Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Allowances for accounts receivable	$ 15.7	$ 17.1
Common stock authorized (in shares)	200,000,000	200,000,000
Common stock issued (in shares)	79,169,579	78,680,164
Treasury stock (in shares)	9,034,863	8,553,272
Preferred Stock Class I
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 Stock Class II
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