Note 9 - Commitments and Contingencies (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Commitments And Contingencies [Line Items]
Operating Leases, Rent Expense, Net	$ 26	$ 28	$ 36
Federal and State Value added Taxes Litigations [Member]
Commitments And Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	59
Threat of Expropriation of Assets [Member] | BRAZIL
Commitments And Contingencies [Line Items]
Assets, Noncurrent		73
Threat of Expropriation of Assets [Member] | BRAZIL | Cash [Member]
Commitments And Contingencies [Line Items]
Restricted Cash		$ 7
Amended Credit Agreement [Member]
Commitments And Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	116
Bank Guarantees and Letters of Credit [Member]
Commitments And Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	5
Surety Bond [Member]
Commitments And Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	17
Restricted Cash Deposits [Member]
Commitments And Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 51