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Segment Reporting - Consolidated Revenues by Geographic Area (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Revenue from External Customer [Line Items] |  |  |  |
Sales | $ 11,760 | $ 10,465 | $ 22,575 | $ 20,502
United States |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Sales | 5,144 | 4,262 | 9,659 | 8,395
Europe, Middle East and Africa |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Sales | 3,163 | 3,144 | 6,265 | 6,334
Japan |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Sales | 921 | 855 | 1,720 | 1,592
China |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Sales | 763 | 559 | 1,509 | 1,045
Asia Pacific (other than Japan and China) |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Sales | 716 | 791 | 1,461 | 1,543
Latin America |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Sales | 658 | 594 | 1,219 | 1,126
Other |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Sales | $ 395 | $ 260 | $ 742 | $ 467

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