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Stockholders' Equity (Details) - USD ($)
$ in Millions
12 Months Ended
Oct. 31, 2018
Oct. 31, 2017
Oct. 31, 2016
Taxes on change in net unrealized losses on available-for-sale securities:      
Tax (provision) benefit on net unrealized losses arising during the period $ 0 $ (2) $ 2
Tax provision (benefit) on (gains) losses reclassified into earnings 0 1 (2)
Taxes effect on change in unrealized (losses) gains on available-for-sales securities 0 (1) 0
Taxes on change in net unrealized gains (losses) on cash flow hedges:      
Tax (provision) benefit on net unrealized gains arising during the period (22) 6 (14)
Tax (benefit) provision on net losses (gains) reclassified into earnings (1) 10 25
Taxes effect on change in unrealized gains (losses) on cash flow hedges (23) 16 11
Taxes on change in unrealized components of defined benefit plans:      
Tax benefit (provision) on (losses) gains arising during the period 2 (49) 63
Tax provision on amortization of actuarial loss and prior service benefit (14) (19) (20)
Tax provision on curtailments, settlements and other (10) (91) (1)
Tax effect on change in unrealized components of defined benefit plans (22) (159) 42
Tax on cumulative translation adjustment arising during the period 3 (1) 20
Tax on release of cumulative translation adjustment as a result of divestitures 0 0 (22)
Taxes on change in cumulative translation adjustment: 3 (1) (2)
Tax (provision) benefit on other comprehensive (loss) income (42) (145) 51
Changes and reclassifications related to Other Comprehensive (Loss) Income, net of taxes      
Other comprehensive (loss) income, net of taxes (137) 974 (1,584)
Cumulative translation adjustment arising during the period (67) (15) (134)
Release of cumulative translation adjustment as a result of divestitures and country exits 20 0 53
Change in foreign currency translation adjustment (47) (15) (81)
Change in net unrealized (losses) gains on available-for-sale securities:      
Changes and reclassifications related to Other Comprehensive (Loss) Income, net of taxes      
Other comprehensive (loss) income before reclassifications (3) (10) (2)
Reclassifications of (gains) losses into earnings (9)    
Other comprehensive (loss) income, net of taxes (12) (13) (1)
Change in net unrealized (losses) gains on available-for-sale securities: | Reclassifications of losses (gains) into earnings      
Changes and reclassifications related to Other Comprehensive (Loss) Income, net of taxes      
Reclassifications of (gains) losses into earnings (9) (3) 1
Net unrealized gains (losses) on cash flow hedges      
Changes and reclassifications related to Other Comprehensive (Loss) Income, net of taxes      
Other comprehensive (loss) income before reclassifications 147 52 212
Reclassifications of (gains) losses into earnings 7    
Other comprehensive (loss) income, net of taxes 154 (83) (33)
Net unrealized gains (losses) on cash flow hedges | Reclassifications of losses (gains) into earnings      
Changes and reclassifications related to Other Comprehensive (Loss) Income, net of taxes      
Reclassifications of (gains) losses into earnings 7 (135) (245)
Change in unrealized components of defined benefit plans:      
Changes and reclassifications related to Other Comprehensive (Loss) Income, net of taxes      
Other comprehensive (loss) income before reclassifications (421)    
Reclassifications of (gains) losses into earnings 189    
Other comprehensive (loss) income, net of taxes (232) 1,085 (1,469)
Losses arising during the period      
Changes and reclassifications related to Other Comprehensive (Loss) Income, net of taxes      
Other comprehensive (loss) income before reclassifications (421) 895 (1,714)
Amortization of actuarial loss and prior service benefit | Reclassifications of losses (gains) into earnings      
Changes and reclassifications related to Other Comprehensive (Loss) Income, net of taxes      
Reclassifications of (gains) losses into earnings 177 266 264
Curtailments, settlements and other      
Changes and reclassifications related to Other Comprehensive (Loss) Income, net of taxes      
Other comprehensive (loss) income, net of taxes 12 $ (76) $ (19)
Cumulative translation adjustment      
Changes and reclassifications related to Other Comprehensive (Loss) Income, net of taxes      
Other comprehensive (loss) income before reclassifications (67)    
Reclassifications of (gains) losses into earnings $ 20