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Detail of Certain Balance Sheet Accounts - Current Receivables (Detail) - USD ($)
$ in Millions
Sep. 30, 2017
Oct. 01, 2016
Current receivables    
Accounts receivable $ 8,013 $ 8,458
Other 807 760
Allowance for doubtful accounts (187) (153)
Current receivables, Net $ 8,633 $ 9,065