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Commitments and Contingencies - Additional Information (Detail) |  |  |  |  |  |  |  | 1 Months Ended | 9 Months Ended | 12 Months Ended |  |  |  |
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Jul. 09, 2024 Rule | Sep. 28, 2021 USD ($) | Dec. 31, 2020 Party | Jun. 30, 2018 Defendant | Dec. 17, 2017 Defendant | Mar. 04, 2016 USD ($) | Jul. 07, 2014 Defendant | May 31, 2017 Defendant | Sep. 30, 2024 USD ($) Party | Dec. 31, 2022 USD ($) | Dec. 31, 2004 Entity | Dec. 31, 2023 USD ($) | Dec. 31, 2021 Party | Dec. 31, 2018 Party | Mar. 31, 2016 Party
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued legal matters | $ |  |  |  |  |  |  |  |  | $ 0 |  |  | $ 0 |  |  |
Description of allocation methodology approved by EPA |  |  |  |  |  |  |  |  | allocation methodology approved by the EPA that contains associated allocation shares for each of the parties invited to participate in the allocation, including Occidental - who the allocator concluded was responsible for more than 99% of the costs to implement the OU2 remedy |  |  |  |  |  |
Number of settling parties | Party |  |  | 85 |  |  |  |  |  | 85 |  |  |  |  |  |
Number of remaining settling parties | Party |  |  |  |  |  |  |  |  | 82 |  |  |  |  |  |
Number of responsible parties | Party |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |
Number of recent supreme court rulings issued | Rule | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Occidental Chemical Corporation [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of defendants under complaint | Defendant |  |  |  | 120 |  |  |  |  |  |  |  |  |  |  |
EPA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of potentially responsible parties | Party |  |  |  |  |  |  |  |  |  |  |  |  | 21 | 21 | 100
Amount agreed by settling parties to EPA | $ |  |  |  |  |  |  |  |  |  | $ 150,000,000 |  |  |  |  |
8 Mile Stretch of Lower Passaic River [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cost estimate for remediating Lower Passaic River | $ |  |  |  |  |  | $ 1,400,000,000 |  |  |  |  |  |  |  |  |
Upper 9-mile IR ROD [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated cost of dredging and capping to control sediment sources of dioxin and PCBs | $ |  | $ 441,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum [Member] | 17 Mile Stretch of Lower Passaic River [Member] | EPA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of entities to which general notice letters issued | Entity |  |  |  |  |  |  |  |  |  |  | 100 |  |  |  |
Lower Passaic River [Member] | Minimum [Member] | 17 Mile Stretch of Lower Passaic River [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Parties to perform a remedial investigation and feasibility study | Defendant |  |  |  |  |  |  |  | 70 |  |  |  |  |  |  |
MTBE [Member] | Minimum [Member] | PA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of defendants in the MTBE complaint | Defendant |  |  |  |  |  |  | 50 |  |  |  |  |  |  |  |
MTBE [Member] | Minimum [Member] | MARYLAND [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of defendants in the MTBE complaint | Defendant |  |  |  |  | 60 |  |  |  |  |  |  |  |  |  |

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