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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Data Type:	xbrli:monetaryItemType
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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
Namespace Prefix:	hxl_
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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
Namespace Prefix:	hxl_
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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
Namespace Prefix:	hxl_
Data Type:	num:percentItemType
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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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Data Type:	num:percentItemType
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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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Data Type:	num:percentItemType
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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
Namespace Prefix:	hxl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

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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Data Type:	num:percentItemType
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Period Type:	duration

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
Namespace Prefix:	hxl_
Data Type:	num:percentItemType
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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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Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level.

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No definition available.

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No definition available.

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No definition available.

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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.

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Amount included in accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan expected to be recognized in net periodic benefit (cost) credit for fiscal year following most recent annual statement of financial position.

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Amount included in accumulated other comprehensive (income) loss for prior service cost (credit) expected to be recognized in net periodic benefit cost (credit) for fiscal year following most recent annual statement of financial position.

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Amount of contributions expected to be received by defined benefit plan from employer in next fiscal year following latest fiscal year.

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Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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Name:	us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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Amount of defined benefit plan cost (credit), classified as other.

No definition available.

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Indicates tax status of defined benefit plan designed to provide retirement benefits.

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Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

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No definition available.

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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 multiemployer plan by all employers who participate in plan.

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