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Income Taxes (Narrative) (Details) (USD $)
12 Months Ended
Sep. 30, 2012
Oct. 02, 2011
Oct. 03, 2010
Sep. 27, 2009
Income Tax Expense (Benefit) [Abstract]        
Cumulative undistributed earnings of foreign subsidiaries and equity investees $ 1,500,000,000      
Net change in total valuation allowance 16,800,000 49,300,000    
Previously unrecognized deferred tax assets and valuation allowance   32,000,000    
Capital loss carryforwards 7,100,000      
Capital loss carryforwards expiration date 2015      
Foreign net operating losses 318,000,000      
Taxes currently payable 50,800,000 30,100,000    
Gross unrecognized tax benefits 75,300,000 52,900,000 68,400,000 49,100,000
Unrecognized tax benefits affecting the effective tax rate if recognized 39,700,000      
Accrued interest and penalties $ 5,500,000 $ 6,200,000