v3.26.1
Fair Value of Assets and Liabilities (Changes in Level 3 Assets and Liabilities) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Dec. 31, 2024
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Mortgage loans (net of allowance for credit losses of $127 and $117) $ 11,927   $ 11,927     $ 11,104    
Real Estate Investments, Joint Ventures 4,109   4,109     3,747    
Fair Value Inputs Level 3 Member | Fair Value, Nonrecurring                
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Mortgage loans (net of allowance for credit losses of $127 and $117) 8   8     21    
Real Estate Investments, Joint Ventures 16   16     46    
Corporate Debt Securities [Member]                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 10,074 $ 8,222 10,027 $ 6,854        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) (3) 60 (127) 99        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases (1,103) [1] (889) [1] (1,640) [1],[2] (2,403) [2]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales 345 [1] 47 [1] 475 [1],[2] 91 [2]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements (241) [1] (182) [1] (423) [1],[2] (322) [2]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 0 0 6 2        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 0 9 34 9        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 10,558 8,912 10,558 8,912        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) (6) 61 (124) 101        
Corporate Debt Securities [Member] | Income Statement Location [Axis]: us-gaap:GainLossOnInvestments                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings (33) (24) (63) (31)        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) (30) (24) (65) (32)        
Corporate Debt Securities [Member] | Income Statement Location [Axis]: us-gaap:InterestExpenseOperating                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 0 0 0        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) 0 0 0 0        
Corporate Debt Securities [Member] | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 3 3 7 7        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) 3 3 6 6        
US Government Agencies Debt Securities [Member]                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 3 4 4 5        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) 0 0 0 0        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases 0 [1] 0 [1] 0 [1],[2] 0 [2]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales 0 [1] 0 [1] 0 [1],[2] 0 [2]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements 0 [1] 0 [1] (1) [1],[2] (1) [2]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 0 0 0 0        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 0 0 0 0        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 3 4 3 4        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) 0 0 0 0        
US Government Agencies Debt Securities [Member] | Income Statement Location [Axis]: us-gaap:GainLossOnInvestments                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 0 0 0        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) 0 0 0 0        
US Government Agencies Debt Securities [Member] | Income Statement Location [Axis]: us-gaap:InterestExpenseOperating                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 0 0 0        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) 0 0 0 0        
US Government Agencies Debt Securities [Member] | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 0 0 0        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) 0 0 0 0        
Debt Security, Government, Non-US [Member]                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 115 30 120 30        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) (2) 2 (7) 2        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases (16) [1] 0 [1] (16) [1],[2] 0 [2]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales 0 [1] 0 [1] 0 [1],[2] 0 [2]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements 0 [1] 0 [1] 0 [1],[2] 0 [2]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 0 0 0 0        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 0 0 0 0        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 129 32 129 32        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) (2) 2 (7) 2        
Debt Security, Government, Non-US [Member] | Income Statement Location [Axis]: us-gaap:GainLossOnInvestments                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 0 0 0        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) 0 0 0 0        
Debt Security, Government, Non-US [Member] | Income Statement Location [Axis]: us-gaap:InterestExpenseOperating                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 0 0 0        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) 0 0 0 0        
Debt Security, Government, Non-US [Member] | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 0 0 0        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) 0 0 0 0        
Funds Withheld At Interest Embedded Derivatives [Member]                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value (25) [3] (66) [4] (69) [3] (55) [3]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) 0 [3] 0 [4] 0 [3] 0 [3]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases 0 [1],[3] 0 [1],[4] 0 [1],[3] 0 [2],[3]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales 0 [1],[3] 0 [1],[4] 0 [1],[3] 0 [2],[3]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements 0 [1],[3] 0 [1],[4] 0 [1],[3] 0 [2],[3]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 0 [3] 0 [4] 0 [3] 0 [3]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 0 [3] 0 [4] 0 [3] 0 [3]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value [3] (28) (63) [4] (28) (63) [4]        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) [3] 0 0 [4] 0 0 [4]        
Funds Withheld At Interest Embedded Derivatives [Member] | Income Statement Location [Axis]: us-gaap:GainLossOnInvestments                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings [3] (3) 3 [4] 41 (8) [4]        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) [3] (3) 3 [4] 41 (8) [4]        
Funds Withheld At Interest Embedded Derivatives [Member] | Income Statement Location [Axis]: us-gaap:InterestExpenseOperating                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings [3] 0 0 [4] 0 0 [4]        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) [3] 0 0 [4] 0 0 [4]        
Funds Withheld At Interest Embedded Derivatives [Member] | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings [3] 0 0 [4] 0 0 [4]        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) [3] 0 0 [4] 0 0 [4]        
Short-term Investments [Member]                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 20 3 33 11        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) 0 0 (1) 0        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases (9) [1] 7 [1] (23) [1] (7) [2]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales 0 [1] 0 [1] (2) [1] 0 [2]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements 0 [1] (1) [1] (18) [1] (7) [2]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 0 0 0 0        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 0 0 6 2        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 29 9 29 9        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) 0 0 0 0        
Short-term Investments [Member] | Income Statement Location [Axis]: us-gaap:GainLossOnInvestments                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 0 0 0        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) 0 0 0 0        
Short-term Investments [Member] | Income Statement Location [Axis]: us-gaap:InterestExpenseOperating                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 0 0 0        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) 0 0 0 0        
Short-term Investments [Member] | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 0 0 0        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) 0 0 0 0        
Interest Sensitive Contract Liabilities Embedded Derivatives [Member]                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Sales 0 [1] 0 [1] 0 [1] 0 [2]        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value 434 354 434 354 $ 397 $ 470 $ 383 $ 435
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss) 0 0 0 0        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases (26) [1] 4 [1] (55) [1] 11 [2]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements 68 [1] 17 [1] 140 [1] 38 [2]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3 0 0 0 0        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3 0 0 0 0        
Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss) 0 0 0 0        
Interest Sensitive Contract Liabilities Embedded Derivatives [Member] | Income Statement Location [Axis]: us-gaap:GainLossOnInvestments                
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings 0 0 0        
Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss) 0 0 0 0        
Interest Sensitive Contract Liabilities Embedded Derivatives [Member] | Income Statement Location [Axis]: us-gaap:InterestExpenseOperating                
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings 79 (8) 49 (32)        
Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss) 147 8 190 5        
Interest Sensitive Contract Liabilities Embedded Derivatives [Member] | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome                
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings 0 0 0 0        
Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss) 0 0 0 0        
Equity securities                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 91 87 98 88        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) 0 0 0 0        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases (6) [1] 0 [1] (10) [1],[2] 0 [2]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales 0 [1] 0 [1] 1 [1],[2] 1 [2]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements 0 [1] 0 [1] 0 [1],[2] 0 [2]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 0 0 0 0        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 0 0 0 0        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 94 91 94 91        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) 0 0 0 0        
Equity securities | Income Statement Location [Axis]: us-gaap:GainLossOnInvestments                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings (3) 4 (13) 4        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) (3) 4 (13) 5        
Equity securities | Income Statement Location [Axis]: us-gaap:InterestExpenseOperating                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 0 0 0        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) 0 0 0 0        
Equity securities | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 0 0 0        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) 0 0 0 0        
Structured Finance [Member]                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 3,542 1,908 3,601 1,799        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) (17) 29 (59) 49        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases (517) [1] (384) [1] (1,264) [1],[2] (580) [2]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales 29 [1] 10 [1] 66 [1],[2] 10 [2]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements (484) [1] (51) [1] (1,175) [1],[2] (165) [2]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 13 10 13 20        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 69 8 104 14        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 3,473 2,261 3,473 2,261        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) (21) 29 (65) 50        
Structured Finance [Member] | Income Statement Location [Axis]: us-gaap:GainLossOnInvestments                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 (1) 0 0        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) 0 0 0 0        
Structured Finance [Member] | Income Statement Location [Axis]: us-gaap:InterestExpenseOperating                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 0 0 0        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) 0 0 0 0        
Structured Finance [Member] | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 0 (1) 2        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) 0 0 (1) 1        
Funds withheld at interest                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 63 57 61 56        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) 0 4 (1) 6        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases 0 [1] (1) [1] (1) [1] (1) [2]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales 0 [1] 0 [1] 0 [1] 0 [2]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements (1) [1] (2) [1] (2) [1] (2) [2]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 0 0 0 0        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 0 0 0 0        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 61 60 61 60        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) 0 3 (1) 5        
Funds withheld at interest | Income Statement Location [Axis]: us-gaap:GainLossOnInvestments                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 0 0 0        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) 0 0 0 0        
Funds withheld at interest | Income Statement Location [Axis]: us-gaap:InterestExpenseOperating                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 0 0 0        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) 0 0 0 0        
Funds withheld at interest | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings (1) 0 2 (1)        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) (4) (1) (1) (2)        
Corporate Joint Venture                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 16 0 0 0        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) 0 0 0 0        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases (27) 0 (43) 0        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales 0 0 0 0        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements 0 0 0 0        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 0 0 0 0        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 0 0 0 0        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 43 0 43 0        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) 0 0 0 0        
Corporate Joint Venture | Income Statement Location [Axis]: us-gaap:GainLossOnInvestments                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 0 0 0        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) 0 0 0 0        
Corporate Joint Venture | Income Statement Location [Axis]: us-gaap:InterestExpenseOperating                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 0 0 0        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) 0 0 0 0        
Corporate Joint Venture | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 0 0 0        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) 0 $ 0 0 $ 0        
Mortgage Loans on Real Estate [Member] | Fair Value Inputs Level 3 Member | Fair Value, Nonrecurring                
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Assets, Fair Value Adjustment 0   (1)          
Partnership Interest | Fair Value Inputs Level 3 Member | Fair Value, Nonrecurring                
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Assets, Fair Value Adjustment $ (5)   $ (12)          
[1] The amount reported within purchases, sales and settlements is the purchase price (for purchases) and the sales/settlement proceeds (for sales and settlements) based upon the actual date purchased or sold/settled. Items purchased and sold/settled in the same period are excluded from the rollforward. The Company had no issuances during the period.
For the six months ended June 30, 2025:
Fixed maturity securities available-for-saleReal estate joint ventures – fair value
Funds 
withheld at interest –embedded derivatives, net (1)
Funds 
withheld at interest		Interest-sensitive contract 
liabilities – embedded derivatives
CorporateForeign govtStructured securitiesU.S. and local govtEquity securitiesShort-term investments
Fair value, beginning of period$6,854 $30 $1,799 $5 $88 $— $11 $(55)$56 $(435)
Total gains/losses (realized/unrealized)
Included in earnings, net:
Net investment income7 — 2 — — — — — (1)— 
Investment related gains (losses), net(31)— — — 4 — — (8)— — 
Interest credited— — — — — — — — — 32 
Included in other comprehensive income (loss)99 2 49 — — — — — 6 — 
Purchases (2)
2,403 — 580 — — — 7 — 1 11 
Sales (2)
(91)— (10)— (1)— — — — — 
Settlements (2)
(322)— (165)(1)— — (7)— (2)38 
Transfers into Level 32 — 20 — — — — — — — 
Transfers out of Level 3(9)— (14)— — — (2)— — — 
Fair value, end of period$8,912 $32 $2,261 $4 $91 $— $9 $(63)$60 $(354)
Total gains/losses (realized/unrealized) recorded for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Net investment income$6 $— $1 $— $— $— $— $— $(2)$— 
Investment related gains (losses), net(32)— — — 5 — — (8)— — 
Interest credited— — — — — — — — — (5)
Included in other comprehensive income (loss)101 2 50 — — — — — 5 — 
(1)Funds withheld at interest – embedded derivative assets and liabilities are presented net for purposes of the rollforward.
(2)The amount reported within purchases, sales and settlements is the purchase price (for purchases) and the sales/settlement proceeds (for sales and settlements) based upon the actual date purchased or sold/settled. Items purchased and sold/settled in the same period are excluded from the rollforward. The Company had no issuances during the period.
[2] The amount reported within purchases, sales and settlements is the purchase price (for purchases) and the sales/settlement proceeds (for sales and settlements) based upon the actual date purchased or sold/settled. Items purchased and sold/settled in the same period are excluded from the rollforward. The Company had no issuances during the period.
[3] Funds withheld at interest – embedded derivative assets and liabilities are presented net for purposes of the rollforward.
[4] Funds withheld at interest – embedded derivative assets and liabilities are presented net for purposes of the rollforward.