Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Allowances for accounts receivable	$ 17.5	$ 16.9
Common stock authorized (in shares)	200,000,000	200,000,000
Common stock issued (in shares)	77,532,871	77,090,104
Treasury stock (in shares)	4,085,379	1,715,282
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