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Note 12 - Debt (Tables) | 12 Months Ended
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Dec. 31, 2015
Debt Disclosure [Abstract] |
Schedule of Debt [Table Text Block] |
| December 31,
| 2015 |  | 2014
Current portion of long-term debt and short-term borrowings |  |  |  |  |
Current portion of long-term debt | $ | 91 |  | $ | 36
Commercial paper |  | 481 |  |  |
Total current portion of long-term debt and short-term borrowings | $ | 572 |  | $ | 36
Long-term debt |  |  |  |  |
Debentures, 8.875%, due 2016 | $ | 64 |  | $ | 66
Debentures, 1.45%, due 2017 |  | 250 |  |  | 250
Debentures, 1.5%, due 2018 |  | 375 |  |  |
Debentures, 6.625%, due 2019 |  | 246 |  |  | 243
Debentures, 4.25%, due 2020 |  | 291 |  |  | 287
Debentures, 8.875%, due 2021 |  | 68 |  |  | 69
Debentures, 2.9%, due 2022 |  | 374 |  |  |
Debentures, 3.70%, due 2023 |  | 249 |  |  | 249
Medium-term notes, average rate 7.66%, due through 2023 |  | 45 |  |  | 45
Debentures, 7.00%, due 2024 |  | 99 |  |  | 99
Debentures, 6.85%, due 2029 |  | 169 |  |  | 170
Debentures, callable, 7.25%, due 2036 |  | 249 |  |  | 249
Debentures, 4.70%, due 2037 |  | 250 |  |  | 250
Debentures, 5.75%, due 2040 |  | 398 |  |  | 398
Debentures, 4.75%, due 2042 |  | 499 |  |  | 499
Other, average rate 5.02%, due through 2042 |  | 375 |  |  | 389
Total long-term debt |  | 4,001 |  |  | 3,263
Less current portion of long-term debt |  | 91 |  |  | 36
Long-term debt | $ | 3,910 |  | $ | 3,227
Schedule of Maturities of Long-term Debt [Table Text Block] |
| 2016 |  | 2017 |  | 2018 |  | 2019 |  | 2020 |  | Thereafter
| $572 |  | $257 |  | $378 |  | $253 |  | $304 |  | $2,713

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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