CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022
Statement of Stockholders' Equity [Abstract]
Pension and other postretirement adjustments, tax	$ (0.4)	$ 0.2	$ 0.5	$ 0.2
Issuance of common stock from performance share units and exercise of stock options (in shares)	26,763	84,666	42,408	73,755
Issuance of common stock from exercise of stock options and deferred compensation plans, tax amount	$ 0.3	$ 1.8	$ 0.4	$ 1.7
Repurchase of common stock (in shares)	5,400		474,690	147,500
Cash dividends declared, per common share outstanding (in dollars per share)	$ 1.28		$ 1.20