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Summarized Financial Data - Chevron Phillips Chemical Company LLC (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Summarized Financial Data - Chevron Transport Corporation |  |  |  |  |
Total Revenues and Other Income | [1] |  | $ 32,877 |  | $ 64,401
Costs and other deductions |  | $ 37,331 | 32,527 | $ 70,022 | 62,819
Net income attributable to TCO |  | 3,409 | 1,450 | 7,047 | 4,132
Oil and Gas |  |  |  |  |
Summarized Financial Data - Chevron Transport Corporation |  |  |  |  |
Total Revenues and Other Income |  | $ 40,491 | $ 32,877 | $ 76,459 | 64,401
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 |  |  |  | $ 4,653 | 3,787
Net income attributable to TCO |  |  |  | 1,235 | 1,093
Chevron Phillips Chemical Company LLC | Oil and Gas |  |  |  |  |
Summarized Financial Data - Chevron Transport Corporation |  |  |  |  |
Total Revenues and Other Income |  |  |  | $ 5,578 | $ 4,701
Chevron Phillips Chemical Company LLC |  |  |  |  |
Affiliate Statements Captions [Line Items] |  |  |  |  |
Equity method investment, ownership percentage |  | 50.00% |  | 50.00% |
[1] | The three-month and six-month comparative periods ended June 30, 2017, include excise, value-added and similar taxes of $1,771 million and $3,448 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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