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Postretirement benefits (Schedule of Expected Future Benefit Payments) (Details)
$ in Millions
Dec. 31, 2021
USD ($)
Other Postretirement Benefits Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2022 $ 19
2023 15
2024 11
2025 6
2026 1
2027-2031 5
Non - U.S. | Pension Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2022 30
2023 30
2024 30
2025 32
2026 33
2027-2031 193
UNITED STATES | Pension Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2022 168
2023 173
2024 177
2025 182
2026 185
2027-2031 $ 964