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ASU 2018-14 Transition [Abstract]

Name	ASU201814TransitionAbstract
Namespace	http://fasb.org/us-gaap/2021-01-31
Prefix	us-gaap
Data type	xbrli:stringItemType
Period type	duration
Substitution Group	xbrli:item
Balance	None
Nillable	True
Abstract	True

Labels

Text	Lang	Role	Container role
ASU 2018-14 Transition [Abstract]	en-US	http://www.xbrl.org/2003/role/label	http://www.xbrl.org/2003/role/link

References

Name	Value	Role
elementCreationTaxonomyVersion	2021	http://fasb.org/us-gaap/role/tin/taxonomyImplementationNote
SourceName	Disclosure Framework-Defined Benefit Plans:Taxonomy Technical Improvement	http://fasb.org/srt/role/changeNote/changeNote
TaxonomyVersion	2021	http://fasb.org/srt/role/changeNote/changeNote
ChangeDate	2020-09	http://fasb.org/srt/role/changeNote/changeNote
NewElement	true	http://fasb.org/srt/role/changeNote/changeNote
Source_ASU_Number	2018-14	http://fasb.org/srt/role/changeNote/changeNote

Related Child Concepts

	Name	Relation Type	Role
	Defined Benefit Plan, Effect of One Percentage Point Increase on Service and Interest Cost Components `us-gaap:DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components `us-gaap:DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents1`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation `us-gaap:DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation `us-gaap:DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation1`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rate [Abstract] `us-gaap:DefinedBenefitPlanEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesAbstract`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block] `us-gaap:ScheduleOfEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesTableTextBlock`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Defined Benefit Plan, Plan Assets, Employer, Related Party Transaction, Type [Extensible Enumeration] `us-gaap:DefinedBenefitPlanPlanAssetsEmployerRelatedPartyTransactionTypeExtensibleList`	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, Expected Amortization of Gain (Loss), Next Fiscal Year `us-gaap:DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Defined Benefit Plan, Expected Amortization of Prior Service Cost (Credit), Next Fiscal Year `us-gaap:DefinedBenefitPlanExpectedAmortizationOfPriorServiceCostCreditNextFiscalYear`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Defined Benefit Plan, Expected Amortization of Transition Asset (Obligation), Next Fiscal Year `us-gaap:DefinedBenefitPlanExpectedAmortizationOfTransitionAssetObligationNextFiscalYear`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Defined Benefit Plan, Expected Amortization, Next Fiscal Year `us-gaap:DefinedBenefitPlanExpectedAmortizationNextFiscalYear`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Defined Benefit Plan, Expected Amortization, Next Fiscal Year [Abstract] `us-gaap:DefinedBenefitPlanAmountsThatWillBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossInNextFiscalYearAbstract`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block] `us-gaap:ScheduleOfAmountsInAccumulatedOtherComprehensiveIncomeLossToBeRecognizedOverNextFiscalYearTableTextBlock`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Defined Benefit Plan, Plan Assets, Expected to be Returned to Employer, Amount `us-gaap:DefinedBenefitPlanAssetsExpectedToBeReturnedToEmployerAmount`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Japanese Welfare Pension Insurance Law, Government Subsidy `us-gaap:JapaneseWelfarePensionInsuranceLawGovernmentSubsidies`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Japanese Welfare Pension Insurance Law, Previously Accrued Salary Progression Derecognition `us-gaap:JapaneseWelfarePensionInsuranceLawPreviouslyAccruedSalaryProgressionDerecognition`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Japanese Welfare Pension Insurance Law [Abstract] `us-gaap:JapaneseWelfarePensionInsuranceLawAbstract`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits

Related Parent Concepts

	Name	Relation Type	Role
	Retirement Benefits [Abstract] `us-gaap:CompensationAndRetirementDisclosureAbstract`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits