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Benefit Plans - Estimated future benefit payments (Details) $ in Millions | Dec. 31, 2019 USD ($)
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Pension benefits |
Estimated future benefit payments |
2019 | $ 600
2020 | 629
2021 | 636
2022 | 634
2023 | 626
2025-2029 | 2,401
Total benefit payments | 5,526
Postretirement benefits |
Estimated future benefit payments |
2019 | 23
2020 | 24
2021 | 26
2022 | 27
2023 | 27
2025-2029 | 136
Total benefit payments | $ 263

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