Net Earnings Per Share (Reconciliation of Basic Shares Outstanding to Diluted Shares Outstanding) (Details) - shares shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share [Abstract]
Basic shares outstanding	44.9	46.6	45.2	46.9
Dilutive effect of common stock equivalents	0.1	0.1	0.0	0.1
Diluted shares outstanding	45.0	46.7	45.2	47.0