Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ 165	$ 2,272	$ (180)	$ 2,859
Change in net unrealized gains (losses) on available-for-sale securities:
Net unrealized gains (losses) arising during the period	7	7	(10)	11
(Gains) losses reclassified into earnings	0	(1)	0	3
Change in net unrealized gains (losses) on available-for-sale securities	7	6	(10)	14
Change in net unrealized (losses) gains on cash flow hedges:
Net unrealized (losses) gains arising during the period	(133)	172	7	108
Net losses (gains) reclassified into earnings	15	(19)	(231)	(210)
Change in net unrealized (losses) gains on cash flow hedges	(118)	153	(224)	(102)
Change in unrealized components of defined benefit plans:
Gains (losses) arising during the period	210	(13)	700	(14)
Amortization of actuarial loss and prior service benefit	56	72	230	214
Curtailments, settlements and other	6	1	9	(16)
Change in unrealized components of defined benefit plans	272	60	939	184
Change in cumulative translation adjustment	49	(183)	13	(265)
Other comprehensive income (loss) before taxes	210	36	718	(169)
(Provision) benefit for taxes	(26)	(46)	(58)	7
Other comprehensive income (loss), net of taxes	184	(10)	660	(162)
Comprehensive income	$ 349	$ 2,262	$ 480	$ 2,697