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Income Taxes - Reconciliation of Income Tax Provision (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 30, 2018 | Sep. 30, 2018 | Jul. 01, 2018 | Apr. 01, 2018 | Dec. 31, 2017 | Oct. 01, 2017 | Jun. 25, 2017 | Mar. 26, 2017 | Dec. 30, 2018 | Dec. 31, 2017 | Dec. 25, 2016
Income Tax Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Income tax (benefit) at federal statutory rate |  |  |  |  |  |  |  |  | $ 1.8 | $ (20.0) | $ (18.1)
State taxes, net of federal tax benefit and valuation allowance |  |  |  |  |  |  |  |  | 0.9 | 0.5 | 0.1
Difference in tax rates between U.S. and foreign |  |  |  |  |  |  |  |  | 0.7 | 0.0 | 0.1
Increase (decrease) in valuation allowance |  |  |  |  |  |  |  |  | 4.7 | (45.6) | 18.9
Nondeductible expense |  |  |  |  |  |  |  |  | 0.6 | 1.1 | 0.7
Increase in reserve for uncertain tax positions |  |  |  |  |  |  |  |  | 4.0 | 1.3 | 0.1
Changes to indefinite life items and separate state deferred taxes |  |  |  |  |  |  |  |  | (0.7) | (1.8) | 4.0
One-time transition tax on previously undistributed foreign earnings |  |  |  |  |  |  |  |  | 2.2 | 6.2 | 0.0
Goodwill impairment |  |  |  |  |  |  |  |  | 0.0 | 8.1 | 0.0
Decrease in deferred taxes related to disposition |  |  |  |  |  |  |  |  | (9.6) | 0.0 | 0.0
Impact related to the 2017 Tax Act |  |  |  |  |  |  |  |  | 0.0 | 40.0 | 0.0
Total | $ 0.2 | $ 3.4 | $ 0.1 | $ 0.9 | $ (11.8) | $ (1.1) | $ 1.3 | $ 1.4 | $ 4.6 | $ (10.2) | $ 5.8

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