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Note 5 - Gross Carrying Amount and Accumulated Amortization by Major Intangible Asset Category (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Finite Lived Intangible Assets [Line Items] |  |
Accumulated Amortization | $ 71 | $ 69
Intangible Assets Net | 48 |
Intangible assets gross | 157 | 190
Intangible assets net | 86 | 121
Trade Names [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 38 | 40
Technology-Based Intangible Assets [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 105 | 122
Accumulated Amortization | 64 | 57
Intangible Assets Net | $ 41 | $ 65
Weighted-Average Amortization Period | 6 years | 6 years
Customer-Related Intangible Assets [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 11 | $ 26
Accumulated Amortization | 6 | 12
Intangible Assets Net | $ 5 | $ 14
Weighted-Average Amortization Period | 6 years | 6 years
Other Intangible Assets [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 3 | $ 2
Accumulated Amortization | 1 |
Intangible Assets Net | $ 2 | $ 2
Weighted-Average Amortization Period | 21 years | 21 years

X
- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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