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Stockholders' Equity - Reclassifications (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jul. 31, 2016
Jul. 31, 2015
Jul. 31, 2016
Jul. 31, 2015
Taxes on change in net unrealized gains (losses) on available-for-sale securities:        
Tax provision on net unrealized gains (losses) arising during the period $ 0 $ (4) $ (1) $ 0
Tax benefit on (gains) losses reclassified into earnings 0 0 (2) 0
Taxes effect on change in unrealized gains on available-for-sales securities 0 (4) (3) 0
Taxes on change in net unrealized gains (losses) on cash flow hedges:        
Tax (provision) benefit on net unrealized gains arising during the period (23) (32) 8 (64)
Tax (benefit) provision on net gains reclassified into earnings (6) 7 19 61
Taxes effect on change in unrealized losses on cash flow hedges (29) (25) 27 (3)
Taxes on change in unrealized components of defined benefit plans:        
Tax benefit on losses arising during the period 2 0 2 0
Tax benefit on amortization of actuarial loss and prior service benefit (5) (3) (15) (7)
Tax provision on curtailments, settlements and other (7) 0 (19) 0
Tax effect on change in unrealized components of defined benefit plans (10) (3) (32) (7)
Tax (provision) benefit on change in cumulative translation adjustment (7) 18 15 (26)
Tax (provision) benefit on other comprehensive income (46) (14) 7 (36)
Changes and reclassifications related to other comprehensive loss, net of taxes        
Net unrealized (losses) gains arising during the period     75  
Reclassifications of losses (gains) into earnings     237  
Other comprehensive (loss) income, net of taxes (10) 93 (162) (2)
Change in net unrealized gains (losses) on available-for-sale securities:        
Changes and reclassifications related to other comprehensive loss, net of taxes        
Net unrealized (losses) gains arising during the period 7 1 10 (4)
Reclassifications of losses (gains) into earnings (1) 0 1 0
Other comprehensive (loss) income, net of taxes 6 1 11 (4)
Change in net unrealized gains (losses) on available-for-sale securities: | Reclassifications of gains (losses) into earnings        
Changes and reclassifications related to other comprehensive loss, net of taxes        
Reclassifications of losses (gains) into earnings     (1)  
Change in net unrealized gains (losses) on cash flow hedges:        
Changes and reclassifications related to other comprehensive loss, net of taxes        
Net unrealized (losses) gains arising during the period 149 151 116 351
Reclassifications of losses (gains) into earnings     191  
Other comprehensive (loss) income, net of taxes 124 87 (75) 42
Change in net unrealized gains (losses) on cash flow hedges: | Reclassifications of gains (losses) into earnings        
Changes and reclassifications related to other comprehensive loss, net of taxes        
Reclassifications of losses (gains) into earnings 25 64 191 309
Change in net unrealized gains (losses) on cash flow hedges: | Reclassifications of gains (losses) into earnings | Cash flow hedges:        
Changes and reclassifications related to other comprehensive loss, net of taxes        
(Gain) Loss Reclassified from Accumulated OCI into Income (Effective Portion) (19) (71) (210) (370)
Change in net unrealized gains (losses) on cash flow hedges: | Reclassifications of gains (losses) into earnings | Cash flow hedges: | Net revenue        
Changes and reclassifications related to other comprehensive loss, net of taxes        
(Gain) Loss Reclassified from Accumulated OCI into Income (Effective Portion) 43 (17) (24) (219)
Change in net unrealized gains (losses) on cash flow hedges: | Reclassifications of gains (losses) into earnings | Cash flow hedges: | Cost of products        
Changes and reclassifications related to other comprehensive loss, net of taxes        
(Gain) Loss Reclassified from Accumulated OCI into Income (Effective Portion) 0 (2) 1 (5)
Change in net unrealized gains (losses) on cash flow hedges: | Reclassifications of gains (losses) into earnings | Cash flow hedges: | Other operating expenses        
Changes and reclassifications related to other comprehensive loss, net of taxes        
(Gain) Loss Reclassified from Accumulated OCI into Income (Effective Portion) 0 (1) 0 4
Change in net unrealized gains (losses) on cash flow hedges: | Reclassifications of gains (losses) into earnings | Cash flow hedges: | Interest and other, net        
Changes and reclassifications related to other comprehensive loss, net of taxes        
(Gain) Loss Reclassified from Accumulated OCI into Income (Effective Portion) (62) (51) (187) (150)
Unrealized components of defined benefit plans        
Changes and reclassifications related to other comprehensive loss, net of taxes        
Net unrealized (losses) gains arising during the period     199  
Reclassifications of losses (gains) into earnings     47  
Other comprehensive (loss) income, net of taxes 50 31 152 98
Losses arising during the period | Reclassifications of gains (losses) into earnings        
Changes and reclassifications related to other comprehensive loss, net of taxes        
Reclassifications of losses (gains) into earnings 11 0 12 0
Amortization of actuarial loss and prior service benefit | Reclassifications of gains (losses) into earnings        
Changes and reclassifications related to other comprehensive loss, net of taxes        
Reclassifications of losses (gains) into earnings 67 31 199 97
Curtailments, settlements and other        
Changes and reclassifications related to other comprehensive loss, net of taxes        
Other comprehensive (loss) income, net of taxes (6) 0 (35) 1
Change in cumulative translation adjustment        
Changes and reclassifications related to other comprehensive loss, net of taxes        
Net unrealized (losses) gains arising during the period     (250)  
Reclassifications of losses (gains) into earnings     0  
Other comprehensive (loss) income, net of taxes $ (190) $ (26) $ (250) $ (138)