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Income Taxes - Deferred Tax Balance Classified in Consolidated Balance Sheet (Details) - USD ($)
$ in Millions
Dec. 31, 2017
Jan. 01, 2017
Income Tax Disclosure [Abstract]    
Deferred tax asset $ 183.4 $ 180.1
Other long-term liabilities (60.6) (34.1)
Deferred tax assets, net $ 122.8 $ 146.0