v3.26.1
Fair value measurement - Financial Instruments (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Assets:    
Interest-bearing deposits with the Federal Reserve and other central banks $ 139,400 $ 116,009
Interest-bearing deposits with banks 12,276 10,397
Securities held-to-maturity 45,317 45,377
Other financial assets 2,125 1,666
Liabilities:    
Noninterest-bearing deposits 86,309 59,979
Payables to customers and broker-dealers 25,734 21,872
Commercial paper 4,816 2,003
Estimated fair value    
Assets:    
Interest-bearing deposits with the Federal Reserve and other central banks 139,400 116,009
Interest-bearing deposits with banks 12,278 10,398
Federal funds sold and securities purchased under resale agreements 48,937 44,892
Securities held-to-maturity 45,317 45,377
Loans 87,589 79,418
Other financial assets 10,076 7,560
Total assets 343,597 303,654
Liabilities:    
Noninterest-bearing deposits 86,309 59,979
Interest-bearing deposits 277,912 265,730
Federal funds purchased and securities sold under repurchase agreements 26,114 18,992
Payables to customers and broker-dealers 25,734 21,872
Commercial paper 4,816 2,003
Borrowings 1,114 1,191
Long-term debt 30,302 32,256
Total liabilities 452,301 402,023
Estimated fair value | Level 1    
Assets:    
Interest-bearing deposits with the Federal Reserve and other central banks 0 0
Interest-bearing deposits with banks 0 0
Federal funds sold and securities purchased under resale agreements 0 0
Securities held-to-maturity 8,183 10,014
Loans 0 0
Other financial assets 7,483 5,111
Total assets 15,666 15,125
Liabilities:    
Noninterest-bearing deposits 0 0
Interest-bearing deposits 0 0
Federal funds purchased and securities sold under repurchase agreements 0 0
Payables to customers and broker-dealers 0 0
Commercial paper 0 0
Borrowings 0 0
Long-term debt 0 0
Total liabilities 0 0
Estimated fair value | Level 2    
Assets:    
Interest-bearing deposits with the Federal Reserve and other central banks 139,400 116,009
Interest-bearing deposits with banks 12,278 10,398
Federal funds sold and securities purchased under resale agreements 48,937 44,892
Securities held-to-maturity 37,134 35,363
Loans 87,589 79,418
Other financial assets 2,593 2,449
Total assets 327,931 288,529
Liabilities:    
Noninterest-bearing deposits 86,309 59,979
Interest-bearing deposits 277,912 265,730
Federal funds purchased and securities sold under repurchase agreements 26,114 18,992
Payables to customers and broker-dealers 25,734 21,872
Commercial paper 4,816 2,003
Borrowings 1,114 1,191
Long-term debt 30,302 32,256
Total liabilities 452,301 402,023
Estimated fair value | Level 3    
Assets:    
Interest-bearing deposits with the Federal Reserve and other central banks 0 0
Interest-bearing deposits with banks 0 0
Federal funds sold and securities purchased under resale agreements 0 0
Securities held-to-maturity 0 0
Loans 0 0
Other financial assets 0 0
Total assets 0 0
Liabilities:    
Noninterest-bearing deposits 0 0
Interest-bearing deposits 0 0
Federal funds purchased and securities sold under repurchase agreements 0 0
Payables to customers and broker-dealers 0 0
Commercial paper 0 0
Borrowings 0 0
Long-term debt 0 0
Total liabilities 0 0
Carrying amount    
Assets:    
Interest-bearing deposits with the Federal Reserve and other central banks 139,400 116,009
Interest-bearing deposits with banks 12,276 10,397
Federal funds sold and securities purchased under resale agreements 48,937 44,892
Securities held-to-maturity 48,256 48,094
Loans 88,430 80,278
Other financial assets 10,076 7,560
Total assets 347,375 307,230
Liabilities:    
Noninterest-bearing deposits 86,309 59,979
Interest-bearing deposits 284,232 271,915
Federal funds purchased and securities sold under repurchase agreements 26,114 18,992
Payables to customers and broker-dealers 25,734 21,872
Commercial paper 4,816 2,003
Borrowings 1,114 1,191
Long-term debt 30,368 31,873
Total liabilities $ 458,687 $ 407,825