Acquisition of Business (Pro-forma information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Business Combinations [Abstract]
Total Revenues	$ 4,452.9	$ 4,239.0
Total Expenses	4,133.7	4,095.1
Income from Continuing Operations before Income Taxes	319.2	143.9
Net Income	$ 285.6	$ 89.0