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Investments - Schedule of Commercial Mortgage Loan, Gross of Valuation Allowance, By Property Type and Region (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Jun. 01, 2020
Schedule of Investments [Line Items]
Allowance for expected credit loss	$ (42)	$ (31)	$ (39)	$ 0
Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	2,416	2,174
Allowance for expected credit loss	(10)	(6)	$ (2)	$ 0
Loans, net	$ 2,406	$ 2,168
% of Total	100.00%	100.00%
Commercial Mortgage | Greater than 1.25
Schedule of Investments [Line Items]
Amortized Cost		$ 2,132
Commercial Mortgage | Greater than 1.00 but less than 1.25
Schedule of Investments [Line Items]
Amortized Cost		33
Commercial Mortgage | Greater than 1.00
Schedule of Investments [Line Items]
Amortized Cost		9
East North Central | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 151	$ 137
% of Total	6.00%	6.00%
East South Central | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 76	$ 79
% of Total	3.00%	4.00%
Middle Atlantic | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 326	$ 293
% of Total	13.00%	13.00%
Mountain | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 355	$ 236
% of Total	15.00%	11.00%
New England | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 158	$ 149
% of Total	7.00%	7.00%
Pacific | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 708	$ 649
% of Total	28.00%	30.00%
South Atlantic | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 521	$ 459
% of Total	22.00%	21.00%
West North Central | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 4	$ 12
% of Total	1.00%	1.00%
West South Central | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 117	$ 160
% of Total	5.00%	7.00%
Hotel | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 18	$ 19
% of Total	1.00%	1.00%
Industrial | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 520	$ 497
% of Total	22.00%	23.00%
Mixed Use | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 12	$ 13
% of Total	1.00%	1.00%
Multifamily | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 1,013	$ 894
% of Total	42.00%	41.00%
Office | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 330	$ 343
% of Total	14.00%	16.00%
Retail | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 105	$ 121
% of Total	4.00%	6.00%
Student Housing | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 83	$ 83
% of Total	3.00%	4.00%
Other | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 335	$ 204
% of Total	13.00%	8.00%

X

- Definition

Percentage, before allowance for credit loss, of financing receivable to total financing receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (c)

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Topic 326
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