CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $) In Millions, except Share data, unless otherwise specified	Total	Ordinary Shares	Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Total Shareholders' Equity	Non-Controlling Interests [Member]
Balance, value at Jan. 01, 2010	$ 1,695.2	$ 0.6	$ 561.2	$ 1,108.5	$ 2.8	$ 1,673.1	$ 22.1
Balance, shares at Jan. 01, 2010		63,615,411
Exercises of stock options, shares		135,722
Exercises of stock options, value	2.3		2.3			2.3
Issuance of restricted stock awards		32,956
Share-based payment expense	7.5		7.5			7.5
Excess tax benefit from stock-based compensation	0
Capital contribution from non-controlling interest	2.7						2.7
Treasury shares purchased, shares		(5,058,659)
Treasury shares purchased, value	(108.1)		(108.1)			(108.1)
Dividend declared	(2.9)			(2.9)		(2.9)
Comprehensive income:
Net income	60.8			62.2		62.2	(1.4)
Unrealized gain on derivatives	(39.1)				(39.1)	(39.1)
Net unrealized loss of available-for-sale- investments	0
Net foreign currency translation adjustment	10.9				10.0	10.0	0.9
Change in retirement benefit adjustment	2.2				2.2	2.2
Comprehensive income	34.8					35.3	(0.5)
Balance, value at Dec. 31, 2010	1,631.5	0.6	462.9	1,167.8	(24.1)	1,607.2	24.3
Balance, shares at Dec. 31, 2010		58,725,430
Exercises of stock options, shares		1,166,849
Exercises of stock options, value	22.8		22.8			22.8
Issuance of restricted stock awards	27,853	27,853
Share-based payment expense	9.2		9.2			9.2
Excess tax benefit from stock-based compensation	2.9		2.9			2.9
Capital contribution from non-controlling interest	(0.9)						(0.9)
Treasury shares purchased, shares	(2,155,678)	(2,155,678)
Treasury shares purchased, value	(50.0)		(14.2)	(35.8)		(50.0)
Dividend declared	(17.7)			(17.7)		(17.7)
Comprehensive income:
Net income	94.8			92.5		92.5	2.3
Unrealized gain on derivatives	26.3				26.3	26.3
Net unrealized loss of available-for-sale- investments	0
Net foreign currency translation adjustment	(2.5)				(2.5)	(2.5)	0
Change in retirement benefit adjustment	(1.3)				(1.3)	(1.3)
Comprehensive income	117.3					115.0	2.3
Balance, value at Dec. 30, 2011	1,715.1	0.6	483.6	1,206.8	(1.6)	1,689.4	25.7
Balance, shares at Dec. 30, 2011	57,764,454	57,764,454
Exercises of stock options, shares		475,918
Exercises of stock options, value	10.1		10.1			10.1
Issuance of restricted stock awards	27,573	27,573
Share-based payment expense	10.3		10.3			10.3
Excess tax benefit from stock-based compensation	3.6		3.6			3.6
Capital contribution from non-controlling interest	6.7						6.7
Treasury shares purchased, shares	(560,560)	560,560
Treasury shares purchased, value	(14.4)		(3.9)	(10.5)		(14.4)	0
Dividend declared	(23.2)			23.2		(23.2)	0
Comprehensive income:
Net income	145.0			143.2		143.2	1.8
Unrealized gain on derivatives	(21.1)				(21.1)	(21.1)
Available-for-sale Securities, Gross Unrealized Gains					2.7
Net unrealized loss of available-for-sale- investments	2.7					2.7
Net foreign currency translation adjustment	9.1				7.5	7.5	1.6
Change in retirement benefit adjustment	(12.5)				(12.4)	(12.4)	0.1
Comprehensive income	123.2					119.9	3.3
Balance, value at Dec. 28, 2012	$ 1,831.4	$ 0.6	$ 503.7	$ 1,316.3	$ (24.9)	$ 1,795.7	$ 35.7
Balance, shares at Dec. 28, 2012	57,707,385	57,707,385