Earnings Per Share (Narrative) (Details) - $ / shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends declared per common share	$ 3.44	$ 3.30
Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Antidilutive securities, shares	105,000	105,000