Segment, Geographic and Other Revenue Information - Long-Lived Assets By Geographic Region (Detail) - USD ($) $ in Millions |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
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| Revenues from External Customers and Long-Lived Assets [Line Items] | ||||||||||||||||
| Property, plant and equipment, net | $ 13,385 | [1],[2] | $ 13,865 | [1],[2] | $ 13,318 | |||||||||||
| United States [Member] | ||||||||||||||||
| Revenues from External Customers and Long-Lived Assets [Line Items] | ||||||||||||||||
| Property, plant and equipment, net | 7,089 | 6,971 | 6,649 | |||||||||||||
| Developed Europe [Member] | ||||||||||||||||
| Revenues from External Customers and Long-Lived Assets [Line Items] | ||||||||||||||||
| Property, plant and equipment, net | [3] | 4,204 | 4,345 | 4,228 | ||||||||||||
| Developed Rest Of World [Member] | ||||||||||||||||
| Revenues from External Customers and Long-Lived Assets [Line Items] | ||||||||||||||||
| Property, plant and equipment, net | [4] | 490 | 632 | 643 | ||||||||||||
| Emerging Markets [Member] | ||||||||||||||||
| Revenues from External Customers and Long-Lived Assets [Line Items] | ||||||||||||||||
| Property, plant and equipment, net | [5] | $ 1,602 | $ 1,917 | $ 1,797 | ||||||||||||
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