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Pension (Anticipated Benefit Payments) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Defined Benefit Pension Plans and SERP  
Defined Benefit Plan Disclosure [Line Items]  
2015 $ 20,786us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= lby_DefinedBenefitPensionPlansAndSupplementalEmployeeRetirementPlansMember
2016 21,371us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= lby_DefinedBenefitPensionPlansAndSupplementalEmployeeRetirementPlansMember
2017 22,263us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= lby_DefinedBenefitPensionPlansAndSupplementalEmployeeRetirementPlansMember
2018 23,701us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= lby_DefinedBenefitPensionPlansAndSupplementalEmployeeRetirementPlansMember
2019 24,987us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= lby_DefinedBenefitPensionPlansAndSupplementalEmployeeRetirementPlansMember
2020-2024 130,985us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= lby_DefinedBenefitPensionPlansAndSupplementalEmployeeRetirementPlansMember
U.S. Plans  
Defined Benefit Plan Disclosure [Line Items]  
2015 18,287us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= lby_UnitedStatesPensionPlansOfUsEntityAndSupplementalEmployeeRetirementPlanDefinedBenefitMember
2016 18,702us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= lby_UnitedStatesPensionPlansOfUsEntityAndSupplementalEmployeeRetirementPlanDefinedBenefitMember
2017 19,423us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= lby_UnitedStatesPensionPlansOfUsEntityAndSupplementalEmployeeRetirementPlanDefinedBenefitMember
2018 20,493us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= lby_UnitedStatesPensionPlansOfUsEntityAndSupplementalEmployeeRetirementPlanDefinedBenefitMember
2019 20,742us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= lby_UnitedStatesPensionPlansOfUsEntityAndSupplementalEmployeeRetirementPlanDefinedBenefitMember
2020-2024 109,886us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= lby_UnitedStatesPensionPlansOfUsEntityAndSupplementalEmployeeRetirementPlanDefinedBenefitMember
Non-U.S. Plans  
Defined Benefit Plan Disclosure [Line Items]  
2015 2,499us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember
2016 2,669us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember
2017 2,840us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember
2018 3,208us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember
2019 4,245us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember
2020-2024 $ 21,099us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember