Note 1 - Significant Accounting Policies - Supplemental Disclosure of Cash Flow Information (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accruals for capital expenditures		$ 357	$ 231	$ 592
Interest (1)	[1]	287	298	248
Income taxes, net of refunds received		$ 377	$ 220	$ 474

[1] Included in this amount are approximately $36 million, $58 million and $54 million of interest costs that were capitalized as part of property, plant and equipment, net of accumulated depreciation, in 2021, 2020 and 2019, respectively.