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Equity And Earnings Per Share (Basic Table) (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Basic earnings per share:        
Net income available for common stockholders $ 42 $ 46 $ 241 $ 124
Weighted average shares of common stock outstanding:        
Weighted Average Number of Shares Outstanding, Basic 96,229,958 78,509,625 92,814,767 77,543,008
Basic earnings per share $ 0.44 $ 0.59 $ 2.60 $ 1.60
Common Class A [Member]        
Weighted average shares of common stock outstanding:        
Weighted Average Number of Shares Outstanding, Basic 96,229,858 78,509,525 92,814,667 77,542,908
Common Class B [Member]        
Weighted average shares of common stock outstanding:        
Weighted Average Number of Shares Outstanding, Basic 100 100 100 100