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Stockholders' Equity - Reclassifications (Details) - USD ($)
$ in Millions
3 Months Ended
Jan. 31, 2017
Jan. 31, 2016
Taxes on change in net unrealized (losses) gains on available-for-sale securities:    
Tax (provision) benefit on net unrealized (losses) gains arising during the period $ (1) $ 1
Tax benefit on losses reclassified into earnings 0 (3)
Taxes effect on change in unrealized gains on available-for-sales securities (1) (2)
Taxes on change in net unrealized (losses) gains on cash flow hedges:    
Tax provision on net unrealized gains arising during the period (31) (15)
Tax provision on net gains reclassified into earnings 32 19
Taxes effect on change in unrealized losses on cash flow hedges 1 4
Taxes on change in unrealized components of defined benefit plans:    
Tax provision on gains arising during the period (24) 0
Tax benefit on amortization of actuarial loss and prior service benefit (6) (5)
Tax provision on curtailments, settlements and other (7) (1)
Tax effect on change in unrealized components of defined benefit plans (37) (6)
Tax benefit (provision) on change in cumulative translation adjustment 1 (20)
Tax provision on other comprehensive income (36) (24)
Changes and reclassifications related to other comprehensive loss, net of taxes    
Net unrealized (losses) gains arising during the period 606  
Reclassifications of losses (gains) into earnings (131)  
Other comprehensive (loss) income, net of taxes 475 (77)
Change in net unrealized (losses) gains on available-for-sale securities:    
Changes and reclassifications related to other comprehensive loss, net of taxes    
Net unrealized (losses) gains arising during the period (14) 3
Reclassifications of losses (gains) into earnings 0 6
Other comprehensive (loss) income, net of taxes (14) 9
Change in net unrealized (losses) gains 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 0  
Change in net unrealized (losses) gains on cash flow hedges:    
Changes and reclassifications related to other comprehensive loss, net of taxes    
Net unrealized (losses) gains arising during the period 105 127
Reclassifications of losses (gains) into earnings (131)  
Other comprehensive (loss) income, net of taxes (26) 25
Change in net unrealized (losses) gains 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 (131) (102)
Change in net unrealized (losses) gains 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) (163) (121)
Change in net unrealized (losses) gains 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) (79) (61)
Change in net unrealized (losses) gains 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) (1) (1)
Change in net unrealized (losses) gains 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 0
Change in net unrealized (losses) gains 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) (83) (59)
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 539  
Reclassifications of losses (gains) into earnings 0  
Other comprehensive (loss) income, net of taxes 539 48
Gains 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 455 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 91 67
Curtailments, settlements and other    
Changes and reclassifications related to other comprehensive loss, net of taxes    
Other comprehensive (loss) income, net of taxes (7) (19)
Change in cumulative translation adjustment    
Changes and reclassifications related to other comprehensive loss, net of taxes    
Net unrealized (losses) gains arising during the period (24)  
Reclassifications of losses (gains) into earnings 0  
Other comprehensive (loss) income, net of taxes $ (24) $ (159)