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Reportable Business Segments (Details) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 USD ($) | Sep. 30, 2016 USD ($) | Sep. 30, 2017 USD ($) segment | Sep. 30, 2016 USD ($)
Segment reporting information |  |  |  |
Number of reportable business segments | segment |  |  | 2 |
Net sales | $ 1,840.8 | $ 1,635.9 | $ 5,067.4 | $ 4,635.3
Segment operating income | 377.9 | 326.3 | 1,028.2 | 866.1
Operating Segment |  |  |  |
Segment reporting information |  |  |  |
Segment operating income | 402.6 | 355.8 | 1,104.8 | 970.8
Operating Segment | Interconnect Products and Assemblies |  |  |  |
Segment reporting information |  |  |  |
Net sales | 1,731.5 | 1,543.2 | 4,754.3 | 4,366.9
Segment operating income | 388.3 | 342.0 | 1,060.8 | 932.2
Operating Segment | Cable Products and Solutions |  |  |  |
Segment reporting information |  |  |  |
Net sales | 109.3 | 92.7 | 313.1 | 268.4
Segment operating income | 14.3 | 13.8 | 44.0 | 38.6
Inter-Segment |  |  |  |
Segment reporting information |  |  |  |
Net sales | 13.6 | 10.2 | 38.4 | 26.6
Inter-Segment | Interconnect Products and Assemblies |  |  |  |
Segment reporting information |  |  |  |
Net sales | 2.7 | 1.5 | 6.9 | 5.0
Inter-Segment | Cable Products and Solutions |  |  |  |
Segment reporting information |  |  |  |
Net sales | $ 10.9 | $ 8.7 | $ 31.5 | $ 21.6

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