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Post-Employment Benefits (Tables)
 6 Months Ended
Jun. 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 June 30,Six Months Ended June 30,Three Months Ended June 30,Six Months Ended June 30,
(in millions)20252024202520242025202420252024
Service cost - benefits earned during the period$53 $60 $107 $121 $11 $10 $21 $20 
Interest cost on projected benefit obligations123 116 245 234 18 12 34 27 
Expected return on plan assets(281)(263)(559)(525)(6)(6)(13)(12)
Net amortization of:
Actuarial loss, net2 6 4 12 — (1)— (1)
Prior service cost (credit)1 1 1 1 (3)(4)(5)(7)
Net cost (credit)$(102)$(80)$(202)$(157)$20 $11 $37 $27