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Segment Reporting - Consolidated Revenues by Geographic Area (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Revenue from External Customer [Line Items] |  |
Sales | $ 10,037 | $ 9,434
United States |  |
Revenue from External Customer [Line Items] |  |
Sales | 4,133 | 4,195
Europe, Middle East, Africa |  |
Revenue from External Customer [Line Items] |  |
Sales | 3,191 | 2,629
Asia Pacific |  |
Revenue from External Customer [Line Items] |  |
Sales | 1,238 | 1,001
Japan |  |
Revenue from External Customer [Line Items] |  |
Sales | 737 | 705
Latin America |  |
Revenue from External Customer [Line Items] |  |
Sales | 532 | 485
Other |  |
Revenue from External Customer [Line Items] |  |
Sales | $ 206 | $ 419

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