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Taxes on Earnings - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Sep. 29, 2017
Sep. 30, 2016
Oct. 02, 2015
Sep. 26, 2014
Income Tax [Line Items]        
Cumulative undistributed earnings of non-U.S subsidiaries $ 2,176.9      
Increase (decrease) in valuation allowance 26.2 $ 9.9 $ 2.2  
Unrecognized tax benefits 42.7 40.7 $ 39.5 $ 49.6
Amount that would affect the effective tax rate 36.6      
Accrued interest and penalties related to unrecognized tax benefits 8.9 8.0    
Net expense (benefit) related to interest and penalties was included in taxes on earnings 0.9 $ (0.8)    
Foreign Tax Authority        
Income Tax [Line Items]        
Additional deferred taxes liabilities if earnings were not considered to be reinvested indefinitely 573.8      
Net operating loss carry forwards 382.8      
Amount unavailable to the company under local loss utilization 21.1      
Internal Revenue Service (IRS) | Minimum        
Income Tax [Line Items]        
Net operating loss carry forwards 9.6      
Federal        
Income Tax [Line Items]        
Net operating loss carryforwards subject to an annual limitation 1.1      
State and Local Jurisdiction        
Income Tax [Line Items]        
Net operating loss carry forwards $ 7.2