Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
Statement of Comprehensive Income [Abstract]
Net (loss) earnings	$ (612)	$ 320	$ (345)	$ 587
Change in net unrealized (losses) gains on available-for-sale securities:
Net unrealized (losses) gains arising during the period	(4)	2	(17)	4
(Gains) losses reclassified into earnings	0	(5)	0	4
Change in unrealized gains on available for sale securities	(4)	(3)	(17)	8
Change in net unrealized losses on cash flow hedges:
Net unrealized gains (losses) arising during the period	4	(206)	140	(64)
Net gains reclassified into earnings	(83)	(70)	(246)	(191)
Change in unrealized gains on cash flow hedges	(79)	(276)	(106)	(255)
Change in unrealized components of defined benefit plans:
Gains (losses) arising during the period	11	(1)	490	(1)
Amortization of actuarial loss and prior service benefit	77	70	174	142
Curtailments, settlements and other	3	1	3	(17)
Change in unrealized components of defined benefit plans	91	70	667	124
Change in cumulative translation adjustment	(11)	57	(36)	(82)
Other comprehensive (loss) income before taxes	(3)	(152)	508	(205)
Benefit (provision) for taxes	4	77	(32)	53
Other comprehensive income (loss), net of taxes	1	(75)	476	(152)
Comprehensive (loss) income	$ (611)	$ 245	$ 131	$ 435