Commitments And Contingencies (Schedule Of Product Warranty Liability) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013
Commitments and Contingencies Disclosure [Abstract]
Balance at beginning of period	$ 37	$ 37	$ 37	$ 38
Warranty expense recognized	2	1	3	3
Warranty credits issued	(2)	(1)	(3)	(4)
Balance at end of period	$ 37	$ 37	$ 37	$ 37