Shareholders' Equity (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	3 Months Ended	9 Months Ended
	Jul. 31, 2009	Jul. 02, 2010	Sep. 28, 2012	Sep. 30, 2011	Dec. 30, 2011
Class of Stock [Line Items]
Preferred Stock, Shares Issued			0		0
Preferred Stock, Shares Outstanding			0		0
Preferred shares, shares authorized			50,000,000		50,000,000
Preferred shares, par value			$ 0.01		$ 0.01
Ordinary shares, issued			58,104,252		57,764,454
Ordinary shares, outstanding			58,104,252		57,764,454
Ordinary shares, authorized			200,000,000		200,000,000
Ordinary shares, par value			$ 0.01		$ 0.01
Stock Repurchase Program:
Stock repurchase program, ordinary shares authorized	$ 150	$ 150
Stock repurchase program, value of ordinary shares repurchased and retired			158
Stock repurchase program, ordinary shares repurchased and retired			7,214,337
Stock repurchase program, maximum remaining amount			142.0
Dividends:
Payments of dividends, common stock			$ 17.4	$ 11.9