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Investments - Schedule of Commercial Mortgage Loan Investment (Details) - USD ($) $ in Millions	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023
Schedule of Investments [Line Items]
Allowance for expected credit loss	$ (75)	$ (73)	$ (70)	$ (64)	$ (67)	$ (66)
Total CMLs, net of valuation allowance	6,940		5,926
Commercial Mortgage
Schedule of Investments [Line Items]
Total CMLs, gross of valuation allowance	3,085		2,722
Allowance for expected credit loss	(17)	$ (17)	(17)	$ (14)	$ (13)	$ (12)
Total CMLs, net of valuation allowance	$ 3,068		$ 2,705
% of Total	100.00%		100.00%
East North Central | Commercial Mortgage
Schedule of Investments [Line Items]
Total CMLs, gross of valuation allowance	$ 99		$ 98
% of Total	3.00%		4.00%
East South Central | Commercial Mortgage
Schedule of Investments [Line Items]
Total CMLs, gross of valuation allowance	$ 75		$ 75
% of Total	2.00%		3.00%
Middle Atlantic | Commercial Mortgage
Schedule of Investments [Line Items]
Total CMLs, gross of valuation allowance	$ 348		$ 354
% of Total	11.00%		13.00%
Mountain | Commercial Mortgage
Schedule of Investments [Line Items]
Total CMLs, gross of valuation allowance	$ 408		$ 409
% of Total	13.00%		15.00%
New England | Commercial Mortgage
Schedule of Investments [Line Items]
Total CMLs, gross of valuation allowance	$ 174		$ 164
% of Total	6.00%		6.00%
Pacific | Commercial Mortgage
Schedule of Investments [Line Items]
Total CMLs, gross of valuation allowance	$ 726		$ 706
% of Total	24.00%		26.00%
South Atlantic | Commercial Mortgage
Schedule of Investments [Line Items]
Total CMLs, gross of valuation allowance	$ 1,008		$ 683
% of Total	33.00%		25.00%
West North Central | Commercial Mortgage
Schedule of Investments [Line Items]
Total CMLs, gross of valuation allowance	$ 63		$ 62
% of Total	2.00%		2.00%
West South Central | Commercial Mortgage
Schedule of Investments [Line Items]
Total CMLs, gross of valuation allowance	$ 184		$ 171
% of Total	6.00%		6.00%
Hotel | Commercial Mortgage
Schedule of Investments [Line Items]
Total CMLs, gross of valuation allowance	$ 17		$ 17
% of Total	1.00%		1.00%
Industrial | Commercial Mortgage
Schedule of Investments [Line Items]
Total CMLs, gross of valuation allowance	$ 657		$ 657
% of Total	21.00%		24.00%
Mixed Use | Commercial Mortgage
Schedule of Investments [Line Items]
Total CMLs, gross of valuation allowance	$ 71		$ 11
% of Total	2.00%		0.00%
Multifamily | Commercial Mortgage
Schedule of Investments [Line Items]
Total CMLs, gross of valuation allowance	$ 1,111		$ 1,006
% of Total	36.00%		37.00%
Office | Commercial Mortgage
Schedule of Investments [Line Items]
Total CMLs, gross of valuation allowance	$ 348		$ 349
% of Total	11.00%		13.00%
Retail | Commercial Mortgage
Schedule of Investments [Line Items]
Total CMLs, gross of valuation allowance	$ 183		$ 98
% of Total	6.00%		4.00%
Student Housing | Commercial Mortgage
Schedule of Investments [Line Items]
Total CMLs, gross of valuation allowance	$ 83		$ 83
% of Total	3.00%		3.00%
Other | Commercial Mortgage
Schedule of Investments [Line Items]
Total CMLs, gross of valuation allowance	$ 615		$ 501
% of Total	20.00%		18.00%

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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