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Defined Benefit Plan, Postretirement Medical Plan with Prescription Drug Benefits [Abstract]

Name	PostretirementMedicalPlansWithPrescriptionDrugBenefitsAbstract
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
Defined Benefit Plan, Postretirement Medical Plan with Prescription Drug Benefits [Abstract]	en-US	http://www.xbrl.org/2003/role/label	http://www.xbrl.org/2003/role/link

References

Name	Value	Role
elementCreationTaxonomyVersion	2008	http://fasb.org/us-gaap/role/tin/taxonomyImplementationNote

Related Child Concepts

	Name	Relation Type	Role
	Defined Benefit Plan, Postretirement Medical Plan with Prescription Drug Benefits, Description `us-gaap:DescriptionOfPostretirementMedicalPlansWithPrescriptionDrugBenefits`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Defined Benefit Plan, Prescription Drug Benefit Subsidy, Effect Not Determined [true false] `us-gaap:PrescriptionDrugBenefitSubsidyEffectNotDetermined`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Defined Benefit Plan, Prescription Drug Benefit, Accumulated Postretirement Benefit Obligation, Decrease for Subsidy `us-gaap:DefinedBenefitPlanPrescriptionDrugBenefitAccumulatedPostretirementBenefitObligationDecreaseForSubsidy`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Defined Benefit Plan, Prescription Drug Benefit, Net Periodic Postretirement Benefit Cost, (Increase) Decrease for Subsidy `us-gaap:PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCost1`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Defined Benefit Plan, Expected Future Prescription Drug Subsidy Receipt [Abstract] `us-gaap:DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Defined Benefit Plan, Postretirement Medical Plan with Prescription Drug Benefits, Description `us-gaap:DescriptionOfPostretirementMedicalPlansWithPrescriptionDrugBenefits`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfDefinedBenefitPlansDisclosuresTable
	Defined Benefit Plan, Prescription Drug Benefit Subsidy, Effect Not Determined [true false] `us-gaap:PrescriptionDrugBenefitSubsidyEffectNotDetermined`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfDefinedBenefitPlansDisclosuresTable
	Defined Benefit Plan, Prescription Drug Benefit, Accumulated Postretirement Benefit Obligation, Decrease for Subsidy `us-gaap:DefinedBenefitPlanPrescriptionDrugBenefitAccumulatedPostretirementBenefitObligationDecreaseForSubsidy`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfDefinedBenefitPlansDisclosuresTable
	Defined Benefit Plan, Prescription Drug Benefit, Net Periodic Postretirement Benefit Cost, (Increase) Decrease for Subsidy `us-gaap:PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCost1`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfDefinedBenefitPlansDisclosuresTable

Related Parent Concepts

	Name	Relation Type	Role
	Defined Benefit Plan, Additional Information [Abstract] `us-gaap:DefinedBenefitPlanAdditionalInformationAbstract`	parent-child	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits
	Defined Benefit Plan, Additional Information [Abstract] `us-gaap:DefinedBenefitPlanAdditionalInformationAbstract`	domain-member	http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefitsScheduleOfDefinedBenefitPlansDisclosuresTable