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Common Stock And Share-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule Of Compensation Expense For Share-Based Incentive Awards
 (in millions)
2012
 
2011
 
2010
Restricted stock units
$
31      
      
$
22      
      
$
9      
Other share-based compensation
      
-      
      
      
1      
      
      
14      
Performance shares:
      
      
      
      
      
      
      
      
Equity awards
      
26      
      
      
16      
      
      
11      
Liability awards
      
-      
      
      
(13)      
      
      
22      
Total compensation expense (pre-tax)
$
57      
      
$
26      
      
$
56      
Total compensation expense (after-tax)
$
34      
      
$
16      
      
$
33      
Schedule Of Restricted Stock Units Activity
 
Number of
 
Weighted Average Grant-
 
Restricted Stock Units
 
Date Fair Value
Nonvested at January 1
1,626,048      
      
$
42.57      
Granted
923,001      
      
$
42.17      
Vested
(424,034)      
      
$
41.88      
Forfeited
(55,724)      
      
$
42.64      
Nonvested at December 31
2,069,291      
      
$
42.52      
Schedule Of Nonvested Performance-Based Units Activity
 
Number of
 
Weighted Average Grant-
 
Performance Shares
 
Date Fair Value
Nonvested at January 1
1,325,406      
      
$
34.64      
Granted
834,420      
      
$
41.93      
Vested
(425)      
      
$
34.86      
Forfeited (1)
(661,928)      
      
$
35.71      
Nonvested at December 31
1,497,473      
      
$
38.15      
 
 
 
 
 
(1) Includes performance shares that expired with zero value as performance targets were not met.