Consolidated Condensed Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Statement of Comprehensive Income [Abstract]
Net earnings	$ 880	$ 696	$ 3,876	$ 1,866
Change in unrealized components of available-for-sale securities:
Unrealized gains (losses) arising during the period	2	1	(3)	5
Gains reclassified into earnings	0	0	(5)	0
Change in unrealized components of available-for-sale securities	2	1	(8)	5
Change in unrealized components of cash flow hedges:
Unrealized gains (losses) arising during the period	273	(519)	19	(758)
Losses (gains) reclassified into earnings	17	38	363	(49)
Change in unrealized components of cash flow hedges	290	(481)	382	(807)
Change in unrealized components of defined benefit plans:
Gains arising during the period	2	0	2	13
Amortization of actuarial loss and prior service benefit	11	19	36	56
Curtailments, settlements and other	1	0	2	3
Change in unrealized components of defined benefit plans	14	19	40	72
Other comprehensive income (loss) before taxes	306	(461)	414	(730)
(Provision for) benefit from taxes	(31)	57	(35)	50
Other comprehensive income (loss), net of taxes	275	(404)	379	(680)
Comprehensive income	$ 1,155	$ 292	$ 4,255	$ 1,186