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Stockholders' Equity - Capital Stock and Share Repurchases (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Sep. 30, 2022
Jun. 30, 2022
Sep. 30, 2021
Jun. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Equity [Abstract]            
Number of shares repurchased (in shares) 0 8,850,912 2,112,212 1,750,000 8,850,912 3,862,212
Average price per share (in dollars per share) $ 0 $ 30.09 $ 39.10 $ 38.52 $ 30.09 $ 38.84
Amount $ 0 $ 266 $ 83 $ 67 $ 266 $ 150