Commitments and Contingencies - Additional Information (Details)	1 Months Ended				9 Months Ended
	Oct. 18, 2021 USD ($) mi	Aug. 31, 2017 Prp	Oct. 31, 2016 mi	Mar. 31, 2016 USD ($) mi	Sep. 30, 2021 USD ($) Entity mi	Dec. 31, 2020 USD ($)
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies					$ 2,200,000	$ 2,400,000
Aggregate environmental accruals included in current other accrued liabilities					200,000	500,000
Amount which is better estimate within range					0	0
Remediation accrual balance if accrued at high end of the range of possible outcomes					$ 16,000,000	16,000,000
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
'Length of river to perform a Remedial Investigation/Feasibility Study (“RI/FS”) of environmental conditions | mi					17
Number of identified non governmental potentially responsible parties | Prp		120
Accrual for environmental loss contingencies					$ 2,100,000	$ 2,100,000
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	8
Expected cost of capping and dredging of the lower eight miles of the river by EPA				$ 970,000,000
Lower Passaic River | Minimum | Subsequent Event
Loss Contingencies [Line Items]
Expected cost of capping and dredging of the lower eight miles of the river by EPA	$ 308,700,000
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				$ 2,070,000,000.00
Lower Passaic River | Maximum | Subsequent Event
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	$ 661,500,000