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Discontinued Operations - Additional Information (Details) - USD ($) shares in Millions, $ in Millions |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Aug. 01, 2015 | Jan. 02, 2016 | Jan. 02, 2016 | Dec. 31, 2016
Discontinued Operations |  |  |  |
Stock conversion ratio in distribution | 0.2 |  |  |
Net income tax provision (benefit) for discontinued operations |  | $ (4.5) |  |
Spinoff | Lumentum |  |  |  |
Discontinued Operations |  |  |  |
Net income tax provision (benefit) for discontinued operations |  |  | $ 30.5 |
Transaction, advisory and other costs to effect the separation |  | $ 1.5 | 15.5 |
Spinoff | Lumentum | Discontinued Operations |  |  |  |
Discontinued Operations |  |  |  |
Net income tax provision |  |  | 25.2 |
Spinoff | Lumentum | Federal and State |  |  |  |
Discontinued Operations |  |  |  |
Net income tax provision (benefit) for discontinued operations |  |  | $ 5.6 |
Lumentum |  |  |  |
Discontinued Operations |  |  |  |
Percentage of outstanding shares distributed | 80.10% |  |  |
Stock conversion ratio in distribution | 0.2 |  |  |
Cash contributions agreed to in spin-off | $ 137.6 |  |  |
Retained ownership percentage | 19.90% |  |  |
Shares held in investment (in shares) | 11.7 |  |  | 1.7
Minimum holding period for retained interest | 6 months |  |  |
Maximum holding period for retained interest | 3 years |  |  |

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