Earnings Per Common Share And Share Awards Share-Based Valuation Assumptions (Details) - SARs	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life in years		7 years
Volatility	36.60%	35.60%
Interest rate	3.70%	3.20%
Yield rate	1.20%	0.60%
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life in years	6 years 2 months 12 days
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life in years	7 years