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Note 12 - Debt (Details) - Long-term Debt - USD ($) $ in Millions | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Current portion of long-term debt and short-term borrowings |  |
Current portion of long-term debt | $ 91 | $ 36
Total current portion of long-term debt and short-term borrowings | 572 | 36
Long-term debt |  |
Long term debt | 4,001 | 3,263
Long-term debt | 3,910 | 3,227
Commercial Paper [Member] |  |
Current portion of long-term debt and short-term borrowings |  |
Commercial paper | 481 |
Debentures, 8.875%, Due 2016 [Member] |  |
Long-term debt |  |
Debentures | 64 | 66
Debentures, 1.45%, Due 2017 [Member] |  |
Long-term debt |  |
Debentures | 250 | 250
Debentures 1.5%, Due 2018 [Member] |  |
Long-term debt |  |
Debentures | 375 |
Debentures 6.625% Due 2019 [Member] |  |
Long-term debt |  |
Debentures | 246 | 243
Debentures 4.25% Due 2020 [Member] |  |
Long-term debt |  |
Debentures | 291 | 287
Debentures, 8.875%, Due 2021 [Member] |  |
Long-term debt |  |
Debentures | 68 | 69
Debentures 2.9%, Due 2022 [Member] |  |
Long-term debt |  |
Debentures | 374 |
Debentures, 3.70%, due 2023 [Member] |  |
Long-term debt |  |
Debentures | 249 | 249
Medium Term Notes Average Rate 7.66% Due Through 2023 [Member] |  |
Long-term debt |  |
Debentures | 45 | 45
Debentures 7.00% Due 2024 [Member] |  |
Long-term debt |  |
Debentures | 99 | 99
Debentures 6.85% Due 2029 [Member] |  |
Long-term debt |  |
Debentures | 169 | 170
Debentures Callable 7.25% Due 2036 [Member] |  |
Long-term debt |  |
Debentures | 249 | 249
Debentures, 4.70%, Due 2037 [Member] |  |
Long-term debt |  |
Debentures | 250 | 250
Debentures 5.75% Due 2040 [Member] |  |
Long-term debt |  |
Debentures | 398 | 398
Debentures, 4.75%, Due 2042 [Member] |  |
Long-term debt |  |
Debentures | 499 | 499
Other Average Rate 5.02%, Due Through 2042 [Member] |  |
Long-term debt |  |
Long term debt | $ 375 | $ 389

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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 + Details
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