Revenue Recognition, Disaggregation of Net Sales (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenue recognition
Net sales	$ 1,958.5	$ 1,866.9
United States
Revenue recognition
Net sales	578.9	527.0
China
Revenue recognition
Net sales	523.2	528.0
Other foreign locations
Revenue recognition
Net sales	856.4	811.9
End customers and contract manufacturers
Revenue recognition
Net sales	1,665.7	1,585.6
Distributors and resellers
Revenue recognition
Net sales	292.8	281.3
Interconnect Products and Assemblies
Revenue recognition
Net sales	1,862.7	1,770.0
Interconnect Products and Assemblies | United States
Revenue recognition
Net sales	534.0	479.2
Interconnect Products and Assemblies | China
Revenue recognition
Net sales	522.4	527.2
Interconnect Products and Assemblies | Other foreign locations
Revenue recognition
Net sales	806.3	763.6
Interconnect Products and Assemblies | End customers and contract manufacturers
Revenue recognition
Net sales	1,592.8	1,515.6
Interconnect Products and Assemblies | Distributors and resellers
Revenue recognition
Net sales	269.9	254.4
Cable Products and Solutions
Revenue recognition
Net sales	95.8	96.9
Cable Products and Solutions | United States
Revenue recognition
Net sales	44.9	47.8
Cable Products and Solutions | China
Revenue recognition
Net sales	0.8	0.8
Cable Products and Solutions | Other foreign locations
Revenue recognition
Net sales	50.1	48.3
Cable Products and Solutions | End customers and contract manufacturers
Revenue recognition
Net sales	72.9	70.0
Cable Products and Solutions | Distributors and resellers
Revenue recognition
Net sales	$ 22.9	$ 26.9