Taxes on Earnings - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Oct. 02, 2015	Sep. 26, 2014	Sep. 27, 2013	Sep. 28, 2012
Income Tax [Line Items]
Total deferred tax liabilities	$ 101.5	$ 97.3
Cumulative undistributed earnings of non-U.S subsidiaries	1,635.0
Increase (decrease) in valuation allowance	2.2	6.8	$ 14.9
Unrecognized tax benefits	39.5	49.6	$ 37.0	$ 38.8
Amount that would affect the effective tax rate	31.2
Accrued interest and penalties related to unrecognized tax benefits	7.1	7.8
Net expense (benefit) related to interest and penalties was included in taxes on earnings	0.5	$ 1.1
Foreign Tax Authority
Income Tax [Line Items]
Additional deferred taxes liabilities if earnings were not considered to be reinvested indefinitely	421.3
Net operating loss carry forwards	268.4
Amount unavailable to the company under local loss utilization	20.1
Internal Revenue Service (IRS) | Minimum
Income Tax [Line Items]
Net operating loss carry forwards	12.1
Federal
Income Tax [Line Items]
Net operating loss carryforwards subject to an annual limitation	1.3
State and Local Jurisdiction
Income Tax [Line Items]
Net operating loss carry forwards	$ 10.9