CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($) $ in Millions	Sep. 25, 2015	Dec. 26, 2014
Statement of Financial Position [Abstract]
Allowance for Trade accounts receivable	$ 8.3	$ 10.7
Allowance for Other accounts receivable	$ 7.3	$ 4.5
Ordinary shares, par value (usd per share)	$ 0.01	$ 0.01
Ordinary shares, authorized (shares)	200,000,000	200,000,000
Ordinary shares, issued (shares)	52,590,851	53,899,923
Ordinary shares, outstanding (shares)	52,590,851	53,899,923
Preferred shares, par value (usd per share)	$ 0.01	$ 0.01
Preferred shares, authorized (shares)	50,000,000	50,000,000
Preferred shares, issued (shares)	0	0
Preferred shares, outstanding (shares)	0	0