Investments - Summarizes the Activity in the Allowance For Credit Losses (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2022
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 488	$ 311
Initial credit losses	43	222
Initial credit losses on PCD securities	1	1
Securities sold during the period	(9)	(17)
Additions (reductions) to previously impaired securities	106	112
Balance at end of period	629	629
Affiliated Entity
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	20	0
Initial credit losses	1	21
Initial credit losses on PCD securities	0	0
Securities sold during the period	0	0
Additions (reductions) to previously impaired securities	(1)	(1)
Balance at end of period	20	20
Foreign governments
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	66	0
Initial credit losses	0	66
Initial credit losses on PCD securities	0	0
Securities sold during the period	0	0
Additions (reductions) to previously impaired securities	(5)	(5)
Balance at end of period	61	61
Corporate
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	55	0
Initial credit losses	6	61
Initial credit losses on PCD securities	0	0
Securities sold during the period	0	0
Additions (reductions) to previously impaired securities	9	9
Balance at end of period	70	70
Corporate | Affiliated Entity
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Balance at end of period	0	0
CLO
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	18	0
Initial credit losses	4	22
Initial credit losses on PCD securities	0	0
Securities sold during the period	0	0
Additions (reductions) to previously impaired securities	85	85
Balance at end of period	107	107
CLO | Affiliated Entity
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	3	0
Initial credit losses	0	3
Initial credit losses on PCD securities	0	0
Securities sold during the period	0	0
Additions (reductions) to previously impaired securities	16	16
Balance at end of period	19	19
ABS
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	11	5
Initial credit losses	4	9
Initial credit losses on PCD securities	0	0
Securities sold during the period	0	0
Additions (reductions) to previously impaired securities	(1)	0
Balance at end of period	14	14
ABS | Affiliated Entity
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	17	0
Initial credit losses	1	18
Initial credit losses on PCD securities	0	0
Securities sold during the period	0	0
Additions (reductions) to previously impaired securities	(17)	(17)
Balance at end of period	1	1
CMBS
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	6	0
Initial credit losses	8	14
Initial credit losses on PCD securities	0	0
Securities sold during the period	0	0
Additions (reductions) to previously impaired securities	(5)	(5)
Balance at end of period	9	9
RMBS
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	312	306
Initial credit losses	20	29
Initial credit losses on PCD securities	1	1
Securities sold during the period	(9)	(17)
Additions (reductions) to previously impaired securities	24	29
Balance at end of period	348	348
AFS securities
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	468	311
Initial credit losses	42	201
Initial credit losses on PCD securities	1	1
Securities sold during the period	(9)	(17)
Additions (reductions) to previously impaired securities	107	113
Balance at end of period	$ 609	$ 609