v3.26.1
Postretirement benefits Components of net periodic benefit costs (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Pension Plan [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans        
Service cost $ 3 $ 2 $ 5 $ 4
Non-service (benefit) cost (47) (36) (94) (71)
Net periodic benefit cost (benefit) (44) (34) (89) (67)
Other Postretirement Benefits Plan [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans        
Service cost 0 0 0 0
Interest cost 1 1 1 1
Expected return on plan assets 0 (1) 0 (1)
Defined Benefit Plan, Amortization of Gain (Loss) 0 (1) 0 (2)
Amortization of prior service cost 0 0 0 0
Settlements 0 0 0 0
Non-service (benefit) cost 1 (1) 1 (2)
Net periodic benefit cost (benefit) 1 (1) 1 (2)
Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense | Pension Plan [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans        
Service cost 3 2 5 4
Non-service (benefit) cost (42) (32) (85) (64)
Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense | Other Postretirement Benefits Plan [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans        
Service cost 0 0 0 0
Non-service (benefit) cost 1 (1) 1 (2)
Income Statement Location [Axis]: us-gaap:PolicyholderBenefitsAndClaimsIncurredNet | Pension Plan [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans        
Service cost 0 0 0 0
Non-service (benefit) cost (5) (4) (9) (7)
Income Statement Location [Axis]: us-gaap:PolicyholderBenefitsAndClaimsIncurredNet | Other Postretirement Benefits Plan [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans        
Service cost 0 0 0 0
Non-service (benefit) cost 0 0 0 0
Foreign Plan [Member] | Pension Plan [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans        
Service cost 3 2 5 4
Interest cost 9 9 18 18
Expected return on plan assets (16) (14) (32) (27)
Defined Benefit Plan, Amortization of Gain (Loss) (1) 0 (1) 0
Amortization of prior service cost 0 0 0 0
Settlements 0 0 0 0
Non-service (benefit) cost (8) (5) (15) (9)
Net periodic benefit cost (benefit) (5) (3) (10) (5)
UNITED STATES | Pension Plan [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans        
Service cost 0 0 0 0
Interest cost 31 33 62 67
Expected return on plan assets (67) (62) (135) (125)
Defined Benefit Plan, Amortization of Gain (Loss) (3) (2) (6) (4)
Amortization of prior service cost 0 0 0 0
Settlements 0 0 0 0
Non-service (benefit) cost (39) (31) (79) (62)
Net periodic benefit cost (benefit) $ (39) $ (31) $ (79) $ (62)