Reportable Business Segments and International Operations, Geographic information (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues and long-lived assets by geographical area
Net sales	$ 1,943.9	$ 1,840.8	$ 1,666.5	$ 1,560.1	$ 1,651.1	$ 1,635.9	$ 1,548.2	$ 1,451.2	$ 7,011.3	$ 6,286.4	$ 5,568.7
Property, plant and equipment, net	816.8				711.4				816.8	711.4	$ 609.5
Net sales | Customer risk | Largest Customer
Concentration risk
Concentration of net sales (as a percent)											11.00%
U.S.
Revenues and long-lived assets by geographical area
Net sales									1,978.4	1,740.7	$ 1,696.3
Property, plant and equipment, net	212.7				209.2				212.7	209.2	214.4
China
Revenues and long-lived assets by geographical area
Net sales									2,067.3	1,865.6	1,675.5
Property, plant and equipment, net	244.7				200.1				244.7	200.1	151.4
Other international locations
Revenues and long-lived assets by geographical area
Net sales									2,965.6	2,680.1	2,196.9
Property, plant and equipment, net	$ 359.4				$ 302.1				$ 359.4	$ 302.1	$ 243.7