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Note 12 - Income Taxes - Reconciliation of Income Tax Expense (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Income tax expense $ 43 $ 23 $ 67 $ 44
Effective income tax rate 26.00% 28.00% 26.00% 34.00%