Condensed Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 28, 2012	Jul. 30, 2011	Jul. 28, 2012	Jul. 30, 2011
Cash flows from operating activities
Net income	$ 70.7	$ 66.3	$ 153.2	$ 141.7
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization of property and equipment	23.6	22.5	46.7	45.0
Pension	(2.8)	(2.9)	(5.4)	(5.6)
Share-based compensation	3.0	4.3	7.1	7.0
Deferred taxation	(9.3)	(1.9)	(12.8)	(2.4)
Facility amendment fees amortization and charges	0.1	1.4	0.2	1.6
Other non-cash movements	(1.4)	(0.4)	(1.4)	(0.5)
Changes in operating assets and liabilities:
(Increase)/decrease in accounts receivable	(7.4)	(2.7)	56.1	29.3
Decrease/(increase) in other receivables and other assets	3.2	(5.8)	3.1	6.1
Decrease in other current assets	2.9	0.3	7.2	8.4
Decrease/(increase) in inventories	8.4	17.8	(17.2)	(6.5)
(Decrease)/increase in accounts payable	(18.8)	(7.1)	(46.5)	10.8
Increase/(decrease) in accrued expenses and other liabilities	9.0	1.5	(53.0)	(45.8)
Decrease in deferred revenue	(3.6)	(7.5)	(0.9)	(4.0)
Increase/(decrease) in income taxes payable	4.7	1.4	(20.9)	6.1
Effect of exchange rate changes on currency swaps	0.5	(0.4)	1.3	0.9
Net cash provided by operating activities	82.8	86.8	116.8	192.1
Investing activities
Purchase of property and equipment	(36.2)	(25.4)	(54.8)	(38.3)
Net cash used in investing activities	(36.2)	(25.4)	(54.8)	(38.3)
Financing activities
Dividends	(10.3)		(19.0)
Proceeds from exercise of share options	0.3	0.4	5.4	4.4
Repurchase of common shares	(196.5)		(287.2)
Net settlement of equity based awards	(2.5)		(10.8)
Credit facility fees paid		(1.4)		(1.6)
Repayment of short-term borrowings		(14.3)		(18.3)
Net cash used in financing activities	(209.0)	(15.3)	(311.6)	(15.5)
Effect of exchange rate changes on cash and cash equivalents	0.9		0.3	(0.2)
Cash and cash equivalents at beginning of period	399.0	394.1	486.8	302.1
(Decrease)/increase in cash and cash equivalents	(162.4)	46.1	(249.6)	138.3
Cash and cash equivalents at end of period	$ 237.5	$ 440.2	$ 237.5	$ 440.2