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Note 16 - Reportable Segments (Details) - Reportable Segments - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Segment Reporting Information [Line Items] |  |  |  |  |
Net sales |  | $ 2,272 | $ 2,540 | $ 6,880 | $ 7,311
Depreciation |  |  |  | 842 | 877
Amortization of purchased intangibles |  | 12 | 9 | 40 | 25
Research, development and engineering expenses |  | 181 | 199 | 561 | 605
Restructuring, impairment & other charges |  |  |  |  | 51
Equity in earnings of affiliated companies |  | 39 | 95 | 195 | 243
Income tax (provision) benefit |  | (6) | (395) | (202) | (747)
Net income (loss) |  | 212 | 1,014 | 1,115 | 1,484
Operating Segments [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net sales |  | 2,272 | 2,540 | 6,880 | 7,311
Depreciation | [1] | 273 | 287 | 826 | 863
Amortization of purchased intangibles |  | 12 | 9 | 39 | 25
Research, development and engineering expenses | [2] | 149 | 173 | 473 | 525
Restructuring, impairment & other charges |  | 2 |  | 4 | 51
Equity in earnings of affiliated companies |  | 1 | 1 | 4 | (1)
Income tax (provision) benefit |  | (185) | (212) | (580) | (639)
Net income (loss) | [3] | 389 | 533 | 1,237 | 1,208
Display Technologies [Member] | Operating Segments [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net sales |  | 757 | 1,009 | 2,354 | 2,925
Depreciation | [1] | 147 | 166 | 455 | 510
Research, development and engineering expenses | [2] | 28 | 31 | 78 | 117
Restructuring, impairment & other charges |  |  | 3 |  | 42
Equity in earnings of affiliated companies |  | (3) | (3) | (8) | (16)
Income tax (provision) benefit |  | (119) | (136) | (387) | (453)
Net income (loss) | [3] | 255 | 387 | 852 | 878
Optical Communications [Member] | Operating Segments [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net sales |  | 747 | 698 | 2,244 | 1,977
Depreciation | [1] | 41 | 38 | 122 | 111
Amortization of purchased intangibles |  | 7 | 3 | 24 | 7
Research, development and engineering expenses | [2] | 33 | 35 | 101 | 106
Restructuring, impairment & other charges |  |  |  | (1) | 12
Income tax (provision) benefit |  | (34) | (35) | (100) | (85)
Net income (loss) | [3] | 70 | 68 | 204 | 156
Environmental Technologies [Member] | Operating Segments [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net sales |  | 257 | 282 | 799 | 842
Depreciation | [1] | 32 | 29 | 93 | 89
Research, development and engineering expenses | [2] | 21 | 23 | 67 | 65
Equity in earnings of affiliated companies |  |  |  |  | 2
Income tax (provision) benefit |  | (19) | (28) | (64) | (72)
Net income (loss) | [3] | 38 | 57 | 132 | 147
Specialty Materials [Member] | Operating Segments [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net sales |  | 288 | 327 | 832 | 886
Depreciation | [1] | 29 | 30 | 82 | 86
Research, development and engineering expenses | [2] | 27 | 35 | 87 | 102
Restructuring, impairment & other charges |  | 2 |  | 5 |
Income tax (provision) benefit |  | (23) | (25) | (66) | (62)
Net income (loss) | [3] | 46 | 43 | 128 | 113
Life Sciences [Member] | Operating Segments [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net sales |  | 211 | 214 | 619 | 647
Depreciation | [1] | 15 | 15 | 45 | 46
Amortization of purchased intangibles |  | 5 | 6 | 15 | 18
Research, development and engineering expenses | [2] | 6 | 6 | 17 | 16
Income tax (provision) benefit |  | (9) | (9) | (26) | (26)
Net income (loss) | [3] | 18 | 19 | 52 | 54
Other Segments [Member] | Operating Segments [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net sales |  | 12 | 10 | 32 | 34
Depreciation | [1] | 9 | 9 | 29 | 21
Research, development and engineering expenses | [2] | 34 | 43 | 123 | 119
Restructuring, impairment & other charges |  |  | (3) |  | (3)
Equity in earnings of affiliated companies |  | 4 | 4 | 12 | 13
Income tax (provision) benefit |  | 19 | 21 | 63 | 59
Net income (loss) | [3] | $ (38) | $ (41) | $ (131) | $ (140)
[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.

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- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. Also included are the engineering expenses that are incurred while working on new product design, capacity, optimization programs, etc for products that are not currently being produced. + References No definition available. + Details
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