CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Dec. 26, 2014	Dec. 27, 2013
Allowance for trade accounts receivable	$ 10.7	$ 8.3
Allowance for other accounts receivable	$ 4.5	$ 6.1
Stockholders' Equity, Number of Shares, Par Value and Other Disclosures [Abstract]
Ordinary shares, par value	$ 0.01
Ordinary shares, authorized	200,000,000	200,000,000
Ordinary shares, issued	56,218,437	57,707,385
Ordinary shares, outstanding	53,899,923	57,707,385
Preferred shares, par value	$ 0.01	$ 0.01
Preferred shares, shares authorized	50,000,000	50,000,000
Preferred shares, issued	0	0
Preferred shares, outstanding	0	0