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Commitments and Contingencies - Additional Information (Details) $ in Millions |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Mar. 24, 2023 Entity | Dec. 16, 2022 USD ($) Prp | Oct. 18, 2021 USD ($) mi | Aug. 31, 2017 Entity | Mar. 31, 2016 USD ($) mi | Sep. 30, 2025 USD ($) Prp | Sep. 30, 2025 USD ($) Entity mi | Dec. 31, 2024 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Number of identified non governmental potentially responsible parties | Entity |  |  |  | 120 |  |  |  |
Environmental Loss Contingency |  |  |  |  |  | Accrued compensation and benefits | Accrued compensation and benefits | Accrued compensation and benefits
Accrual for environmental loss contingencies |  |  |  |  |  | $ 0.3 | $ 0.3 | $ 0.3
District Court Approval Of Consent Decree Member |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Number of entities, in addition to Hexcel, who received a directive from the New Jersey Department of Environmental Protection |  |  |  |  |  | 84 | 48 |
New Jersey Requesting Court Approval for Settlement |  | $ 150.0 |  |  |  |  |  |
Escrow Deposit |  | $ 150.0 |  |  |  |  |  |
Lower Passaic River |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Number of entities, in addition to Hexcel, who received a directive from the New Jersey Department of Environmental Protection | Prp |  | 83 |  |  |  |  |  |
'Length of river to perform a Remedial Investigation/Feasibility Study (“RI/FS”) of environmental conditions | mi |  |  |  |  |  |  | 17 |
Lower Passaic River | Minimum |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Portion of the river for which Record of Decision setting forth the EPA's selected remedy (in miles) | mi |  |  |  |  | 8 |  |  |
Expected cost of capping and dredging of the lower eight miles of the river by EPA |  |  | $ 308.7 |  | $ 970.0 |  |  |
Lower Passaic River | Maximum |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Portion of the river for which Record of Decision setting forth the EPA's selected remedy (in miles) | mi |  |  | 9 |  |  |  |  |
Expected cost of capping and dredging of the lower eight miles of the river by EPA |  |  | $ 661.5 |  | $ 2,070.0 |  |  |
Unilateral Administrative Order [Member] |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Number of entities, in addition to Hexcel, who received a directive from the New Jersey Department of Environmental Protection | Entity | 38 |  |  |  |  |  |  |

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