CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($) $ in Millions	Jun. 26, 2015	Dec. 26, 2014
Statement of Financial Position [Abstract]
Allowance for Trade accounts receivable	$ 10.0	$ 10.7
Allowance for Other accounts receivable	$ 4.4	$ 4.5
Ordinary shares, par value	$ 0.01	$ 0.01
Ordinary shares, authorized	200,000,000	200,000,000
Ordinary shares, issued	52,692,566	53,899,923
Ordinary shares, outstanding	52,692,566	53,899,923
Preferred shares, par value	$ 0.01	$ 0.01
Preferred shares, authorized	50,000,000	50,000,000
Preferred shares, issued	0	0
Preferred shares, outstanding	0	0