Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Receivables allowance	$ 4.8	$ 3.9
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, authorized shares (in shares)	5,000,000	5,000,000
Preferred stock, unissued shares (in shares)	5,000,000	5,000,000
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, authorized shares (in shares)	200,000,000	200,000,000
Common stock, shares outstanding (in shares)	45,400,000	47,700,000
Treasury, shares (in shares)	33,200,000	30,900,000