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Operating Segments and Geographic Data (Details 2) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues | [1] | $ 134,674 | $ 110,215 | $ 129,925
United States |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues |  | 1,022 | 1,105 | 1,513
International |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues |  | 26 | 37 | 42
Upstream |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues |  | 41,922 | 33,145 | 39,827
Upstream | United States |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues |  | 13,242 | 10,365 | 12,748
Upstream | International |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues |  | 28,680 | 22,780 | 27,079
Downstream |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues |  | 114,535 | 94,743 | 111,629
Downstream | United States |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues |  | 53,140 | 44,717 | 52,872
Downstream | International |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues |  | 61,395 | 50,026 | 58,757
Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues |  | 157,505 | 129,030 | 153,011
Operating Segments | United States |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues |  | 67,404 | 56,187 | 67,133
Operating Segments | International |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues |  | 90,101 | 72,843 | 85,878
Operating Segments | Upstream | United States |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues |  | 3,901 | 3,148 | 4,117
Operating Segments | Upstream | International |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues |  | 17,209 | 13,262 | 15,587
Operating Segments | Downstream | United States |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues |  | 48,728 | 40,366 | 48,420
Operating Segments | Downstream | International |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues |  | 57,438 | 46,388 | 54,296
Intersegment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues |  | (22,831) | (18,815) | (23,086)
Intersegment | United States |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues |  | 814 | 960 | 1,372
Intersegment | International |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues |  | 25 | 36 | 37
Intersegment | Upstream | United States |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues |  | 9,341 | 7,217 | 8,631
Intersegment | Upstream | International |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues |  | 11,471 | 9,518 | 11,492
Intersegment | Downstream | United States |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues |  | 14 | 16 | 26
Intersegment | Downstream | International |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues |  | 1,166 | 1,068 | 1,528
Segment Reconciling Items | Downstream | United States |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues |  | 4,398 | 4,335 | 4,426
Segment Reconciling Items | Downstream | International |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues |  | 2,791 | 2,570 | 2,933
All Other | United States |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues |  | 208 | 145 | 141
All Other | International |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues |  | 1 | 1 | 5
Total All Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues |  | $ 1,048 | $ 1,142 | $ 1,555
[1] | Includes excise, value-added and similar taxes. $7,189; $6,905; $7,359.

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