Related Party Transactions - Additional Information (Detail) - USD ($) $ in Millions |
3 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Dec. 31, 2025 |
|
| Related Party Transaction [Line Items] | |||
| Deferred revenue | $ 15.7 | $ 6.4 | |
| LM4 | |||
| Related Party Transaction [Line Items] | |||
| Percentage of ownership in joint venture | 50.00% | ||
| Chevron | Customer Concentration Risk | Revenue | |||
| Related Party Transaction [Line Items] | |||
| Revenues attributable to fee based commercial agreements | 96.00% | 98.00% | |
| Chevron | Amended and Restated Commercial Agreement | |||
| Related Party Transaction [Line Items] | |||
| Minimum volume commitments, Description | Minimum volume commitments (“MVCs”) are equal to 80% of Chevron’s nominations in each development plan that apply on a three-year rolling basis such that MVCs are set for the three years following the most recent nomination. Without our consent, the MVCs resulting from the nominated volumes for any quarter or year contained in any prior development plan cannot be reduced by any updated development plan unless dedicated production is released by us. The applicable MVCs may, however, be increased as a result of the nominations contained in any such updated development plan. If Chevron fails to deliver its applicable MVCs during any quarter, then Chevron will pay us a shortfall fee equal to the volume of the deficiency multiplied by the applicable fee. | ||
| Minimum volume commitments expressed as percentage of related party nominations in development plans | 80.00% | ||
| Initial term of agreement | 10 years | ||
| Agreement description | each of our commercial agreements with Chevron had an initial 10-year term effective January 1, 2014 (“Initial Term”). | ||
| Inflation escalator capped rate | 3.00% | ||
| Number of rights to extend the term of agreement | one | ||
| Advance period to call for extension of term of agreement | 3 years | ||
| Secondary term of agreement | 10 years | ||
| Chevron | Amended and Restated Agreement for Certain Gas Gathering Sub-system | |||
| Related Party Transaction [Line Items] | |||
| Initial term of agreement | 15 years | ||
| Agreement description | For this gathering sub-system, the Initial Term is 15 years effective January 1, 2014 and for the water services agreements the Initial Term is 14 years effective January 1, 2019. | ||
| Secondary term of agreement | 5 years | ||
| Renew terms of agreement description | Upon the expiration of the Secondary Term, if any, the agreements will automatically renew for subsequent one-year periods unless terminated by either party no later than 180 days prior to the end of the applicable Secondary Term. | ||
| Chevron | Amended and Restated Water Services Agreements | |||
| Related Party Transaction [Line Items] | |||
| Initial term of agreement | 14 years | ||
| Secondary term of agreement | 10 years | ||
| Chevron | Terminal and Export Services Agreement | |||
| Related Party Transaction [Line Items] | |||
| Commercial agreement period | 20 years | ||
| Chevron | Commercial Agreements Other Than Storage Services Agreement and Terminal and Export Services Agreement | |||
| Related Party Transaction [Line Items] | |||
| Minimum volume commitments, Description | During the Secondary Term, MVCs continue to be set at 80% of Chevron’s nominated volumes in each development plan set three years in advance. Except for the crude oil terminaling and water handling services, Chevron is entitled to receive a credit, calculated in barrels or Mcf, as applicable, with respect to the amount of any shortfall fee paid by Chevron and may apply such credit against any volumes delivered to us under the applicable agreement in excess of Chevron’s nominated volumes during any of the following four quarters after such credit is earned, after which time any unused credits will expire. The shortfall amounts received under MVCs during the Secondary Term (except for the crude oil terminaling and water handling services) are initially recorded as deferred revenue and recognized as revenue as the credits are utilized, expire, or when the likelihood of Chevron utilizing its remaining credits becomes remote. | ||
| Minimum volume commitments expressed as percentage of related party nominations in development plans | 80.00% | ||
| Maximum consumer price index percentage | 3.00% | ||
| Fee recalculation model description | the fee recalculation model under each applicable agreement is replaced by an inflation-based fee structure. The initial fee for the first year of the Secondary Term is determined based on the average fees paid by Chevron under the applicable agreement during the last three years of the Initial Term (with such fees adjusted for inflation through the first year of the Secondary Term). For each year following the first year of the Secondary Term, the applicable fee is adjusted annually based on the percentage change in the consumer price index, provided that we may not increase any fee by more than 3% in any calendar year solely by reason of an increase in the consumer price index, and no fee may ever be reduced below the amount of the applicable fee payable by Chevron in the prior year as a result of a decrease in the consumer price index. | ||
| Targa Resources Corp. | LM4 | |||
| Related Party Transaction [Line Items] | |||
| Percentage of ownership in joint venture | 50.00% | ||