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Postretirement Benefit Plans - Assumed Future Benefits Payments (Details)
$ in Millions
Dec. 31, 2021
USD ($)
U.S. | Defined Benefit  
Defined Benefit Plan Disclosure [Line Items]  
2022 $ 89
2023 96
2024 87
2025 87
2026 87
2027 - 2031 391
U.S. | Retiree Health Care  
Defined Benefit Plan Disclosure [Line Items]  
2022 28
2023 27
2024 26
2025 25
2026 24
2027 - 2031 108
Non-U.S. | Defined Benefit  
Defined Benefit Plan Disclosure [Line Items]  
2022 99
2023 101
2024 103
2025 105
2026 107
2027 - 2031 $ 566