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 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
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
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)
Treasury shares purchased, value	(14.4)		(3.9)	(10.5)		(14.4)
Dividend declared	(23.2)			(23.2)		(23.2)
Comprehensive income:
Net income (loss)	145.0			143.2		143.2	1.8
Unrealized gain on derivatives	(21.1)				(21.1)	(21.1)
Net unrealized (loss) gain of available-for-sale- investments	2.7				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
Exercises of stock options, shares	0	1,975,339
Exercises of stock options, value	44.0		44.0			44.0
Issuance of restricted stock awards	26,201	26,201
Share-based payment expense	9.9		9.9			9.9
Excess tax benefit from stock-based compensation	(1.4)		(1.4)			(1.4)
Capital contribution from non-controlling interest	3.6						3.6
Treasury shares purchased, shares	(3,490,488)	(3,490,488)
Treasury shares purchased, value	(94.0)		(26.1)	(67.9)		(94.0)
Dividend declared	(28.2)			(28.2)		(28.2)
Comprehensive income:
Net income (loss)	(33.9)			(34.4)		(34.4)	0.5
Unrealized gain on derivatives	10.3				10.3	10.3
Net unrealized (loss) gain of available-for-sale- investments	(2.7)				(2.7)	(2.7)
Net foreign currency translation adjustment	(0.3)				1.4	1.4	(1.7)
Change in retirement benefit adjustment	12.5				12.5	12.5	0
Comprehensive income	(14.1)					(12.9)	(1.2)
Balance, value at Dec. 27, 2013	1,751.2	0.6	530.1	1,185.8	(3.4)	1,713.1	38.1
Balance, shares at Dec. 27, 2013	57,707,385	56,218,437
Exercises of stock options, shares	287,202	1,945,939
Exercises of stock options, value	48.9		48.9			48.9
Issuance of restricted stock awards	26,117	26,117
Share-based payment expense	12.4		12.4			12.4
Income Tax Deficiency from Stock-based Compensation	(0.5)		(0.5)			(0.5)
Capital contribution from non-controlling interest	(0.1)						(0.1)
Treasury shares purchased, shares	(4,577,772)	(4,577,772)
Treasury shares purchased, value	(146.5)	(0.1)	(44.5)	(101.9)		(146.5)	0
Dividend declared	(27.9)			(27.9)		(27.9)	0
Comprehensive income:
Net income (loss)	144.6			142.4		142.4	2.2
Unrealized gain on derivatives	28.3				28.3	28.3
Net unrealized (loss) gain of available-for-sale- investments	0				0	0
Net foreign currency translation adjustment	(12.8)				(12.8)	(12.8)	0
Change in retirement benefit adjustment	(9.7)				(9.5)	(9.5)	(0.2)
Comprehensive income	150.4					148.4	2.0
Balance, value at Dec. 26, 2014	$ 1,787.9	$ 0.5	$ 546.4	$ 1,198.4	$ 2.6	$ 1,747.9	$ 40.0
Balance, shares at Dec. 26, 2014	53,899,923	53,899,923