Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Allowances for accounts receivable	$ 16.9	$ 16.5
Preferred stock, shares authorized (Class I & Class II Preferred stock) (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Company common shares authorized (in shares)	200,000,000	200,000,000
Common shares, shares issued (in shares)	77,090,104	75,834,668
Treasury shares (in shares)	1,715,282	158,836