Income Taxes (Schedule of Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefit — beginning of year	$ 296.7	$ 322.9	$ 391.1
Additions for current year tax positions	0.0	8.2	0.0
Additions for prior year tax positions	3.0	1.0	0.0
Reductions for prior year tax positions	(4.6)	(5.8)	(9.1)
Settlements	(2.1)	(0.4)	(47.3)
Reductions due to expirations of statute of limitations	(13.0)	(1.9)	(7.0)
Reduction due to acquisition	0.0	(27.3)	(4.8)
Impact of foreign currency translation	(7.2)	0.0	0.0
Unrecognized tax benefit — end of year	$ 272.8	$ 296.7	$ 322.9