Net Income Per Share - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Apr. 30, 2013
Schedule Of Earnings Per Share [Line Items]
Common stock, shares outstanding	45,187,327		45,187,327
Par value of common stock issued	$ 0.01		$ 0.01		$ 0.01
Earnings Per Share, Basic	1.44	$ 7.50	0.42	$ 7.56
Earnings Per Share, Diluted	$ 1.41	$ 7.41	$ 0.41	$ 7.48
Noncontrolling Interest, Change in Redemption Value	$ 0	$ 0	$ 0	$ 0
Net Income (Loss) Available to Common Stockholders, Basic	$ 66	$ 340	$ 19	$ 347
Stock Repurchased During Period, Shares			325,068
Common Stock [Member]
Schedule Of Earnings Per Share [Line Items]
Number of new common stock issued			213,570