Commitments And Contingencies (Schedule Of Product Warranty Liability) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011
Commitments and Contingencies Disclosure [Abstract]
Balance at beginning of period	$ 37	$ 27	$ 36	$ 25
Warranty expense recognized	1	3	3	6
Warranty credits issued	0	(1)	(1)	(2)
Balance at end of period	$ 38	$ 29	$ 38	$ 29