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Summary Of Significant Accounting Policies - Major Customers And Concentration Of Risk (Details) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Customer Concentration Risk | Revenue Benchmark | Apache |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of concentration risk | 11.00% |  |
Customer Concentration Risk | Revenue Benchmark | Petrobras |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of concentration risk |  |  | 23.00%
Customer Concentration Risk | Revenue Benchmark | Shell |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of concentration risk | 10.00% | 15.00% | 17.00%
Unionized Employees Concentration Risk | Employees Benchmark |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of concentration risk | 19.00% |  |
Unionized Employees Covered by an Agreement that will Expire within One Year Concentration Risk | Employees Benchmark |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of concentration risk with agreements expiring within one year | 17.00% |  |

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