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Postretirement benefit plans
 3 Months Ended
Mar. 31, 2025
Retirement Benefits [Abstract]  
Postretirement benefit plans Postretirement benefit plans
Expenses related to defined benefit and retiree health care benefit plans are as follows:
U.S. Defined BenefitU.S. Retiree Health CareNon-U.S. Defined Benefit
For Three Months Ended March 31,202520242025202420252024
Service cost$2 $2 $— $— $4 $4 
Interest cost6 6 3 3 14 14 
Expected return on plan assets(4)(6)(3)(3)(18)(19)
Recognized net actuarial losses (gains)2 1 — (1)1 3 
Net periodic benefit costs (credits)$6 $3 $— $(1)$1 $2