Investments - Changes in Allowance for Credit Losses on AFS (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance as of beginning-of-period	$ 85	$ 39	$ 46	$ 19
Additions from purchases of PCD debt securities	0	0	0	0
Additions for securities for which credit losses were not previously recognized	14	7	43	23
Additions (reductions) for securities for which credit losses were previously recognized	5	8	23	17
Reductions for disposed securities	(1)	(1)	(1)	0
Reductions for securities charged off	(6)	(5)	(14)	(11)
Balance as of end-of-period	97	48	97	48
Accrued interest receivable on fixed maturity AFS securities			920	927
Corporate bonds
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance as of beginning-of-period	36	13	14	8
Additions from purchases of PCD debt securities	0	0	0	0
Additions for securities for which credit losses were not previously recognized	14	6	31	8
Additions (reductions) for securities for which credit losses were previously recognized	5	4	17	12
Reductions for disposed securities	0	(1)	0	0
Reductions for securities charged off	(6)	(5)	(13)	(11)
Balance as of end-of-period	49	17	49	17
RMBS
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance as of beginning-of-period	5	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	1	(1)	1
Reductions for disposed securities	0	0	0	0
Reductions for securities charged off	0	0	0	0
Balance as of end-of-period	6	7	6	7
ABS
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance as of beginning-of-period	43	19	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	1	12	15
Additions (reductions) for securities for which credit losses were previously recognized	(1)	3	7	4
Reductions for disposed securities	(1)	0	(1)	0
Reductions for securities charged off	0	0	(1)	0
Balance as of end-of-period	41	23	41	23
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	0	0
Reductions for securities charged off	0	0	0	0
Balance as of end-of-period	$ 1	$ 1	$ 1	$ 1