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Condensed Financial Information of Registrant - Condensed Statements of Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Condensed Financial Statements, Captions [Line Items]
Net income	$ 792	$ 659	$ 673
Statement of Other Comprehensive Income [Abstract]
Unrealized investment (loss) income	(204)	(55)	44
Less: effect of income taxes	(49)	(13)	11
Other comprehensive (loss) income, net of tax	(155)	(42)	33
Comprehensive income	637	617	706
Parent Company
Condensed Financial Statements, Captions [Line Items]
Net income	792	659	673
Statement of Other Comprehensive Income [Abstract]
Unrealized investment (loss) income	(204)	(55)	44
Less: effect of income taxes	(49)	(13)	11
Other comprehensive (loss) income, net of tax	(155)	(42)	33
Comprehensive income	$ 637	$ 617	$ 706

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