Investments - Allowance for Credit Losses Rollforward (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Debt Securities, Available-for-sale, Allowance for Credit Loss, Beginning Balance	$ 488	$ 111	$ 123	$ 104
Debt Securities, Available-for-sale, Allowance for Credit Loss, Not Previously Recorded	43	6	222	15
Debt Securities, Available-for-sale, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase	1	4	1	6
Debt Securities, Available-for-sale, Allowance for Credit Loss, Securities Sold	(9)	(3)	(17)	(9)
Debt Securities, Available-for-sale, Allowance for Credit Loss, Not to Sell before Recovery, Credit Loss, Previously Recorded, Expense (Reversal)	106	(9)	112	(7)
Consolidated Entity, excluding Affiliated Entity
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Debt Securities, Available-for-sale, Allowance for Credit Loss, Beginning Balance	468	111	123	103
Debt Securities, Available-for-sale, Allowance for Credit Loss, Not Previously Recorded	42	4	201	13
Debt Securities, Available-for-sale, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase	1	4	1	6
Debt Securities, Available-for-sale, Allowance for Credit Loss, Securities Sold	(9)	(3)	(17)	(8)
Debt Securities, Available-for-sale, Allowance for Credit Loss, Not to Sell before Recovery, Credit Loss, Previously Recorded, Expense (Reversal)	107	(9)	113	(7)
Related Party
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Debt Securities, Available-for-sale, Allowance for Credit Loss, Beginning Balance	20		0
Debt Securities, Available-for-sale, Allowance for Credit Loss, Not Previously Recorded	1		21
Debt Securities, Available-for-sale, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase	0		0
Debt Securities, Available-for-sale, Allowance for Credit Loss, Securities Sold	0		0
Debt Securities, Available-for-sale, Allowance for Credit Loss, Not to Sell before Recovery, Credit Loss, Previously Recorded, Expense (Reversal)	(1)		(1)
U.S. government and agencies | Consolidated Entity, excluding Affiliated Entity
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Debt Securities, Available-for-sale, Allowance for Credit Loss, Beginning Balance			0
U.S. state, municipal and political subdivisions | Consolidated Entity, excluding Affiliated Entity
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Debt Securities, Available-for-sale, Allowance for Credit Loss, Beginning Balance			0
Foreign governments | Consolidated Entity, excluding Affiliated Entity
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Debt Securities, Available-for-sale, Allowance for Credit Loss, Beginning Balance	66		0
Debt Securities, Available-for-sale, Allowance for Credit Loss, Not Previously Recorded	0		66
Debt Securities, Available-for-sale, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase	0		0
Debt Securities, Available-for-sale, Allowance for Credit Loss, Securities Sold	0		0
Debt Securities, Available-for-sale, Allowance for Credit Loss, Not to Sell before Recovery, Credit Loss, Previously Recorded, Expense (Reversal)	(5)		(5)
Corporate | Consolidated Entity, excluding Affiliated Entity
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Debt Securities, Available-for-sale, Allowance for Credit Loss, Beginning Balance	55	8	0	6
Debt Securities, Available-for-sale, Allowance for Credit Loss, Not Previously Recorded	6	1	61	3
Debt Securities, Available-for-sale, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase	0	0	0	0
Debt Securities, Available-for-sale, Allowance for Credit Loss, Securities Sold	0	0	0	(2)
Debt Securities, Available-for-sale, Allowance for Credit Loss, Not to Sell before Recovery, Credit Loss, Previously Recorded, Expense (Reversal)	9	(4)	9	(2)
Corporate | Related Party
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Debt Securities, Available-for-sale, Allowance for Credit Loss, Beginning Balance			0
CLO | Consolidated Entity, excluding Affiliated Entity
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Debt Securities, Available-for-sale, Allowance for Credit Loss, Beginning Balance	18	0	0	1
Debt Securities, Available-for-sale, Allowance for Credit Loss, Not Previously Recorded	4	3	22	3
Debt Securities, Available-for-sale, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase	0	0	0	0
Debt Securities, Available-for-sale, Allowance for Credit Loss, Securities Sold	0	0	0	0
Debt Securities, Available-for-sale, Allowance for Credit Loss, Not to Sell before Recovery, Credit Loss, Previously Recorded, Expense (Reversal)	85	0	85	(1)
CLO | Related Party
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Debt Securities, Available-for-sale, Allowance for Credit Loss, Beginning Balance	3	0	0	1
Debt Securities, Available-for-sale, Allowance for Credit Loss, Not Previously Recorded	0	2	3	2
Debt Securities, Available-for-sale, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase	0	0	0	0
Debt Securities, Available-for-sale, Allowance for Credit Loss, Securities Sold	0	0	0	(1)
Debt Securities, Available-for-sale, Allowance for Credit Loss, Not to Sell before Recovery, Credit Loss, Previously Recorded, Expense (Reversal)	16	0	16	0
ABS | Consolidated Entity, excluding Affiliated Entity
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Debt Securities, Available-for-sale, Allowance for Credit Loss, Beginning Balance	11	11	17	6
Debt Securities, Available-for-sale, Allowance for Credit Loss, Not Previously Recorded	4	0	9	5
Debt Securities, Available-for-sale, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase	0	0	0	0
Debt Securities, Available-for-sale, Allowance for Credit Loss, Securities Sold	0	0	0	0
Debt Securities, Available-for-sale, Allowance for Credit Loss, Not to Sell before Recovery, Credit Loss, Previously Recorded, Expense (Reversal)	(1)	(1)	0	(1)
ABS | Related Party
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Debt Securities, Available-for-sale, Allowance for Credit Loss, Beginning Balance	17		0
Debt Securities, Available-for-sale, Allowance for Credit Loss, Not Previously Recorded	1		18
Debt Securities, Available-for-sale, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase	0		0
Debt Securities, Available-for-sale, Allowance for Credit Loss, Securities Sold	0		0
Debt Securities, Available-for-sale, Allowance for Credit Loss, Not to Sell before Recovery, Credit Loss, Previously Recorded, Expense (Reversal)	(17)		(17)
CMBS | Consolidated Entity, excluding Affiliated Entity
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Debt Securities, Available-for-sale, Allowance for Credit Loss, Beginning Balance	6	14	3	10
Debt Securities, Available-for-sale, Allowance for Credit Loss, Not Previously Recorded	8	0	14	2
Debt Securities, Available-for-sale, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase	0	0	0	0
Debt Securities, Available-for-sale, Allowance for Credit Loss, Securities Sold	0	0	0	0
Debt Securities, Available-for-sale, Allowance for Credit Loss, Not to Sell before Recovery, Credit Loss, Previously Recorded, Expense (Reversal)	(5)	(8)	(5)	(6)
RMBS | Consolidated Entity, excluding Affiliated Entity
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Debt Securities, Available-for-sale, Allowance for Credit Loss, Beginning Balance	312	78	103	80
Debt Securities, Available-for-sale, Allowance for Credit Loss, Not Previously Recorded	20	0	29	0
Debt Securities, Available-for-sale, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase	1	4	1	6
Debt Securities, Available-for-sale, Allowance for Credit Loss, Securities Sold	(9)	(3)	(17)	(6)
Debt Securities, Available-for-sale, Allowance for Credit Loss, Not to Sell before Recovery, Credit Loss, Previously Recorded, Expense (Reversal)	$ 24	$ 4	$ 29	$ 3