v3.25.4
Derivatives - Schedule of Notional Amount and Fair Value of Derivative Instruments (Details) - USD ($)
Dec. 31, 2025
Dec. 31, 2024
Derivatives, Fair Value [Line Items]    
Assets, gross $ 9,190,000,000 $ 8,154,000,000
Assets 6,425,000,000 4,504,000,000
Liabilities, gross 5,742,000,000 3,556,000,000
Liabilities $ 20,641,000,000 $ 14,802,000,000
Derivative liability, statement of financial position Other liabilities Other liabilities
Derivatives designated as hedges    
Derivatives, Fair Value [Line Items]    
Assets, gross $ 856,000,000 $ 1,335,000,000
Liabilities, gross 1,174,000,000 1,008,000,000
Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Assets, subtotal 5,569,000,000 3,169,000,000
Liabilities 19,467,000,000 13,794,000,000
Swaps | Derivatives designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 26,437,000,000 15,669,000,000
Assets, gross 560,000,000 938,000,000
Liabilities, gross 868,000,000 211,000,000
Swaps | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 19,248,000,000 14,908,000,000
Assets, gross 230,000,000 600,000,000
Liabilities, gross 744,000,000 199,000,000
Forwards | Derivatives designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 2,302,000,000 3,139,000,000
Assets, gross 81,000,000 331,000,000
Liabilities, gross 34,000,000 5,000,000
Forwards | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 47,486,000,000 39,598,000,000
Assets, gross 857,000,000 1,054,000,000
Liabilities, gross 3,356,000,000 2,083,000,000
Interest rate swaps | Derivatives designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 4,347,000,000 4,506,000,000
Assets, gross 86,000,000 0
Liabilities, gross 242,000,000 654,000,000
Forwards on net investments | Derivatives designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 234,000,000 218,000,000
Assets, gross 0 11,000,000
Liabilities, gross 0 0
Interest rate swaps and forwards and other swaps | Derivatives designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 31,252,000,000 24,885,000,000
Assets, gross 129,000,000 55,000,000
Liabilities, gross 30,000,000 138,000,000
Interest rate swaps and forwards and other swaps | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 14,606,000,000 3,255,000,000
Assets, gross 72,000,000 67,000,000
Liabilities, gross 295,000,000 124,000,000
Equity options | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 97,259,000,000 85,452,000,000
Assets, gross 6,905,000,000 5,002,000,000
Liabilities, gross 170,000,000 126,000,000
Futures | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 890,000,000 37,000,000
Assets, gross 192,000,000 93,000,000
Liabilities, gross 1,000,000 11,000,000
Other swaps | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 2,845,000,000 2,644,000,000
Assets, gross 78,000,000 3,000,000
Liabilities, gross 2,000,000 5,000,000
Funds withheld, including related parties | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Assets, netting (2,765,000,000) (3,650,000,000)
Liabilities, netting 150,000,000 4,000,000
Interest sensitive contract liabilities | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Assets, netting 0 0
Liabilities, netting $ 14,749,000,000 $ 11,242,000,000