Components Of Net Periodic Pension Cost (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 28, 2012	Jul. 30, 2011	Jul. 28, 2012	Jul. 30, 2011
Pensions [Abstract]
Service cost	$ 0.9	$ 1.1	$ 1.8	$ 2.5
Interest cost	2.3	2.7	4.7	5.4
Expected return on UK Plan assets	(2.8)	(3.5)	(5.7)	(7.0)
Amortization of unrecognized prior service credit	(0.4)	(0.3)	(0.8)	(0.5)
Amortization of unrecognized actuarial loss	0.8	0.7	1.6	1.3
Net periodic benefit cost	$ 0.8	$ 0.7	$ 1.6	$ 1.7