v3.26.3
Post-retirement Benefit Plans - Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Defined Benefit Plan Disclosure        
Total net periodic benefit cost $ 5 $ 5 $ 12 $ 13
United States        
Defined Benefit Plan Disclosure        
Service cost 0 1 1 2
Interest cost 2 2 4 4
Expected return on plan assets (2) (1) (4) (4)
Amortization of net actuarial gain 1 0 2 1
Total net periodic benefit cost 1 2 3 3
International        
Defined Benefit Plan Disclosure        
Service cost 2 2 7 7
Interest cost 5 4 14 12
Expected return on plan assets (3) (3) (10) (9)
Amortization of net actuarial gain 0 0 (2) 0
Total net periodic benefit cost $ 4 $ 3 $ 9 $ 10