v3.26.1
Fair Values of Assets and Liabilities - Non-Recurring Basis (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
VIEs, Not Primary Beneficiary | Affordable Housing Partnerships | Nonrecurring Basis | Level 3    
Assets and liabilities measured at fair value    
Investment balance $ 11 $ 17