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Note 4 - Income Taxes (Details) - Provision for Income Taxes - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Provision for Income Taxes [Abstract]
Provision for income taxes	$ (6)	$ (395)	$ (202)	$ (747)
Effective tax rate	2.80%	28.00%	15.30%	33.50%

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- References

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- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 740



-SubTopic 10



-Section 50



-Paragraph 13



-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319



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-Name Accounting Standards Codification



-Topic 235



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-Section S99



-Paragraph 1



-Subparagraph (SX 210.4-08.(h)(2))



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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 740



-SubTopic 10



-Section 50



-Paragraph 9



-Subparagraph (a),(b)



-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319



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-Publisher FASB



-Name Accounting Standards Codification



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-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690



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-Name Accounting Standards Codification



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