Investments - Changes in Allowance for Credit Losses on AFS (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance as of beginning-of-period	$ 21	$ 39	$ 19	$ 22
Additions from purchases of PCD debt securities	0	0	0	0
Additions for securities for which credit losses were not previously recognized	16	2	17	21
Additions (reductions) for securities for which credit losses were previously recognized	8	(3)	11	(4)
Reductions for disposed securities	(1)		(3)	(1)
Reductions for securities charged-off	(5)	(13)	(5)	(13)
Balance as of end-of-period	39	25	39	25
Accrued interest receivable on fixed maturity AFS securities			906	1,100
Corporate bonds
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance as of beginning-of-period	10	27	8	9
Additions from purchases of PCD debt securities	0	0	0	0
Additions for securities for which credit losses were not previously recognized	1	2	2	21
Additions (reductions) for securities for which credit losses were previously recognized	8	(3)	11	(3)
Reductions for disposed securities	(1)		(3)	(1)
Reductions for securities charged-off	(5)	(13)	(5)	(13)
Balance as of end-of-period	13	13	13	13
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	4	5	4	5
Additions from purchases of PCD debt securities	0	0	0	0
Additions for securities for which credit losses were not previously recognized	15	0	15	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	19	5	19	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