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Retirement Benefits (Schedule of Estimated Future Benefit Payments for Pension and Postretirement Benefits) (Details)
$ in Millions
Dec. 31, 2021
USD ($)
U.S. | Pension  Benefits  
Defined Benefit Plan Disclosure [Line Items]  
2022 $ 300
2023 312
2024 323
2025 329
2026 335
2027-2031 1,719
U.S. | Post-retirement Benefits  
Defined Benefit Plan Disclosure [Line Items]  
2022 4
2023 3
2024 3
2025 3
2026 3
2027-2031 9
Non-U.S. | Pension  Benefits  
Defined Benefit Plan Disclosure [Line Items]  
2022 349
2023 376
2024 380
2025 391
2026 403
2027-2031 2,225
Non-U.S. | Post-retirement Benefits  
Defined Benefit Plan Disclosure [Line Items]  
2022 3
2023 3
2024 3
2025 3
2026 3
2027-2031 $ 15