Revenue Recognition, Disaggregation of Net Sales (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue recognition
Net sales	$ 2,015.3	$ 1,981.4	$ 3,973.8	$ 3,848.3
United States
Revenue recognition
Net sales	632.8	576.3	1,211.7	1,103.3
China
Revenue recognition
Net sales	542.5	537.0	1,065.7	1,065.1
Other foreign locations
Revenue recognition
Net sales	840.0	868.1	1,696.4	1,679.9
End customers and contract manufacturers
Revenue recognition
Net sales	1,708.7	1,671.3	3,374.4	3,256.8
Distributors and resellers
Revenue recognition
Net sales	306.6	310.1	599.4	591.5
Interconnect Products and Assemblies
Revenue recognition
Net sales	1,925.6	1,870.2	3,788.3	3,640.2
Interconnect Products and Assemblies | United States
Revenue recognition
Net sales	588.7	522.4	1,122.7	1,001.6
Interconnect Products and Assemblies | China
Revenue recognition
Net sales	540.6	535.9	1,063.0	1,063.2
Interconnect Products and Assemblies | Other foreign locations
Revenue recognition
Net sales	796.3	811.9	1,602.6	1,575.4
Interconnect Products and Assemblies | End customers and contract manufacturers
Revenue recognition
Net sales	1,641.4	1,587.5	3,234.2	3,103.0
Interconnect Products and Assemblies | Distributors and resellers
Revenue recognition
Net sales	284.2	282.7	554.1	537.2
Cable Products and Solutions
Revenue recognition
Net sales	89.7	111.2	185.5	208.1
Cable Products and Solutions | United States
Revenue recognition
Net sales	44.1	53.9	89.0	101.7
Cable Products and Solutions | China
Revenue recognition
Net sales	1.9	1.1	2.7	1.9
Cable Products and Solutions | Other foreign locations
Revenue recognition
Net sales	43.7	56.2	93.8	104.5
Cable Products and Solutions | End customers and contract manufacturers
Revenue recognition
Net sales	67.3	83.8	140.2	153.8
Cable Products and Solutions | Distributors and resellers
Revenue recognition
Net sales	$ 22.4	$ 27.4	$ 45.3	$ 54.3