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Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]

Name	DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward
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

Labels

Text	Lang	Role	Container role
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]	en-US	http://www.xbrl.org/2003/role/label	http://www.xbrl.org/2003/role/link
A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.	en-US	http://www.xbrl.org/2003/role/documentation	http://www.xbrl.org/2003/role/link

Related Child Concepts

	Name	Relation Type	Role
	Defined Benefit Plan, Plan Assets, Amount `us-gaap:DefinedBenefitPlanFairValueOfPlanAssets`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Actual Return (Loss) on Plan Assets Still Held `us-gaap:DefinedBenefitPlanActualReturnOnPlanAssetsStillHeld`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Actual Return (Loss) on Plan Assets Sold `us-gaap:DefinedBenefitPlanActualReturnOnPlanAssetsSoldDuringPeriod`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Purchase, Sale, and Settlement [Abstract] `us-gaap:DefinedBenefitPlanActualReturnOnPlanAssetsAbstract`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Assets Transferred into (out of) Level 3 `us-gaap:DefinedBenefitPlanTransfersBetweenMeasurementLevels`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Period Increase (Decrease) `us-gaap:DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationPeriodIncreaseDecrease`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Defined Benefit Plan, Plan Assets, Amount `us-gaap:DefinedBenefitPlanFairValueOfPlanAssets`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Defined Benefit Plan, Plan Assets, Amount `us-gaap:DefinedBenefitPlanFairValueOfPlanAssets`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsDefinedBenefitPlanPlanAssetsLevel3ReconciliationTable
	Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Actual Return (Loss) on Plan Assets Still Held `us-gaap:DefinedBenefitPlanActualReturnOnPlanAssetsStillHeld`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsDefinedBenefitPlanPlanAssetsLevel3ReconciliationTable
	Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Actual Return (Loss) on Plan Assets Sold `us-gaap:DefinedBenefitPlanActualReturnOnPlanAssetsSoldDuringPeriod`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsDefinedBenefitPlanPlanAssetsLevel3ReconciliationTable
	Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Purchase, Sale, and Settlement [Abstract] `us-gaap:DefinedBenefitPlanActualReturnOnPlanAssetsAbstract`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsDefinedBenefitPlanPlanAssetsLevel3ReconciliationTable
	Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Assets Transferred into (out of) Level 3 `us-gaap:DefinedBenefitPlanTransfersBetweenMeasurementLevels`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsDefinedBenefitPlanPlanAssetsLevel3ReconciliationTable
	Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Period Increase (Decrease) `us-gaap:DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationPeriodIncreaseDecrease`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsDefinedBenefitPlanPlanAssetsLevel3ReconciliationTable
	Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Actual Return (Loss) on Plan Assets Still Held `us-gaap:DefinedBenefitPlanActualReturnOnPlanAssetsStillHeld`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfDefinedBenefitPlansDisclosuresTable
	Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Actual Return (Loss) on Plan Assets Sold `us-gaap:DefinedBenefitPlanActualReturnOnPlanAssetsSoldDuringPeriod`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfDefinedBenefitPlansDisclosuresTable
	Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Purchase, Sale, and Settlement [Abstract] `us-gaap:DefinedBenefitPlanActualReturnOnPlanAssetsAbstract`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfDefinedBenefitPlansDisclosuresTable
	Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Assets Transferred into (out of) Level 3 `us-gaap:DefinedBenefitPlanTransfersBetweenMeasurementLevels`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfDefinedBenefitPlansDisclosuresTable
	Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Period Increase (Decrease) `us-gaap:DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationPeriodIncreaseDecrease`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfDefinedBenefitPlansDisclosuresTable

Related Parent Concepts

	Name	Relation Type	Role
	Defined Benefit Plan, Plan Assets, Level 3 Reconciliation [Line Items] `us-gaap:DefinedBenefitPlanPlanAssetsLevel3ReconciliationLineItems`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Defined Benefit Plan, Roll Forwards [Abstract] `us-gaap:DefinedBenefitPlanRollForwardsAbstract`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Defined Benefit Plan, Plan Assets, Level 3 Reconciliation [Line Items] `us-gaap:DefinedBenefitPlanPlanAssetsLevel3ReconciliationLineItems`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsDefinedBenefitPlanPlanAssetsLevel3ReconciliationTable
	Defined Benefit Plan, Roll Forwards [Abstract] `us-gaap:DefinedBenefitPlanRollForwardsAbstract`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfDefinedBenefitPlansDisclosuresTable