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Income Taxes - Net Tax Effect of State and Foreign Loss Carryforwards (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Operating Loss Carryforwards [Line Items]
No expiration	$ 29.5
Total	30.8	$ 38.8
Income tax (benefit) expense	(27.1)	$ 12.8	$ 30.0
2019-2020
Operating Loss Carryforwards [Line Items]
Subject to expiration	0.7
2021-2035
Operating Loss Carryforwards [Line Items]
Subject to expiration	$ 0.6

X

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

+ References

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards that are not subject to expiration dates.

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- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

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