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No authoritative reference available. false 9 Decreases in tax positions for current year relating to acquisition 2 life_DecreasesInTaxPositionsForCurrentYearRelatingToAcquisition life false debit duration Decreases In Tax Positions For Current Year Relating To Acquisition. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false true false false -13908000 -13908000 false false false 3 false false false false 0 0 false false false 4 false true false false -11534000 -11534000 false false false xbrli:monetaryItemType monetary Decreases In Tax Positions For Current Year Relating To Acquisition. No authoritative reference available. false 10 Decreases in tax positions due to settlements with taxing authorities 2 us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false true false false -4593000 -4593000 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false xbrli:monetaryItemType monetary The gross amount of decreases in unrecognized tax benefits resulting from settlements with taxing authorities. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a false 12 Income Taxes (Textuals) [Abstract] 1 life_IncomeTaxesTextualsAbstract life false na duration Income Taxes Textuals. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false xbrli:stringItemType string Income Taxes Textuals. false 13 Effective tax rate 2 us-gaap_EffectiveIncomeTaxRateContinuingOperations us-gaap true na duration No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false true false false 0.147 0.147 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false us-types:percentItemType pure A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations. 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No authoritative reference available. false 16 Unrecognized Tax Benefits 2 us-gaap_UnrecognizedTaxBenefits us-gaap true credit instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 127927000 127927000 false false false 2 false true false false 127927000 127927000 false false false 3 false false false false 0 0 false false false 4 false true false false 121644000 121644000 false false false xbrli:monetaryItemType monetary The gross amount of unrecognized tax benefits (tax reductions recognized in financial reports but excluded from tax returns) pertaining to uncertain tax positions taken in tax returns as of the beginning balance sheet date, excluding amounts pertaining to examined tax returns. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph b false 18 Gross uncertain tax benefits associated with current year acquisitions 2 life_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRateAssociatedWithCurrentYearAcquisitions life false credit instant Unrecognized tax benefits that would impact effective tax rate associated with current year acquisitions. false false false false false false false false false false false verboselabel false 1 false true false false 1200000 1200000 false false false 2 false true false false 1200000 1200000 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false xbrli:monetaryItemType monetary Unrecognized tax benefits that would impact effective tax rate associated with current year acquisitions. No authoritative reference available. false 19 Income tax examination, penalties and interest 2 us-gaap_IncomeTaxExaminationPenaltiesAndInterestExpense us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false true false false 100000 100000 false false false 3 false true false false 5100000 5100000 false false false 4 false false false false 0 0 false false false xbrli:monetaryItemType monetary The sum of the amounts of estimated penalties and interest recognized in the period arising from income tax examinations. No authoritative reference available. false 20 Income tax examination, penalties and interest accrued 2 us-gaap_IncomeTaxExaminationPenaltiesAndInterestAccrued us-gaap true credit instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 11000000 11000000 false false false 2 false true false false 11000000 11000000 false false false 3 false false false false 0 0 false false false 4 false true false false 9800000 9800000 false false false xbrli:monetaryItemType monetary The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations. No authoritative reference available. false 21 Significant reduction in unrecognized tax benefits is reasonably possible 2 us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleEstimatedRangeOfChange us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 true true false false 34600000 34600000 false false false 2 true true false false 34600000 34600000 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false xbrli:monetaryItemType monetary For a tax position taken for which it is reasonably possible that the total amount of unrecognized tax benefit will significantly increase or decrease within twelve months of the balance sheet date, provide an estimate of the range of the reasonably possible change. 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