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Pension and Other Postretirement Benefits - Defined Benefit Plan Assumptions Used to Calculate Net Periodic Benefit Cost (Details)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Defined Benefit Pension Plans      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 2.80% 2.80% 2.70%
Expected long - term return on plan assets 5.90% 6.40% 6.30%
Postretirement Benefit Plans      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 2.60% 2.10% 2.80%
Expected long - term return on plan assets 5.90% 6.40% 5.80%
Health care trend rate assumed for next year 5.50% 5.80% 6.00%
Ultimate health care trend rate 4.20% 4.50% 4.50%
Supplemental Retirement Plans      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 2.80% 2.40% 2.40%