Income Taxes - (Provision For Income Taxes From Continuing Operations) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal U.S.	$ 20.0	$ 34.9	$ 102.7
Non-U.S.	41.3	26.0	28.7
State and local	5.5	7.8	12.4
Deferred:
Federal U.S.	0.2	4.9	(70.9)
Non-U.S.	(9.2)	(4.3)	12.5
State and local	0.1	1.1	0.2
Income tax provision	$ 57.9	$ 70.4	$ 85.6