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Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2021	Apr. 30, 2020
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ 259	$ (821)	$ 482	$ (488)
Change in net unrealized gains (losses) on available-for-sale securities:
Net unrealized gains (losses) arising during the period	(5)	(8)	(2)	(6)
(Gains) losses reclassified into earnings	0	(4)	0	(7)
Change in net unrealized gains (losses) on available-for-sale securities	(5)	(12)	(2)	(13)
Change in net unrealized gains (losses) on cash flow hedges:
Net unrealized gains (losses) arising during the period	45	296	(284)	371
Net (gains) losses reclassified into earnings	20	(214)	298	(283)
Change in net unrealized gains (losses) on cash flow hedges	65	82	14	88
Change in unrealized components of defined benefit plans:
Net unrealized gains (losses) arising during the period	23	(8)	23	9
Amortization of net actuarial loss and prior service benefit	71	61	142	122
Curtailments, settlements and other	1	1	2	1
Change in unrealized components of defined benefit plans	95	54	167	132
Change in cumulative translation adjustment	(3)	(43)	18	(47)
Other comprehensive income before taxes	152	81	197	160
(Provision) benefit for taxes	(18)	(6)	(20)	(15)
Other comprehensive income, net of taxes	134	75	177	145
Comprehensive income (loss)	$ 393	$ (746)	$ 659	$ (343)

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