Business Segment Information (Summary of Operations by Reportable Segments) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net revenues	$ 655.0	$ 613.1
Segment operating income	130.2	116.7
Operating income	108.0	98.7
Interest expense	13.7	12.9
Other income, net	1.1	0.4
Earnings before income taxes	95.4	86.2
Americas
Net revenues	475.3	439.1
Segment operating income	120.9	109.7
EMEIA
Net revenues	142.9	150.3
Segment operating income	10.8	8.5
Asia Pacific
Net revenues	36.8	23.7
Segment operating income	(1.5)	(1.5)
Corporate, Non-Segment
Unallocated corporate expense	$ (22.2)	$ (18.0)