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Equity And Earnings Per Share (Diluted Table) (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Diluted earnings per share:      
Net income available for common stockholders $ 308 $ 195 $ 161
Weighted Average Shares Outstanding [Abstract]      
Weighted Average Number of Shares Outstanding, Basic 94,167,572 79,939,289 76,121,570
Potentially dilutive common shares:      
Issuable pursuant to employee incentive plans 842,308 699,619 704,293
Weighted Average Number of Shares Outstanding, Diluted 95,009,880 80,638,908 76,825,863
Earnings Per Share, Diluted $ 3.24 $ 2.42 $ 2.10
Common Class A [Member]      
Weighted Average Shares Outstanding [Abstract]      
Weighted Average Number of Shares Outstanding, Basic 94,167,472 79,939,189 76,121,470
Common Class B [Member]      
Weighted Average Shares Outstanding [Abstract]      
Weighted Average Number of Shares Outstanding, Basic 100 100 100