| Fiscal period | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 |
| Period End Date | 12/31/2025 | 12/31/2024 | 12/31/2023 | 12/31/2022 | 12/31/2021 | 12/31/2020 | 12/31/2019 | 12/31/2018 | 12/31/2017 | 12/31/2016 |
| Loans and Leases | 2,280.10 | 2,567.10 | 2,551.10 | 1,344.30 | 713.50 | 774.60 | 1,153.40 | 1,098.80 | 919.10 | 806.50 |
| Securities-Taxable | 1,879.40 | 1,888.60 | 1,534.40 | 899.90 | 667.60 | 812.40 | 1,070.70 | 905.20 | 594.10 | 428.80 |
| Securities-Non-Taxable | 1.00 | 1.10 | 1.30 | 1.30 | 1.50 | 1.40 | 3.80 | 7.00 | 9.80 | 7.50 |
| Time Deposits with Banks | 86.60 | 122.60 | 130.10 | 46.60 | 9.10 | 22.40 | 72.40 | 70.00 | 63.80 | 64.30 |
| Federal Reserve Deposits and Other | 1,463.80 | 1,735.90 | 1,462.30 | 472.10 | 14.80 | 32.70 | 199.60 | 240.40 | 182.60 | 109.80 |
| Federal Funds Sold and Securities Purchased under Agreements to Resell and Other | 2,829.20 | 3,340.20 | 1,585.20 | 103.70 | -- | -- | -- | -- | -- | -- |
| Federal funds sold | -- | -- | 0.30 | -- | -- | -- | -- | -- | -- | -- |
| Other interest-earning assets | 84.50 | 106.80 | 60.30 | 9.80 | -- | -- | -- | -- | -- | -- |
| Interest Income | 8,624.60 | 9,762.30 | 7,325.00 | 2,877.70 | 1,406.50 | 1,643.50 | 2,499.90 | 2,321.40 | 1,769.40 | 1,416.90 |
| Deposits | 2,663.90 | 3,415.90 | 2,685.30 | 602.80 | (61.30) | 48.40 | 488.90 | 384.60 | 182.10 | 83.50 |
| Long-Term Debt | 220.90 | 223.50 | 147.20 | 44.00 | 21.10 | 26.50 | 38.30 | 45.00 | 39.20 | 26.40 |
| Commercial Paper | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Senior Notes | 157.50 | 173.50 | 170.00 | 92.70 | 48.30 | 72.70 | 72.60 | 53.40 | 46.90 | 46.80 |
| Floating Rate Capital Debt | -- | -- | -- | -- | 1.70 | 4.20 | 8.20 | 7.50 | 4.90 | 3.50 |
| Federal Funds Purchased | 94.10 | 129.20 | 256.90 | 34.10 | (0.40) | 2.20 | 25.90 | 50.30 | 10.40 | 1.50 |
| Securities Sold under Agreements to Repurchase | 2,763.20 | 3,280.40 | 1,541.10 | 90.70 | 0.20 | 1.00 | 6.40 | 7.80 | 6.00 | 2.30 |
| Other Borrowings | 314.00 | 362.70 | 542.50 | 126.20 | 14.20 | 45.30 | 181.70 | 150.10 | 50.70 | 18.00 |
| Interest expense | 6,213.60 | 7,585.20 | 5,343.00 | 990.50 | 23.80 | 200.30 | 822.00 | 698.70 | 340.20 | 182.00 |
| Net Interest Income | 2,411.00 | 2,177.10 | 1,982.00 | 1,887.20 | 1,382.70 | 1,443.20 | 1,677.90 | 1,622.70 | 1,429.20 | 1,234.90 |
| Provision for credit losses | (7.50) | (3.00) | 24.50 | 12.00 | (81.50) | 125.00 | (14.50) | (14.50) | (28.00) | (26.00) |
| Net interest income after provision for credit losses | 2,418.50 | 2,180.10 | 1,957.50 | 1,875.20 | 1,464.20 | 1,318.20 | 1,692.40 | 1,637.20 | 1,457.20 | 1,260.90 |
| Treasury Management Fees | 38.70 | 35.70 | 31.60 | 39.30 | 44.30 | 45.40 | 44.50 | 51.80 | 56.40 | 62.80 |
| Investment Security Gains, net | 0.00 | (189.30) | (169.50) | (214.00) | (0.30) | (0.40) | (1.40) | (1.00) | (1.60) | (3.20) |
| Gain on Visa Share Redemption | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Trust, Investment and Other Servicing Fees | 5,017.80 | 4,727.80 | 4,361.80 | 4,432.60 | 4,361.10 | 3,995.00 | 3,852.10 | 3,753.70 | 3,434.30 | 3,108.10 |
| Security Commissions and Trading Income | 170.40 | 150.50 | 135.00 | 136.20 | 140.20 | 133.20 | 103.60 | 98.30 | 89.60 | 81.40 |
| Foreign Exchange Trading Profits | 240.80 | 231.20 | 203.90 | 288.60 | 292.60 | 290.40 | 250.90 | 307.20 | 209.90 | 236.60 |
| Other Operating Income | 207.70 | 1,157.40 | 228.70 | 191.30 | 243.90 | 194.00 | 145.50 | 127.50 | 157.50 | 241.20 |
| Loan Service Fees | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Banking Service Fees | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Gains (Losses) from Equity Investments | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Gain on Sale of a Retail Branch | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Gain on Sale of Nonperforming Loans | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Gain on Sale of Buildings | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Other Income | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Loss on Sale of Non-U.S. Subsidiary | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Non-Trading Foreign Exchange Gains (Losses) | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Credit Default Swap Gains (Losses) | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Total Noninterest Income | 5,675.40 | 6,113.30 | 4,791.50 | 4,874.00 | 5,081.80 | 4,657.60 | 4,395.20 | 4,337.50 | 3,946.10 | 3,726.90 |
| Compensation | 2,571.30 | 2,471.10 | 2,321.80 | 2,248.00 | 2,011.00 | 1,947.10 | 1,859.00 | 1,806.90 | 1,733.70 | 1,541.10 |
| Employee Benefits | 462.10 | 417.80 | 405.20 | 437.40 | 431.40 | 387.70 | 355.20 | 356.70 | 319.90 | 293.30 |
| Occupancy expense | 217.30 | 216.80 | 232.30 | 219.10 | 208.70 | 230.10 | 212.90 | 201.10 | 191.80 | 177.40 |
| Other Operating Expenses | 345.30 | 455.20 | 472.90 | 359.30 | 299.10 | 346.70 | 329.80 | 330.60 | 331.60 | 364.40 |
| Equipment Expense | -- | -- | -- | -- | -- | -- | -- | -- | -- | 467.40 |
| Outside Services Purchased | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Software Amortization and Other Costs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Business Promotion | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Other Intangibles Amortization | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Software Asset Retirements | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Other Expenses | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Telecommunications | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Postage and Supplies | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Goodwill Amortization | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Outside Services | 988.50 | 998.00 | 906.50 | 880.30 | 849.40 | 763.10 | 774.50 | 739.40 | 668.40 | 627.10 |
| Equipment and Software Expense | 1,169.90 | 1,075.00 | 945.50 | 838.80 | 736.30 | 673.50 | 612.10 | 582.20 | 524.00 | -- |
| Visa Indemnification Charges | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Capital Support Agreements | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Securities Lending Client Support | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Auction Rate Securities Purchase Program | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| FDIC Insurance Premiums | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Staff Related | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Total noninterest expenses | 5,754.40 | 5,633.90 | 5,284.20 | 4,982.90 | 4,535.90 | 4,348.20 | 4,143.50 | 4,016.90 | 3,769.40 | 3,470.70 |
| Income Before Income Taxes | 2,339.50 | 2,659.50 | 1,464.80 | 1,766.30 | 2,010.10 | 1,627.60 | 1,944.10 | 1,957.80 | 1,633.90 | 1,517.10 |
| Current Tax Provision:Federal | -- | -- | 250.50 | 357.70 | 241.50 | 203.00 | 216.40 | 132.80 | -- | -- |
| Current Tax Provision:State | -- | -- | 63.20 | 84.70 | 74.00 | 57.20 | 50.70 | 95.40 | -- | -- |
| Current Tax Provision:Non-U.S | -- | -- | 92.00 | 130.60 | 147.30 | 141.70 | 150.50 | 162.70 | -- | -- |
| Deferred Tax Provision:Federal | -- | -- | (54.00) | (126.00) | (11.70) | 8.80 | 16.50 | 33.80 | -- | -- |
| Deferred Tax Provision:State | -- | -- | (1.40) | (10.70) | 12.00 | 5.40 | 16.50 | (13.80) | -- | -- |
| Provision for income taxes | 602.60 | 628.40 | 357.50 | 430.30 | 464.80 | 418.30 | 451.90 | 401.40 | 434.90 | 484.60 |
| Deferred Tax Provision:Non-U.S | -- | -- | 7.20 | (6.00) | 1.70 | 2.20 | 1.30 | (9.50) | -- | -- |
| Income from Continuing Operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income (Loss) from Discontinued Operations of NTRC | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Loss on Disposal of NTRC | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income Tax Benefit (Expense) | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Consolidated Net Income (Loss) | 1,736.90 | 2,031.10 | 1,107.30 | 1,336.00 | 1,545.30 | 1,209.30 | 1,492.20 | 1,556.40 | 1,199.00 | 1,032.50 |
| Dividends on Preferred Stock | 41.80 | 41.80 | 41.80 | 41.80 | 41.80 | 56.20 | 46.40 | 46.40 | 49.80 | 23.40 |
| Earnings allocated to participating securities | 15.90 | 16.90 | 11.60 | 11.80 | 12.90 | -- | 16.90 | 20.10 | 18.80 | 18.70 |
| Net income allocated to common stockholders | 1,679.20 | 1,972.40 | 1,053.90 | 1,282.40 | 1,490.60 | 1,153.10 | 1,428.90 | 1,489.90 | 1,130.40 | 990.40 |
| Income from Continuing Operations-Basic | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Net Income Per Common Share- Basic | 8.78 | 9.80 | 5.09 | 6.16 | 7.16 | 5.48 | 6.66 | 6.68 | 4.95 | 4.35 |
| Income from Continuing Operations-Diluted | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Net Income Per Common Share- Diluted | 8.74 | 9.77 | 5.08 | 6.14 | 7.14 | 5.46 | 6.63 | 6.64 | 4.92 | 4.32 |
| Average Number of Common Shares Outstanding-Basic | 191.36 | 201.26 | 207.25 | 208.31 | 208.08 | 208.32 | 214.53 | 223.15 | 228.26 | 227.58 |
| Average Number of Common Shares Outstanding-Diluted | 192.25 | 201.87 | 207.56 | 208.87 | 208.90 | 209.01 | 215.60 | 224.49 | 229.65 | 229.15 |