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Shareholders' Equity (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Dec. 10, 2019
Dec. 11, 2018
Sep. 30, 2020
Mar. 31, 2020
Sep. 30, 2019
Jun. 30, 2019
Class of Stock [Line Items]            
Stock dividend rate 5.00% 5.00%     5.00%  
Stock dividend common stock shares issued 463,193       465,473  
Shares repurchased during the period       5,335 121,200 35,600
2020 Share Repurchase Program [Member]            
Class of Stock [Line Items]            
Shares repurchased during the period     0 5,335    
Shares repurchased average price per share       $ 16.37    
Maximum [Member] | 2020 Share Repurchase Program [Member]            
Class of Stock [Line Items]            
Share repurchase program approved amount       $ 5