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Note 7 - Investments (Details) - Financial Position - USD ($) $ in Millions | Dec. 31, 2015 | Dec. 31, 2014
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Affiliated Companies [Member] |  |
Note 7 - Investments (Details) - Financial Position [Line Items] |  |
Current assets | $ 5,228 | $ 5,432
Noncurrent assets | 6,453 | 6,864
Short-term borrowings, including current portion of long-term debt | 6 | 7
Other current liabilities | 1,461 | 1,630
Long-term debt | 800 | 950
Other long-term liabilities | 4,557 | 5,143
Non-controlling interest | 631 | 634
Balances due from affiliated companies | 11 | 19
Balances due to affiliated companies | 1 | 2
Dow Corning Corporation [Member] |  |
Note 7 - Investments (Details) - Financial Position [Line Items] |  |
Current assets | 4,511 | 4,712
Noncurrent assets | 6,064 | 6,433
Short-term borrowings, including current portion of long-term debt | 6 | 7
Other current liabilities | 1,305 | 1,441
Long-term debt | 785 | 945
Other long-term liabilities | 4,539 | 5,125
Non-controlling interest | $ 631 | $ 634

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