{"iri":"http://fasb.org/us-gaap/2026#DefinedBenefitPlanChangeInBenefitObligationRollForward","label":"Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]","definition":"A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.","license":"https://accountingfoundation.org/page/pageContent?pageId=/Termsofuse/Termsofuse.html","source":"gaap","source_url":"http://fasb.org/us-gaap/2026#DefinedBenefitPlanChangeInBenefitObligationRollForward"}