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Industry Segment Operations (Income Loss by Segment) (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Oct. 30, 2016
Jul. 31, 2016
May 01, 2016
Jan. 31, 2016
Oct. 25, 2015
Jul. 26, 2015
Apr. 26, 2015
Jan. 25, 2015
Oct. 30, 2016
Oct. 25, 2015
Oct. 26, 2014
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]                      
Unallocated net sales $ 3,297 $ 2,821 $ 2,450 $ 2,257 $ 2,368 $ 2,490 $ 2,442 $ 2,359 $ 10,825 $ 9,659 $ 9,072
Share-based compensation                 (201) (187) (177)
Gain (loss) on derivatives associated with terminated business combination                 0 89 30
Total                 2,152 1,693 1,520
Corporate, Reconciling Items, And Eliminations                      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]                      
Unallocated net sales                 157 133 132
Unallocated cost of products sold and expenses                 (538) (523) (523)
Share-based compensation                 (201) (187) (177)
Certain items associated with terminated business combination                 0 (50) (73)
Gain (loss) on derivatives associated with terminated business combination                 0 89 30
Total                 $ (582) $ (538) $ (611)