Property and Equipment (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Jan. 01, 2012	Jan. 02, 2011
Property and Equipment (Textual) [Abstract]
Assets under capital leases	$ 18.0	$ 18.2
Property and Equipment (Additional Textual) [Abstract]
Interest in property and equipment	1.2	3.1
Depreciation expense	72.2	61.6	37.7
Accumulated amortization related to capital leases	6.3	5.5
Depreciation expense related to capital leases	1.0	0.8	0.8
Building Improvements [Member]
Property and Equipment (Textual) [Abstract]
Assets under capital leases	18.0
Equipment [Member]
Property and Equipment (Textual) [Abstract]
Assets under capital leases	$ 1.0