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Equity And Earnings Per Share (Basic Table) (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Basic earnings per share:    
Net income available for common stockholders $ 107 $ 46
Weighted average shares of common stock outstanding:    
Weighted Average Number of Shares Outstanding, Basic 90,789,321 76,751,168
Basic earnings per share $ 1.18 $ 0.60
Common Class A [Member]    
Weighted average shares of common stock outstanding:    
Weighted Average Number of Shares Outstanding, Basic 90,789,221 76,751,068
Common Class B [Member]    
Weighted average shares of common stock outstanding:    
Weighted Average Number of Shares Outstanding, Basic 100 100