Pension Benefits - Actuarial Assumptions Pension Expense (Details) - Pension Plans, Defined Benefit	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Weighted-average Discount Rate	5.05%	2.89%	2.56%
Service Cost Discount Rate			2.41%
Interest Cost Discount Rate	4.92%	2.35%	1.90%
Rate of Increase in Future Compensation Levels		3.40%	3.40%
Expected Long Term Rate of Return on Plan Assets	3.79%	2.08%	2.70%