| Carrying Value of Securities Purchased under Agreements to Resell and Deposits Paid for Securities Borrowed | 356.20B | as of 2025-12-31 |
| Current Federal Tax Expense (Benefit) | -43.00M | 2025-01-01 → 2025-12-31 |
| Current State and Local Tax Expense (Benefit) | -176.00M | 2025-01-01 → 2025-12-31 |
| Carrying Value of Federal Funds Sold, Securities Purchased under Agreements to Resell, and Deposits Paid for Securities Borrowed | 356.19B | as of 2025-12-31 |
| Current Foreign Tax Expense (Benefit) | 5.14B | 2025-01-01 → 2025-12-31 |
| Current Income Tax Expense (Benefit) | 4.92B | 2025-01-01 → 2025-12-31 |
| Carrying Value of Securities Sold under Repurchase Agreements and Deposits Received for Securities Loaned | 348.10B | as of 2025-12-31 |
| Deferred Federal Income Tax Expense (Benefit) | 23.00M | 2025-01-01 → 2025-12-31 |
| Deferred State and Local Income Tax Expense (Benefit) | 328.00M | 2025-01-01 → 2025-12-31 |
| Carrying Value of Federal Funds Purchased, Securities Sold under Agreements to Repurchase, and Deposits Received for Securities Loaned | 348.10B | as of 2025-12-31 |
| Deferred Foreign Income Tax Expense (Benefit) | 101.00M | 2025-01-01 → 2025-12-31 |
| Loans Receivable, Fair Value Disclosure | 6.86B | as of 2025-12-31 |
| Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense | -38.00M | 2025-01-01 → 2025-12-31 |
| Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization | 33.34B | as of 2025-12-31 |
| Federal Income Tax Expense (Benefit), Continuing Operations | -20.00M | 2025-01-01 → 2025-12-31 |
| State and Local Income Tax Expense (Benefit), Continuing Operations | 152.00M | 2025-01-01 → 2025-12-31 |
| Foreign Income Tax Expense (Benefit), Continuing Operations | 5.24B | 2025-01-01 → 2025-12-31 |
| Dividends, Preferred Stock | 1.11B | 2025-01-01 → 2025-12-31 |
| Debt Securities, Trading, and Equity Securities, FV-NI | 537.14B | as of 2025-12-31 |
| Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement | 489.31B | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount | 4.16B | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount | 467.00M | 2025-01-01 → 2025-12-31 |
| Share-based Payment Arrangement, Expense, Tax Benefit | 447.00M | 2025-01-01 → 2025-12-31 |
| Debt Securities, Trading, Restricted | 228.82B | as of 2025-12-31 |
| EffectiveIncomeTaxRateReconciliationGiltiAmount | 212.00M | 2025-01-01 → 2025-12-31 |
| EffectiveIncomeTaxRateReconciliationCrossBorderOtherAmount | 19.00M | 2025-01-01 → 2025-12-31 |
| Securities Purchased under Agreements to Resell, Gross | 667.95B | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount | 349.00M | 2025-01-01 → 2025-12-31 |
| Securities Purchased under Agreements to Resell, Liability | 388.23B | as of 2025-12-31 |
| Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount | 1.10B | as of 2025-12-31 |
| Securities Purchased under Agreements to Resell, Collateral, Obligation to Return Securities | 273.37B | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Credit, Other, Amount | 279.00M | 2025-01-01 → 2025-12-31 |
| Fair Value of Securities Received as Collateral that Can be Resold or Repledged | 1.06T | as of 2025-12-31 |
| Securities Purchased under Agreements to Resell, Amount Offset Against Collateral | 6.36B | as of 2025-12-31 |
| Loss Contingency, Estimate of Possible Loss | 1.20B | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount | -151.00M | 2025-01-01 → 2025-12-31 |
| Equity Securities without Readily Determinable Fair Value, Amount | 1.71B | as of 2025-12-31 |
| Restructuring Reserve, Foreign Currency Translation Gain (Loss) | -5.00M | 2025-01-01 → 2025-12-31 |
| Securities Borrowed, Gross | 105.38B | as of 2025-12-31 |
| Securities Borrowed, Liability | 28.91B | as of 2025-12-31 |
| Securities Borrowed, Collateral, Obligation to Return Securities | 25.24B | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Contingency, Amount | -338.00M | 2025-01-01 → 2025-12-31 |
| Time Deposits, at or Above FDIC Insurance Limit | 196.42B | as of 2025-12-31 |
| Securities Borrowed, Amount Offset Against Collateral | 51.24B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Realized Gain (Loss) | -184.00M | 2025-01-01 → 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, Year One | 235.00M | as of 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, Year Two | 226.00M | as of 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, Year Three | 215.00M | as of 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, Year Four | 183.00M | as of 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, Year Five | 143.00M | as of 2025-12-31 |
| Guarantor Obligations, Maximum Exposure, Undiscounted | 649.70B | as of 2025-12-31 |
| Guarantor Obligations, Current Carrying Value | 1.21B | as of 2025-12-31 |
| Derivative Asset, Fair Value, Gross Liability | 406.41B | as of 2025-12-31 |
| Derivative Liability, Fair Value, Gross Asset | 406.41B | as of 2025-12-31 |
| Net Income (Loss) Available to Common Stockholders, Diluted | 13.10B | 2025-01-01 → 2025-12-31 |
| Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement | 485.25B | as of 2025-12-31 |
| Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | 26.00M | 2025-01-01 → 2025-12-31 |
| Securities Sold under Agreements to Repurchase, Gross | 716.42B | as of 2025-12-31 |
| Securities Sold under Agreements to Repurchase, Asset | 388.23B | as of 2025-12-31 |
| Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities | 283.62B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 416.00M | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 711.00M | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | 1.13B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Restricted | 4.93B | as of 2025-12-31 |
| Securities Sold under Agreements to Repurchase, Amount Offset Against Collateral | 44.57B | as of 2025-12-31 |
| Time Deposit Maturities, Year One | 245.51B | as of 2025-12-31 |
| Time Deposit Maturities, Year Two | 2.38B | as of 2025-12-31 |
| Securities Loaned, Gross | 48.81B | as of 2025-12-31 |
| Time Deposit Maturities, Year Three | 587.00M | as of 2025-12-31 |
| Securities Loaned, Asset | 28.91B | as of 2025-12-31 |
| Time Deposit Maturities, Year Four | 264.00M | as of 2025-12-31 |
| Time Deposit Maturities, Year Five | 192.00M | as of 2025-12-31 |
| Securities Loaned, Collateral, Right to Reclaim Securities | 17.20B | as of 2025-12-31 |
| Time Deposit Maturities, after Year Five | 134.00M | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | 54.58B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 24.88B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Unrealized Loss Position | 79.45B | as of 2025-12-31 |
| Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase | 0 | 2025-01-01 → 2025-12-31 |
| Derivative Asset, Fair Value, Amount Offset Against Collateral | 49.02B | as of 2025-12-31 |
| Financing Receivable, Allowance for Credit Loss, Recovery | 2.00B | 2025-01-01 → 2025-12-31 |
| Derivative Liability, Fair Value, Amount Offset Against Collateral | 53.77B | as of 2025-12-31 |
| Financing Receivable, Allowance for Credit Loss, Writeoff | 11.10B | 2025-01-01 → 2025-12-31 |
| Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery | 9.10B | 2025-01-01 → 2025-12-31 |
| Derivative Credit Risk Valuation Adjustment, Derivative Assets | 618.00M | as of 2025-12-31 |
| Securities Loaned, Amount Offset Against Collateral | 2.71B | as of 2025-12-31 |
| Derivative Credit Risk Valuation Adjustment, Derivative Liabilities | 331.00M | as of 2025-12-31 |
| Goodwill, Foreign Currency Translation Gain (Loss) | 524.00M | 2025-01-01 → 2025-12-31 |
| Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | 10.47B | as of 2025-12-31 |
| Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 156.00M | as of 2025-12-31 |
| Financing Receivable, Reclassification to Held-for-sale | 4.94B | 2025-01-01 → 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal | 9.50B | 2025-01-01 → 2025-12-31 |
| Operating Lease, Cost | 817.00M | 2025-01-01 → 2025-12-31 |
| Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits | 2.49B | as of 2025-12-31 |
| Variable Lease, Cost | 195.00M | 2025-01-01 → 2025-12-31 |
| Lease, Cost | 1.01B | 2025-01-01 → 2025-12-31 |
| Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Provision for Loan Losses | 5.75B | as of 2025-12-31 |
| Right-of-Use Asset Obtained in Exchange for Operating Lease Liability | 713.00M | 2025-01-01 → 2025-12-31 |
| Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 374.00M | as of 2025-12-31 |
| Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 18.87B | as of 2025-12-31 |
| Financing Receivable, Collectively Evaluated for Impairment | 743.12B | as of 2025-12-31 |
| Financing Receivable, Individually Evaluated for Impairment | 2.15B | as of 2025-12-31 |
| Deferred Tax Assets, Property, Plant and Equipment | 5.19B | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year One | 718.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Two | 635.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Three | 546.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Four | 441.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Five | 363.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, after Year Five | 1.01B | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid | 3.71B | as of 2025-12-31 |
| Derivative, Collateral, Right to Reclaim Cash | 58.00M | as of 2025-12-31 |
| Deferred Tax Assets, Other | 8.20B | as of 2025-12-31 |
| Derivative, Collateral, Right to Reclaim Securities | 4.39B | as of 2025-12-31 |
| Derivative Liability, Collateral, Right to Reclaim Cash, Offset | 20.63B | as of 2025-12-31 |
| Derivative, Collateral, Obligation to Return Cash | 1.36B | as of 2025-12-31 |
| Deferred Tax Assets, Gross | 39.81B | as of 2025-12-31 |
| Derivative, Collateral, Obligation to Return Securities | 5.05B | as of 2025-12-31 |
| Deferred Tax Assets, Valuation Allowance | 4.98B | as of 2025-12-31 |
| Derivative Asset, Collateral, Obligation to Return Cash, Offset | 27.47B | as of 2025-12-31 |
| Deferred Tax Assets, Net of Valuation Allowance | 34.83B | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, Undiscounted Excess Amount | 548.00M | as of 2025-12-31 |
| Debt Securities, Held-to-maturity, Transfer, Amount | 0 | 2025-01-01 → 2025-12-31 |
| Deferred Tax Assets, Net | 29.53B | as of 2025-12-31 |
| Debt Securities, Held-to-maturity, Restricted | 70.00M | as of 2025-12-31 |
| Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount | 700.00M | 2025-01-01 → 2025-12-31 |
| Deferred Tax Liabilities, Derivatives | 293.00M | as of 2025-12-31 |
| Deferred Tax Liabilities, Undistributed Foreign Earnings | 834.00M | as of 2025-12-31 |
| Debt and Equity Securities, Gain (Loss) | 471.00M | 2025-01-01 → 2025-12-31 |
| DebtSecuritiesHeldToMaturityExcludingAccruedInterestCreditLossExpenseReversal | 12.00M | 2025-01-01 → 2025-12-31 |
| Marketable Securities, Realized Gain (Loss), Excluding Other-than-temporary Impairment Loss | 471.00M | 2025-01-01 → 2025-12-31 |
| Hedged Liability, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) | -2.98B | as of 2025-12-31 |
| Deferred Tax Liabilities, Other | 1.89B | as of 2025-12-31 |
| Deferred Tax Liabilities, Net | 5.29B | as of 2025-12-31 |
| Hedged Liability, Fair Value Hedge | 162.67B | as of 2025-12-31 |
| Undistributed Earnings of Foreign Subsidiaries | 5.90B | as of 2025-12-31 |
| Equity Securities without Readily Determinable Fair Value, Impairment Loss, Cumulative Amount | 555.00M | as of 2025-12-31 |
| Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) | 72.00M | as of 2025-12-31 |
| Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Cumulative Amount | 40.00M | as of 2025-12-31 |
| Hedged Asset, Fair Value Hedge, Last-of-Layer, Amount | 24.00B | as of 2025-12-31 |
| Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Cumulative Amount | 1.06B | as of 2025-12-31 |
| Hedged Asset, Fair Value Hedge, Last-of-Layer, Cumulative Increase (Decrease) | 17.00M | as of 2025-12-31 |
| Equity Securities without Readily Determinable Fair Value, Impairment Loss, Annual Amount | 154.00M | 2025-01-01 → 2025-12-31 |
| Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Annual Amount | 2.00M | 2025-01-01 → 2025-12-31 |
| Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount | 96.00M | 2025-01-01 → 2025-12-31 |
| Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months | -100.00M | 2025-01-01 → 2025-12-31 |
| Long-Term Debt, Maturity, Year One | 46.85B | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Two | 35.27B | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Three | 39.38B | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Four | 21.30B | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Five | 29.54B | as of 2025-12-31 |
| Long-Term Debt, Maturity, after Year Five | 143.48B | as of 2025-12-31 |
| Off-Balance Sheet, Credit Loss, Liability | 1.83B | as of 2025-12-31 |
| Off-Balance Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) | 202.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits | 860.00M | as of 2025-12-31 |
| Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions | 18.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions | 493.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions | 33.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities | 6.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations | 0 | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 800.00M | as of 2025-12-31 |
| Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount | 99.26B | as of 2025-12-31 |
| Loans Receivable Held-for-sale, Reconciliation to Cash Flow, Additions to Held-for-sale | 1.68B | 2025-01-01 → 2025-12-31 |
| Liability for Future Policy Benefit, after Reinsurance | 501.00M | as of 2025-12-31 |
| Income Tax Effects Allocated Directly to Equity, Equity Transactions | -11.00M | 2025-01-01 → 2025-12-31 |
| Income (Loss) from Continuing Operations before Income Taxes, Foreign | 15.80B | 2025-01-01 → 2025-12-31 |
| Financing Receivable, Purchased with Credit Deterioration, Amount at Par Value | 24.00M | 2025-01-01 → 2025-12-31 |
| Credit Derivative, Maximum Exposure, Undiscounted | 475.23B | as of 2025-12-31 |
| Credit Risk Derivative Assets, at Fair Value | 9.72B | as of 2025-12-31 |
| Credit Risk Derivative Liabilities, at Fair Value | 11.23B | as of 2025-12-31 |
| Derivative, Net Liability Position, Aggregate Fair Value | 16.00B | as of 2025-12-31 |
| Collateral Already Posted, Aggregate Fair Value | 13.00B | as of 2025-12-31 |
| Additional Collateral, Aggregate Fair Value | 200.00M | as of 2025-12-31 |
| Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement | 716.42B | as of 2025-12-31 |
| Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement | 765.23B | as of 2025-12-31 |
| Securities Loaned, Gross Including Not Subject to Master Netting Arrangement | 48.81B | as of 2025-12-31 |