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Income Taxes - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2019 | Dec. 29, 2017 | Dec. 31, 2018
Income Tax Disclosure [Abstract] |  |  |  |
Effective Corporation tax benefit rate percentage |  | 31.16% |  |
U.S. corporate tax rate | 21.00% | 21.00% | 35.00% |
Estimated effects of change in tax status based upon forecasted temporary differences |  | $ 56.0 |  |
Deferred tax assets valuation allowance | $ 13.5 | 13.5 |  |
Liability for income taxes associated with uncertain tax positions | $ 11.3 | $ 11.3 |  | $ 9.9

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- Definition Amount recognized for uncertainty in income taxes classified as current. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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