Condensed Financial Information of Registrant - Condensed Statements of Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenue:
Investment income and other revenue	$ 75	$ 77	$ 17
Revenues	31,974	27,771	19,423
Expenses:
General and administrative expenses	2,311	2,068	1,480
Depreciation and amortization	176	131	88
Impairment	208	0	0
Total operating expenses	30,801	26,751	18,345
Operating income	1,173	1,020	1,078
Interest expense	110	120	102
Other expenses, net	0	25	15
Income tax benefit	271	216	288
Net income	792	659	673
Parent Company
Revenue:
Administrative services fees	1,826	1,496	1,208
Investment income and other revenue	8	11	13
Revenues	1,834	1,507	1,221
Expenses:
General and administrative expenses	1,721	1,424	1,089
Depreciation and amortization	141	98	67
Impairment	138	0	0
Other	0	5	24
Total operating expenses	2,000	1,527	1,180
Operating income	(166)	(20)	41
Interest expense	110	120	102
Other expenses, net	0	25	15
Total other expenses, net	110	145	117
Loss before income tax benefit and equity in net earnings of subsidiaries	(276)	(165)	(76)
Income tax benefit	(42)	(21)	(5)
Net loss before equity in net earnings of subsidiaries	(234)	(144)	(71)
Equity in net earnings of subsidiaries	1,026	803	744
Net income	$ 792	$ 659	$ 673