Reinsurance - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Maximum amount of individual ordinary life insurance normally retained by us on any one individual life policy	$ 5
Total reinsurance recoverable	16,919	$ 16,925
Reinsurance recoveries recognized as a reduction of benefits and other changes in reserves	2,780	2,812	$ 2,702
Reinsurance recoverables, amount past due (less than as of December 31, 2024)	17,860	17,616
Reinsurance loss on uncollectible accounts in period amount	0	0	69
Reinsurance recoverable allowance for credit loss	23	24	29	$ 63
Gain (loss) on reinsurance transaction			34
Financial Asset, Past Due
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Reinsurance recoverables, amount past due (less than as of December 31, 2024)	0	1
U.S. Life Insurance Subsidiaries | Total fixed maturity securities
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Assets pledged as collateral	8,670	8,337
U.S. Life Insurance Subsidiaries | Commercial Mortgage Loan
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Assets pledged as collateral	329	413
U.S. Life Insurance Subsidiaries | Cash
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Cash	32	33
Enact Mortgage Insurance Corporation | Traditional Excess Of Loss Reinsurance on 2025 New Insurance Written
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Reinsurance coverage	225
Enact Mortgage Insurance Corporation | Traditional Excess Of Loss Reinsurance on 2026 New Insurance Written
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Reinsurance coverage	260
Enact Mortgage Insurance Corporation | Traditional Excess of Loss Reinsurance on 2027 New Insurance Written
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Reinsurance coverage	$ 170
Enact Mortgage Insurance Corporation | Traditional Excess of Loss Reinsurance on 2024 New Insurance Written
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Reinsurance coverage		270
Enact Mortgage Insurance Corporation | Traditional Excess of Loss Coverage On Second Half 2023 New Insurance Written
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Reinsurance coverage		$ 90
Enact Mortgage Insurance Corporation | Quota Share Reinsurance on 2027 New Insurance Written
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Reinsurance percentage	33.75%
Enact Mortgage Insurance Corporation | Quota Share Reinsurance on 2024 New Insurance Written
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Reinsurance percentage		21.225%
Enact Mortgage Insurance Corporation | Quota Share Reinsurance on 2025 New Insurance Written
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Reinsurance percentage		27.15%
Enact Mortgage Insurance Corporation | Quota Share Reinsurance on 2026 New Insurance Written
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Reinsurance percentage		27.00%
Enact Mortgage Insurance Corporation | Reinsurance Activities
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Assets pledged as collateral	$ 336	$ 142
Scottish Re Group Limited
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Reinsurance recoverable credit loss			33
Reinsurance loss on uncollectible accounts in period amount			69
Reinsurance recoverable allowance for credit loss			36
Ceded premiums payable			$ 33
Union Fidelity Life Insurance Company | Ceded Credit Risk
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Minimum amount of risk-based capital General Electric Company agreed to maintain in UFLIC	150.00%
Total reinsurance recoverable	$ 12,592	$ 12,773