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Note 8 - Annual Maturities of Long-Term Debt and Capital Leases (Details)
$ in Millions
Dec. 31, 2017
USD ($)
Annual Maturities Of Long Term Debt [Abstract]  
2018 $ 4
2019 395
2020 1
2022 1
2023 and thereafter 2
Total 403
2018 4
2019 397
2020 1
2022 1
2023 and thereafter 2
Total $ 405