Reportable Business Segments and International Operations, Geographic information (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues and long-lived assets by geographical area
Net sales	$ 2,224.7	$ 2,129.0	$ 1,981.4	$ 1,866.9	$ 1,943.9	$ 1,840.8	$ 1,666.5	$ 1,560.1	$ 8,202.0	$ 7,011.3	$ 6,286.4
Property, plant and equipment, net	875.8				816.8				875.8	816.8	711.4
United States
Revenues and long-lived assets by geographical area
Net sales									2,241.4	1,978.4	1,740.7
Property, plant and equipment, net	225.1				212.7				225.1	212.7	209.2
China
Revenues and long-lived assets by geographical area
Net sales									2,594.0	2,067.3	1,865.6
Property, plant and equipment, net	273.8				244.7				273.8	244.7	200.1
Other foreign locations
Revenues and long-lived assets by geographical area
Net sales									3,366.6	2,965.6	2,680.1
Property, plant and equipment, net	$ 376.9				$ 359.4				$ 376.9	$ 359.4	$ 302.1