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Income Taxes - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Sep. 29, 2012
Oct. 01, 2011
Oct. 02, 2010
Oct. 03, 2009
Oct. 04, 2008
Income Taxes [Line Items]          
Undistributed earnings of foreign subsidiaries for which deferred taxes have not been provided $ 566        
Potential incremental federal tax applicable to earnings assuming repatriation of permanently reinvested earnings 150        
Deduction for qualifying domestic production activities, percent of qualifying net income 9.00% 9.00% 6.00% 6.00% 6.00%
Domestic production activity deduction (2.50%) (2.30%) (1.70%)    
Tax provision benefits resulting from deduction for qualifying domestic production activities 229 183 111    
Gross unrecognized tax benefits that would reduce income tax expense and effective tax rate, if recognized 452 480 473    
Accrued interest and penalties related to unrecognized tax benefits 209 175 163    
Additional accrued interest related to unrecognized tax benefits 25 17 28    
Reductions in accrued interest as a result of audit settlements and other prior-year adjustments 12 13 7    
Unrecognized tax benefits, reasonably possible reduction due to payments for or resolution of open tax matters 81        
Income tax benefits attributable to equity-based compensation transactions (less than) exceeded amounts recorded based on grant date fair value (charged) credited to shareholders' equity 120 109 61    
UTV Software Communications Limited
         
Income Taxes [Line Items]          
Valuation allowance 193        
International Theme Parks
         
Income Taxes [Line Items]          
Valuation allowance $ 584        
Fiscal Year 2013 and Thereafter
         
Income Taxes [Line Items]          
Domestic production activity deduction 9.00%