Capital Stock (Schedule of Common Stock Shares Purchased and Retired) (Details) - shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Capital Stock [Abstract]
Shares of common stock purchased	735,641	794,227	824,685
Shares of common stock retired	725,186	798,166	830,338