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Reportable Segments (Tables)
 3 Months Ended
Mar. 31, 2012
Reportable Segments [Abstract]  
Schedule Of Operating Segments Information By Segment
 
Display
Technologies
  
Telecom-
munications
  
Environmental
Technologies
  
Specialty
Materials
  
Life
Sciences
  
All
Other
  
Total
Three months ended March 31, 2012
                                        
Net sales
$
705 
  
$
508 
  
$
263 
  
$
288 
  
$
155 
  
$
1 
  
$
1,920 
Depreciation (1)
$
129 
  
$
30 
  
$
28 
  
$
34 
  
$
10 
  
$
3 
  
$
234 
Amortization of purchased intangibles
      
$
3 
              
$
2 
        
$
5 
Research, development and engineering expenses (2)
$
27 
  
$
35 
  
$
26 
  
$
37 
  
$
6 
  
$
27 
  
$
158 
Equity in earnings (loss) of affiliated companies
$
182 
  
$
(4)
  
$
1 
              
$
4 
  
$
183 
Income tax (provision) benefit
$
(96)
  
$
(12)
  
$
(20)
  
$
(11)
  
$
(6)
  
$
10 
  
$
(135)
Net income (loss) (3)
$
421 
  
$
21 
  
$
40 
  
$
21 
  
$
12 
  
$
(20)
  
$
495 
                                         
Three months ended March 31, 2011
                                        
Net sales
$
790 
  
$
474 
  
$
259 
  
$
254 
  
$
144 
  
$
2 
  
$
1,923 
Depreciation (1)
$
124 
  
$
28 
  
$
25 
  
$
37 
  
$
8 
  
$
2 
  
$
224 
Amortization of purchased intangibles
      
$
1 
              
$
2 
        
$
3 
Research, development and engineering expenses (2)
$
25 
  
$
29 
  
$
23 
  
$
29 
  
$
4 
  
$
22 
  
$
132 
Equity in earnings of affiliated companies
$
294 
  
$
3 
        
$
3
        
$
7 
  
$
307 
Income tax (provision) benefit
$
(139)
  
$
(19)
  
$
(14)
  
$
(3)
  
$
(7)
  
$
9 
  
$
(173)
Net income (loss) (3)
$
638 
  
$
41 
  
$
29 
  
$
8 
  
$
15 
  
$
(15)
  
$
716 

(1)
Depreciation expense for Corning's reportable segments includes an allocation of depreciation of corporate property not specifically identifiable to a segment.
(2)
Research, development, and engineering expenses include direct project spending that is identifiable to a segment.
(3)
Many of Corning's administrative and staff functions are performed on a centralized basis.  Where practicable, Corning charges these expenses to segments based upon the extent to which each business uses a centralized function.  Other staff functions, such as corporate finance, human resources and legal, are allocated to segments, primarily as a percentage of sales.
Schedule Of Reconciliation Of Reportable Segment Net Income To Consolidated Net Income
 
Three months ended
March 31,
 
2012
  
2011
Net income of reportable segments
$
515 
  
$
731 
Non-reportable segments
  
(20)
    
(15)
Unallocated amounts:
          
Net financing costs (1)
  
(40)
    
(52)
Stock-based compensation expense
  
(24)
    
(23)
Exploratory research
  
(23)
    
(17)
Corporate contributions
  
(13)
    
(21)
Equity in earnings of affiliated companies, net of impairments (2)
  
35 
    
91 
Asbestos settlement (3)
  
(1)
    
(5)
Other corporate items 
  
33 
    
59 
Net income
$
462 
  
$
748 

(1)
Net financing costs include interest income, interest expense, and interest costs and investment gains associated with benefit plans.
(2)
Primarily represents the equity earnings of Dow Corning Corporation.
(3)
In the first quarter of 2012, Corning recorded a charge of $1 million to adjust the asbestos liability for the change in value of components of the Modified PCC Plan.  In the first quarter of 2011, Corning recorded a charge of $5 million to adjust the asbestos liability for the change in value of components of the Modified PCC Plan.