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Segment Information - Schedule of Net Revenue by Segment and Business Unit (Details) - USD ($)
$ in Millions
 3 Months Ended
Jan. 31, 2019
Jan. 31, 2018
Segment Information    
Total net revenue $ 14,710 $ 14,517
Total segment net revenue    
Segment Information    
Total net revenue 14,714 14,517
Total segment net revenue | Personal Systems    
Segment Information    
Total net revenue 9,657 9,440
Total segment net revenue | Personal Systems | Notebooks    
Segment Information    
Total net revenue 5,919 5,595
Total segment net revenue | Personal Systems | Desktops    
Segment Information    
Total net revenue 2,857 2,955
Total segment net revenue | Personal Systems | Workstations    
Segment Information    
Total net revenue 562 543
Total segment net revenue | Personal Systems | Other    
Segment Information    
Total net revenue 319 347
Total segment net revenue | Printing    
Segment Information    
Total net revenue 5,056 5,076
Total segment net revenue | Printing | Supplies    
Segment Information    
Total net revenue 3,267 3,351
Total segment net revenue | Printing | Commercial Hardware    
Segment Information    
Total net revenue 1,090 1,037
Total segment net revenue | Printing | Consumer Hardware    
Segment Information    
Total net revenue 699 688
Total segment net revenue | Corporate Investments    
Segment Information    
Total net revenue 1 1
Other    
Segment Information    
Total net revenue $ (4) $ 0