Investments - Changes in Allowance for Credit Losses on AFS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance as of beginning-of-year	$ 19	$ 22	$ 19
Additions from purchases of PCD debt securities	0	0	0
Additions for securities for which credit losses were not previously recognized	25	26	8
Additions (reductions) for securities for which credit losses were previously recognized	17	(5)	9
Reductions for securities disposed		(2)	(2)
Reductions for securities charged off	(15)	(22)	(12)
Balance as of end-of-period	46	19	22
Accrued interest receivable on fixed maturity AFS securities	876	908	1,100
Corporate bonds
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance as of beginning-of-year	8	9	17
Additions from purchases of PCD debt securities	0	0	0
Additions for securities for which credit losses were not previously recognized	10	25	4
Additions (reductions) for securities for which credit losses were previously recognized	11	(2)	2
Reductions for securities disposed		(2)	(2)
Reductions for securities charged off	(15)	(22)	(12)
Balance as of end-of-period	14	8	9
RMBS
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance as of beginning-of-year	6	7	1
Additions from purchases of PCD debt securities	0	0	0
Additions for securities for which credit losses were not previously recognized	0	1	3
Additions (reductions) for securities for which credit losses were previously recognized	1	(2)	3
Reductions for securities disposed		0	0
Reductions for securities charged off	0	0	0
Balance as of end-of-period	7	6	7
ABS
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance as of beginning-of-year	4	5	1
Additions from purchases of PCD debt securities	0	0	0
Additions for securities for which credit losses were not previously recognized	15	0	0
Additions (reductions) for securities for which credit losses were previously recognized	5	(1)	4
Reductions for securities disposed		0	0
Reductions for securities charged off	0	0	0
Balance as of end-of-period	24	4	5
Hybrids
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance as of beginning-of-year	1	1	0
Additions from purchases of PCD debt securities	0	0	0
Additions for securities for which credit losses were not previously recognized	0	0	1
Additions (reductions) for securities for which credit losses were previously recognized	0	0	0
Reductions for securities disposed		0	0
Reductions for securities charged off	0	0	0
Balance as of end-of-period	$ 1	$ 1	$ 1