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Pension and other postretirement benefits - Schedule of Expected Future Benefit Payments (Details)
$ in Millions
Dec. 31, 2023
USD ($)
OPEB  
Defined Benefit Plan Disclosure [Line Items]  
2024 $ 6
2025 6
2026 6
2027 6
2028 6
2029-2033 34
Employer contributions 6
United States | Pension Plans  
Defined Benefit Plan Disclosure [Line Items]  
2024 36
2025 37
2026 37
2027 37
2028 36
2029-2033 176
Employer contributions 2
Non-U.S. | Pension Plans  
Defined Benefit Plan Disclosure [Line Items]  
2024 100
2025 104
2026 107
2027 111
2028 114
2029-2033 598
Employer contributions $ 37