Consolidated Statements of Stockholders' Equity (Deficit) - USD ($)		Total		Common Stock	Additional Paid-in Capital	Accumulated Retained Earnings
Beginning balance, value at Dec. 31, 2016		$ 167,000,000		$ 1,000,000	$ 138,000,000	$ 28,000,000
Beginning balance, shares at Dec. 31, 2016				99,000,000
Net income		326,777,744	[1]			327,000,000
Deferred intercompany transaction	[2]	9,000,000			9,000,000
Activity related to share-based compensation		12,000,000			12,000,000
Other	[2]	3,000,000			3,000,000
Ending balance, value at Dec. 31, 2017		518,000,000		$ 1,000,000	162,000,000	355,000,000
Ending balance, shares at Dec. 31, 2017				99,000,000
Net income		298,124,983	[1],[3]			298,000,000
Activity related to share-based compensation		13,000,000			13,000,000
Repurchase and retirement of common stock		(183,000,000)			(7,000,000)	(176,000,000)
Repurchase and retirement of common stock, shares				(5,000,000)
Revenue recognition cumulative-effect adjustment		(38,000,000)				(38,000,000)
Capital contribution from Parent		3,000,000			3,000,000
Other		5,000,000			3,000,000	2,000,000
Ending balance, value at Dec. 31, 2018		$ 616,000,000		$ 1,000,000	174,000,000	441,000,000
Ending balance, shares at Dec. 31, 2018		94,558,086		94,000,000
Net income		$ 215,695,961	[1],[3]			216,000,000
Activity related to share-based compensation		22,000,000			22,000,000
Repurchase and retirement of common stock		(283,000,000)			(17,000,000)	(266,000,000)
Repurchase and retirement of common stock, shares				(9,000,000)
Other		(1,000,000)				(1,000,000)
Ending balance, value at Dec. 31, 2019		$ 570,000,000		$ 1,000,000	$ 179,000,000	$ 390,000,000
Ending balance, shares at Dec. 31, 2019		85,535,501		85,000,000

[1] Net income for years ended December 31, 2019, 2018, and 2017 was $215,695,961; $298,124,983 and $326,777,744, respectively.

[2] Includes pre-spin tax adjustment.

[3] The sum of the earnings per share for the four quarters may differ from annual earnings per share due to the required method of computing the weighted average shares in interim periods.