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Segment Reporting - Additional Information (Detail) $ in Millions |  | 12 Months Ended | 19 Months Ended
--- | --- | --- | ---
May 08, 2019 USD ($) | Dec. 31, 2021 segment | May 07, 2019
Segment Reporting Information [Line Items] |  |  |
Number of Reportable Segments | segment |  | 2 |
Altera |  |  |
Segment Reporting Information [Line Items] |  |  |
Due from Affiliate, Noncurrent | $ | $ 25 |  |
Altera | General Partner |  |  |
Segment Reporting Information [Line Items] |  |  |
Interest of Company's general partner |  |  | 49.00%
Altera | Thousands of Shares of Common Stock Outstanding |  |  |
Segment Reporting Information [Line Items] |  |  |
Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest |  |  | 13.80%
Teekay Corporation | General Partner | Altera |  |  |
Segment Reporting Information [Line Items] |  |  |
Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest | 49.00% |  |

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