Investments - Changes in Allowance for Credit Losses on AFS (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance as of beginning-of-period	$ 111	$ 73	$ 110	$ 46
Additions from purchases of PCD debt securities	0	0	0	0
Additions for securities for which credit losses were not previously recognized	12	16	14	33
Additions (reductions) for securities for which credit losses were previously recognized	23	3	49	14
Reductions for disposed securities	(2)		(6)
Reductions for securities charged off	(6)	(7)	(29)	(8)
Balance as of end-of-period	138	85	138	85
Accrued investment income on fixed maturity AFS securities			834	776
Corporate bonds
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance as of beginning-of-period	38	23	53	14
Additions from purchases of PCD debt securities	0	0	0	0
Additions for securities for which credit losses were not previously recognized	9	16	11	25
Additions (reductions) for securities for which credit losses were previously recognized	5	4	12	5
Reductions for disposed securities	(2)		(3)
Reductions for securities charged off	(6)	(7)	(29)	(8)
Balance as of end-of-period	44	36	44	36
RMBS
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance as of beginning-of-period	6	6	6	7
Additions from purchases of PCD debt securities	0	0	0	0
Additions for securities for which credit losses were not previously recognized	0	0	0	0
Additions (reductions) for securities for which credit losses were previously recognized	0	(1)	0	(2)
Reductions for disposed securities	0		0
Reductions for securities charged off	0	0	0	0
Balance as of end-of-period	6	5	6	5
CMBS
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance as of beginning-of-period	0	0	0	0
Additions from purchases of PCD debt securities	0	0	0	0
Additions for securities for which credit losses were not previously recognized	3	0	3	0
Additions (reductions) for securities for which credit losses were previously recognized	0	0	0	0
Reductions for disposed securities	0		0
Reductions for securities charged off	0	0	0	0
Balance as of end-of-period	3	0	3	0
ABS
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance as of beginning-of-period	66	43	50	24
Additions from purchases of PCD debt securities	0	0	0	0
Additions for securities for which credit losses were not previously recognized	0	0	0	8
Additions (reductions) for securities for which credit losses were previously recognized	18	0	37	11
Reductions for disposed securities	0		(3)
Reductions for securities charged off	0	0	0	0
Balance as of end-of-period	84	43	84	43
Hybrids
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance as of beginning-of-period	1	1	1	1
Additions from purchases of PCD debt securities	0	0	0	0
Additions for securities for which credit losses were not previously recognized	0	0	0	0
Additions (reductions) for securities for which credit losses were previously recognized	0	0	0	0
Reductions for disposed securities	0		0
Reductions for securities charged off	0	0	0	0
Balance as of end-of-period	$ 1	$ 1	$ 1	$ 1