Shares and Stockholders' Equity - Changes in Common Stock (Details) - shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance as of beginning-of-year (in shares)	169,220,511	177,193,515	192,329,691
Stock compensation/issued for benefit plans (in shares)	445,626	692,491	1,106,572
Retirement/cancellation of shares (in shares)	0	(8,665,495)	(16,242,748)
Balance as of end-of-year (in shares)	169,666,137	169,220,511	177,193,515
Common Stock as of End-of-Year
Basic basis (in shares)	169,666,137	169,220,511	177,193,515
Diluted basis (in shares)	170,633,123	170,483,323	179,789,097