Revenue Recognition, Disaggregation of Net Sales (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue recognition
Net sales	$ 2,818.5	$ 2,323.4	$ 7,849.5	$ 6,172.9
United States
Revenue recognition
Net sales	830.0	668.8	2,283.0	1,854.0
China
Revenue recognition
Net sales	778.8	720.8	2,129.9	1,782.9
Other foreign locations
Revenue recognition
Net sales	1,209.7	933.8	3,436.6	2,536.0
End customers and contract manufacturers
Revenue recognition
Net sales	2,324.0	1,958.7	6,524.3	5,164.3
Distributors and resellers
Revenue recognition
Net sales	494.5	364.7	1,325.2	1,008.6
Interconnect Products and Assemblies
Revenue recognition
Net sales	2,699.2	2,221.9	7,520.5	5,899.4
Interconnect Products and Assemblies | United States
Revenue recognition
Net sales	760.2	607.8	2,103.6	1,695.1
Interconnect Products and Assemblies | China
Revenue recognition
Net sales	775.8	719.0	2,121.1	1,778.6
Interconnect Products and Assemblies | Other foreign locations
Revenue recognition
Net sales	1,163.2	895.1	3,295.8	2,425.7
Interconnect Products and Assemblies | End customers and contract manufacturers
Revenue recognition
Net sales	2,222.9	1,872.9	6,248.8	4,935.6
Interconnect Products and Assemblies | Distributors and resellers
Revenue recognition
Net sales	476.3	349.0	1,271.7	963.8
Cable Products and Solutions
Revenue recognition
Net sales	119.3	101.5	329.0	273.5
Cable Products and Solutions | United States
Revenue recognition
Net sales	69.8	61.0	179.4	158.9
Cable Products and Solutions | China
Revenue recognition
Net sales	3.0	1.8	8.8	4.3
Cable Products and Solutions | Other foreign locations
Revenue recognition
Net sales	46.5	38.7	140.8	110.3
Cable Products and Solutions | End customers and contract manufacturers
Revenue recognition
Net sales	101.1	85.8	275.5	228.7
Cable Products and Solutions | Distributors and resellers
Revenue recognition
Net sales	$ 18.2	$ 15.7	$ 53.5	$ 44.8