Income Taxes (Provision For Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Federal, Current	$ (6.1)	$ 0.0	$ 0.0
Federal, Deferred	3.7	(34.0)	0.0
Federal, Total	(2.4)	(34.0)	0.0
Foreign, Current	182.3	130.6	128.5
Foreign, Deferred	(53.0)	3.8	(4.2)
Foreign, Total	129.3	134.4	124.3
State and other, Current	3.0	0.3	0.3
State and other, Deferred	0.0	0.0	0.0
State and other, Total	3.0	0.3	0.3
Total	$ 129.9	$ 100.7	$ 124.6