Investments - Changes in Allowance for Credit Losses on AFS (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance as of beginning-of-period	$ 74	$ 21	$ 46	$ 19
Additions from purchases of PCD debt securities	0	0	0	0
Additions for securities for which credit losses were not previously recognized	17	16	33	17
Additions (reductions) for securities for which credit losses were previously recognized	2	8	14	11
Reductions for disposed securities		(1)		(3)
Reductions for securities charged off	(8)	(5)	(8)	(5)
Balance as of end-of-period	85	39	85	39
Accrued interest receivable on fixed maturity AFS securities			886	906
Corporate bonds
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance as of beginning-of-period	23	10	14	8
Additions from purchases of PCD debt securities	0	0	0	0
Additions for securities for which credit losses were not previously recognized	17	1	25	2
Additions (reductions) for securities for which credit losses were previously recognized	4	8	5	11
Reductions for disposed securities		(1)		(3)
Reductions for securities charged off	(8)	(5)	(8)	(5)
Balance as of end-of-period	36	13	36	13
RMBS
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance as of beginning-of-period	6	6	7	6
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	(1)	0	(2)	0
Reductions for disposed securities		0		0
Reductions for securities charged off	0	0	0	0
Balance as of end-of-period	5	6	5	6
ABS
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance as of beginning-of-period	44	4	24	4
Additions from purchases of PCD debt securities	0	0	0	0
Additions for securities for which credit losses were not previously recognized	0	15	8	15
Additions (reductions) for securities for which credit losses were previously recognized	(1)	0	11	0
Reductions for disposed securities		0		0
Reductions for securities charged off	0	0	0	0
Balance as of end-of-period	43	19	43	19
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