Commitments And Contingencies (Schedule Of Product Warranty Liability) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Commitments and Contingencies Disclosure [Abstract]
Balance at beginning of period	$ 37	$ 38	$ 38	$ 36
Warranty expense recognized	(2)	2	1	5
Warranty credits issued	0	(1)	(4)	(2)
Balance at end of period	$ 35	$ 39	$ 35	$ 39