Investments - Commercial Mortgage Loans by Year of Origination (Details) - Commercial $ in Millions	Mar. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Origination Year
Year one	$ 285	$ 1,631
Year two	1,626	1,361
Year three	1,357	1,819
Year four	1,810	2,296
Year five	2,284	1,162
Year six and prior	10,140	9,190
Total	17,502	17,459
LTV Less Than 65%
Origination Year
Year one	267	1,548
Year two	1,551	1,317
Year three	1,316	1,721
Year four	1,714	2,249
Year five	2,229	1,158
Year six and prior	10,013	9,056
Total	$ 17,090	$ 17,049
Debt-Service Coverage Ratio
Year one	1.63	1.73
Year two	1.73	1.77
Year three	1.75	2.11
Year four	2.06	3.49
Year five	3.21	3.33
Year six and prior	2.47	2.38
LTV 65% to 75%
Origination Year
Year one	$ 18	$ 83
Year two	74	44
Year three	39	94
Year four	88	47
Year five	46	4
Year six and prior	114	126
Total	$ 379	$ 398
Debt-Service Coverage Ratio
Year one	1.33	1.41
Year two	1.42	1.36
Year three	1.37	1.55
Year four	1.52	1.52
Year five	1.73	1.53
Year six and prior	1.56	1.58
LTV Greater Than 75%
Origination Year
Year one	$ 0	$ 0
Year two	1	0
Year three	2	4
Year four	8	0
Year five	9	0
Year six and prior	13	8
Total	$ 33	$ 12
Debt-Service Coverage Ratio
Year one	0	0
Year two	1.69	0
Year three	1.51	1.30
Year four	1.24	0
Year five	1.26	0
Year six and prior	1.13	1.30