flow hedges:	(452)	262	(221)
Change in unrealized components of defined benefit plans:
Gains (losses) arising during the period	455	(759)	(548)
Amortization of actuarial loss and prior service benefit	74	51	443
Curtailments, settlements and other	3	183	115
Change in unrealized components of defined benefit plans	532	(525)	10
Change in cumulative translation adjustment	0	0	(207)
Other comprehensive income (loss) before taxes	84	(262)	(435)
(Provision for) benefit from taxes	(64)	45	14
Other comprehensive loss, net of taxes	20	(217)	(421)
Comprehensive income	$ 2,546	$ 2,279	$ 4,133