Investments - Residential Mortgage Loans by Year of Origination (Details) - Residential - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	$ 394	$ 1,654
Year two	1,821	1,840
Year three	1,725	461
Year four	440	458
Year five	441	395
Year six and prior	583	206
Total	5,404	5,014
Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	393	1,650
Year two	1,810	1,776
Year three	1,651	440
Year four	419	425
Year five	406	381
Year six and prior	553	194
Total	5,232	4,866
Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	1	4
Year two	11	64
Year three	74	21
Year four	21	33
Year five	35	14
Year six and prior	30	12
Total	$ 172	$ 148