Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ 392	$ 9	$ 874	$ (479)
Change in net unrealized gains (losses) on available-for-sale securities:
Net unrealized gains (losses) arising during the period	1	6	(1)	0
(Gains) losses reclassified into earnings	0	(1)	0	(8)
Change in net unrealized gains (losses) on available-for-sale securities	1	5	(1)	(8)
Change in net unrealized gains (losses) on cash flow hedges:
Net unrealized gains (losses) arising during the period	101	(456)	(183)	(85)
Net (gains) losses reclassified into earnings	(36)	242	262	(41)
Change in net unrealized gains (losses) on cash flow hedges	65	(214)	79	(126)
Change in unrealized components of defined benefit plans:
Net unrealized gains (losses) arising during the period	6	(19)	29	(10)
Amortization of net actuarial loss and prior service benefit	70	61	212	183
Curtailments, settlements and other	0	7	2	8
Change in unrealized components of defined benefit plans	76	49	243	181
Change in cumulative translation adjustment	2	1	20	(46)
Other comprehensive income (loss) before taxes	144	(159)	341	1
(Provision) benefit for taxes	(13)	28	(33)	13
Other comprehensive income (loss), net of taxes	131	(131)	308	14
Comprehensive income (loss)	$ 523	$ (122)	$ 1,182	$ (465)