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Note 10 - Income Taxes - Reconciliation of Income Tax Expense (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Statutory federal rate applied to income before income tax expense | $ 53 | $ 60 | $ 68
Current year permanent items | 13 | 3 | 2
State and local taxes, net of federal tax benefit | 13 | 14 | 8
Change in valuation allowance | (2) | 0 | (2)
Reserve for uncertain tax positions | 0 | 0 | 1
Rate change due to enactment of tax reform | 0 | 0 | (146)
Other items, net | (1) | 0 | 0
Income tax expense (benefit) as recorded | $ 76 | $ 77 | $ (69)
Effective income tax rate | 30.00% | 27.00% | (36.00%)

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