Segment Information Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting [Abstract]
Total segment income for reportable segments	$ 220.8	$ 213.6
Corporate and other	(63.3)	(28.4)
Other interest expense	(32.3)	(28.8)
Interest income	0.2	0.4
Other income, net	0.8	3.0
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	$ 126.2	$ 159.8