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Pension Benefits, Other Postretirement Benefits and Employee Savings and Investment Plans (Estimated Future Payments) (Details)
$ in Thousands
Dec. 31, 2019
USD ($)
Pension Benefits  
Defined Benefit Plan Disclosure [Line Items]  
2020 $ 2,780
2021 1,870
2022 1,818
2023 1,832
2024 1,818
2025-2029 8,928
Other Postretirement Benefits  
Defined Benefit Plan Disclosure [Line Items]  
2020 282
2021 160
2022 121
2023 131
2024 116
2025-2029 $ 774