Investments (excluding Consolidated Investment Entities) - Loans by U.S. Region (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Year of Origination 2024 [Member] | Pacific
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	$ 58
Year of Origination 2024 [Member] | South Atlantic
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	80
Year of Origination 2024 [Member] | Middle Atlantic
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	41
Year of Origination 2024 [Member] | West South Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	57
Year of Origination 2024 [Member] | Mountain
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	20
Year of Origination 2024 [Member] | East North Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	9
Year of Origination 2024 [Member] | New England
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	7
Year of Origination 2024 [Member] | West North Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	3
Year of Origination 2024 [Member] | East South Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	9
Year of Origination 2024 [Member] | Total Segment
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	284
Year of Origination 2023 | Pacific
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	49	$ 69
Year of Origination 2023 | South Atlantic
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	85	77
Year of Origination 2023 | Middle Atlantic
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	12	12
Year of Origination 2023 | West South Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	101	101
Year of Origination 2023 | Mountain
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	39	39
Year of Origination 2023 | East North Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	39	42
Year of Origination 2023 | New England
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	3	3
Year of Origination 2023 | West North Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	26	26
Year of Origination 2023 | East South Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	3	3
Year of Origination 2023 | Total Segment
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	357	372
Year of Origination 2022 | Pacific
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	140	140
Year of Origination 2022 | South Atlantic
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	122	132
Year of Origination 2022 | Middle Atlantic
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	49	47
Year of Origination 2022 | West South Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	98	100
Year of Origination 2022 | Mountain
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	89	113
Year of Origination 2022 | East North Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	92	93
Year of Origination 2022 | New England
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	5	5
Year of Origination 2022 | West North Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	1	1
Year of Origination 2022 | East South Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	20	20
Year of Origination 2022 | Total Segment
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	616	651
Year of Origination 2021 | Pacific
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	95	96
Year of Origination 2021 | South Atlantic
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	51	63
Year of Origination 2021 | Middle Atlantic
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	113	124
Year of Origination 2021 | West South Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	93	148
Year of Origination 2021 | Mountain
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	96	111
Year of Origination 2021 | East North Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	47	75
Year of Origination 2021 | New England
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	9	9
Year of Origination 2021 | West North Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	15	40
Year of Origination 2021 | East South Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	0	1
Year of Origination 2021 | Total Segment
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	519	667
Year of Origination 2020 | Pacific
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	61	63
Year of Origination 2020 | South Atlantic
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	118	155
Year of Origination 2020 | Middle Atlantic
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	17	17
Year of Origination 2020 | West South Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	10	10
Year of Origination 2020 | Mountain
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	12	12
Year of Origination 2020 | East North Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	15	26
Year of Origination 2020 | New England
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	0	0
Year of Origination 2020 | West North Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	7	7
Year of Origination 2020 | East South Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	15	16
Year of Origination 2020 | Total Segment
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	255	306
Year of Origination 2019 | Pacific
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	707	53
Year of Origination 2019 | South Atlantic
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	632	100
Year of Origination 2019 | Middle Atlantic
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	619	10
Year of Origination 2019 | West South Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	176	74
Year of Origination 2019 | Mountain
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	211	45
Year of Origination 2019 | East North Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	134	4
Year of Origination 2019 | New England
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	51	14
Year of Origination 2019 | West North Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	109	13
Year of Origination 2019 | East South Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	29	21
Year of Origination 2019 | Total Segment
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	2,668	334
Year of Origination 2018 | Pacific
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans		734
Year of Origination 2018 | South Atlantic
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans		605
Year of Origination 2018 | Middle Atlantic
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans		765
Year of Origination 2018 | West South Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans		189
Year of Origination 2018 | Mountain
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans		214
Year of Origination 2018 | East North Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans		171
Year of Origination 2018 | New England
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans		47
Year of Origination 2018 | West North Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans		144
Year of Origination 2018 | East South Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans		19
Year of Origination 2018 | Total Segment
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans		2,888
Total Segment | Pacific
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	1,110	1,155
Total Segment | South Atlantic
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	1,088	1,132
Total Segment | Middle Atlantic
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	851	975
Total Segment | West South Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	535	622
Total Segment | Mountain
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	467	534
Total Segment | East North Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	336	411
Total Segment | New England
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	75	78
Total Segment | West North Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	161	231
Total Segment | East South Central
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	76	80
Total Segment | Total Segment
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial mortgage loans	$ 4,699	$ 5,218