Sale Leaseback Transaction (Details) $ in Millions	Aug. 25, 2014 USD ($) property extension	Jan. 01, 2017 USD ($)	Jan. 03, 2016 USD ($)	Dec. 28, 2014 USD ($)
Leases [Abstract]
Number of properties sold | property	49
Number of properties leased | property	49
Initial lease term	20 years
Number of extension options | extension	4
Duration of extension option	5 years
Sale leaseback obligations, current portion			$ 2.4
Net proceeds	$ 143.2
Proceeds from sale leaseback transaction	$ 183.7
Net book value		$ 81.3	$ 82.0	$ 84.3