Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		8 Months Ended
	Sep. 10, 2016	Sep. 12, 2015	Sep. 10, 2016	Sep. 12, 2015	Jan. 02, 2016	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Net operating loss	$ 51.9		$ 51.9			$ 44.7
Gross deferred tax asset	20.0		20.0
Excess tax benefits from share-based compensation	$ 2.5		$ 2.5
Effective tax rate	28.10%	37.30%	31.20%	38.60%
Reserve balance	$ 2.5		$ 2.5		$ 2.5