Commitments And Contingencies - Schedule Of Product Warranty Liability (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 03, 2015	Sep. 27, 2014	Oct. 03, 2015	Sep. 27, 2014
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance at beginning of period	$ 29	$ 37	$ 35	$ 37
Warranty expense (income) recognized	0	1	(4)	4
Warranty credits issued	(1)	(1)	(3)	(4)
Balance at end of period	$ 28	$ 37	$ 28	$ 37