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Reportable Business Segments (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 USD ($) | Jun. 30, 2016 USD ($) | Jun. 30, 2017 USD ($) segment | Jun. 30, 2016 USD ($)
Segment reporting information |  |  |  |
Number of reportable business segments | segment |  |  | 2 |
Net sales | $ 1,666.5 | $ 1,548.2 | $ 3,226.6 | $ 2,999.4
Segment operating income | 336.2 | 300.3 | 650.3 | 539.8
Operating Segment |  |  |  |
Segment reporting information |  |  |  |
Segment operating income | 364.4 | 322.7 | 702.1 | 614.9
Operating Segment | Interconnect Products and Assemblies |  |  |  |
Segment reporting information |  |  |  |
Net sales | 1,559.3 | 1,456.0 | 3,022.8 | 2,823.8
Segment operating income | 348.4 | 309.0 | 672.4 | 590.1
Operating Segment | Cable Products and Solutions |  |  |  |
Segment reporting information |  |  |  |
Net sales | 107.2 | 92.2 | 203.8 | 175.6
Segment operating income | 16.0 | 13.7 | 29.7 | 24.8
Inter-Segment |  |  |  |
Segment reporting information |  |  |  |
Net sales | 12.3 | 8.4 | 24.8 | 16.4
Inter-Segment | Interconnect Products and Assemblies |  |  |  |
Segment reporting information |  |  |  |
Net sales | 1.9 | 1.9 | 4.2 | 3.5
Inter-Segment | Cable Products and Solutions |  |  |  |
Segment reporting information |  |  |  |
Net sales | $ 10.4 | $ 6.5 | $ 20.6 | $ 12.9

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