Consolidated Condensed Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 2018
Statement of Comprehensive Income [Abstract]
Net earnings	$ 782	$ 1,058	$ 1,585	$ 2,996
Change in unrealized components of available-for-sale debt securities:
Unrealized losses arising during the period	0	(2)	0	(5)
Losses (gains) reclassified into earnings	3	0	3	(5)
Change in unrealized components of available-for-sale securities	3	(2)	3	(10)
Change in unrealized components of cash flow hedges:
Unrealized gains (losses) arising during the period	198	297	91	(254)
Losses (gains) reclassified into earnings	6	276	(173)	346
Change in unrealized components of cash flow hedges	204	573	(82)	92
Change in unrealized components of defined benefit plans:
Losses arising during the period	(4)	0	(4)	0
Amortization of actuarial loss and prior service benefit	12	13	23	25
Settlements and other	1	0	(1)	1
Change in unrealized components of defined benefit plans	9	13	18	26
Change in cumulative translation adjustment	13	0	8	0
Other comprehensive income (loss) before taxes	229	584	(53)	108
Provision for taxes	(42)	(69)	(2)	(4)
Other comprehensive income (loss), net of taxes	187	515	(55)	104
Comprehensive income	$ 969	$ 1,573	$ 1,530	$ 3,100