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Investments - Schedule of Principal Geographic Distribution of Commercial Real Estate Exceeding 5% of the Mortgage Loans Portfolio and Types of Properties Collateralizing, Portfolio and Contractual Maturities (Details) $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($) loan	Dec. 31, 2024 USD ($)
Schedule of Available for Sale Securities
Mortgage loans on real estate, carrying value (as a percent)	100.00%	100.00%
Amortized cost, net	$ 879	$ 784
Mortgage loans repayment term	30 years
Mortgage loans purchase period	2 years
Mortgage loans
Schedule of Available for Sale Securities
Mortgage loans on real estate, carrying value (as a percent)	100.00%
Number of loans | loan	43
Amortized cost, net	$ 619
2026 | Mortgage loans
Schedule of Available for Sale Securities
Mortgage loans on real estate, carrying value (as a percent)	22.40%
Number of loans | loan	8
Amortized cost, net	$ 139
2027 | Mortgage loans
Schedule of Available for Sale Securities
Mortgage loans on real estate, carrying value (as a percent)	9.20%
Number of loans | loan	6
Amortized cost, net	$ 57
2028 | Mortgage loans
Schedule of Available for Sale Securities
Mortgage loans on real estate, carrying value (as a percent)	24.40%
Number of loans | loan	11
Amortized cost, net	$ 151
2029 | Mortgage loans
Schedule of Available for Sale Securities
Mortgage loans on real estate, carrying value (as a percent)	15.20%
Number of loans | loan	5
Amortized cost, net	$ 94
Thereafter | Mortgage loans
Schedule of Available for Sale Securities
Mortgage loans on real estate, carrying value (as a percent)	28.80%
Number of loans | loan	13
Amortized cost, net	$ 178
Apartment Complex
Schedule of Available for Sale Securities
Mortgage loans on real estate, carrying value (as a percent)	17.00%	24.90%
Retail
Schedule of Available for Sale Securities
Mortgage loans on real estate, carrying value (as a percent)	18.70%	21.00%
Warehouse
Schedule of Available for Sale Securities
Mortgage loans on real estate, carrying value (as a percent)	16.20%	20.90%
Office
Schedule of Available for Sale Securities
Mortgage loans on real estate, carrying value (as a percent)	7.60%	13.40%
Other
Schedule of Available for Sale Securities
Mortgage loans on real estate, carrying value (as a percent)	10.90%	12.00%
Residential
Schedule of Available for Sale Securities
Mortgage loans on real estate, carrying value (as a percent)	29.60%	7.80%
California
Schedule of Available for Sale Securities
Mortgage loans on real estate, carrying value (as a percent)	24.40%	22.90%
Texas
Schedule of Available for Sale Securities
Mortgage loans on real estate, carrying value (as a percent)	12.20%	13.80%
Virginia
Schedule of Available for Sale Securities
Mortgage loans on real estate, carrying value (as a percent)	7.30%	6.10%
Tennessee
Schedule of Available for Sale Securities
Mortgage loans on real estate, carrying value (as a percent)	7.20%	6.20%
Ohio
Schedule of Available for Sale Securities
Mortgage loans on real estate, carrying value (as a percent)	6.00%	5.40%
Florida
Schedule of Available for Sale Securities
Mortgage loans on real estate, carrying value (as a percent)	2.80%	8.50%

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