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Income Taxes (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Dec. 30, 2017
Income Tax Disclosure [Abstract]
Unrecognized tax benefits	$ 2.2
Income tax penalties and interest accrued	1.2
Significant change in unrecognized tax benefits is reasonably possible, estimated change, upper bound	1.9
Transition tax for accumulated foreign earnings, provisional income tax expense (benefit)	1.6	$ 12.1
Change in enacted tax rate, amount	$ 62.9

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- Definition

Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Transition Tax For Accumulated Foreign Earnings, Provisional Income Tax Expense (Benefit)

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Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates.

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Amount of unrecognized tax benefits.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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