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Note 5 - Annual Maturities of Long-Term Debt and Finance Leases (Details)
$ in Millions
Sep. 30, 2021
USD ($)
Annual Maturities Of Long Term Debt [Abstract]  
Q4 2021 $ 1
2022 2
2023 1
2024 1
2025 1
2026 and thereafter 246
Total 252
Q4 2021 1
2022 2
2023 1
2024 1
2025 1
2026 and thereafter 317
Total $ 323