Common Stockholders' Equity (Schedule of Changes in Shares of Common Stock Outstanding) (Details) - shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Common Stock Shares Outstanding [Roll Forward]
Balance, beginning of year	384,817,136	396,819,150	397,756,323
Shares issued	951,930	1,059,500	1,118,418
Shares repurchased	(5,702,996)	(13,061,514)	(2,055,591)
Balance, end of year	380,066,070	384,817,136	396,819,150