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Commitments and Contingencies - Additional Information (Details) | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Mar. 31, 2016 USD ($) mi | Jun. 30, 2018 USD ($) | Jun. 30, 2017 USD ($) | Jun. 30, 2018 USD ($) entity | Jun. 30, 2017 USD ($) | Dec. 31, 2017 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |  |
Accrual for environmental loss contingencies |  | $ 2,900,000 |  | $ 2,900,000 |  | $ 2,800,000
Aggregate environmental related accruals included in current accrued liabilities |  | 1,000,000 |  | 1,000,000 |  | 900,000
Amount which is better estimate within range |  | 0 |  | 0 |  | 0
Remediation accrual balance if accrued at high end of the range of possible outcomes |  | 16,000,000 |  | 16,000,000 |  |
Environmental remediation spending charged to reserve balance |  | 200,000 | $ 100,000 | 300,000 | $ 200,000 |
Operating costs relating to environmental compliance |  | 2,600,000 | $ 2,500,000 | 5,100,000 | $ 4,700,000 |
Omega Chemical Corporation Superfund Site, Whittier | California |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Accrual for environmental loss contingencies |  | 500,000 |  | $ 500,000 |  | 600,000
Contribution to waste tonnage (as a percent) |  |  |  | 1.07% |  |
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 | entity |  |  |  | 48 |  |
Portion of the river for which Record of Decision setting forth the EPA's selected remedy (in miles) | mi | 8 |  |  |  |  |
Portion of upper miles of river for which EPA not yet selected remedy | mi | 9 |  |  |  |  |
Accrual for environmental loss contingencies |  | $ 2,200,000 |  | $ 2,200,000 |  | $ 2,100,000
Lower Passaic River | Minimum |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Expected cost of capping and dredging of the lower eight miles of the river by EPA | $ 970,000,000 |  |  |  |  |
Lower Passaic River | Maximum |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Expected cost of capping and dredging of the lower eight miles of the river by EPA | $ 2,070,000,000 |  |  |  |  |

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