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Financial Instruments - Pre-tax Effect of Derivative Instruments in Cash Flow and Net Investment Hedging Relationships (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jul. 31, 2018
Jul. 31, 2017
Jul. 31, 2018
Jul. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]        
Net revenue $ 7,764 $ 7,501 $ 22,906 $ 21,211
Interest and other, net (64) (87) (163) (251)
Earnings (loss) from continuing operations before taxes 465 125 (308) 573
Net loss from discontinued operations (1) (120) (119) (238)
Net earnings (loss) 451 165 2,665 (180)
Foreign currency contracts | Cash flow hedges        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (Losses) Recognized in Other Comprehensive Income (OCI) on Derivatives (Effective Portion) 149 (133) 50 7
Foreign currency contracts | Cash flow hedges | Gains (Losses) Reclassified from Accumulated OCI Into Earnings (Effective Portion) | Reclassifications of gains (losses) into earnings        
Derivative Instruments, Gain (Loss) [Line Items]        
Net revenue 29 (45) (82) 9
Interest and other, net 14 29 4 178
Earnings (loss) from continuing operations before taxes 43 (16) (78) 187
Net loss from discontinued operations   1   44
Net earnings (loss)   (15)   231
Foreign currency contracts | Cash flow hedges | Net revenue        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (Losses) Recognized in Other Comprehensive Income (OCI) on Derivatives (Effective Portion) 121 (160) 59 (163)
Foreign currency contracts | Cash flow hedges | Cost of products        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (Losses) Recognized in Other Comprehensive Income (OCI) on Derivatives (Effective Portion)   0   (1)
Foreign currency contracts | Cash flow hedges | Interest and other, net        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (Losses) Recognized in Other Comprehensive Income (OCI) on Derivatives (Effective Portion) 28 28 (9) 170
Foreign currency contracts | Cash flow hedges | Net earnings from continuing operations        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (Losses) Recognized in Other Comprehensive Income (OCI) on Derivatives (Effective Portion)   (132)   6
Foreign currency contracts | Cash flow hedges | Net (loss) earnings from discontinued operations        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (Losses) Recognized in Other Comprehensive Income (OCI) on Derivatives (Effective Portion)   (1)   1
Foreign currency contracts | Net investment hedges | Gains (Losses) Reclassified from Accumulated OCI Into Earnings (Effective Portion) | Reclassifications of gains (losses) into earnings        
Derivative Instruments, Gain (Loss) [Line Items]        
Interest and other, net 0 0 0 0
Foreign currency contracts | Net investment hedges | Interest and other, net        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (Losses) Recognized in Other Comprehensive Income (OCI) on Derivatives (Effective Portion) $ 57 $ (97) $ 31 $ (107)