Investments - Changes in Allowance for Credit Losses on AFS (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance as of beginning-of-period	$ 39	$ 25	$ 19	$ 21
Additions from purchases of PCD debt securities	0	0	0	0
Additions for securities for which credit losses were not previously recognized	7	1	23	21
Additions (reductions) for securities for which credit losses were previously recognized	7	0	16	(3)
Reductions for disposed securities	0		0	(1)
Reductions for securities charged-off	(6)	(5)	(11)	(17)
Balance as of end-of-period	47	21	47	21
Accrued investment income on fixed maturity AFS securities			812	1,200
Corporate bonds
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance as of beginning-of-period	13	13	8	9
Additions from purchases of PCD debt securities	0	0	0	0
Additions for securities for which credit losses were not previously recognized	6	1	8	21
Additions (reductions) for securities for which credit losses were previously recognized	4	0	12	(3)
Reductions for disposed securities	0		0	(1)
Reductions for securities charged-off	(6)	(5)	(11)	(17)
Balance as of end-of-period	17	9	17	9
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	0	0	(1)
Reductions for disposed securities	0		0	0
Reductions for securities charged-off	0	0	0	0
Balance as of end-of-period	6	6	6	6
ABS
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance as of beginning-of-period	19	5	4	4
Additions from purchases of PCD debt securities	0	0	0	0
Additions for securities for which credit losses were not previously recognized	1	0	15	0
Additions (reductions) for securities for which credit losses were previously recognized	3	0	4	1
Reductions for disposed securities	0		0	0
Reductions for securities charged-off	0	0	0	0
Balance as of end-of-period	23	5	23	5
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
Reductions for securities charged-off	0	0	0	0
Balance as of end-of-period	$ 1	$ 1	$ 1	$ 1