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Accounts Receivable and Finance Receivables - Accounts receivable (Details) - USD ($)
$ in Millions
Jul. 02, 2016
Jan. 02, 2016
Accounts Receivable    
Unbillable receivables within accounts receivable $ 188 $ 135
Manufacturing group    
Accounts Receivable    
Accounts Receivable, Gross 1,176 1,080
Allowance for doubtful accounts (32) (33)
Total 1,144 1,047
Commercial | Manufacturing group    
Accounts Receivable    
Accounts Receivable, Gross 902 841
U. S. Government Contracts | Manufacturing group    
Accounts Receivable    
Accounts Receivable, Gross $ 274 $ 239