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Accounts Receivable and Finance Receivables - Finance receivables categorized based on credit quality indicators (Details)
$ in Millions
3 Months Ended
Apr. 01, 2017
USD ($)
item
Dec. 31, 2016
USD ($)
Finance receivables categorized based on the internally assigned credit quality    
Number of loan categories based on key credit quality indicators for individual loan | item 3  
Performing    
Finance receivables categorized based on the internally assigned credit quality    
Total finance receivables $ 723 $ 758
Watchlist    
Finance receivables categorized based on the internally assigned credit quality    
Total finance receivables 103 101
Nonaccrual    
Finance receivables categorized based on the internally assigned credit quality    
Total finance receivables $ 84 $ 87
Nonaccrual as a percentage of finance receivables 9.23% 9.20%
Minimum | Nonaccrual    
Finance receivables categorized based on the internally assigned credit quality    
Number of months of contractual delinquency to classify accounts as nonaccrual unless such collection is not doubtful 3 months