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Consolidated Statement of Changes in Equity (Unaudited) (Parenthetical) - $ / shares
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Statement of Stockholders' Equity [Abstract]        
Cash dividends per Common Share (USD per share) $ 0.45 $ 0.40 $ 1.35 $ 2.70