Financial Instruments (Schedule Of Financial Instruments Measured At Fair Value On A Recurring Basis Using Significant Unobservable Inputs (Level 3)) (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 29, 2012
Oct. 01, 2011
Sep. 29, 2012
Oct. 01, 2011
Financial Instrument [Line Items]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]    
 
Quarter Ended
 
September 29,
2012
 
October 1,
2011
 
(In millions)
Beginning balance
$
32

 
$
52

Redemption at par
—

 
(8
)
Gain (loss) included in net income (loss)
—

 
1

Ending balance
$
32

 
$
45

 
 
 
 
 
Nine Months Ended
 
September 29,
2012
 
October 1,
2011
 
(In millions)
Beginning balance
$
38

 
$
57

Redemption at par
(6
)
 
(14
)
Gain (loss) included in net income (loss)
—

 
2

Ending balance
$
32

 
$
45

  
Beginning balance $ 32 $ 52 $ 38 $ 57
Redemption at par 0 (8) (6) (14)
Ending balance $ 32 $ 45 $ 32 $ 45