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Note 8 - Annual Maturities of Long-Term Debt (Details)
$ in Millions
Dec. 31, 2015
USD ($)
Annual Maturities Of Long Term Debt [Abstract]  
2016 $ 4
2017 4
2018 4
2019 392
2020 271
2021 and thereafter 2
Total 677
2016 4
2017 4
2018 4
2019 397
2020 276
2021 and thereafter 2
Total $ 687