Long-term Financing and Sales of Receivables (Sales Receivables) (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 02, 2016	Apr. 04, 2015	Dec. 31, 2015
Receivables [Abstract]
Accounts receivable sales proceeds	$ 2	$ 6
Long-term receivables sales proceeds	42	65
Total proceeds from receivable sales	44	$ 71
Servicing obligations for long-term receivables	$ 668		$ 668