Store Lease Exit Costs and Impairment Charges (Store Lease Exit Cost Activity) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 29, 2012		Dec. 31, 2011		Jan. 01, 2011
Store Lease Exit Costs [Roll Forward]
Beginning balance	$ 77.0		$ 94.0		$ 87.6
Provision for estimated net future cash flows of additional closed stores	19.4	[1]	2.8	[1]	5.1	[1]
Net cash flows, interest accretion, changes in estimates of net future cash flows	(19.9)		(19.8)		1.3
Ending balance	$ 76.5		$ 77.0		$ 94.0

[1] Estimated net future cash flows represents future minimum lease payments and related ancillary costs from the date of closure to the end of the remaining lease term, net of estimated cost recoveries that may be achieved through subletting properties or through favorable lease terminations.