Reinsurance - Schedule of Assets in Support of Reserves (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Ceded Credit Risk [Line Items]
Fixed maturity AFS securities	$ 90,273	$ 87,586
Mortgage loans on real estate	23,277	22,338
Derivative investments	11,381	9,945
Accrued investment income	1,070	1,013
LPINE
Ceded Credit Risk [Line Items]
Fixed maturity AFS securities	11,676	11,272
Mortgage loans on real estate	2,280	2,115
Derivative investments	270	218
Accrued investment income	126	118
Total	$ 14,352	$ 13,723