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Changes in Accrued Warranties and Related Costs (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jun. 27, 2015
Jun. 28, 2014
Jun. 27, 2015
Jun. 28, 2014
Movement in Standard Product Warranty Accrual [Roll Forward]        
Beginning accrued warranty and related costs $ 5,143 $ 4,368 $ 4,159 $ 2,967
Cost of warranty claims (1,077) (882) (3,151) (2,811)
Accruals for product warranty 1,071 756 4,129 4,086
Ending accrued warranty and related costs $ 5,137 $ 4,242 $ 5,137 $ 4,242