Note 14 - Income Taxes (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule Of Income Taxes [Line Items]
Operating Loss Carryforwards	$ 1,657
Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration	499
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	1,158
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	335	$ 314
Accumulated Deferred Investment Tax Credit	$ 71
Operating Loss Carryforwards Limitations Minimum Ownership Change Percentage	50.00%
Deferred Tax Liabilities, Undistributed Foreign Earnings, Net of Provision for Withholding Tax	$ 56	102
Provision For Withholding Tax On Undistributed Foreign Earnings	20	19
Deferred Tax Assets, Valuation Allowance	1,209	1,201
Deferred Tax Assets, Net of Valuation Allowance	19	27
Income Tax Examination, Penalties and Interest Accrued	23	21
Uncertain Tax Benefits	36	36
Minimum [Member]
Schedule Of Income Taxes [Line Items]
Decrease in Unrecognized Tax Benefits is Reasonably Possible	0
Maximum [Member]
Schedule Of Income Taxes [Line Items]
Decrease in Unrecognized Tax Benefits is Reasonably Possible	15
Foreign Tax Authority [Member]
Schedule Of Income Taxes [Line Items]
Deferred Tax Assets, Valuation Allowance	237	266
Deferred Tax Assets, Net of Valuation Allowance	312	344
Liability for Uncertain Tax Positions, Current			$ 8
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued			2
Other Tax Expense (Benefit)			$ (10)
Domestic Tax Authority [Member]
Schedule Of Income Taxes [Line Items]
Deferred Tax Assets, Valuation Allowance	972	935
Deferred Tax Assets, Net of Valuation Allowance	$ 916	$ 884