Asset Impairment (Narrative) (Details) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jul. 30, 2011	Jul. 31, 2010	Jul. 30, 2011	Jul. 31, 2010	Jan. 29, 2011
Assets, carrying value	$ 2,198.3	$ 2,295.8	$ 2,198.3	$ 2,295.8	$ 2,268.5
Asset impairment charges	34.1	1.6	35.4	1.6
Assets Under Impairment Review [Member]
Assets, carrying value	44.7		44.7
Assets, fair value	$ 10.6		$ 10.6