Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Consolidated Balance Sheets [Abstract]
Trade receivables, allowances	$ 13.4	$ 9.1
Common stock, stated value per share	$ 20.00	$ 20.00
Authorized	50,000,000	50,000,000
Issued to voting trustees	22,085,481	18,956,496
Issued to shareholders	4,568,288	3,929,845
In treasury, at cost	(63,563)	(53,108)
Outstanding Common Stock	26,590,206	22,833,233
Common shares subscribed	1,185,564	1,056,109
Less subscription receivable	(1,185,564)	(1,056,109)