v3.25.3
Derivatives - Schedule of Notional Amount and Fair Value of Derivative Instruments (Details) - USD ($)
Sep. 30, 2025
Dec. 31, 2024
Derivatives, Fair Value [Line Items]    
Assets, gross $ 8,884,000,000 $ 8,154,000,000
Assets 6,006,000,000 4,504,000,000
Liabilities, gross 4,853,000,000 3,556,000,000
Liabilities $ 19,324,000,000 $ 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 $ 948,000,000 $ 1,335,000,000
Liabilities, gross 1,207,000,000 1,008,000,000
Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Assets, subtotal 5,058,000,000 3,169,000,000
Liabilities 18,117,000,000 13,794,000,000
Foreign currency swaps | Derivatives designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 23,466,000,000 15,669,000,000
Assets, gross 643,000,000 938,000,000
Liabilities, gross 878,000,000 211,000,000
Foreign currency swaps | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 17,816,000,000 14,908,000,000
Assets, gross 248,000,000 600,000,000
Liabilities, gross 821,000,000 199,000,000
Foreign currency forwards | Derivatives designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 2,626,000,000 3,139,000,000
Assets, gross 82,000,000 331,000,000
Liabilities, gross 40,000,000 5,000,000
Foreign currency forwards | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 41,581,000,000 39,598,000,000
Assets, gross 644,000,000 1,054,000,000
Liabilities, gross 2,363,000,000 2,083,000,000
Interest rate swaps | Derivatives designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 4,382,000,000 4,506,000,000
Assets, gross 78,000,000 0
Liabilities, gross 257,000,000 654,000,000
Forwards on net investments | Derivatives designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 236,000,000 218,000,000
Assets, gross 3,000,000 11,000,000
Liabilities, gross 0 0
Interest rate swaps | Derivatives designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 28,196,000,000 24,885,000,000
Assets, gross 142,000,000 55,000,000
Liabilities, gross 32,000,000 138,000,000
Interest rate swaps | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 13,235,000,000 3,255,000,000
Assets, gross 73,000,000 67,000,000
Liabilities, gross 300,000,000 124,000,000
Equity options | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 93,793,000,000 85,452,000,000
Assets, gross 6,808,000,000 5,002,000,000
Liabilities, gross 155,000,000 126,000,000
Futures | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 50,000,000 37,000,000
Assets, gross 155,000,000 93,000,000
Liabilities, gross 7,000,000 11,000,000
Other swaps | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Notional Amount 2,285,000,000 2,644,000,000
Assets, gross 8,000,000 3,000,000
Liabilities, gross 0 5,000,000
Funds withheld, including related parties | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Assets, netting (2,878,000,000) (3,650,000,000)
Liabilities, netting 172,000,000 4,000,000
Interest sensitive contract liabilities | Derivatives not designated as hedges    
Derivatives, Fair Value [Line Items]    
Assets, netting 0 0
Liabilities, netting $ 14,299,000,000 $ 11,242,000,000