Name:	hxl_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssetsForNextFiscalYear
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1) For defined benefit pension plans, the current benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of benefits attributed by the pension benefit formula to employee service rendered prior to that date. 2) For other postretirement defined benefit plans, the current benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date.

No definition available.

Name:	hxl_DefinedBenefitPlanBenefitObligationCurrent
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1) For defined benefit pension plans, the noncurrent benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of benefits attributed by the pension benefit formula to employee service rendered prior to that date. 2) For other postretirement defined benefit plans, the noncurrent benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date.

No definition available.

Name:	hxl_DefinedBenefitPlanBenefitObligationNoncurrent
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No definition available.

Name:	hxl_DefinedBenefitPlanEffectOfOnePercentagePointChangeInDiscountRateAbstract
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For defined benefit plans, this element represents the assumed annual rate of increase in the per capita cost of covered health care benefits for dental and vision care.

No definition available.

Name:	hxl_DefinedBenefitPlanHealthCareCostTrendRateAssumedForDentalAndVisionCare
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For defined benefit plans, this element represents the assumed annual rate of increase in the per capita cost of covered health care benefits for medical care.

No definition available.

Name:	hxl_DefinedBenefitPlanHealthCareCostTrendRateAssumedForMedicalCare
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Defined benefit plan long term rate of improvement.

No definition available.

Name:	hxl_DefinedBenefitPlanLongTermRateOfImprovement
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The amount of excess accumulated benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

No definition available.

Name:	hxl_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsExcessAccumulatedBenefitObligations
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For defined benefit plans, this element represents the ultimate annual rate of increase in the per capita cost of covered health care benefits for dental and vision care.

No definition available.

Name:	hxl_DefinedBenefitPlanUltimateHealthCareCostTrendRateForDentalAndVisionCare
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For defined benefit plans, this element represents the ultimate annual rate of increase in the per capita cost of covered health care benefits for medical care under defined benefit plans.

No definition available.

Name:	hxl_DefinedBenefitPlanUltimateHealthCareCostTrendRateForMedicalCare
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Percentage of employee gross pay, by the terms of the plan that the employer may contribute to a defined contribution plan under the first option.

No definition available.

Name:	hxl_DefinedContributionPlanAnnualContributionPerEmployeePercentageUnderOptionOne
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Percentage of employee gross pay, by the terms of the plan that the employer may contribute to a defined contribution plan under the third option.

No definition available.

Name:	hxl_DefinedContributionPlanAnnualContributionPerEmployeePercentageUnderOptionThree
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Percentage of employee gross pay, by the terms of the plan that the employer may contribute to a defined contribution plan under the second option.

No definition available.

Name:	hxl_DefinedContributionPlanAnnualContributionPerEmployeePercentageUnderOptionTwo
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For defined contribution plans, this element represent the maximum percentage of employee's annual compensation allowed as contribution to individual 401(k) retirement saving account.

No definition available.

Name:	hxl_DefinedContributionPlanEmployeeContributionAsPercentageOfAnnualCompensationMaximum
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Percentage of employees' gross pay for which the employer will contribute a matching contribution to the defined contribution plan under the first option.

No definition available.

Name:	hxl_DefinedContributionPlanEmployerMatchingContributionPercentageUnderOptionOne
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Percentage of employees' gross pay for which the employer will contribute a matching contribution to the defined contribution plan under the third option.

No definition available.

Name:	hxl_DefinedContributionPlanEmployerMatchingContributionPercentageUnderOptionThree
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Percentage of employees' gross pay for which the employer will contribute a matching contribution to the defined contribution plan under the second option.

No definition available.

Name:	hxl_DefinedContributionPlanEmployerMatchingContributionPercentageUnderOptionTwo
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For defined contribution plans, this element represents the maximum employer contribution to individual 401(k) retirement saving account, low end of range.

No definition available.

Name:	hxl_DefinedContributionPlanMaximumPercentageOfParticipantContribution
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For defined contribution plans, this element represents the additional employer contribution as a percentage of eligible income depending on employee's age.

No definition available.

Name:	hxl_DefinedContributionPlanPercentageOfEmployerAdditionalContributionDependentOfEmployeeAge
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For defined contribution plans, this element represent the employer contribution as a percentage of employee contribution.

No definition available.

Name:	hxl_DefinedContributionPlanPercentageOfEmployerContributionForUptoThreePercentOfParticipantContribution
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Data Type:	num:percentItemType
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The employer's best estimate, as soon as it can be reasonably determined, of contributions expected to be paid to the multiemployer plan during the next fiscal year beginning from the date of the latest statement of financial position.

No definition available.

Name:	hxl_MultiemployerPlanExpectedContributionsInNextFiscalYear
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Represents the minimum percentage of contributions made under a collective bargaining arrangement to all contributions required of an employer related to a pension or postretirement benefit plan to which two or more unrelated employers contribute, where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers.

No definition available.

Name:	hxl_MultiemployerPlansCollectiveBargainingArrangementPercentageOfEmployersContributionsByParentMinimum
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For defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date. The accumulated benefit obligation differs from the projected benefit obligation in that it includes no assumption about future compensation levels. For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Accumulated Benefit Obligation
-URI http://asc.fasb.org/extlink&oid=6503844

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

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No definition available.

Name:	us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTaxAbstract
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No definition available.

Name:	us-gaap_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeAbstract
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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.

No definition available.

Name:	us-gaap_DefinedBenefitPlanDisclosureLineItems
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Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 30
-Section 35
-Paragraph 50
-URI http://asc.fasb.org/extlink&oid=49178875&loc=d3e12355-114930

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

Name:	us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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Amount included in accumulated other comprehensive income (AOCI) related to gain (loss) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position.

No definition available.

Name:	us-gaap_DefinedBenefitPlanFutureAmortizationOfGainLoss
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Data Type:	xbrli:monetaryItemType
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Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2446-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

Name:	us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
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Amount of employer's best estimate of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

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No definition available.

Name:	us-gaap_DefinedContributionPensionAndOtherPostretirementPlansDisclosureAbstract
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Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

No definition available.

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
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No definition available.

Name:	us-gaap_MultiemployerPlansAbstract
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Amount of contributions made to the multiemployer plan by all employers who participate in the plan. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 50
-Paragraph 7
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=49170332&loc=SL14450678-114947

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