Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Dec. 27, 2013	Sep. 27, 2013
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 5.2	$ 4.6
Preferred shares, par value (in usd per share)	$ 0.20	$ 0.20
Preferred shares, shares authorized (in shares)	500,000,000	500,000,000
Preferred shares, issued (in shares)	0	0
Preferred shares, shares outstanding (in shares)	0	0
Ordinary shares, par value (in usd per share)	$ 0.20	$ 0.20
Ordinary shares, shares authorized (in shares)	500,000,000	500,000,000
Ordinary shares, shares issued (in shares)	58,079,356	57,713,873
Ordinary stock, shares outstanding (in shares)	58,061,463	57,713,390
Ordinary shares held in treasury (in shares)	17,893	483