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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, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule of Investments [Line Items]
Allowance for expected credit loss	$ (66)	$ (42)	$ (31)	$ (39)
Loans, net	5,336	4,554
Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	2,550	2,416
Allowance for expected credit loss	(12)	(10)	$ (6)	$ (2)
Loans, net	$ 2,538	$ 2,406
% of Total	100.00%	100.00%
East North Central | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 151	$ 151
% of Total	6.00%	6.00%
East South Central | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 75	$ 76
% of Total	3.00%	3.00%
Middle Atlantic | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 354	$ 326
% of Total	14.00%	13.00%
Mountain | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 352	$ 355
% of Total	14.00%	15.00%
New England | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 168	$ 158
% of Total	6.00%	7.00%
Pacific | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 766	$ 708
% of Total	30.00%	28.00%
South Atlantic | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 563	$ 521
% of Total	22.00%	22.00%
West North Central | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 4	$ 4
% of Total	0.00%	1.00%
West South Central | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 117	$ 117
% of Total	5.00%	5.00%
Hotel | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 18	$ 18
% of Total	1.00%	1.00%
Industrial | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 616	$ 520
% of Total	24.00%	22.00%
Mixed Use | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 11	$ 12
% of Total	0.00%	1.00%
Multifamily | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 1,012	$ 1,013
% of Total	40.00%	42.00%
Office | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 316	$ 330
% of Total	13.00%	14.00%
Retail | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 102	$ 105
% of Total	4.00%	4.00%
Student Housing | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 83	$ 83
% of Total	3.00%	3.00%
Other | Commercial Mortgage
Schedule of Investments [Line Items]
Amortized Cost	$ 392	$ 335
% of Total	15.00%	13.00%

X

- Definition

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

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Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

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