Shareholders' Equity (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	3 Months Ended	6 Months Ended
	Jul. 31, 2009	Jul. 02, 2010	Jun. 29, 2012	Jul. 01, 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			58,001,277		57,764,454
Ordinary shares, outstanding			58,001,277		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
Total stock repurchase program, authorized repurchase amount			300.0
Stock repurchase program, maximum remaining amount			142.0
Dividends:
Payments of dividends, common stock			$ 11.6	$ 5.9