Financial Instruments - Long-term Debt Maturity (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 02, 2016	Sep. 27, 2015	Oct. 02, 2016	Sep. 27, 2015	Dec. 31, 2015
Financial Instruments [Abstract]
2017	$ 0		$ 0
2018	750		750
2019	0		0
2020	500		500
After 2020	3,251		3,251
Total long-term debt	4,501		4,501		$ 4,900
Interest expense, net of capitalized interest	41	$ 29	125	$ 86
Capitalized interest	$ 1	$ 1	$ 2	$ 3