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v3.5.0.2

Segment Information - Additional Information (Details) | 9 Months Ended
--- | ---
Sep. 30, 2016 USD ($)
Segment Reporting Information [Line Items] |
Goodwill And Intangible Asset Impairment | $ 0
Formax |
Segment Reporting Information [Line Items] |
Increase in goodwill and intangible assets as result of acquisition | $ 16,000,000

X
- Definition Goodwill and intangible assets acquired during period. + References No definition available. + Details
Name: | hxl_GoodwillAndIntangibleAssetsAcquiredDuringPeriod
Namespace Prefix: | hxl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Total loss recognized during the period from the impairment of goodwill plus the loss recognized in the period resulting from the impairment of the carrying amount of intangible assets, other than goodwill. + References No definition available. + Details
Name: | us-gaap_GoodwillAndIntangibleAssetImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=hxl_FormaxUKLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |