Revenue Recognition, Disaggregation of Net Sales (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue recognition
Net sales	$ 1,987.5	$ 2,015.3	$ 3,849.5	$ 3,973.8
United States
Revenue recognition
Net sales	569.8	632.8	1,185.2	1,211.7
China
Revenue recognition
Net sales	644.4	542.5	1,062.0	1,065.7
Other foreign locations
Revenue recognition
Net sales	773.3	840.0	1,602.3	1,696.4
End customers and contract manufacturers
Revenue recognition
Net sales	1,650.9	1,708.7	3,205.7	3,374.4
Distributors and resellers
Revenue recognition
Net sales	336.6	306.6	643.8	599.4
Interconnect Products and Assemblies
Revenue recognition
Net sales	1,898.5	1,925.6	3,677.5	3,788.3
Interconnect Products and Assemblies | United States
Revenue recognition
Net sales	515.8	588.7	1,087.2	1,122.7
Interconnect Products and Assemblies | China
Revenue recognition
Net sales	642.7	540.6	1,059.6	1,063.0
Interconnect Products and Assemblies | Other foreign locations
Revenue recognition
Net sales	740.0	796.3	1,530.7	1,602.6
Interconnect Products and Assemblies | End customers and contract manufacturers
Revenue recognition
Net sales	1,574.1	1,641.4	3,062.7	3,234.2
Interconnect Products and Assemblies | Distributors and resellers
Revenue recognition
Net sales	324.4	284.2	614.8	554.1
Cable Products and Solutions
Revenue recognition
Net sales	89.0	89.7	172.0	185.5
Cable Products and Solutions | United States
Revenue recognition
Net sales	54.0	44.1	98.0	89.0
Cable Products and Solutions | China
Revenue recognition
Net sales	1.7	1.9	2.4	2.7
Cable Products and Solutions | Other foreign locations
Revenue recognition
Net sales	33.3	43.7	71.6	93.8
Cable Products and Solutions | End customers and contract manufacturers
Revenue recognition
Net sales	76.8	67.3	143.0	140.2
Cable Products and Solutions | Distributors and resellers
Revenue recognition
Net sales	$ 12.2	$ 22.4	$ 29.0	$ 45.3