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Postretirement benefit plans
 6 Months Ended
Jun. 30, 2023
Retirement Benefits [Abstract]  
Postretirement benefit plans Postretirement benefit plansExpenses 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 June 30,202320222023202220232022
Service cost$2 $4 $1 $— $4 $6 
Interest cost7 6 3 2 15 9 
Expected return on plan assets(5)(8)(4)(2)(17)(17)
Recognized net actuarial losses (gains)1 1 (2)— 3 — 
Net periodic benefit costs (credits)5 3 (2)— 5 (2)
Settlement losses1 11 — — 1 8 
Total, including other postretirement losses (gains)$6 $14 $(2)$— $6 $6 
U.S. Defined BenefitU.S. Retiree Health CareNon-U.S. Defined Benefit
For Six Months Ended June 30,202320222023202220232022
Service cost$4 $8 $1 $1 $8 $13 
Interest cost14 12 7 5 29 19 
Expected return on plan assets(11)(16)(9)(6)(32)(35)
Recognized net actuarial losses (gains)3 1 (3)— 6 — 
Net periodic benefit costs (credits)10 5 (4)— 11 (3)
Settlement losses1 13 — — 1 9 
Total, including other postretirement losses (gains)$11 $18 $(4)$— $12 $6