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Investments - Credit Quality of RMLs (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Allowance for expected credit loss	$ (66)	$ (42)	$ (31)	$ (39)
Loans, net	5,336	4,554
Residential Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Amortized Cost	2,852	2,180
Allowance for expected credit loss	(54)	(32)	$ (25)	$ (37)
Loans, net	$ 2,798	$ 2,148
% of Total	100.00%	100.00%
Allowance for expected loan loss, % of Total	0.00%	0.00%
Total residential mortgage loans, % of Total	100.00%	100.00%
Residential Mortgage | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Amortized Cost	$ 2,795	$ 2,118
% of Total	98.00%	97.00%
Residential Mortgage | Non-performing
Financing Receivable, Credit Quality Indicator [Line Items]
Amortized Cost	$ 57	$ 62
% of Total	2.00%	3.00%

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- Definition

Financing Receivable Allowance for Expected Credit Loss, Percent

+ References

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- Definition

Percentage of allowance for credit loss to total financing receivable outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
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Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

+ References

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-Name Accounting Standards Codification
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