v3.26.1
Fair Value Measurements - Schedule of Carrying Amount and Fair Value by Hierarchy of Certain Financial Instruments Not Reported at Fair Value (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Assets    
Mortgage loans $ 10,248 $ 9,887
Policy loans 875 889
FHLBI capital stock 119 119
Liabilities    
Annuity reserves 40,683 39,059
Guaranteed investment contracts and funding agreements 11,141 11,021
Funds withheld payable under reinsurance treaties 12,532 12,989
Long-term debt 2,027 2,030
Securities Loaned 54 35
Repurchase agreements 451 1,001
Separate account liabilities 223,452 236,496
Fair Value    
Assets    
Mortgage loans 9,992 9,624
Policy loans 875 889
FHLBI capital stock 119 119
Liabilities    
Annuity reserves 38,366 38,552
Guaranteed investment contracts and funding agreements 10,933 11,077
Funds withheld payable under reinsurance treaties 12,532 12,989
Long-term debt 1,831 1,877
Securities Loaned 54 35
Repurchase agreements 451 1,001
Separate account liabilities 223,452 236,496
Fair Value | Level 1    
Assets    
Mortgage loans 0 0
Policy loans 0 0
FHLBI capital stock 119 119
Liabilities    
Annuity reserves 0 0
Guaranteed investment contracts and funding agreements 0 0
Funds withheld payable under reinsurance treaties 0 0
Long-term debt 0 0
Securities Loaned 0 0
Repurchase agreements 0 0
Separate account liabilities 0 0
Fair Value | Level 2    
Assets    
Mortgage loans 0 0
Policy loans 0 0
FHLBI capital stock 0 0
Liabilities    
Annuity reserves 0 0
Guaranteed investment contracts and funding agreements 0 0
Funds withheld payable under reinsurance treaties 0 0
Long-term debt 1,831 1,877
Securities Loaned 54 35
Repurchase agreements 451 1,001
Separate account liabilities 223,452 236,496
Fair Value | Level 3    
Assets    
Mortgage loans 9,992 9,624
Policy loans 875 889
FHLBI capital stock 0 0
Liabilities    
Annuity reserves 38,366 38,552
Guaranteed investment contracts and funding agreements 10,933 11,077
Funds withheld payable under reinsurance treaties 12,532 12,989
Long-term debt 0 0
Securities Loaned 0 0
Repurchase agreements 0 0
Separate account liabilities $ 0 $ 0