Consolidated Condensed Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Statement of Comprehensive Income [Abstract]
Net earnings	$ 764	$ 782	$ 1,442	$ 1,585
Change in unrealized components of available-for-sale debt securities:
Unrealized losses arising during the period	(2)	0	(1)	0
Losses reclassified into earnings	0	3	0	3
Change in unrealized components of available-for-sale securities	(2)	3	(1)	3
Change in unrealized components of cash flow hedges:
Unrealized gains arising during the period	231		291
Unrealized gains arising during the period		198		91
(Gains) losses reclassified into earnings	(53)		(112)
(Gains) losses reclassified into earnings		6		(173)
Change in unrealized components of cash flow hedges	178		179
Change in unrealized components of cash flow hedges		204		(82)
Change in unrealized components of defined benefit plans:
Losses arising during the period	(1)	(4)	(1)	(4)
Amortization of actuarial loss and prior service benefit	21	12	41	23
Curtailments, settlements and other	1	1	1	(1)
Change in unrealized components of defined benefit plans	21	9	41	18
Change in cumulative translation adjustment	(17)	13	(11)	8
Other comprehensive income (loss) before taxes	180	229	208	(53)
Provision for taxes	(22)	(42)	(33)	(2)
Other comprehensive income (loss), net of taxes	158	187	175	(55)
Comprehensive income	$ 922	$ 969	$ 1,617	$ 1,530