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Pension and Savings Plans - Weighted-average Assumptions Used to Determine Net Periodic Benefit Cost (Details) - Pension Plan
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Weighted-average assumptions used to determine benefit obligations      
Discount rate 2.95% 2.60%  
Weighted-average assumptions used to determine net periodic benefit cost      
Discount rate 2.60% 3.40% 4.35%
Expected long-term return on plan assets 2.80% 3.60% 4.20%