Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Allowances for accounts receivable	$ 17.9	$ 17.9
Common stock authorized (in shares)	200,000,000	200,000,000
Common stock issued (in shares)	78,546,583	77,767,640
Treasury stock (in shares)	7,304,483	5,188,257
Preferred Class A
Preferred stock authorized (Class I & Class II Preferred stock) (in shares)	10,000,000	10,000,000
Preferred stock issued (Class I & Class II Preferred stock) (in shares)	0	0
Preferred Class B
Preferred stock authorized (Class I & Class II Preferred stock) (in shares)	10,000,000	10,000,000
Preferred stock issued (Class I & Class II Preferred stock) (in shares)	0	0