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Pension and Other Postretirement Employee Benefit Plans - Estimated Future Benefit Payments (Details)
$ in Millions
Dec. 31, 2022
USD ($)
Defined benefit pension and OPEB plans  
2023 $ 1,022
2024 1,016
2025 1,007
2026 980
2027 977
Years 2028–2032 $ 4,720