Income Taxes (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]
Balance at January 1	$ 435.2	$ 447.1	$ 602.5
Additions for tax positions of prior years	8.5	0.0	12.9
Effects of business acquisitions	6.9	0.0	0.0
Reductions for tax positions of prior years	(5.9)	(11.2)	(170.0)
Settlements with tax authorities	(4.0)	0.0	0.0
Additions based on tax positions related to the current year	2.2	1.7	14.3
Foreign currency translation	1.5
Foreign currency translation		(2.3)	(8.7)
Lapse of statute of limitations	0.0	(0.1)	(3.9)
Balance at December 31	$ 444.4	$ 435.2	$ 447.1