Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Condensed Consolidated Balance Sheets [Abstract]
Trade receivables, allowances	$ 12.7	$ 13.4
Common stock, stated value per share	$ 20.00	$ 20.00
Authorized	50,000,000	50,000,000
Issued to voting trustees	22,588,092	22,085,481
Issued to shareholders	4,645,980	4,568,288
In treasury, at cost	(335,700)	(63,563)
Outstanding Common Stock	26,898,372	26,590,206