v3.26.3
Fair Value Measurements - Significant Unobservable Inputs Freestanding Derivatives (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation    
Assets, Fair Value Disclosure $ 50,943 $ 50,655
Fair Value, Inputs, Level 3 [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation    
Derivative Assets (Liabilities), at Fair Value, Net 1 1
Assets, Fair Value Disclosure 4,332 4,028
Quoted Prices in
Active Markets
for Identical
Assets
(Level 1)    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation    
Assets, Fair Value Disclosure 889 966
Significant
Observable
Inputs
(Level 2)    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation    
Assets, Fair Value Disclosure $ 45,722 $ 45,661