Segment Information (Detail 3) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Oct. 31, 2016 |
Oct. 31, 2015 |
Oct. 31, 2014 |
|
| Segment Reporting Information | |||
| Net revenue | $ 50,123 | $ 52,107 | $ 55,123 |
| Net property, plant and equipment: | |||
| Property, plant and equipment | 9,636 | 9,886 | |
| U.S. | |||
| Segment Reporting Information | |||
| Net revenue | 19,581 | 20,063 | 20,833 |
| Net property, plant and equipment: | |||
| Property, plant and equipment | 4,768 | 4,851 | |
| United Kingdom | |||
| Segment Reporting Information | |||
| Net revenue | 5,074 | 5,379 | 5,661 |
| Net property, plant and equipment: | |||
| Property, plant and equipment | 912 | 955 | |
| Other countries | |||
| Segment Reporting Information | |||
| Net revenue | 25,468 | 26,665 | $ 28,629 |
| Net property, plant and equipment: | |||
| Property, plant and equipment | $ 3,956 | $ 4,080 | |