XML 83 R70.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Retirement and Other Postretirement Benefit Plans - Schedule of Impact of One-Percentage-Point Change in Expected Long-term Rate of Return and Discount Rate on Pension Expense and Retirement Obligation (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 USD ($)
U.S. Non-qualified Defined Benefit Retirement Plans |
Impact of one-percentage-point increase and a one-percentage-point decrease in the discount rate on retirement obligation as of December 31, 2018 |
One-percentage-point increase in discount rate | $ (0.8)
One-percentage-point decrease in discount rate | (0.9)
United States Retiree Medical Plans |
Impact of one-percentage-point increase and a one-percentage-point decrease in the discount rate on retirement obligation as of December 31, 2018 |
One-percentage-point increase in discount rate | (0.2)
One-percentage-point decrease in discount rate | 0.2
United Kingdom defined benefit Retirement plan (the U.K. Plan) |
Impact of one-percentage-point increase and a one-percentage-point decrease in the expected long-term rate of return and discount rate on periodic pension expense in next fiscal year |
One-percentage-point increase in expected long-term rate of return | (1.8)
One-percentage-point increase in discount rate | 0.5
One-percentage-point decrease in expected long-term rate of return | 1.8
One-percentage-point decrease in discount rate | 0.1
Impact of one-percentage-point increase and a one-percentage-point decrease in the discount rate on retirement obligation as of December 31, 2018 |
One-percentage-point increase in discount rate | (20.8)
One-percentage-point decrease in discount rate | $ 26.5

X
- References No definition available. + Details
Name: | hxl_DefinedBenefitPlanEffectOfOnePercentagePointChangeInDiscountRateAbstract
Namespace Prefix: | hxl_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | hxl_DefinedBenefitPlanEffectOfOnePercentagePointChangeInExpectedLongTermReturnOnAssetsAndDiscountRateAbstract
Namespace Prefix: | hxl_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the impact of one-percentage-point decrease in the discount rate on retirement obligations at the end of next fiscal year. + References No definition available. + Details
Name: | hxl_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseInDiscountRateOnBenefitObligationInNextFiscalYear
Namespace Prefix: | hxl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the impact of one-percentage-point decrease in the discount rate on periodic pension expenses in the next fiscal year. + References No definition available. + Details
Name: | hxl_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseInDiscountRateOnNetPeriodicBenefitCostInNextFiscalYear
Namespace Prefix: | hxl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the impact of one-percentage-point decrease in the expected long-term rate of return on periodic pension expenses in the next fiscal year. + References No definition available. + Details
Name: | hxl_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseInExpectedLongTermReturnOnAssetsNetPeriodicBenefitCostInNextFiscalYear
Namespace Prefix: | hxl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the impact of one-percentage-point increase in the discount rate on retirement obligations at the end of next fiscal year. + References No definition available. + Details
Name: | hxl_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseInDiscountRateOnBenefitObligationInNextFiscalYear
Namespace Prefix: | hxl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Defined benefit plan effect of one percentage point increase in discount rate on net periodic benefit cost increase decrease in next fiscal year. + References No definition available. + Details
Name: | hxl_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseInDiscountRateOnNetPeriodicBenefitCostIncreaseDecreaseInNextFiscalYear
Namespace Prefix: | hxl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the impact of one-percentage-point increase in the expected long-term rate of return on periodic pension expenses in the next fiscal year. + References No definition available. + Details
Name: | hxl_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseInExpectedLongTermReturnOnAssetsOnNetPeriodicBenefitCostInNextFiscalYear
Namespace Prefix: | hxl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=hxl_UnitedStatesNonqualifiedPensionPlansOfUSEntityDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=hxl_UnitedStatesRetireeMedicalPlansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=hxl_UnitedKingdomDefinedBenefitPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |