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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 01, 2017 | Oct. 02, 2016 | Oct. 01, 2017 | Oct. 02, 2016
Income Tax Disclosure [Abstract] |  |  |  |
Income tax (benefit) expense | $ (4.1) | $ 24.7 | $ 0.1 | $ 28.2
Effective tax rate | (22.90%) | 23.40% | 0.20% | 21.80%
Tax benefit from release of valuation allowance | $ 5.1 |  |  |
Tax expense on gain on investment in TS Kelly Asia Pacific equity affiliate |  | $ 23.5 |  |

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