Taxes on Earnings - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 26, 2014	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
Income Tax [Line Items]
Cumulative undistributed earnings of non-U.S subsidiaries	$ 1,537.6
Increase (decrease) in valuation allowance	6.8	14.9	(1.1)
Minimum likelihood percentage of uncertain tax position being realized upon settlement	50.00%
Unrecognized tax benefits	49.6	37.0	38.8	37.1
Amount that would affect the effective tax rate	32.2
Accrued interest and penalties related to unrecognized tax benefits	7.8	6.7
Net expense (benefit) related to interest and penalties was included in taxes on earnings	1.1	(1.2)
Foreign Tax Authority
Income Tax [Line Items]
Additional deferred taxes liabilities if earnings were not considered to be reinvested indefinitely	381.0
Net operating loss carry forwards	226.0
Amount unavailable to the company under local loss utilization	22.6
Federal
Income Tax [Line Items]
Net operating loss carry forwards	13.4
Net operating loss carryforwards subject to an annual limitation	1.3
Federal | Minimum
Income Tax [Line Items]
Net operating loss carryforwards expiring period	2018
Federal | Maximum
Income Tax [Line Items]
Net operating loss carryforwards expiring period	2031
State and Local Jurisdiction
Income Tax [Line Items]
Net operating loss carry forwards	$ 13.4
State and Local Jurisdiction | Minimum
Income Tax [Line Items]
Net operating loss carryforwards expiring period	2018
State and Local Jurisdiction | Maximum
Income Tax [Line Items]
Net operating loss carryforwards expiring period	2032