Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Statement of Comprehensive Income [Abstract]
Net earnings	$ 3,152	$ 5,327	$ 2,526
Change in unrealized components of available-for-sale debt securities:
Unrealized gains (losses) arising during the period	1	(3)	4
Losses (gains) reclassified into earnings	3	(5)	0
Change in unrealized components of available-for-sale securities	4	(8)	4
Change in unrealized components of cash flow hedges:
Unrealized gains (losses) arising during the period	252	341	(651)
(Gains) losses reclassified into earnings	(380)	258	199
Change in unrealized components of cash flow hedges:	(128)	599	(452)
Change in unrealized components of defined benefit plans:
(Losses) gains arising during the period	(303)	11	455
Amortization of actuarial loss and prior service benefit	43	48	74
Curtailments, settlements and other	42	3	3
Change in unrealized components of defined benefit plans	(218)	62	532
Change in cumulative translation adjustment	4	0	0
Other comprehensive (loss) income before taxes	(338)	653	84
Provision for taxes	(42)	(80)	(64)
Other comprehensive (loss) income, net of taxes	(380)	573	20
Comprehensive income	$ 2,772	$ 5,900	$ 2,546