Investments (excluding Consolidated Investment Entities) - Loans by Property Type (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	$ 5,373	$ 5,445
Year of Origination 2023
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	344
Year of Origination 2023 | Retail
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	110
Year of Origination 2023 | Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	157
Year of Origination 2023 | Apartments
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	26
Year of Origination 2023 | Office
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	19
Year of Origination 2023 | Hotel/Motel
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	32
Year of Origination 2023 | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	0
Year of Origination 2023 | Mixed Use
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	0
Year of Origination 2023 | Total
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	344
Year of Origination 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	650	635
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	264	255
Year of Origination 2022 | Apartments
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	253	247
Year of Origination 2022 | Office
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	34	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	10	10
Year of Origination 2022 | Mixed Use
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	0	0
Year of Origination 2022 | Total
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	650	635
Year of Origination 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	701	777
Year of Origination 2021 | Retail
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	36	37
Year of Origination 2021 | Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	151	168
Year of Origination 2021 | Apartments
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	363	420
Year of Origination 2021 | Office
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	124	125
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	9
Year of Origination 2021 | Total
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	701	777
Year of Origination 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	332	363
Year of Origination 2020 | Retail
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	57	58
Year of Origination 2020 | Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	59	61
Year of Origination 2020 | Apartments
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	73	93
Year of Origination 2020 | Office
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	143	151
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
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	332	363
Year of Origination 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	337	350
Year of Origination 2019 | Retail
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	46	46
Year of Origination 2019 | Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	83	85
Year of Origination 2019 | Apartments
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	161	165
Year of Origination 2019 | Office
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	36	40
Year of Origination 2019 | Hotel/Motel
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	11	14
Year of Origination 2019 | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	0	0
Year of Origination 2019 | Mixed Use
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	0	0
Year of Origination 2019 | Total
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	337	350
Year of Origination 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	3,009	206
Year of Origination 2018 | Retail
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	800	37
Year of Origination 2018 | Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	768	84
Year of Origination 2018 | Apartments
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	668	56
Year of Origination 2018 | Office
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	491	12
Year of Origination 2018 | Hotel/Motel
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	67	0
Year of Origination 2018 | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	165	17
Year of Origination 2018 | Mixed Use
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	50	0
Year of Origination 2018 | Total
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	3,009	206
Year of Origination 2017 and prior
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans		3,114
Year of Origination 2017 and prior | Retail
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans		888
Year of Origination 2017 and prior | Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans		757
Year of Origination 2017 and prior | Apartments
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans		679
Year of Origination 2017 and prior | Office
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans		513
Year of Origination 2017 and prior | Hotel/Motel
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans		69
Year of Origination 2017 and prior | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans		156
Year of Origination 2017 and prior | Mixed Use
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans		52
Year of Origination 2017 and prior | Total
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans		3,114
Total | Retail
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	1,128	1,145
Total | Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	1,482	1,410
Total | Apartments
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	1,544	1,660
Total | Office
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	847	875
Total | Hotel/Motel
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	120	93
Total | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	193	201
Total | Mixed Use
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	59	61
Total | Total
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	$ 5,373	$ 5,445