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Defined Benefit Plan, Additional Information [Abstract]

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Name	DefinedBenefitPlanAdditionalInformationAbstract
Namespace	http://fasb.org/us-gaap/2020-01-31
Prefix	us-gaap
Data type	xbrli:stringItemType
Period type	duration
Substitution Group	xbrli:item
Balance	None
Nillable	True
Abstract	True

Text	Lang	Role	Container role
Defined Benefit Plan, Additional Information [Abstract]	en-US	http://www.xbrl.org/2003/role/label	http://www.xbrl.org/2003/role/link

Name	Relation Type	Role
Defined Benefit Plan, Accumulated Benefit Obligation `us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Abstract] `us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
Defined Benefit Plan, Pension Plan with Project Benefit Obligation in Excess of Plan Assets [Abstract] `us-gaap:DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAbstract`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
Defined Benefit Plan, Funded Percentage `us-gaap:DefinedBenefitPlanFundedPercentage`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
Defined Benefit Plan, Changes in Benefit Obligation and Plan Assets, Description `us-gaap:DefinedBenefitPlanExplanationOfSignificantChangeInBenefitObligationOrPlanAssetsNotApparentFromOtherRequiredDisclosures`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
Defined Benefit Plan, Estimated Future Retirement Benefits Covered by Insurance Contract, Amount `us-gaap:DefinedBenefitPlanEstimatedAmountOfPlanParticipantsFutureBenefitsCoveredByInsuranceContractsIssuedByEmployerOrRelatedParties`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
Defined Benefit Plan, Related Party Transaction, Description `us-gaap:DefinedBenefitPlanSignificantTransactionsBetweenEmployerOrRelatedPartiesAndPlanDuringYear`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
Defined Benefit Plan, Alternative Method Used to Amortize Prior Service Cost, Description `us-gaap:DefinedBenefitPlanAlternativeMethodUsedToAmortizePriorServiceAmounts`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
Defined Benefit Plan, Alternative Method Used to Amortize Gain (Loss), Description `us-gaap:DefinedBenefitPlanAlternativeMethodUsedToAmortizeNetGainsAndLosses`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
Defined Benefit Plan, Substantive Commitment Used as Basis for Accounting for Benefit Obligation, Description `us-gaap:DefinedBenefitPlanDescriptionOfAnySubstantiveCommitmentUsedAsBasisForAccountingForBenefitObligation`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
Defined Benefit Plan, Government's Rights to Plan Assets in Event of Plan Termination, Description `us-gaap:DefinedBenefitPlanGovernmentsRightsToPlanAssetsInEventOfPlanTermination`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
Defined Benefit Plan, Government's Rights to Plan Assets in Event of Plan Termination, Amount `us-gaap:DefinedBenefitPlanGovernmentsRightsToPlanAssetsInEventOfPlanTerminationAmount`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
Defined Benefit Plan, Method to Determine Vested Benefit Obligation, Description `us-gaap:DefinedBenefitPlanPensionMethodToDetermineVestedBenefitObligation`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
Defined Benefit Plan, Unfunded Plan `us-gaap:DefinedBenefitPlanUnfundedPlan`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
Defined Benefit Plan, Plan Amendment [Abstract] `us-gaap:DefinedBenefitPlanPlanAmendmentAbstract`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
Defined Benefit Plan, Settlement and Curtailment [Abstract] `us-gaap:DefinedBenefitPlanSettlementsAndCurtailmentsAbstract`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
Defined Benefit Plan, Special and Contractual Termination Benefits [Abstract] `us-gaap:DefinedBenefitPlanSpecialOrContractualTerminationBenefitsDuringPeriodAbstract`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
Defined Benefit Plan, Postretirement Medical Plan with Prescription Drug Benefits [Abstract] `us-gaap:PostretirementMedicalPlansWithPrescriptionDrugBenefitsAbstract`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
Defined Benefit Plan, Accumulated Benefit Obligation `us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfDefinedBenefitPlansDisclosuresTable
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Abstract] `us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfDefinedBenefitPlansDisclosuresTable
Defined Benefit Plan, Pension Plan with Project Benefit Obligation in Excess of Plan Assets [Abstract] `us-gaap:DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAbstract`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfDefinedBenefitPlansDisclosuresTable
Defined Benefit Plan, Funded Percentage `us-gaap:DefinedBenefitPlanFundedPercentage`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfDefinedBenefitPlansDisclosuresTable
Defined Benefit Plan, Changes in Benefit Obligation and Plan Assets, Description `us-gaap:DefinedBenefitPlanExplanationOfSignificantChangeInBenefitObligationOrPlanAssetsNotApparentFromOtherRequiredDisclosures`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfDefinedBenefitPlansDisclosuresTable
Defined Benefit Plan, Estimated Future Retirement Benefits Covered by Insurance Contract, Amount `us-gaap:DefinedBenefitPlanEstimatedAmountOfPlanParticipantsFutureBenefitsCoveredByInsuranceContractsIssuedByEmployerOrRelatedParties`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfDefinedBenefitPlansDisclosuresTable
Defined Benefit Plan, Related Party Transaction, Description `us-gaap:DefinedBenefitPlanSignificantTransactionsBetweenEmployerOrRelatedPartiesAndPlanDuringYear`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfDefinedBenefitPlansDisclosuresTable
Defined Benefit Plan, Alternative Method Used to Amortize Prior Service Cost, Description `us-gaap:DefinedBenefitPlanAlternativeMethodUsedToAmortizePriorServiceAmounts`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfDefinedBenefitPlansDisclosuresTable
Defined Benefit Plan, Alternative Method Used to Amortize Gain (Loss), Description `us-gaap:DefinedBenefitPlanAlternativeMethodUsedToAmortizeNetGainsAndLosses`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfDefinedBenefitPlansDisclosuresTable
Defined Benefit Plan, Substantive Commitment Used as Basis for Accounting for Benefit Obligation, Description `us-gaap:DefinedBenefitPlanDescriptionOfAnySubstantiveCommitmentUsedAsBasisForAccountingForBenefitObligation`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfDefinedBenefitPlansDisclosuresTable
Defined Benefit Plan, Government's Rights to Plan Assets in Event of Plan Termination, Description `us-gaap:DefinedBenefitPlanGovernmentsRightsToPlanAssetsInEventOfPlanTermination`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfDefinedBenefitPlansDisclosuresTable
Defined Benefit Plan, Government's Rights to Plan Assets in Event of Plan Termination, Amount `us-gaap:DefinedBenefitPlanGovernmentsRightsToPlanAssetsInEventOfPlanTerminationAmount`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfDefinedBenefitPlansDisclosuresTable
Defined Benefit Plan, Method to Determine Vested Benefit Obligation, Description `us-gaap:DefinedBenefitPlanPensionMethodToDetermineVestedBenefitObligation`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfDefinedBenefitPlansDisclosuresTable
Defined Benefit Plan, Unfunded Plan `us-gaap:DefinedBenefitPlanUnfundedPlan`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfDefinedBenefitPlansDisclosuresTable
Defined Benefit Plan, Plan Amendment [Abstract] `us-gaap:DefinedBenefitPlanPlanAmendmentAbstract`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfDefinedBenefitPlansDisclosuresTable
Defined Benefit Plan, Settlement and Curtailment [Abstract] `us-gaap:DefinedBenefitPlanSettlementsAndCurtailmentsAbstract`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfDefinedBenefitPlansDisclosuresTable
Defined Benefit Plan, Special and Contractual Termination Benefits [Abstract] `us-gaap:DefinedBenefitPlanSpecialOrContractualTerminationBenefitsDuringPeriodAbstract`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfDefinedBenefitPlansDisclosuresTable
Defined Benefit Plan, Postretirement Medical Plan with Prescription Drug Benefits [Abstract] `us-gaap:PostretirementMedicalPlansWithPrescriptionDrugBenefitsAbstract`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfDefinedBenefitPlansDisclosuresTable

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	Name	Relation Type	Role
	Defined Benefit Plan Disclosure [Line Items] `us-gaap:DefinedBenefitPlanDisclosureLineItems`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Defined Benefit Plan Disclosure [Line Items] `us-gaap:DefinedBenefitPlanDisclosureLineItems`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfDefinedBenefitPlansDisclosuresTable