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Consolidated Statements of Capitalization - Capital Stock (Parenthetical)
Dec. 31, 2019
$ / shares
shares
Preferred stock - par value | $ / shares $ 100
Preferred stock, no par value | $ / shares
Common equity, shares authorized 25,000,000
Preferred Stock Par Value [Member]  
Preferred stock, shares authorized 1,500,000
Preferred stock, shares outstanding 0
Preferred Stock No Par Value [Member]  
Preferred stock, shares authorized 2,500,000
Preferred stock, shares outstanding 0
Preference Stock No Par Value  
Preferred stock, shares authorized 2,500,000
Preferred stock, shares outstanding 0