10-Q Earnings Per Share (Narrative) (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]
Weighted average shares excluded from denominator for diluted earnings per share because the stock options were anti-dilutive	0.9	0.5	0.8	0.4	0.4	0.2	1.2
Restricted stock units issued under stock incentive plan			0.6		0.6
Restricted stock units excluded from the denominator for diluted earnings per share					0.2	0.3	0.3
2022 to 2024 [Member]
Restricted stock units issued under stock incentive plan		0.0		0.6
Restricted stock units excluded from the denominator for diluted earnings per share		0.0		0.2
2023 to 2025
Restricted stock units issued under stock incentive plan	0.0		0.6
Restricted stock units excluded from the denominator for diluted earnings per share	0.0		0.2