Consolidated Balance Sheet Parentheticals - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Accounts Receivable [Abstract]
Accounts Receivable (Less Allowance of $1.6 and $1.6 )	$ 1.6	$ 1.6
Common Stock [Abstract]
Common stock, shares authorized (in shares)	80,000,000.0	80,000,000.0
Common stock, shares issued (in shares)	57,600,000	57,200,000
Common stock, shares outstanding (in shares)	57,600,000	57,200,000