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Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical) - $ / shares
Sep. 30, 2020
Jun. 30, 2020
Sep. 30, 2019
Jun. 30, 2019
Common stock, par value $ 1 $ 1    
Total Par Value Of Common Shares [Member]        
Common stock, par value $ 1 $ 1 $ 1 $ 1