Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 30, 2011	Jul. 30, 2010	Jul. 30, 2011	Jul. 31, 2010
Income Taxes [Line Items]
Effective tax rate, income tax provision (benefit)	2.20%	1.10%	1.60%	0.30%
Current year tax liability	$ 4.9	$ 3.0	$ 8.2	$ 6.2
Reduction of unrecognized tax benefits due to the expiration of the statute of limitations	2.6	2.3	6.9	8.8
Increase in unrecognized tax benefits	1.8	2.3	3.8	4.4
Withholding tax on the disposition of an investment		1.0		1.0
Foreign Country
Income Taxes [Line Items]
Settlement of a non-U.S. audit	0.2		0.2
Decrease in provision for income taxes due to a deferred tax asset for employee stock options on a non-U.S. subsidiary		$ 1.5		$ 1.5