v3.26.1
Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Changes in Level 3 Assets and Liabilities) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 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 $115 and $117) $ 11,318   $ 11,104  
Limited partnerships and real estate joint ventures 4,093   3,747  
Fair Value, Nonrecurring | Fair Value Inputs Level 3 Member        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Mortgage loans (net of allowance for credit losses of $115 and $117) 8   21  
Limited partnerships and real estate joint ventures 10   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 10,027 $ 6,854    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) (124) 39    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases [1] (537) (1,514)    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales [1] (130) (44)    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements [1] (182) (140)    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 6 2    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 34 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 10,074 8,222    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) (118) 40    
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 (30) (7)    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) (35) (8)    
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    
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    
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 4 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    
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 4 5    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) 0 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases [1] 0 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales [1] 0 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements [1] (1) (1)    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 0 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 0 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 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    
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    
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    
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    
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    
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    
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    
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 120 30    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) (5) 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases [1] 0 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales [1] 0 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements [1] 0 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 0 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 0 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 115 30    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) (5) 0    
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    
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    
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    
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    
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    
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    
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 (69) [2] (55) [3]    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) 0 [2] 0 [3]    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases [1] 0 [2] 0 [3]    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales [1] 0 [2] 0 [3]    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements [1] 0 [2] 0 [3]    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 0 [2] 0 [3]    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 0 [2] 0 [3]    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value (25) [2] (66) [3]    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) 0 [2] 0 [3]    
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] 44 [2] (11)    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) 44 [2] (11) [3]    
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 [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 [2] 0 [3]    
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 [2] 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 [2] 0 [3]    
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 33 11    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) (1) 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases [1] (14) 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales [1] 2 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements [1] (18) 6    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 0 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 6 2    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 20 3    
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    
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    
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    
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    
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    
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    
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    
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 [1] 0 0    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value 397 383 $ 470 $ 435
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss) 0 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases [1] (29) 7    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements [1] 72 21    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3 0 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3 0 0    
Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss) 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    
Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss) 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 (30) (24)    
Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss) 42 (3)    
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    
Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss) 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 98 88    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) 0 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases [1] (4) 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales [1] (1) (1)    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements [1] 0 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 0 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 0 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 91 87    
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    
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 (10) 0    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) (10) 1    
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    
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    
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    
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    
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 3,601 1,799    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) (42) 20    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases [1] (747) (196)    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales [1] (37) 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements [1] (691) (114)    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 0 10    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 35 6    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 3,542 1,908    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) (44) 21    
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    
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    
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    
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    
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 (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) (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 61 56    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) (1) 2    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases [1] (1) 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales [1] 0 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements [1] (1) 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 0 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 0 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 63 57    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) (1) 2    
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    
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    
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    
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    
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 3 (1)    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) 3 (1)    
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 0 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) 0 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases [1] (16) 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales [1] 0 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements [1] 0 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 0 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 0 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 16 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    
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    
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    
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    
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    
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    
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    
Mortgage Loans on Real Estate [Member] | Fair Value, Nonrecurring | Fair Value Inputs Level 3 Member        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Assets, Fair Value Adjustment (1)      
Partnership Interest | Fair Value, Nonrecurring | Fair Value Inputs Level 3 Member        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Assets, Fair Value Adjustment $ (6)      
[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.
[2] Funds withheld at interest embedded derivative assets and liabilities are presented net for purposes of the rollforward.
[3] Funds withheld at interest embedded derivative assets and liabilities are presented net for purposes of the rollforward.