| Securities Reserve Deposit Required and Made | 22.26B | as of 2025-12-31 |
| Current Federal Tax Expense (Benefit) | 2.23B | 2025-01-01 → 2025-12-31 |
| Current State and Local Tax Expense (Benefit) | 601.00M | 2025-01-01 → 2025-12-31 |
| Current Foreign Tax Expense (Benefit) | 1.53B | 2025-01-01 → 2025-12-31 |
| Current Income Tax Expense (Benefit) | 4.37B | 2025-01-01 → 2025-12-31 |
| Deferred Federal Income Tax Expense (Benefit) | 394.00M | 2025-01-01 → 2025-12-31 |
| Deferred State and Local Income Tax Expense (Benefit) | 91.00M | 2025-01-01 → 2025-12-31 |
| Deferred Foreign Income Tax Expense (Benefit) | 76.00M | 2025-01-01 → 2025-12-31 |
| Investments, Fair Value Disclosure | 156.08B | as of 2025-12-31 |
| Share-based Payment Arrangement, Expense | 1.93B | 2025-01-01 → 2025-12-31 |
| Debt Instrument, Fair Value Disclosure | 132.48B | as of 2025-12-31 |
| Deferred Compensation Arrangement with Individual, Compensation Expense | 950.00M | 2025-01-01 → 2025-12-31 |
| Derivative Asset, Not Subject to Master Netting Arrangement | 3.08B | as of 2025-12-31 |
| Dividends, Preferred Stock | 612.00M | 2025-01-01 → 2025-12-31 |
| Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure | 696.00M | as of 2025-12-31 |
| Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement | 333.76B | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount | 4.61B | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount | 430.00M | 2025-01-01 → 2025-12-31 |
| Share-based Payment Arrangement, Expense, Tax Benefit | 413.00M | 2025-01-01 → 2025-12-31 |
| Deposits, Fair Value Disclosure | 8.76B | as of 2025-12-31 |
| EffectiveIncomeTaxRateReconciliationCrossBorderTaxEffectAmount | 12.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount | 28.00M | 2025-01-01 → 2025-12-31 |
| Securities Purchased under Agreements to Resell, Liability | 350.90B | as of 2025-12-31 |
| Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | 876.00M | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Credit, Other, Amount | 260.00M | 2025-01-01 → 2025-12-31 |
| Securities Purchased under Agreements to Resell, Collateral, Obligation to Return Cash | 117.51B | as of 2025-12-31 |
| Securities Purchased under Agreements to Resell, Not Subject to Master Netting Arrangement | 1.28B | as of 2025-12-31 |
| Cash, FDIC Insured Amount | 331.32B | as of 2025-12-31 |
| Securities Purchased under Agreements to Resell, Gross Including Not Subject to Master Netting Arrangement | 471.14B | as of 2025-12-31 |
| Securities Purchased under Agreements to Resell, Amount Offset Against Collateral | 2.73B | as of 2025-12-31 |
| Interest Income (Expense), Nonoperating, Net | -109.00M | 2025-01-01 → 2025-12-31 |
| Affordable Housing Tax Credits and Other Tax Benefits, Amount | 290.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount | 30.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount | -413.00M | 2025-01-01 → 2025-12-31 |
| Amortization Method Qualified Affordable Housing Project Investments, Amortization | 237.00M | 2025-01-01 → 2025-12-31 |
| InvestmentProgramProportionalAmortizationMethodElectedIncomeTaxCreditAndOtherIncomeTaxBenefitAfterAmortizationExpense | 53.00M | 2025-01-01 → 2025-12-31 |
| Securities Borrowed, Liability | 66.84B | as of 2025-12-31 |
| Securities Borrowed, Collateral, Obligation to Return Cash | 146.73B | as of 2025-12-31 |
| DepositLiabilityForeignDepositorInDomesticOffice | 1.06B | as of 2025-12-31 |
| Securities Borrowed, Not Subject to Master Netting Arrangement | 38.00M | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Contingency, Amount | 99.00M | 2025-01-01 → 2025-12-31 |
| Securities Borrowed, Gross Including Not Subject to Master Netting Arrangement | 218.75B | as of 2025-12-31 |
| Dividends, Common Stock | 6.15B | 2025-01-01 → 2025-12-31 |
| Securities Borrowed, Amount Offset Against Collateral | 5.18B | as of 2025-12-31 |
| Accrued Liabilities and Other Liabilities | 29.62B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Realized Gain | 31.00M | 2025-01-01 → 2025-12-31 |
| Debt Securities, Available-for-sale, Realized Loss | 1.00M | 2025-01-01 → 2025-12-31 |
| Debt Securities, Available-for-sale, Realized Gain (Loss) | 30.00M | 2025-01-01 → 2025-12-31 |
| Nonredeemable Noncontrolling Interest | 1.02B | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Other Adjustments, Amount | 187.00M | 2025-01-01 → 2025-12-31 |
| Litigation Settlement, Expense | 137.00M | 2025-01-01 → 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, Year One | 345.00M | as of 2025-12-31 |
| Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Two | 341.00M | as of 2025-12-31 |
| Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Three | 337.00M | as of 2025-12-31 |
| Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Four | 335.00M | as of 2025-12-31 |
| Derivative Asset, Fair Value, Gross Liability | 258.43B | as of 2025-12-31 |
| Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Five | 331.00M | as of 2025-12-31 |
| Derivative Liability, Fair Value, Gross Asset | 258.43B | as of 2025-12-31 |
| Derivative Liability, Not Subject to Master Netting Arrangement | 5.34B | as of 2025-12-31 |
| Derivative Liability, Notional Amount | 16.65T | as of 2025-12-31 |
| Derivative Asset, Notional Amount | 15.85T | as of 2025-12-31 |
| Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement | 348.15B | as of 2025-12-31 |
| Securities Sold under Agreements to Repurchase, Asset | 350.90B | as of 2025-12-31 |
| Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Cash | 72.41B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 4.00M | as of 2025-12-31 |
| Securities Sold under Agreements to Repurchase, Not Subject to Master Netting Arrangement | 5.37B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 2.27B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | 2.28B | as of 2025-12-31 |
| Securities Sold under Agreements to Repurchase, Amount Offset Against Collateral | 6.13B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 223.00M | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 2.28B | as of 2025-12-31 |
| Time Deposit Maturities, Year One | 44.38B | as of 2025-12-31 |
| Time Deposit Maturities, Year Two | 23.39B | as of 2025-12-31 |
| Time Deposit Maturities, Year Three | 13.67B | as of 2025-12-31 |
| Securities Loaned, Asset | 66.84B | as of 2025-12-31 |
| Time Deposit Maturities, Year Four | 9.57B | as of 2025-12-31 |
| Time Deposit Maturities, Year Five | 8.26B | as of 2025-12-31 |
| Time Deposit Maturities, after Year Five | 370.00M | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | 615.00M | as of 2025-12-31 |
| Securities Loaned, Collateral, Right to Reclaim Cash | 17.21B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 30.17B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Unrealized Loss Position | 30.79B | as of 2025-12-31 |
| Derivative Asset, Fair Value, Amount Offset Against Collateral | 21.69B | as of 2025-12-31 |
| Derivative Liability, Fair Value, Amount Offset Against Collateral | 34.07B | as of 2025-12-31 |
| Securities Loaned, Amount Offset Against Collateral | 97.00M | as of 2025-12-31 |
| Stock Repurchased During Period, Value | 4.58B | 2025-01-01 → 2025-12-31 |
| Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | 7.55B | as of 2025-12-31 |
| Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 79.00M | as of 2025-12-31 |
| Goodwill, Translation and Purchase Accounting Adjustments | 20.00M | 2025-01-01 → 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal | 230.00M | 2025-01-01 → 2025-12-31 |
| Fair Value, Option, Aggregate Differences, Loans and Long-term Receivables | 10.75B | as of 2025-12-31 |
| Cash Flows Between Transferor and Transferee, Proceeds from New Transfers | 52.87B | 2025-01-01 → 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff | 214.00M | 2025-01-01 → 2025-12-31 |
| Fair Value, Option, Loans Held as Assets, 90 Days or More Past Due | 124.00M | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery | 22.00M | 2025-01-01 → 2025-12-31 |
| Operating Lease, Cost | 831.00M | 2025-01-01 → 2025-12-31 |
| Cash Flows Between Transferor and Transferee, Receipts on Transferor's Interest in Transferred Financial Assets, Other | 11.52B | 2025-01-01 → 2025-12-31 |
| Fair Value, Option, Loans Held as Assets, Aggregate Amount in Nonaccrual Status | 1.24B | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffAfterRecovery | 192.00M | 2025-01-01 → 2025-12-31 |
| Goodwill, Impaired, Accumulated Impairment Loss | 700.00M | as of 2025-12-31 |
| Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits | 2.60B | as of 2025-12-31 |
| Variable Lease, Cost | 171.00M | 2025-01-01 → 2025-12-31 |
| Lease, Cost | 1.00B | 2025-01-01 → 2025-12-31 |
| Capital Accumulation Plans | 5.15B | as of 2025-12-31 |
| Fair Value, Option, Loans Held as Assets, Aggregate Difference | 8.15B | as of 2025-12-31 |
| Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Amortized Cost | 53.09B | as of 2025-12-31 |
| Right-of-Use Asset Obtained in Exchange for Operating Lease Liability | 645.00M | 2025-01-01 → 2025-12-31 |
| Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals | 802.00M | as of 2025-12-31 |
| Deferred Tax Assets, Tax Deferred Expense, Other | 142.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year One | 819.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Two | 853.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Three | 751.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Four | 664.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Five | 612.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, after Year Five | 2.34B | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid | 6.04B | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestModifiedPeriod | 1.20B | 2025-01-01 → 2025-12-31 |
| Derivative, Collateral, Right to Reclaim Securities | 7.96B | as of 2025-12-31 |
| Derivative Liability, Collateral, Right to Reclaim Cash, Offset | 47.69B | as of 2025-12-31 |
| Deferred Tax Assets, Gross | 5.47B | as of 2025-12-31 |
| Derivative, Collateral, Obligation to Return Securities | 15.10B | as of 2025-12-31 |
| Deferred Tax Assets, Valuation Allowance | 229.00M | as of 2025-12-31 |
| Derivative Asset, Collateral, Obligation to Return Cash, Offset | 38.55B | as of 2025-12-31 |
| Deferred Tax Assets, Net of Valuation Allowance | 5.25B | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, Undiscounted Excess Amount | 1.04B | as of 2025-12-31 |
| Deferred Tax Assets, Net | 2.24B | as of 2025-12-31 |
| Deferred Tax Liabilities, Property, Plant and Equipment | 1.16B | as of 2025-12-31 |
| Debt, Long-term and Short-term, Combined Amount | 348.94B | as of 2025-12-31 |
| Other Comprehensive Income (Loss), before Reclassifications, Net of Tax | 436.00M | 2025-01-01 → 2025-12-31 |
| Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | -83.00M | 2025-01-01 → 2025-12-31 |
| Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year | 88.00M | as of 2025-12-31 |
| Other Comprehensive Income (Loss), before Reclassifications, before Tax | 152.00M | 2025-01-01 → 2025-12-31 |
| Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | -114.00M | 2025-01-01 → 2025-12-31 |
| Deferred Tax Liabilities, Goodwill and Intangible Assets | 1.84B | as of 2025-12-31 |
| Deferred Tax Liabilities, Net | 3.00B | as of 2025-12-31 |
| Undistributed Earnings of Foreign Subsidiaries | 490.00M | as of 2025-12-31 |
| Hedged Asset, Fair Value Hedge, Last-of-Layer, Cumulative Increase (Decrease) | 2.00M | as of 2025-12-31 |
| HedgedAssetFairValueHedgePortfolioLayerMethodCumulativeIncreaseDecreaseExcludedFromAmortizedCost | 703.00M | as of 2025-12-31 |
| BeneficialInterestSecuredByPrepayableFinancialInstrumentsLastOfLayerAmortizedCost | 589.00M | as of 2025-12-31 |
| Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | 9.71B | as of 2025-12-31 |
| Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months | -68.00M | 2025-01-01 → 2025-12-31 |
| Other Commitment, to be Paid, Year One | 200.93B | as of 2025-12-31 |
| Other Commitment, to be Paid, Year Two and Three | 62.73B | as of 2025-12-31 |
| Other Commitment, to be Paid, Year Four and Five | 90.19B | as of 2025-12-31 |
| Finite-lived Intangible Assets Acquired | 1.00M | 2025-01-01 → 2025-12-31 |
| Other Commitment, to be Paid, after Year Five | 13.25B | as of 2025-12-31 |
| Other Commitment | 367.09B | as of 2025-12-31 |
| Customer Securities for which Entity has Right to Sell or Repledge, Fair Value | 1.19T | as of 2025-12-31 |
| Customer Securities for which Entity has Right to Sell or Repledge, Fair Value of Securities Sold or Repledged | 900.28B | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year One | 26.23B | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Two | 39.62B | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Three | 44.76B | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Four | 36.51B | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Five | 30.92B | as of 2025-12-31 |
| Long-Term Debt, Maturity, after Year Five | 163.64B | as of 2025-12-31 |
| Off-Balance Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) | 119.00M | 2025-01-01 → 2025-12-31 |
| Other Comprehensive Income (Loss) before Reclassifications, Tax | -284.00M | 2025-01-01 → 2025-12-31 |
| Reclassification from AOCI, Current Period, Tax | -31.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits | 1.52B | as of 2025-12-31 |
| Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions | 78.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions | 30.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions | 211.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities | 2.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations | 44.00M | 2025-01-01 → 2025-12-31 |
| Financing Receivable, Held-for-Sale | 9.37B | as of 2025-12-31 |
| Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 1.35B | as of 2025-12-31 |
| Financing Receivable, Held-for-Sale, Not Part of Disposal Group, after Valuation Allowance | 9.37B | as of 2025-12-31 |
| Amount of Restricted Net Assets for Consolidated and Unconsolidated Subsidiaries | 59.98B | as of 2025-12-31 |
| Other Receivables | 114.72B | as of 2025-12-31 |
| FinancingReceivableYearOneOriginatedCurrentFiscalYearWriteoff | 10.00M | 2025-01-01 → 2025-12-31 |
| FinancingReceivableYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteoff | 13.00M | 2025-01-01 → 2025-12-31 |
| FinancingReceivableYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteoff | 123.00M | 2025-01-01 → 2025-12-31 |
| FinancingReceivableOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteoff | 46.00M | 2025-01-01 → 2025-12-31 |
| FinancingReceivableRevolvingWriteoff | 22.00M | 2025-01-01 → 2025-12-31 |
| Banking Regulation, Tier One Risk-Based Capital, Actual | 92.73B | as of 2025-12-31 |
| Banking Regulation, Common Equity Tier One Risk-Based Capital, Actual | 83.15B | as of 2025-12-31 |
| Banking Regulation, Total Capital, Actual | 103.45B | as of 2025-12-31 |
| Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments | 918.00M | as of 2025-12-31 |
| Banking Regulation, Risk-Weighted Assets, Actual | 552.51B | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestNonaccrualNoAllowance | 180.00M | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestNonaccrual | 1.15B | as of 2025-12-31 |
| Derivative, Net Liability Position, Aggregate Fair Value | 26.02B | as of 2025-12-31 |
| Collateral Already Posted, Aggregate Fair Value | 20.15B | as of 2025-12-31 |
| Securities Loaned and Securities Sold under Agreement to Repurchase, Gross Including Not Subject to Master Netting Arrangement | 513.60B | as of 2025-12-31 |
| Securities Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement | 429.44B | as of 2025-12-31 |
| Securities Loaned, Gross Including Not Subject to Master Netting Arrangement | 84.16B | as of 2025-12-31 |