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Post-Employment Benefits (Tables)
 3 Months Ended
Mar. 31, 2024
Postemployment Benefits [Abstract]  
Schedule of Net Periodic Cost Net cost recognized for the three months ended March 31 for Abbott’s major defined benefit plans and post-employment medical and dental benefit plans is as follows:
Defined Benefit PlansMedical and Dental Plans
Three Months
Ended March 31		Three Months
Ended March 31
(in millions)2024202320242023
Service cost - benefits earned during the period$61 $60 $10 $9 
Interest cost on projected benefit obligations118 114 15 14 
Expected return on plan assets(262)(242)(6)(6)
Net amortization of:
Actuarial loss, net6 3 — — 
Prior service cost (credit)— — (3)(3)
Net cost (credit)$(77)$(65)$16 $14