10-K Earnings Per Share (Denominator For Basic And Diluted Earnings Per Share) (Details) - shares shares in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share [Abstract]
Denominator for basic earnings per share - weighted-average shares	235.3	239.6	236.4	240.5	240.0	243.8	250.8
Effect of dilutive securities – employee stock options, nonvested restricted stock awards and convertible debentures	1.2	2.6	1.6	2.8	2.8	3.0	3.5
Denominator for diluted earnings per share	236.5	242.2	238.0	243.3	242.8	246.8	254.3