Business Segment Information (Summary of Operations by Reportable Segments) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Net revenues	$ 731.2	$ 704.7	$ 1,386.2	$ 1,317.8
Operating income (loss)	145.7	143.4	253.7	242.1
Interest expense	13.4	13.4	27.1	26.3
Other expense (income), net	(0.7)	1.6	0.4	2.0
Earnings (loss) before income taxes	131.6	131.6	227.0	217.8
Americas
Segment Reporting Information [Line Items]
Net revenues	545.1	526.8	1,020.4	965.8
EMEIA
Segment Reporting Information [Line Items]
Net revenues	142.2	147.8	285.1	298.1
Asia Pacific
Segment Reporting Information [Line Items]
Net revenues	43.9	30.1	80.7	53.9
Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	164.1	164.0	294.3	280.7
Operating Segments | Americas
Segment Reporting Information [Line Items]
Operating income (loss)	161.2	152.0	282.1	261.7
Operating Segments | EMEIA
Segment Reporting Information [Line Items]
Operating income (loss)	1.6	11.2	12.4	19.7
Operating Segments | Asia Pacific
Segment Reporting Information [Line Items]
Operating income (loss)	1.3	0.8	(0.2)	(0.7)
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Operating income (loss)	$ (18.4)	$ (20.6)	$ (40.6)	$ (38.6)