Investments - Schedule of Debt-to-Value of Commercial Mortgage Loans by Property Type (Details) $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	$ 6,363	$ 6,450
% of total	100.00%	100.00%
Weighted-average debt service coverage ratio	1.94	1.92
0% - 50%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	$ 2,396	$ 2,307
% of total	38.00%	36.00%
Weighted-average debt service coverage ratio	2.50	2.38
51% - 60%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	$ 1,261	$ 1,308
% of total	20.00%	20.00%
Weighted-average debt service coverage ratio	1.87	1.87
61% - 75%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	$ 2,424	$ 2,503
% of total	38.00%	39.00%
Weighted-average debt service coverage ratio	1.54	1.60
76% - 100%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	$ 251	$ 300
% of total	4.00%	5.00%
Weighted-average debt service coverage ratio	1.05	1.37
Greater than 100%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	$ 31	$ 32
% of total	0.00%	0.00%
Weighted-average debt service coverage ratio	0.90	1.01
Retail
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	$ 2,642	$ 2,716
% of total	42.00%	42.00%
Retail | 0% - 50%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	$ 1,168	$ 1,108
Retail | 51% - 60%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	576	689
Retail | 61% - 75%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	893	917
Retail | 76% - 100%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	5	2
Retail | Greater than 100%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	0	0
Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	$ 1,454	$ 1,331
% of total	23.00%	21.00%
Industrial | 0% - 50%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	$ 615	$ 596
Industrial | 51% - 60%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	255	226
Industrial | 61% - 75%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	584	498
Industrial | 76% - 100%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	0	4
Industrial | Greater than 100%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	0	7
Office
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	$ 1,292	$ 1,391
% of total	20.00%	22.00%
Office | 0% - 50%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	$ 261	$ 269
Office | 51% - 60%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	224	220
Office | 61% - 75%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	586	639
Office | 76% - 100%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	215	263
Office | Greater than 100%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	6	0
Apartments
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	$ 514	$ 498
% of total	8.00%	7.00%
Apartments | 0% - 50%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	$ 211	$ 181
Apartments | 51% - 60%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	127	96
Apartments | 61% - 75%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	176	205
Apartments | 76% - 100%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	0	16
Apartments | Greater than 100%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	0	0
Mixed use
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	$ 323	$ 360
% of total	5.00%	6.00%
Mixed use | 0% - 50%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	$ 69	$ 70
Mixed use | 51% - 60%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	54	32
Mixed use | 61% - 75%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	148	218
Mixed use | 76% - 100%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	27	15
Mixed use | Greater than 100%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	25	25
Other
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	$ 138	$ 154
% of total	2.00%	2.00%
Other | 0% - 50%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	$ 72	$ 83
Other | 51% - 60%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	25	45
Other | 61% - 75%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	37	26
Other | 76% - 100%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	4	0
Other | Greater than 100%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	$ 0	$ 0