Commitments And Contingencies (Tables)
 9 Months Ended
Sep. 29, 2012
Commitments and Contingencies Disclosure [Abstract]  
Changes In Company's Potential Liability For Product Warranty
 
 
Quarter Ended
 
Nine Months Ended
 
 
September 29,
2012
 
October 1,
2011
 
September 29,
2012
 
October 1,
2011
 
 
(In millions)
Beginning balance
 
$
18

 
$
19

 
$
20

 
$
19

New warranties issued
 
6

 
10

 
22

 
27

Settlements
 
(7
)
 
(9
)
 
(23
)
 
(27
)
Changes in liability for pre-existing warranties, including expirations
 
—

 
—

 
(2
)
 
1

Ending balance
 
$
17

 
$
20

 
$
17

 
$
20