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Parent Only Statements - Balance Sheets-Labels (Details) - USD ($)
$ / shares in Units, $ in Thousands
Dec. 31, 2020
Nov. 30, 2020
Oct. 31, 2020
Dec. 31, 2019
Condensed Financial Statements, Captions [Line Items]        
Preferred stock, par value/stated value (in dollars per share) $ 0.20     $ 0.20
Preferred stock, shares authorized (in shares) 20,000,000     20,000,000
Common stock, par value (in dollars per share) $ 0.20     $ 0.20
Common stock, shares authorized (in shares) 1,125,000,000     1,125,000,000
Common stock, shares issued (in shares) 456,700,000     453,600,000
Accumulated other comprehensive income, tax $ 10,908     $ 3,995
Common stock held in treasury (In shares) 81,400,000     32,500,000
Series B Preferred Stock        
Condensed Financial Statements, Captions [Line Items]        
Preferred stock, par value/stated value (in dollars per share) $ 100     $ 100
Common stock, par value (in dollars per share)   $ 45    
Common stock, shares authorized (in shares)     2,000,000  
Common stock, shares issued (in shares)   1,489,304    
Parent Company        
Condensed Financial Statements, Captions [Line Items]        
Preferred stock, par value/stated value (in dollars per share) $ 0.20     $ 0.20
Preferred stock, shares authorized (in shares) 20,000,000     20,000,000
Common stock, par value (in dollars per share) $ 0.20     $ 0.20
Common stock, shares authorized (in shares) 1,125,000,000     1,125,000,000
Common stock, shares issued (in shares) 456,700,000     453,600,000
Accumulated other comprehensive income, tax $ 10,908     $ 3,995
Common stock held in treasury (In shares) 81,400,000     32,500,000
Parent Company | Series B Preferred Stock        
Condensed Financial Statements, Captions [Line Items]        
Preferred stock, par value/stated value (in dollars per share) $ 100     $ 100
Preferred stock, shares issued (in shares) 2,500,000     4,000,000