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Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jul. 31, 2020
Jul. 31, 2019
Jul. 31, 2020
Jul. 31, 2019
Statement of Comprehensive Income [Abstract]        
Net earnings (loss) $ 9 $ (27) $ (479) $ 569
Change in net unrealized gains (losses) on available-for-sale securities:        
Net unrealized gains (losses) arising during the period 6 3 0 8
(Gains) losses reclassified into earnings (1) 0 (8) (3)
Change in net unrealized gains (losses) on available-for-sale securities 5 3 (8) 5
Change in net unrealized (losses) gains on cash flow hedges:        
Net unrealized (losses) gains arising during the period (456) 63 (85) 225
Net losses (gains) reclassified into earnings 242 (58) (41) (259)
Change in net unrealized gains (losses) on cash flow hedges (214) 5 (126) (34)
Change in unrealized components of defined benefit plans:        
Net unrealized (losses) gains arising during the period (19) (31) (10) (78)
Amortization of net actuarial loss and prior service benefit 61 54 183 161
Curtailments, settlements and other 7 5 8 12
Change in unrealized components of defined benefit plans 49 28 181 95
Change in cumulative translation adjustment 1 (8) (46) (2)
Other comprehensive (loss) income before taxes (159) 28 1 64
Benefit (provision) for taxes 28 2 13 4
Other comprehensive (loss) income, net of taxes (131) 30 14 68
Comprehensive (loss) income $ (122) $ 3 $ (465) $ 637