v3.25.2
Derivative Financial Instruments - Notional Amounts and Fair Values for All Derivative Instruments Included in the Condensed Consolidated Balance Sheets (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Derivatives, Fair Value    
Derivative Assets $ 1,997 $ 2,472
Derivative Liabilities 2,266 2,798
Amount of variation margin payment applied to derivative asset contracts (324) (403)
Amount of variation margin payment applied to derivative liability contracts 549 1,200
Designated as Hedging Instrument    
Derivatives, Fair Value    
Derivative Assets 1 7
Derivative Liabilities 37 16
Designated as Hedging Instrument | Fair Value Hedging    
Derivatives, Fair Value    
Derivative Assets 1 1
Derivative Liabilities 7 12
Designated as Hedging Instrument | Fair Value Hedging | Interest rate swap | Long-term debt    
Derivatives, Fair Value    
Notional Amount 4,955 4,955
Derivative Assets 1 1
Derivative Liabilities 7 12
Designated as Hedging Instrument | Cash Flow Hedging    
Derivatives, Fair Value    
Derivative Assets 0 6
Derivative Liabilities 30 4
Designated as Hedging Instrument | Cash Flow Hedging | Interest rate swap | Commercial and industrial    
Derivatives, Fair Value    
Notional Amount 11,000 11,000
Derivative Assets 0 2
Derivative Liabilities 2 4
Designated as Hedging Instrument | Cash Flow Hedging | Interest rate swap | Commercial mortgage and commercial construction    
Derivatives, Fair Value    
Notional Amount 4,000  
Derivative Assets 0  
Derivative Liabilities 28  
Designated as Hedging Instrument | Cash Flow Hedging | Forward starting interest rate swap | Commercial and industrial    
Derivatives, Fair Value    
Notional Amount   1,000
Derivative Assets   1
Derivative Liabilities   0
Designated as Hedging Instrument | Cash Flow Hedging | Forward starting interest rate swap | Commercial mortgage and commercial construction    
Derivatives, Fair Value    
Notional Amount   4,000
Derivative Assets   3
Derivative Liabilities   0
Not Designated as Hedging Instrument    
Derivatives, Fair Value    
Derivative Assets 1,996 2,465
Derivative Liabilities 2,229 2,782
Not Designated as Hedging Instrument | Risk Management and Other Business Purposes    
Derivatives, Fair Value    
Derivative Assets 11 15
Derivative Liabilities 155 174
Not Designated as Hedging Instrument | Risk Management and Other Business Purposes | Interest rate contracts related to MSR portfolio    
Derivatives, Fair Value    
Notional Amount 3,720 3,135
Derivative Assets 10 4
Derivative Liabilities 0 4
Not Designated as Hedging Instrument | Risk Management and Other Business Purposes | Forward contracts related to residential mortgage loans measured at fair value | Loans Measured At Fair Value    
Derivatives, Fair Value    
Notional Amount 1,050 881
Derivative Assets 1 8
Derivative Liabilities 8 0
Not Designated as Hedging Instrument | Risk Management and Other Business Purposes | Swap    
Derivatives, Fair Value    
Notional Amount 2,753 2,465
Derivative Assets 0 0
Derivative Liabilities 145 170
Not Designated as Hedging Instrument | Risk Management and Other Business Purposes | Foreign exchange contracts    
Derivatives, Fair Value    
Notional Amount 125 104
Derivative Assets 0 2
Derivative Liabilities 1 0
Not Designated as Hedging Instrument | Risk Management and Other Business Purposes | Interest-only strips    
Derivatives, Fair Value    
Notional Amount 26 30
Derivative Assets 0 0
Derivative Liabilities 0 0
Not Designated as Hedging Instrument | Risk Management and Other Business Purposes | Interest rate contracts for collateral management    
Derivatives, Fair Value    
Notional Amount   1,000
Derivative Assets   1
Derivative Liabilities   0
Not Designated as Hedging Instrument | Risk Management and Other Business Purposes | Interest rate contracts for LIBOR transition    
Derivatives, Fair Value    
Notional Amount 597 597
Derivative Assets 0 0
Derivative Liabilities 0 0
Not Designated as Hedging Instrument | Risk Management and Other Business Purposes | Other    
Derivatives, Fair Value    
Notional Amount 48 43
Derivative Assets 0 0
Derivative Liabilities 1 0
Not Designated as Hedging Instrument | Customer Accommodation    
Derivatives, Fair Value    
Derivative Assets 1,985 2,450
Derivative Liabilities 2,074 2,608
Not Designated as Hedging Instrument | Customer Accommodation | Foreign exchange contracts    
Derivatives, Fair Value    
Notional Amount 31,550 38,640
Derivative Assets 729 1,165
Derivative Liabilities 699 1,120
Not Designated as Hedging Instrument | Customer Accommodation | Interest rate contracts    
Derivatives, Fair Value    
Notional Amount 83,622 87,928
Derivative Assets 510 708
Derivative Liabilities 634 924
Amount of variation margin payment applied to derivative asset contracts (155) (257)
Amount of variation margin payment applied to derivative liability contracts 36 45
Not Designated as Hedging Instrument | Customer Accommodation | Interest rate lock commitments    
Derivatives, Fair Value    
Notional Amount 374 264
Derivative Assets 7 2
Derivative Liabilities 0 0
Not Designated as Hedging Instrument | Customer Accommodation | Commodity contracts    
Derivatives, Fair Value    
Notional Amount 17,494 16,889
Derivative Assets 739 575
Derivative Liabilities 741 564
Not Designated as Hedging Instrument | Customer Accommodation | TBA securities    
Derivatives, Fair Value    
Notional Amount 39 44
Derivative Assets 0 0
Derivative Liabilities $ 0 $ 0