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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 6 Months Ended
Apr. 30, 2018
Apr. 30, 2017
Apr. 30, 2018
Apr. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]        
Net revenue $ 7,468 $ 6,808 $ 15,142 $ 13,710
Interest and other, net (78) (86) (99) (164)
(Loss) earnings from continuing operations before taxes (116) 113 (773) 448
Net loss from discontinued operations (72) (134) (118) (118)
Net earnings (loss) 778 (612) 2,214 (345)
Foreign currency contracts | Cash flow hedges        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (Losses) Recognized in Other Comprehensive Income (OCI) on Derivatives (Effective Portion) 82 4 (99) 140
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 (65) 0 (111) 54
Interest and other, net (26) 66 (10) 149
(Loss) earnings from continuing operations before taxes (91) 66 (121) 203
Net loss from discontinued operations   17   43
Net earnings (loss)   83   246
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) 117 (55) (62) (3)
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)   (1)   (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) (35) 66 (37) 142
Foreign currency contracts | Cash flow hedges | Net loss from continuing operations        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (Losses) Recognized in Other Comprehensive Income (OCI) on Derivatives (Effective Portion)   10   138
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)   (6)   2
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 $ (8) $ (25) $ (10)