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Pension Benefits - Actuarial Assumptions Pension Expense (Details) - Pension Plans, Defined Benefit
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]      
Weighted-average Discount Rate 2.56% 2.56% 4.28%
Service Cost Discount Rate 2.41% 2.42% 4.26%
Interest Cost Discount Rate 1.90% 1.89% 3.91%
Rate of Increase in Future Compensation Levels 3.40% 3.40% 3.40%
Expected Long Term Rate of Return on Plan Assets 2.70% 4.90% 5.70%