Long-term Financing and Sales of Receivables - Sales Receivables (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 01, 2017	Apr. 02, 2016	Dec. 31, 2016
Receivables [Abstract]
Accounts receivable sales proceeds	$ 19	$ 2
Long-term receivables sales proceeds	46	64
Total proceeds from receivable sales	65	$ 66
Servicing obligations for long-term receivables	$ 768		$ 774