Note 18 - Income Taxes (Details Textual) - USD ($) $ in Millions	3 Months Ended			12 Months Ended
	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount				$ 60	$ (102)	$ (22)
Effective Income Tax Rate Reconciliation, Tax Credit, Amount, Total				55	62	87
Goodwill, Impairment Loss	$ 51			51	6
Other Tax Expense (Benefit)				(1)
Income Tax Expense (Benefit), Intercompany Sale of Assets				12
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement			$ (258)		(259)
Income Tax Expense (Benefit), Total				58	(32)	78
Effective Income Tax Rate Reconciliation, State Law Change, Amount					6
Effective Income Tax Rate Reconciliation, Deduction, Other, Amount			$ 48
Effective Income Tax Rate Reconciliation, State Law Changes and Development and Implementation of Tax Planning, Amount						(44)
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities				21		11
Income Tax Reconciliation, Benefit of Repatriation of Foreign Earnings						7
Tax Adjustments, Settlements, and Unusual Provisions						5
Effective Income Tax Rate Reconciliation, Future Repatriation of Foreign Earnings, Amount				6	3	(7)
Payments for Other Taxes				9	10	11
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries				5
Intercompany Loan Obligations to Parent				1,338
Intercompany Loan Obligations to Parent Considered Permanently Invested				21
Deferred Tax Assets, Capital Loss Carryforwards				47	42
Deferred Tax Assets, Tax Credit Carryforwards, Total				234
Tax Credit Carryforward, Valuation Allowance				19
Operating Loss Carryforwards, Total				190
Unrecognized Tax Benefits, Interest on Income Taxes Accrued				6	12
Unrecognized Tax Benefits that Would Impact Effective Tax Rate				$ 68
Minimum [Member]
Tax Loss Carryforward Period (Year)				10 years
Maximum [Member]
Tax Loss Carryforward Period (Year)				20 years
Pension Plan, Defined Benefit [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount					(18)
Pension Plan [Member]
Income Tax Expense (Benefit), Total					11
Domestic Tax Authority [Member]
Effective Income Tax Rate Reconciliation, Tax Credit, Amount, Total				$ 37
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards Subject to Limitation, Annual Limit				84
AUSTRALIA
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount				$ (26)
BRAZIL
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount		$ (22)			(22)
UNITED STATES
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount						$ (5)
UNITED STATES | Income Projections [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount					(34)
UNITED STATES | Tax Credits [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount					$ (30)