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Employee Benefit Plans - MEC - Contributions and Benefit Payments (Details)
$ in Millions
Dec. 31, 2022
USD ($)
Pension | U.S.  
Defined Benefit Plan Disclosure [Line Items]  
Projected benefit payments $ 13
2023 192
2024 184
2025 180
2026 177
2027 172
2028-2032 782
Pension | MEC | U.S.  
Defined Benefit Plan Disclosure [Line Items]  
Projected benefit payments 7
2023 59
2024 54
2025 53
2026 53
2027 51
2028-2032 231
Other Postretirement  
Defined Benefit Plan Disclosure [Line Items]  
2023 53
2024 53
2025 53
2026 52
2027 52
2028-2032 235
Other Postretirement | U.S.  
Defined Benefit Plan Disclosure [Line Items]  
Projected benefit payments 7
Other Postretirement | MEC  
Defined Benefit Plan Disclosure [Line Items]  
Projected benefit payments 2
2023 21
2024 22
2025 23
2026 23
2027 23
2028-2032 $ 105