Commitments And Contingencies (Schedule Of Product Warranty Liability) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Commitments and Contingencies Disclosure [Abstract]
Balance at beginning of period	$ 37	$ 37	$ 37	$ 38
Warranty expense (income) recognized	1	(2)	4	1
Warranty credits issued	(1)	0	(4)	(4)
Balance at end of period	$ 37	$ 35	$ 37	$ 35