Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 28, 2012 Month	Jul. 30, 2011	Jul. 28, 2012	Jul. 30, 2011
Income Taxes [Line Items]
Effective income tax rate	17.30%	53.90%	17.10%	87.50%
Net favorable discrete events			$ 2.2	$ 1.4
Weighted average foreign effective tax rate			11.10%	17.70%
Interest and penalties related to unrecognized tax benefit (expense)	34.2	38.3	34.2	38.3
Portion of unrecognized tax benefits that would impact the effective tax rate if recognized	21.0	24.7	21.0	24.7
Potential decrease in unrecognized tax benefits	2.3		2.3
Period applicable to Decrease unrecognized tax benefits	12
Favorable impact in the period of recognition, maximum	$ 1.5		$ 1.5