CONDENSED CONSOLIDATED STATEMENTS OF FINANCIAL POSITION (Unaudited) (Parenthetical) - USD ($) shares in Millions, $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Statement of Financial Position [Abstract]
Property, plant and equipment, accumulated depreciation	$ 403.6	$ 390.8
Capital stock, par value (in dollars per share)	$ 1	$ 1
Capital stock, authorized shares (in shares)	50.0	50.0
Capital stock, shares issued (in shares)	18.5	18.5
Capital stock, shares outstanding (in shares)	18.5	18.5