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Consolidated Condensed Statements of Comprehensive Income (Unaudited) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jul. 31, 2017
Jul. 31, 2016
Jul. 31, 2017
Jul. 31, 2016
Statement of Comprehensive Income [Abstract]        
Net earnings $ 696 $ 783 $ 1,866 $ 2,004
Change in unrealized gains on available-for-sale securities:        
Gains arising during the period 1 1 5 2
Change in unrealized components of cash flow hedges:        
(Losses) gains arising during the period (519) 175 (758) 135
Losses (gains) reclassified into earnings 38 159 (49) 63
Change in unrealized components of cash flow hedges (481) 334 (807) 198
Change in unrealized components of defined benefit plans:        
Gains (losses) arising during the period 0 0 13 (4)
Amortization of actuarial loss and prior service benefit 19 12 56 36
Settlements and other 0 0 3 1
Change in unrealized components of defined benefit plans 19 12 72 33
Other comprehensive (loss) income before taxes (461) 347 (730) 233
Benefit (provision) for taxes 57 (28) 50 41
Other comprehensive (loss) income, net of taxes (404) 319 (680) 274
Comprehensive income $ 292 $ 1,102 $ 1,186 $ 2,278