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Note 9 - Annual Maturities of Long-Term Debt and Finance Leases (Details)
$ in Millions
Dec. 31, 2019
USD ($)
Annual Maturities Of Long Term Debt [Abstract]  
2020 $ 2
2021 92
2022 2
2023 1
2024 1
2025 and thereafter 13
Total 111
2020 2
2021 114
2022 2
2023 1
2024 1
2025 and thereafter 13
Total $ 133