v3.25.1
Repurchase Agreements And Reverse Repurchase Agreements (Narrative) (Details)
$ in Millions
Mar. 31, 2025
USD ($)
days
Dec. 31, 2024
USD ($)
days
Assets Sold under Agreements to Repurchase [Line Items]    
Receivable Under Reverse Repurchase Agreements $ 17,604 $ 17,137
Securities Sold under Agreements to Repurchase 66,138 60,798
Obligation to Return Securities Borrowed Under Reverse Repurchase Agreements at Fair Value $ 17,180 $ 16,676
Short-term Debt, Weighted Average Interest Rate, at Point in Time 4.47% 4.76%
Debt of consolidated variable interest entities, at fair value $ (62) $ (64)
TBA securities Fifteen Year and Thirty Year Securities [Member]    
Assets Sold under Agreements to Repurchase [Line Items]    
Derivative, Fair Value, Net 44 (26)
TBA and Forward Settling Agency Securities [Member]    
Assets Sold under Agreements to Repurchase [Line Items]    
Derivative, Forward Settlement Value 7,429 6,887
Derivative, Fair Value, Net 44 (26)
Maturity Overnight [Member]    
Assets Sold under Agreements to Repurchase [Line Items]    
Securities Sold under Agreements to Repurchase 25,700 25,400
Maturity Overnight [Member] | US Treasury Securities [Member]    
Assets Sold under Agreements to Repurchase [Line Items]    
Securities Sold under Agreements to Repurchase 2,200  
Forward Contracts [Member]    
Assets Sold under Agreements to Repurchase [Line Items]    
Securities Sold under Agreements to Repurchase $ 17,500 $ 17,300
Weighted Average Forward Start Days | days 1 2
Short-term Debt, Weighted Average Interest Rate, at Point in Time 4.42% 4.61%
Bethesda Securities [Member]    
Assets Sold under Agreements to Repurchase [Line Items]    
Percentage of Repurchase Agreement Funding 49.00% 50.00%
FICC [Member]    
Assets Sold under Agreements to Repurchase [Line Items]    
Percentage of Repurchase Agreement Funding 47.00% 47.00%
Obligation to Return Securities Borrowed Under Reverse Repurchase Agreements at Fair Value $ 4,100 $ 3,900