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Related Party Transactions Related Party Transactions (Tables) | 3 Months Ended
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Mar. 31, 2021
Related Party Transactions [Abstract] |
Schedule of Related Party Transactions [Table Text Block] | The following table summarizes the revenues from related companies on our consolidated statements of operations:
|  |  | Three Months Ended March 31,
|  |  |  |  | 2021 |  | 2020
Revenues from related companies |  |  |  |  | $ | 130 |  |  | $ | 133 |
The following table summarizes the accounts receivable from related companies on our consolidated balance sheets:
| March 31, 2021 |  | December 31, 2020
Accounts receivable from related companies: |  |  |
FGT | $ | 14 |  |  | $ | 12 |
Phillips 66 | 21 |  |  | 30 |
Various | 55 |  |  | 37 |
Total accounts receivable from related companies | $ | 90 |  |  | $ | 79 |

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- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References No definition available. + Details
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