Earnings Per Share (Reconciliation of Basic Shares Outstanding to Diluted Shares Outstanding) (Details) - shares shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings Per Share [Abstract]
Basic shares outstanding	46.1	47.5	46.6	47.7
Dilutive effect of common stock equivalents	0.0	0.3	0.1	0.3
Diluted shares outstanding	46.1	47.8	46.7	48.0