Revenue Recognition, Disaggregation of Net Sales (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue recognition
Net sales	$ 2,323.4	$ 2,100.6	$ 6,172.9	$ 6,074.4
United States
Revenue recognition
Net sales	668.8	667.9	1,854.0	1,879.6
China
Revenue recognition
Net sales	720.8	594.5	1,782.9	1,660.2
Other foreign locations
Revenue recognition
Net sales	933.8	838.2	2,536.0	2,534.6
End customers and contract manufacturers
Revenue recognition
Net sales	1,958.7	1,790.1	5,164.3	5,164.5
Distributors and resellers
Revenue recognition
Net sales	364.7	310.5	1,008.6	909.9
Interconnect Products and Assemblies
Revenue recognition
Net sales	2,221.9	2,000.8	5,899.4	5,789.0
Interconnect Products and Assemblies | United States
Revenue recognition
Net sales	607.8	613.6	1,695.1	1,736.3
Interconnect Products and Assemblies | China
Revenue recognition
Net sales	719.0	593.2	1,778.6	1,656.1
Interconnect Products and Assemblies | Other foreign locations
Revenue recognition
Net sales	895.1	794.0	2,425.7	2,396.6
Interconnect Products and Assemblies | End customers and contract manufacturers
Revenue recognition
Net sales	1,872.9	1,710.1	4,935.6	4,944.2
Interconnect Products and Assemblies | Distributors and resellers
Revenue recognition
Net sales	349.0	290.7	963.8	844.8
Cable Products and Solutions
Revenue recognition
Net sales	101.5	99.8	273.5	285.4
Cable Products and Solutions | United States
Revenue recognition
Net sales	61.0	54.3	158.9	143.3
Cable Products and Solutions | China
Revenue recognition
Net sales	1.8	1.3	4.3	4.1
Cable Products and Solutions | Other foreign locations
Revenue recognition
Net sales	38.7	44.2	110.3	138.0
Cable Products and Solutions | End customers and contract manufacturers
Revenue recognition
Net sales	85.8	80.0	228.7	220.3
Cable Products and Solutions | Distributors and resellers
Revenue recognition
Net sales	$ 15.7	$ 19.8	$ 44.8	$ 65.1