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Summary of Revenues of Major Product Groups for Segments and Corporate and Other (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Segment Reporting Information [Line Items]
Revenues	$ 1,769	$ 1,892	$ 3,633	$ 3,746
Enact
Segment Reporting Information [Line Items]
Revenues	298	277	590	558
Long-Term Care Insurance segment
Segment Reporting Information [Line Items]
Revenues	1,011	1,143	2,116	2,241
Life and Annuities Segment
Segment Reporting Information [Line Items]
Revenues	454	469	915	948
Life and Annuities Segment | Life Insurance
Segment Reporting Information [Line Items]
Revenues	352	350	706	708
Life and Annuities Segment | Fixed annuities
Segment Reporting Information [Line Items]
Revenues	70	84	143	169
Life and Annuities Segment | Variable annuities
Segment Reporting Information [Line Items]
Revenues	32	35	66	71
Corporate and Other
Segment Reporting Information [Line Items]
Revenues	$ 6	$ 3	$ 12	$ (1)

X

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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