Shareholders' Equity (Components Of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Stockholders' Equity Note [Abstract]
Foreign currency translation adjustments	$ 1.0	$ 0.5
Derivative gain, net	0.5	9.5
Pension and postretirement adjustments	(106.2)	(110.1)
Accumulated other comprehensive (loss)	$ (104.7)	$ (100.1)

Amount, after tax, of accumulated increase (decrease) in equity from transaction and other event and circumstance from nonowner source.

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Period Type:	instant