v3.25.2
Fair Value Measurements (excluding Consolidated Investment Entities) - Other Financial Instruments (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Carrying Value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fixed maturities, including securities pledged $ 29,089 $ 27,454
Equity securities 210 246
Cash and cash equivalents, short-term investments and short-term investments under securities loan agreements 2,372 2,535
Derivatives 199 303
Other investments, including securities pledged 79 74
Assets held in separate accounts 107,278 101,676
Short-term debt 447 399
Long-term debt 1,657 2,103
Carrying Value | Embedded derivatives within reinsurance    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivatives 62 55
Derivatives 32 41
Carrying Value | Stabilizer and MCGs    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivatives 13 19
Carrying Value | Derivatives    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivatives 309 332
Carrying Value | Funding agreements without fixed maturities and deferred annuities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Guaranteed benefit derivatives 34,444 31,082
Carrying Value | Funding agreements with fixed maturities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Guaranteed benefit derivatives 1,400 1,249
Carrying Value | Supplementary contracts and immediate annuities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Guaranteed benefit derivatives 537 570
Carrying Value | Mortgage loans on real estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Corporate loans 5,531 4,699
Carrying Value | Policy loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Corporate loans 331 342
Estimate of Fair Value Measurement    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fixed maturities, including securities pledged 29,089 27,454
Equity securities 210 246
Cash and cash equivalents, short-term investments and short-term investments under securities loan agreements 2,372 2,535
Derivatives 199 303
Other investments, including securities pledged 79 74
Assets held in separate accounts 107,278 101,676
Short-term debt 443 399
Long-term debt 1,612 2,023
Estimate of Fair Value Measurement | Embedded derivatives within reinsurance    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivatives 62 55
Derivatives 32 41
Estimate of Fair Value Measurement | Stabilizer and MCGs    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivatives 13 19
Estimate of Fair Value Measurement | Derivatives    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivatives 309 332
Estimate of Fair Value Measurement | Funding agreements without fixed maturities and deferred annuities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Guaranteed benefit derivatives 37,494 32,877
Estimate of Fair Value Measurement | Funding agreements with fixed maturities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Guaranteed benefit derivatives 1,405 1,257
Estimate of Fair Value Measurement | Supplementary contracts and immediate annuities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Guaranteed benefit derivatives 488 515
Estimate of Fair Value Measurement | Mortgage loans on real estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Corporate loans 5,379 4,459
Estimate of Fair Value Measurement | Policy loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Corporate loans 331 342
Assets held in separate accounts 107,278 101,676
Derivatives $ 309 $ 332