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Income Taxes - Earnings (Loss) From Continuing Operations Before Taxes Per Jurisdiction (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Jan. 01, 2017
Jan. 03, 2016
Income Tax Disclosure [Abstract]      
Domestic $ 55.2 $ 112.4 $ 28.9
Foreign 26.5 37.3 34.3
Earnings before taxes and equity in net earnings (loss) of affiliate $ 81.7 $ 149.7 $ 63.2 [1]
[1] Fiscal year included 53 weeks.