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Summarized Financial Data - Chevron Phillips Chemical Company LLC (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Summarized Financial Data - Chevron Transport Corporation |  |  |  |  |
Total Revenues and Other Income | [1] |  | $ 33,892 |  | $ 98,293
Costs and other deductions |  | $ 38,288 | 33,547 | $ 108,310 | 96,366
Net income attributable to TCO |  | $ 4,047 | 1,952 | $ 11,094 | 6,084
Oil and Gas |  |  |  |  |
Summarized Financial Data - Chevron Transport Corporation |  |  |  |  |
Total Revenues and Other Income |  |  | $ 33,892 |  | 98,293
Chevron Phillips Chemical Company LLC |  |  |  |  |
Affiliate Statements Captions [Line Items] |  |  |  |  |
Percentage of affiliate by summarized financial information |  | 100.00% |  | 100.00% |
Summarized Financial Data - Chevron Transport Corporation |  |  |  |  |
Costs and other deductions |  |  |  | $ 7,475 | 5,732
Net income attributable to TCO |  |  |  | 1,766 | 1,424
Chevron Phillips Chemical Company LLC | Oil and Gas |  |  |  |  |
Summarized Financial Data - Chevron Transport Corporation |  |  |  |  |
Total Revenues and Other Income |  |  |  | $ 8,773 | $ 6,816
Chevron Phillips Chemical Company LLC |  |  |  |  |
Affiliate Statements Captions [Line Items] |  |  |  |  |
Equity method investment, ownership percentage |  | 50.00% |  | 50.00% |
[1] | The three-month and nine-month comparative periods ended September 30, 2017, include excise, value-added and similar taxes of $1,867 million and $5,315 million, respectively, collected on behalf of third parties. Beginning in 2018, these taxes are netted in "Taxes other than on income" in accordance with ASU 2014-09. Refer to Note 17, "Revenue" beginning on page 24.

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