Revenue Recognition, Disaggregation of Net Sales (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenue recognition
Net sales	$ 2,377.1	$ 1,862.0
United States
Revenue recognition
Net sales	673.9	615.4
China
Revenue recognition
Net sales	660.9	417.7
Other foreign locations
Revenue recognition
Net sales	1,042.3	828.9
End customers and contract manufacturers
Revenue recognition
Net sales	2,013.3	1,554.7
Distributors and resellers
Revenue recognition
Net sales	363.8	307.3
Interconnect Products and Assemblies
Revenue recognition
Net sales	2,280.0	1,779.0
Interconnect Products and Assemblies | United States
Revenue recognition
Net sales	621.7	571.4
Interconnect Products and Assemblies | China
Revenue recognition
Net sales	657.7	416.9
Interconnect Products and Assemblies | Other foreign locations
Revenue recognition
Net sales	1,000.6	790.7
Interconnect Products and Assemblies | End customers and contract manufacturers
Revenue recognition
Net sales	1,931.0	1,488.6
Interconnect Products and Assemblies | Distributors and resellers
Revenue recognition
Net sales	349.0	290.4
Cable Products and Solutions
Revenue recognition
Net sales	97.1	83.0
Cable Products and Solutions | United States
Revenue recognition
Net sales	52.2	44.0
Cable Products and Solutions | China
Revenue recognition
Net sales	3.2	0.8
Cable Products and Solutions | Other foreign locations
Revenue recognition
Net sales	41.7	38.2
Cable Products and Solutions | End customers and contract manufacturers
Revenue recognition
Net sales	82.3	66.1
Cable Products and Solutions | Distributors and resellers
Revenue recognition
Net sales	$ 14.8	$ 16.9