Note 18 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Net operating loss carryforwards	$ 187	$ 220
Postretirement benefits, including pensions	71	92
Research and development costs	169	149
Expense accruals	77	76
Other tax credits recoverable	218	219
Deferred Tax Assets, Capital Loss Carryforwards	56	47
Inventory reserves	25	25
Postemployment and other benefits	4	5
Intangibles	1	17
Leasing activities	55	43
Other	26	35
Total	889	928
Valuation allowances	(258)	(259)
Deferred tax assets	631	669
Unremitted earnings	(10)	(10)
Depreciation	(74)	(87)
Deferred tax liabilities	(84)	(97)
Net deferred tax assets	$ 547	$ 572