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v3.20.4

Related Party Transactions (Tables) | 12 Months Ended
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Dec. 31, 2020
Related Party Transactions [Abstract] |
Summary of Transactions with Unconsolidated Affiliates | The following table summarizes transactions with unconsolidated affiliates:
|  | GCF |  |  | T2 Joint Ventures |  |  | Cayenne |  |  | GCX |  |  | Little Missouri 4 |  |  | Agua Blanca |  |  | Total |
2020: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | $ | 0.4 |  |  | $ | 4.5 |  |  | $ | — |  |  | $ | 0.6 |  |  | $ | 12.6 |  |  | $ | — |  |  | $ | 18.1 |
Product purchases |  |  | — |  |  |  | — |  |  |  | (5.9 | ) |  |  | (68.0 | ) |  |  | — |  |  |  | — |  |  |  | (73.9 | )
Operating expenses |  |  | (16.0 | ) |  |  | (1.2 | ) |  |  | (0.2 | ) |  |  | — |  |  |  | (2.2 | ) |  |  | — |  |  |  | (19.6 | )
General and administrative expenses |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (0.8 | ) |  |  | — |  |  |  | (0.8 | )
2019: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | $ | 0.3 |  |  | $ | 3.7 |  |  | $ | — |  |  | $ | 0.8 |  |  | $ | 6.3 |  |  | $ | — |  |  | $ | 11.1 |
Product purchases |  |  | (7.9 | ) |  |  | — |  |  |  | (7.9 | ) |  |  | (24.7 | ) |  |  | — |  |  |  | — |  |  |  | (40.5 | )
Operating expenses |  |  | — |  |  |  | (2.0 | ) |  |  | (0.2 | ) |  |  | — |  |  |  | — |  |  |  | (1.2 | ) |  |  | (3.4 | )
General and administrative expenses |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (0.3 | ) |  |  | — |  |  |  | (0.3 | )
2018: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | $ | 0.3 |  |  | $ | 5.2 |  |  | $ | — |  |  | $ | 0.1 |  |  | $ | — |  |  | $ | — |  |  | $ | 5.6 |
Product purchases |  |  | (5.1 | ) |  |  | (0.6 | ) |  |  | (7.2 | ) |  |  | (1.2 | ) |  |  | — |  |  |  | — |  |  |  | (14.1 | )
Operating expenses |  |  | — |  |  |  | (3.6 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (3.6 | )

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- References No definition available. + Details
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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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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration