Note 6 - Commitments and Contingencies (Details Textual) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 14, 2023	Dec. 31, 2022	Jul. 28, 2020
Restricted Cash, Total	$ 69
U S International Development Finance Corporation [Member]
Line of Credit Facility, Maximum Borrowing Capacity				$ 765
BRAZIL
Restricted Cash and Investments, Noncurrent	6		$ 6
Federal And State Value Added Taxes Litigations And Civil Litigation And Disputes With Former Employees [Member] | BRAZIL
Loss Contingency, Accrual, Reserve Maintained	2
Aggregate Claims	118
Loss Contingency, Estimate of Possible Loss	6
Threat of Expropriation of Assets [Member] | BRAZIL
Restricted Cash and Investments, Noncurrent	6
Assets, Noncurrent	42
Bank Guarantees And Letters Of Credit [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted	1
Surety Bond [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted	29
Amended A B L Credit Agreement [Member]
Long-Term Line of Credit, Total	58
Line of Credit Facility, Maximum Borrowing Capacity		$ 90
L C Facility Agreement [Member]
Long-Term Line of Credit, Total	$ 43