Equity Equity (Other Comprehensive Income in Noncontrolling Interest) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Noncontrolling Interest [Line Items]
Other comprehensive income (loss), net of tax	$ 95.7	$ (130.2)	$ (6.6)
Noncontrolling interest [Member]
Noncontrolling Interest [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax, Portion Attributable to Noncontrolling Interest	(0.2)	(1.9)	(1.7)
Other comprehensive income (loss), net of tax	0.3	(1.6)	(0.5)
Accumulated Defined Benefit Plans Adjustment Attributable to Noncontrolling Interest
Noncontrolling Interest [Line Items]
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest	$ 0.5	$ 0.3	$ 1.2