Income Taxes (Provision For Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Federal, Current	$ (9.0)	$ (6.1)	$ 0.0
Federal, Deferred	8.5	3.7	(34.0)
Federal, Total	(0.5)	(2.4)	(34.0)
Foreign, Current	79.0	182.3	130.6
Foreign, Deferred	28.9	(53.0)	3.8
Foreign, Total	107.9	129.3	134.4
State and other, Current	(4.3)	3.0	0.3
State and other, Deferred	0.0	0.0	0.0
State and other, Total	(4.3)	3.0	0.3
Total	$ 103.1	$ 129.9	$ 100.7