Income Taxes (Provision For Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current
United States	$ (4.7)	$ 34.7	$ 52.1
Outside United States	164.8	317.0	321.8
Total current income taxes	160.1	351.7	373.9
Deferred
United States	(3.1)	2.6	19.5
Outside United States	(3.6)	(78.0)	29.3
Total deferred income taxes	(6.7)	(75.4)	48.8
Provision for income taxes	$ 153.4	$ 276.3	$ 422.7