v3.26.1
Investments - Pledged investments (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Financial Instruments Owned and Pledged as Collateral [Line Items]      
Securities collateral pledged to us $ 6,169 $ 4,405  
Amounts borrowed under repurchase and securities lending agreements 6,200 4,500  
Securities pledged under repurchase agreements 3,154 1,149  
Securities pledged under securities lending agreements 3,015 3,256  
Total carrying values of cash and securities deposited under requirements of regulatory authorities or other insurance-related arrangements 11,800 12,100  
Federal home loan bank stock 303 306  
Available for sale debt securities 6,169 4,405  
Loans 55,106 55,208  
Policyholder contract deposit 190,076 188,876 $ 176,312
Guaranteed Investment Contract      
Financial Instruments Owned and Pledged as Collateral [Line Items]      
Policyholder contract deposit 63 48  
Asset Pledged as Collateral | Federal Home Loan Bank Advances      
Financial Instruments Owned and Pledged as Collateral [Line Items]      
Available for sale debt securities 4,100 2,900  
Loans 8,200 8,500  
Asset Pledged as Collateral | Deposits      
Financial Instruments Owned and Pledged as Collateral [Line Items]      
Available for sale debt securities 119 121  
Asset Pledged as Collateral | Collateralized Reinsurance Transactions      
Financial Instruments Owned and Pledged as Collateral [Line Items]      
Available for sale debt securities 637 650  
Non-U.S. governments      
Financial Instruments Owned and Pledged as Collateral [Line Items]      
Securities pledged under repurchase agreements 30 59  
Securities pledged under securities lending agreements 41 57  
Corporate debt      
Financial Instruments Owned and Pledged as Collateral [Line Items]      
Securities pledged under repurchase agreements 3,124 1,090  
Securities pledged under securities lending agreements 2,974 3,199  
Overnight and Continuous      
Financial Instruments Owned and Pledged as Collateral [Line Items]      
Securities pledged under repurchase agreements 6 6  
Securities pledged under securities lending agreements 0 0  
Overnight and Continuous | Non-U.S. governments      
Financial Instruments Owned and Pledged as Collateral [Line Items]      
Securities pledged under repurchase agreements 0 0  
Securities pledged under securities lending agreements 0 0  
Overnight and Continuous | Corporate debt      
Financial Instruments Owned and Pledged as Collateral [Line Items]      
Securities pledged under repurchase agreements 6 6  
Securities pledged under securities lending agreements 0 0  
Up to 30 Days      
Financial Instruments Owned and Pledged as Collateral [Line Items]      
Securities pledged under repurchase agreements 0 623  
Securities pledged under securities lending agreements 1,777 3,256  
Up to 30 Days | Non-U.S. governments      
Financial Instruments Owned and Pledged as Collateral [Line Items]      
Securities pledged under repurchase agreements 0 25  
Securities pledged under securities lending agreements 25 57  
Up to 30 Days | Corporate debt      
Financial Instruments Owned and Pledged as Collateral [Line Items]      
Securities pledged under repurchase agreements 0 598  
Securities pledged under securities lending agreements 1,752 3,199  
31 - 90 Days      
Financial Instruments Owned and Pledged as Collateral [Line Items]      
Securities pledged under repurchase agreements 3,148 520  
Securities pledged under securities lending agreements 1,238 0  
31 - 90 Days | Non-U.S. governments      
Financial Instruments Owned and Pledged as Collateral [Line Items]      
Securities pledged under repurchase agreements 30 34  
Securities pledged under securities lending agreements 16 0  
31 - 90 Days | Corporate debt      
Financial Instruments Owned and Pledged as Collateral [Line Items]      
Securities pledged under repurchase agreements 3,118 486  
Securities pledged under securities lending agreements 1,222 0  
91 - 364 Days      
Financial Instruments Owned and Pledged as Collateral [Line Items]      
Securities pledged under repurchase agreements 0 0  
Securities pledged under securities lending agreements 0 0  
91 - 364 Days | Non-U.S. governments      
Financial Instruments Owned and Pledged as Collateral [Line Items]      
Securities pledged under repurchase agreements 0 0  
Securities pledged under securities lending agreements 0 0  
91 - 364 Days | Corporate debt      
Financial Instruments Owned and Pledged as Collateral [Line Items]      
Securities pledged under repurchase agreements 0 0  
Securities pledged under securities lending agreements 0 0  
365 Days or Greater      
Financial Instruments Owned and Pledged as Collateral [Line Items]      
Securities pledged under repurchase agreements 0 0  
Securities pledged under securities lending agreements 0 0  
365 Days or Greater | Non-U.S. governments      
Financial Instruments Owned and Pledged as Collateral [Line Items]      
Securities pledged under repurchase agreements 0 0  
Securities pledged under securities lending agreements 0 0  
365 Days or Greater | Corporate debt      
Financial Instruments Owned and Pledged as Collateral [Line Items]      
Securities pledged under repurchase agreements 0 0  
Securities pledged under securities lending agreements $ 0 $ 0