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Employee Benefits - Cash Flows (Details)
$ in Millions
Dec. 31, 2022
USD ($)
Retirement Plans  
Information about the expected cash flows for retirement and post-retirement plans and impact of the Medicare subsidy  
2023 $ 71
2024 74
2025 77
2026 80
2027 83
2028-2032 453
Postretirement Plans  
Information about the expected cash flows for retirement and post-retirement plans and impact of the Medicare subsidy  
2023 3
2024 3
2025 2
2026 2
2027 2
2028-2032 $ 7