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Segment Information - Segment Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($) segment	Mar. 31, 2022 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment	2
Segment Reporting Information [Line Items]
Revenues	$ (283)	$ (300)
Segment expenses	165	196
Segment equity in earnings (losses) of investees	2	(11)
Less: Provision (benefit) for income taxes	23	18
Operating Segments
Segment Reporting Information [Line Items]
Revenues	(231)	(317)
Segment expenses	121	161
Segment equity in earnings (losses) of investees	30	(1)
Less: Provision (benefit) for income taxes	24	22
Insurance | Operating Segments Excluding Intersegment Elimination
Segment Reporting Information [Line Items]
Revenues	(188)	(276)
Insurance | Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenues	2	2
Insurance | Operating Segments
Segment Reporting Information [Line Items]
Revenues	(190)	(278)
Segment expenses	79	122
Segment equity in earnings (losses) of investees	30	(1)
Less: Provision (benefit) for income taxes	24	22
Segment adjusted operating income (loss)	117	133
Asset Management | Operating Segments Excluding Intersegment Elimination
Segment Reporting Information [Line Items]
Revenues	(25)	(30)
Asset Management | Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenues	16	9
Asset Management | Operating Segments
Segment Reporting Information [Line Items]
Revenues	(41)	(39)
Segment expenses	42	39
Segment equity in earnings (losses) of investees	0	0
Less: Provision (benefit) for income taxes	0	0
Segment adjusted operating income (loss)	$ (1)	$ 0

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