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Reportable Segments (Tables)
 6 Months Ended
Jun. 30, 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 June 30, 2012
                                        
  Net sales
$
641 
  
$
559 
  
$
249 
  
$
296 
  
$
162 
  
$
1 
  
$
1,908 
  Depreciation (1)
$
125 
  
$
34 
  
$
29 
  
$
36 
  
$
10 
  
$
3 
  
$
237 
  Amortization of purchased intangibles
      
$
2 
              
$
2 
        
$
4 
  Research, development and engineering expenses (2)
$
26 
  
$
35 
  
$
26 
  
$
37 
  
$
5 
  
$
29 
  
$
158 
  Equity in earnings of affiliated companies
$
184 
  
$
2 
                    
$
9 
  
$
195 
  Income tax (provision) benefit
$
(78)
  
$
(17)
  
$
(17)
  
$
(17)
  
$
(5)
  
$
12 
  
$
(122)
  Net income (loss) (3)
$
371 
  
$
36 
  
$
34 
  
$
34 
  
$
11 
  
$
(16)
  
$
470 
                                         
Three months ended June 30, 2011
                                        
  Net sales
$
760 
  
$
548 
  
$
258 
  
$
283 
  
$
155 
  
$
1 
  
$
2,005 
  Depreciation (1)
$
123 
  
$
32 
  
$
27 
  
$
42 
  
$
9 
  
$
3 
  
$
236 
  Amortization of purchased intangibles
      
$
2 
              
$
2 
        
$
4 
  Research, development and engineering expenses (2)
$
27 
  
$
32 
  
$
23 
  
$
36 
  
$
5 
  
$
24 
  
$
147 
  Equity in earnings of affiliated companies
$
319 
  
$
1 
  
$
1
  
$
5 
        
$
2 
  
$
328 
  Income tax (provision) benefit
$
(118)
  
$
(22)
  
$
(15)
  
$
(9)
  
$
(7)
  
$
10 
  
$
(161)
  Net income (loss) (3)
$
626 
  
$
46 
  
$
32 
  
$
23 
  
$
15 
  
$
(20)
  
$
722
                                         
Six months ended June 30, 2012
                                        
  Net sales
$
1,346 
  
$
1,067 
  
$
512 
  
$
584 
  
$
317 
  
$
2 
  
$
3,828 
  Depreciation (1)
$
254 
  
$
64 
  
$
57 
  
$
70 
  
$
20 
  
$
6 
  
$
471 
  Amortization of purchased intangibles
      
$
5 
              
$
4 
        
$
9 
  Research, development and engineering expenses (2)
$
53 
  
$
70 
  
$
52 
  
$
74 
  
$
11 
  
$
56 
  
$
316 
  Equity in earnings (loss) of affiliated companies
$
366 
  
$
(2)
  
$
1 
              
$
13 
  
$
378 
  Income tax (provision) benefit
$
(174)
  
$
(29)
  
$
(37)
  
$
(28)
  
$
(11)
  
$
22 
  
$
(257)
  Net income (loss) (3)
$
792 
  
$
57 
  
$
74 
  
$
55 
  
$
23 
  
$
(36)
  
$
965 
                                         
Six months ended June 30, 2011
                                        
  Net sales
$
1,550 
  
$
1,022 
  
$
517 
  
$
537 
  
$
299 
  
$
3 
  
$
3,928 
  Depreciation (1)
$
247 
  
$
60 
  
$
52 
  
$
79 
  
$
17 
  
$
5 
  
$
460 
  Amortization of purchased intangibles
      
$
3 
              
$
4 
        
$
7 
  Research, development and engineering expenses (2)
$
52 
  
$
61 
  
$
46 
  
$
65 
  
$
9 
  
$
46 
  
$
279 
  Equity in earnings of affiliated companies
$
613 
  
$
4 
  
$
1 
  
$
8 
        
$
9 
  
$
635 
  Income tax (provision) benefit
$
(257)
  
$
(41)
  
$
(29)
  
$
(12)
  
$
(14)
  
$
19 
  
$
(334)
  Net income (loss) (3)
$
1,264 
  
$
87 
  
$
61 
  
$
31 
  
$
30 
  
$
(35)
  
$
1,438 
 
(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
June 30,
  
Six months ended
June 30,
 
2012
  
2011
  
2012
  
2011
Net income of reportable segments
$
486 
  
$
742 
  
$
1,001 
  
$
1,473 
Non-reportable segments
  
(16)
    
(20)
    
(36)
    
(35)
Unallocated amounts:
                      
Net financing costs (1)
  
(44)
    
(47)
    
(84)
    
(99)
Stock-based compensation expense
  
(16)
    
(22)
    
(40)
    
(45)
Exploratory research
  
(24)
    
(19)
    
(47)
    
(36)
Corporate contributions
  
(10)
    
(11)
    
(23)
    
(32)
Equity in earnings of affiliated companies, net of impairments (2)
  
64 
    
100 
    
99 
    
191 
Asbestos settlement (3)
  
(5)
    
(5)
    
(6)
    
(10)
Other corporate items 
  
27 
    
37 
    
60 
    
96 
Net income
$
462 
  
$
755 
  
$
924 
  
$
1,503 

(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 three and six months ended June 30, 2012, Corning recorded a charge of $5 million and $6 million, respectively, to adjust the asbestos liability for the change in value of the components of the Amended PCC Plan. In the three and six months ended June 30, 2011, Corning recorded a charge of $5 million and $10 million, respectively, to adjust the asbestos liability for the change in value of the components of the Amended PCC Plan.