v3.26.1
Derivatives - Schedule of Notional Amount and Fair Value of Derivative Instruments (Details) - USD ($)
Jun. 30, 2026
Dec. 31, 2025
Derivatives, Fair Value [Line Items]    
Assets, gross $ 11,034,000,000 $ 9,190,000,000
Assets 8,283,000,000 6,425,000,000
Liabilities, gross 6,241,000,000 5,742,000,000
Liabilities $ 22,722,000,000 $ 20,641,000,000
Derivative liability, statement of financial position Other liabilities Other liabilities
Derivatives designated as hedges    
Derivatives, Fair Value [Line Items]    
Assets, gross $ 845,000,000 $ 856,000,000
Liabilities, gross 964,000,000 1,174,000,000
Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Assets, subtotal 7,438,000,000 5,569,000,000
Liabilities 21,758,000,000 19,467,000,000
Swaps | Derivatives designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 27,919,000,000 26,437,000,000
Assets, gross 658,000,000 560,000,000
Liabilities, gross 565,000,000 868,000,000
Swaps | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 29,675,000,000 19,248,000,000
Assets, gross 491,000,000 230,000,000
Liabilities, gross 543,000,000 744,000,000
Forwards | Derivatives designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 1,670,000,000 2,302,000,000
Assets, gross 98,000,000 81,000,000
Liabilities, gross 17,000,000 34,000,000
Forwards | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 40,878,000,000 47,486,000,000
Assets, gross 1,042,000,000 857,000,000
Liabilities, gross 3,700,000,000 3,356,000,000
Interest rate swaps | Derivatives designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 4,198,000,000 4,347,000,000
Assets, gross 51,000,000 86,000,000
Liabilities, gross 283,000,000 242,000,000
Forwards on net investments | Derivatives designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 220,000,000 234,000,000
Assets, gross 2,000,000 0
Liabilities, gross 0 0
Interest rate swaps and forwards and other swaps | Derivatives designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 51,484,000,000 31,252,000,000
Assets, gross 36,000,000 129,000,000
Liabilities, gross 99,000,000 30,000,000
Interest rate swaps and forwards and other swaps | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 27,800,000,000 14,606,000,000
Assets, gross 122,000,000 72,000,000
Liabilities, gross 549,000,000 295,000,000
Equity options | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 107,469,000,000 97,259,000,000
Assets, gross 8,277,000,000 6,905,000,000
Liabilities, gross 485,000,000 170,000,000
Futures | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 54,000,000 890,000,000
Assets, gross 106,000,000 192,000,000
Liabilities, gross 0 1,000,000
Other swaps | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 2,288,000,000 2,845,000,000
Assets, gross 151,000,000 78,000,000
Liabilities, gross 0 2,000,000
Funds withheld, including related parties | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Assets, netting (2,751,000,000) (2,765,000,000)
Liabilities, netting 97,000,000 150,000,000
Interest sensitive contract liabilities | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Assets, netting 0 0
Liabilities, netting $ 16,384,000,000 $ 14,749,000,000