v3.26.1
Derivatives - Schedule of Notional Amount and Fair Value of Derivative Instruments (Details) - USD ($)
Mar. 31, 2026
Dec. 31, 2025
Derivatives, Fair Value [Line Items]    
Assets, gross $ 8,352,000,000 $ 9,190,000,000
Assets 5,431,000,000 6,425,000,000
Liabilities, gross 5,835,000,000 5,742,000,000
Liabilities $ 19,430,000,000 $ 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 $ 1,011,000,000 $ 856,000,000
Liabilities, gross 1,003,000,000 1,174,000,000
Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Assets, subtotal 4,420,000,000 5,569,000,000
Liabilities 18,427,000,000 19,467,000,000
Swaps | Derivatives designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 26,971,000,000 26,437,000,000
Assets, gross 787,000,000 560,000,000
Liabilities, gross 660,000,000 868,000,000
Swaps | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 20,398,000,000 19,248,000,000
Assets, gross 335,000,000 230,000,000
Liabilities, gross 561,000,000 744,000,000
Forwards | Derivatives designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 1,950,000,000 2,302,000,000
Assets, gross 99,000,000 81,000,000
Liabilities, gross 21,000,000 34,000,000
Forwards | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 47,663,000,000 47,486,000,000
Assets, gross 1,011,000,000 857,000,000
Liabilities, gross 3,482,000,000 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 275,000,000 242,000,000
Forwards on net investments | Derivatives designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 243,000,000 234,000,000
Assets, gross 5,000,000 0
Liabilities, gross 0 0
Interest rate swaps and forwards and other swaps | Derivatives designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 35,231,000,000 31,252,000,000
Assets, gross 69,000,000 129,000,000
Liabilities, gross 47,000,000 30,000,000
Interest rate swaps and forwards and other swaps | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 26,803,000,000 14,606,000,000
Assets, gross 115,000,000 72,000,000
Liabilities, gross 448,000,000 295,000,000
Equity options | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 100,871,000,000 97,259,000,000
Assets, gross 5,683,000,000 6,905,000,000
Liabilities, gross 327,000,000 170,000,000
Futures | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 52,000,000 890,000,000
Assets, gross 88,000,000 192,000,000
Liabilities, gross 0 1,000,000
Other swaps | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 2,262,000,000 2,845,000,000
Assets, gross 109,000,000 78,000,000
Liabilities, gross 14,000,000 2,000,000
Funds withheld, including related parties | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Assets, netting (2,921,000,000) (2,765,000,000)
Liabilities, netting 46,000,000 150,000,000
Interest sensitive contract liabilities | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Assets, netting 0 0
Liabilities, netting $ 13,549,000,000 $ 14,749,000,000