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Post-Employment Benefits (Tables)
 9 Months Ended
Sep. 30, 2025
Postemployment Benefits [Abstract]  
Schedule of Net Periodic Benefit Costs Net costs recognized for Abbott’s major defined benefit plans and post-employment medical and dental benefit plans are as follows:
Defined Benefit PlansMedical and Dental Plans
Three Months Ended September 30,Nine Months Ended September 30,Three Months Ended September 30,Nine Months Ended September 30,
(in millions)20252024202520242025202420252024
Service cost - benefits earned during the period$55 $61 $162 $182 $11 $9 $32 $29 
Interest cost on projected benefit obligations124 118 369 352 17 13 51 40 
Expected return on plan assets(282)(263)(841)(788)(7)(6)(20)(18)
Net amortization of:
Actuarial loss, net2 6 6 18 — — — (1)
Prior service cost (credit)— — 1 1 (2)(3)(7)(10)
Net cost (credit)$(101)$(78)$(303)$(235)$19 $13 $56 $40