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	1,392
Year three	1,388	1,822
Year four	1,813	2,314
Year five	2,302	1,171
Year six and prior	10,230	9,272
Total	17,644	17,602
LTV Less Than 65%
Origination Year
Year one	267	1,548
Year two	1,551	1,348
Year three	1,346	1,724
Year four	1,718	2,267
Year five	2,247	1,167
Year six and prior	10,103	9,138
Total	$ 17,232	$ 17,192
Debt-Service Coverage Ratio
Year one	1.63	1.73
Year two	1.73	1.78
Year three	1.76	2.11
Year four	2.07	3.50
Year five	3.21	3.33
Year six and prior	2.48	2.38
LTV 65% to 75%
Origination Year
Year one	$ 18	$ 83
Year two	74	44
Year three	40	94
Year four	87	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