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Sales and Other Operating Revenue (Tables) | 9 Months Ended
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Sep. 30, 2018
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue [Table Text Block] |
| Millions of Dollars |
| Three Months Ended |  | Nine Months Ended |
September 30 | September 30 |
| 2018 |  | 2017 | * | 2018 |  | 2017 | *
Revenue from contracts with customers | $ | 7,546 |  | 4,636 |  | 20,834 |  | 14,428 |
Revenue from contracts outside the scope of ASC Topic 606 |  |  |  |  |  |  |  |  |
Physical contracts meeting the definition of a derivative |  | 1,897 |  | 2,050 |  | 5,877 |  | 6,631 |
Financial derivative contracts |  | 6 |  | 2 |  | 40 |  | (72) |
Consolidated sales and other operating revenues | $ | 9,449 |  | 6,688 |  | 26,751 |  | 20,987 |
*Under the modified retrospective approach, prior period amounts have not been adjusted upon adoption of ASC Topic 606. |
|  | Millions of Dollars |
|  | Three Months Ended |  | Nine Months Ended |
| September 30 | September 30 |
|  | 2018 |  | 2017 | * | 2018 |  | 2017 | *
Revenue from Outside the Scope of ASC Topic 606 |  |  |  |  |  |  |  |  |
| by Segment |  |  |  |  |  |  |  |  |
Lower 48 | $ | 1,534 |  | 1,563 |  | 4,547 |  | 4,834 |
Canada |  | 87 |  | 161 |  | 374 |  | 680 |
Europe and North Africa |  | 276 |  | 326 |  | 956 |  | 1,117 |
Physical contracts meeting the definition of a derivative | $ | 1,897 |  | 2,050 |  | 5,877 |  | 6,631 |
*Under the modified retrospective approach, prior period amounts have not been adjusted upon adoption of ASC Topic 606. |
|  | Millions of Dollars |
|  | Three Months Ended |  | Nine Months Ended |
| September 30 | September 30 |
|  | 2018 |  | 2017 | * | 2018 |  | 2017 | *
Revenue from Outside the Scope of ASC Topic 606 |  |  |  |  |  |  |  |  |
| by Product |  |  |  |  |  |  |  |  |
Crude oil | $ | 267 |  | 171 |  | 843 |  | 530 |
Natural gas |  | 1,522 |  | 1,811 |  | 4,775 |  | 5,870 |
Other |  | 108 |  | 68 |  | 259 |  | 231 |
Physical contracts meeting the definition of a derivative | $ | 1,897 |  | 2,050 |  | 5,877 |  | 6,631 |
*Under the modified retrospective approach, prior period amounts have not been adjusted upon adoption of ASC Topic 606. |
Contract with Customer, Asset and Liability [Table Text Block] |
| Millions of Dollars
Contract Liabilities |  |
At January 1, 2018 | $ | 251
Contractual payments received* |  | 81
Revenue recognized |  | (148)
At September 30, 2018 | $ | 184
Amounts Recognized in the Consolidated Balance Sheet at September 30, 2018 |  |
Current liabilities | $ | 147
Noncurrent liabilities |  | 37
| $ | 184
*Includes $14 million and $81 million for the three- and nine-month periods of 2018, respectively.

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- Definition Tabular disclosure of contract balances and changes in contract balances. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130551-203045 + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
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- References No definition available. + Details
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