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Note 5 - Commitments and Contingencies (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2015
Jun. 30, 2015
Dec. 31, 2014
Note 5 - Commitments and Contingencies (Details) [Line Items]      
Gain on Environmental Liabilities $ 5    
Other Increase (Decrease) in Environmental Liabilities $ 5    
Restricted Cash and Cash Equivalents, Noncurrent   $ 40 $ 37
BRAZIL      
Note 5 - Commitments and Contingencies (Details) [Line Items]      
Loss Contingency, Estimate of Possible Loss   57  
Bank Guarantees and Letters of Credit [Member]      
Note 5 - Commitments and Contingencies (Details) [Line Items]      
Guarantor Obligations, Maximum Exposure, Undiscounted   5  
Surety Bond [Member]      
Note 5 - Commitments and Contingencies (Details) [Line Items]      
Guarantor Obligations, Maximum Exposure, Undiscounted   19  
Restricted Cash Deposits [Member]      
Note 5 - Commitments and Contingencies (Details) [Line Items]      
Guarantor Obligations, Maximum Exposure, Undiscounted   59  
Threat of Expropriation of Assets [Member] | Cash [Member] | BRAZIL      
Note 5 - Commitments and Contingencies (Details) [Line Items]      
Restricted Cash and Cash Equivalents, Noncurrent   7  
Threat of Expropriation of Assets [Member] | Collateralized Debt Obligations [Member] | BRAZIL      
Note 5 - Commitments and Contingencies (Details) [Line Items]      
Assets, Noncurrent   77  
Asset Based Revolving Credit Facility [Member]      
Note 5 - Commitments and Contingencies (Details) [Line Items]      
Guarantor Obligations, Maximum Exposure, Undiscounted   $ 119