Investments (excluding Consolidated Investment Entities) - Loans by Property Type (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Year of Origination 2024 [Member] | Retail
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	$ 58
Year of Origination 2024 [Member] | Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	154
Year of Origination 2024 [Member] | Apartments
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	57
Year of Origination 2024 [Member] | Office
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	15
Year of Origination 2024 [Member] | Hotel/Motel
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	0
Year of Origination 2024 [Member] | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	0
Year of Origination 2024 [Member] | Mixed Use
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	0
Year of Origination 2024 [Member] | Total Segment
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	284
Year of Origination 2023 | Retail
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	124	$ 125
Year of Origination 2023 | Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	172	164
Year of Origination 2023 | Apartments
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	13	33
Year of Origination 2023 | Office
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	16	18
Year of Origination 2023 | Hotel/Motel
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	32	32
Year of Origination 2023 | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	0	0
Year of Origination 2023 | Mixed Use
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	0	0
Year of Origination 2023 | Total Segment
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	357	372
Year of Origination 2022 | Retail
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	79	79
Year of Origination 2022 | Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	261	263
Year of Origination 2022 | Apartments
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	222	255
Year of Origination 2022 | Office
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	35	34
Year of Origination 2022 | Hotel/Motel
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	10	10
Year of Origination 2022 | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	9	10
Year of Origination 2022 | Mixed Use
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	0	0
Year of Origination 2022 | Total Segment
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	616	651
Year of Origination 2021 | Retail
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	35	36
Year of Origination 2021 | Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	128	145
Year of Origination 2021 | Apartments
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	218	335
Year of Origination 2021 | Office
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	111	123
Year of Origination 2021 | Hotel/Motel
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	0	0
Year of Origination 2021 | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	18	18
Year of Origination 2021 | Mixed Use
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	9	10
Year of Origination 2021 | Total Segment
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	519	667
Year of Origination 2020 | Retail
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	55	57
Year of Origination 2020 | Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	48	49
Year of Origination 2020 | Apartments
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	56	72
Year of Origination 2020 | Office
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	96	128
Year of Origination 2020 | Hotel/Motel
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	0	0
Year of Origination 2020 | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	0	0
Year of Origination 2020 | Mixed Use
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	0	0
Year of Origination 2020 | Total Segment
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	255	306
Year of Origination 2019 | Retail
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	610	45
Year of Origination 2019 | Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	713	82
Year of Origination 2019 | Apartments
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	640	160
Year of Origination 2019 | Office
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	437	36
Year of Origination 2019 | Hotel/Motel
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	67	11
Year of Origination 2019 | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	155	0
Year of Origination 2019 | Mixed Use
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	46	0
Year of Origination 2019 | Total Segment
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	2,668	334
Year of Origination 2018 | Retail
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans		780
Year of Origination 2018 | Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans		755
Year of Origination 2018 | Apartments
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans		618
Year of Origination 2018 | Office
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans		463
Year of Origination 2018 | Hotel/Motel
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans		60
Year of Origination 2018 | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans		163
Year of Origination 2018 | Mixed Use
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans		49
Year of Origination 2018 | Total Segment
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans		2,888
Total Segment | Retail
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	961	1,122
Total Segment | Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	1,476	1,458
Total Segment | Apartments
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	1,206	1,473
Total Segment | Office
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	710	802
Total Segment | Hotel/Motel
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	109	113
Total Segment | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	182	191
Total Segment | Mixed Use
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	55	59
Total Segment | Total Segment
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	$ 4,699	$ 5,218