| Life Insurance, Corporate or Bank Owned, Amount | 5.65B | as of 2025-12-31 |
| Current Federal Tax Expense (Benefit) | 654.00M | 2025-01-01 → 2025-12-31 |
| Current State and Local Tax Expense (Benefit) | 81.00M | 2025-01-01 → 2025-12-31 |
| Current Foreign Tax Expense (Benefit) | 641.00M | 2025-01-01 → 2025-12-31 |
| Current Income Tax Expense (Benefit) | 1.38B | 2025-01-01 → 2025-12-31 |
| Capitalized Computer Software, Net | 2.71B | as of 2025-12-31 |
| Deferred Federal Income Tax Expense (Benefit) | 92.00M | 2025-01-01 → 2025-12-31 |
| Deferred State and Local Income Tax Expense (Benefit) | 13.00M | 2025-01-01 → 2025-12-31 |
| Securities Segregated under Other Regulations | 3.00B | as of 2025-12-31 |
| Deferred Foreign Income Tax Expense (Benefit) | -6.00M | 2025-01-01 → 2025-12-31 |
| Federal Income Tax Expense (Benefit), Continuing Operations | 746.00M | 2025-01-01 → 2025-12-31 |
| State and Local Income Tax Expense (Benefit), Continuing Operations | 94.00M | 2025-01-01 → 2025-12-31 |
| Share-based Payment Arrangement, Expense | 1.00M | 2025-01-01 → 2025-12-31 |
| Foreign Income Tax Expense (Benefit), Continuing Operations | 635.00M | 2025-01-01 → 2025-12-31 |
| Other Assets, Miscellaneous | 1.10B | as of 2025-12-31 |
| Other Assets, Fair Value Disclosure | 1.67B | as of 2025-12-31 |
| DerivativeAssetFairValueAfterOffsetAndDeductionSubjectToMasterNettingArrangement | 714.00M | as of 2025-12-31 |
| Subordinated Debt Obligations, Fair Value Disclosure | 9.00M | as of 2025-12-31 |
| Derivative Asset, Not Subject to Master Netting Arrangement | 505.00M | as of 2025-12-31 |
| Dividends, Preferred Stock | 243.00M | 2025-01-01 → 2025-12-31 |
| Debt Securities, Trading, and Equity Securities, FV-NI | 14.28B | as of 2025-12-31 |
| Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement | 6.61B | as of 2025-12-31 |
| Participating Securities, Distributed and Undistributed Earnings (Loss), Basic | 0 | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount | 1.48B | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount | 104.00M | 2025-01-01 → 2025-12-31 |
| EffectiveIncomeTaxRateReconciliationCrossBorderTaxEffectAmount | 10.00M | 2025-01-01 → 2025-12-31 |
| Securities Purchased under Agreements to Resell, Gross | 281.36B | as of 2025-12-31 |
| Securities Purchased under Agreements to Resell, Liability | 254.53B | as of 2025-12-31 |
| Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount | 25.00M | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Amount | 101.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Credit, Other, Amount | 24.00M | 2025-01-01 → 2025-12-31 |
| Fair Value of Securities Received as Collateral that Have Been Resold or Repledged | 306.00B | as of 2025-12-31 |
| SecurityPurchasedUnderAgreementToResellAfterOffsetAndDeductionSubjectToMasterNettingArrangement | 22.00M | as of 2025-12-31 |
| Contract with Customer, Liability, Revenue Recognized | 114.00M | 2025-01-01 → 2025-12-31 |
| Derivative, Loss on Derivative | 0 | 2025-01-01 → 2025-12-31 |
| Derivative, Gain (Loss) on Derivative, Net | 1.00M | 2025-01-01 → 2025-12-31 |
| Affordable Housing Tax Credits and Other Tax Benefits, Amount | 682.00M | 2025-01-01 → 2025-12-31 |
| Amortization Method Qualified Affordable Housing Project Investments, Amortization | 590.00M | 2025-01-01 → 2025-12-31 |
| Equity Securities without Readily Determinable Fair Value, Amount | 438.00M | as of 2025-12-31 |
| Securities Borrowed, Gross | 26.73B | as of 2025-12-31 |
| Securities Borrowed, Liability | 8.67B | as of 2025-12-31 |
| SecurityBorrowedAfterOffsetAndDeductionSubjectToMasterNettingArrangement | 682.00M | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Contingency, Amount | -4.00M | 2025-01-01 → 2025-12-31 |
| Time Deposits, at or Above FDIC Insurance Limit | 2.20B | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount | 66.00M | 2025-01-01 → 2025-12-31 |
| Financing Receivable, Accrued Interest, before Allowance for Credit Loss | 286.00M | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Realized Gain | 19.00M | 2025-01-01 → 2025-12-31 |
| Debt Securities, Available-for-sale, Realized Loss | 99.00M | 2025-01-01 → 2025-12-31 |
| Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Gross | 314.71B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Realized Gain (Loss) | -80.00M | 2025-01-01 → 2025-12-31 |
| Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Liability | 268.42B | as of 2025-12-31 |
| Participating Securities, Distributed and Undistributed Earnings (Loss), Diluted | 0 | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount | -13.00M | 2025-01-01 → 2025-12-31 |
| DerivativeAssetSecurityPurchasedUnderAgreementToResellSecurityBorrowedAfterOffsetAndDeductionSubjectToMasterNettingArrangement | 1.92B | as of 2025-12-31 |
| Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed | 46.28B | as of 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, Year One | 37.00M | as of 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, Year Two | 31.00M | as of 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, Year Three | 27.00M | as of 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, Year Four | 24.00M | as of 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, Year Five | 19.00M | as of 2025-12-31 |
| Derivative Asset, Fair Value, Gross Liability | 5.22B | as of 2025-12-31 |
| Derivative Asset, Fair Value, Amount Not Offset Against Collateral | 885.00M | as of 2025-12-31 |
| Derivative Liability, Fair Value, Gross Asset | 3.83B | as of 2025-12-31 |
| Intangible Assets, Gross (Excluding Goodwill) | 4.19B | as of 2025-12-31 |
| Derivative Liability, Fair Value, Amount Not Offset Against Collateral | 1.98B | as of 2025-12-31 |
| DerivativeLiabilityFairValueAfterOffsetAndDeductionSubjectToMasterNettingArrangement | 1.85B | as of 2025-12-31 |
| Derivative Liability, Not Subject to Master Netting Arrangement | 651.00M | as of 2025-12-31 |
| Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One | 6.20B | as of 2025-12-31 |
| Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five | 50.76B | as of 2025-12-31 |
| Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 | 4.92B | as of 2025-12-31 |
| Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement | 6.46B | as of 2025-12-31 |
| Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 | 2.02B | as of 2025-12-31 |
| Securities Sold under Agreements to Repurchase, Gross | 269.35B | as of 2025-12-31 |
| Securities Sold under Agreements to Repurchase, Asset | 254.53B | as of 2025-12-31 |
| Noninterest-bearing Domestic Deposit, Demand | 59.98B | as of 2025-12-31 |
| SecuritySoldUnderAgreementToRepurchaseAfterOffsetAndDeductionSubjectToMasterNettingArrangement | 0 | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 55.00M | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 768.00M | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | 823.00M | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 507.00M | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 823.00M | as of 2025-12-31 |
| Time Deposit Maturities, Year One | 7.90B | as of 2025-12-31 |
| Time Deposit Maturities, Year Two | 966.00M | as of 2025-12-31 |
| Securities Loaned, Gross | 12.84B | as of 2025-12-31 |
| Time Deposit Maturities, Year Three | 702.00M | as of 2025-12-31 |
| Securities Loaned, Asset | 8.67B | as of 2025-12-31 |
| Time Deposit Maturities, Year Four | 524.00M | as of 2025-12-31 |
| Time Deposit Maturities, Year Five | 256.00M | as of 2025-12-31 |
| Time Deposit Maturities, after Year Five | 0 | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | 12.36B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 19.31B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Unrealized Loss Position | 31.67B | as of 2025-12-31 |
| SecurityLoanedAfterOffsetAndDeductionSubjectToMasterNettingArrangement | 167.00M | as of 2025-12-31 |
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value | 1.00M | as of 2025-12-31 |
| Derivative Asset, Fair Value, Amount Offset Against Collateral | 1.22B | as of 2025-12-31 |
| Derivative Liability, Fair Value, Amount Offset Against Collateral | 2.50B | as of 2025-12-31 |
| Deferred Tax Assets, Tax Credit Carryforwards, Foreign | 114.00M | as of 2025-12-31 |
| Stock Repurchased During Period, Value | 3.50B | 2025-01-01 → 2025-12-31 |
| Goodwill, Other Increase (Decrease) | -13.00M | 2025-01-01 → 2025-12-31 |
| Goodwill, Written off Related to Sale of Business Unit | 18.00M | 2025-01-01 → 2025-12-31 |
| Goodwill, Foreign Currency Translation Gain (Loss) | 200.00M | 2025-01-01 → 2025-12-31 |
| Securities Loaned, Fair Value of Collateral | 158.00M | as of 2025-12-31 |
| Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | 2.81B | as of 2025-12-31 |
| Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 95.00M | as of 2025-12-31 |
| Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Gross | 288.65B | as of 2025-12-31 |
| Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Asset | 267.03B | as of 2025-12-31 |
| Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Benefits | 279.00M | as of 2025-12-31 |
| Goodwill, Gross | 17.45B | as of 2025-12-31 |
| Operating Lease, Cost | 231.00M | 2025-01-01 → 2025-12-31 |
| Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned | 21.62B | as of 2025-12-31 |
| Goodwill, Impaired, Accumulated Impairment Loss | 680.00M | as of 2025-12-31 |
| Variable Lease, Cost | 43.00M | 2025-01-01 → 2025-12-31 |
| Lease, Cost | 245.00M | 2025-01-01 → 2025-12-31 |
| Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Provision for Loan Losses | 88.00M | as of 2025-12-31 |
| Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Amount Offset Against Collateral | 2.67B | as of 2025-12-31 |
| Right-of-Use Asset Obtained in Exchange for Operating Lease Liability | 239.00M | 2025-01-01 → 2025-12-31 |
| Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Loss Reserves | 152.00M | as of 2025-12-31 |
| DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateYearOne | 4.88B | as of 2025-12-31 |
| DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateAfterYearOneThroughFive | 11.41B | as of 2025-12-31 |
| DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateAfterYear5Through10 | 572.00M | as of 2025-12-31 |
| DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateAfterYear10 | 26.00M | as of 2025-12-31 |
| Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 30.00M | as of 2025-12-31 |
| Financing Receivable, Individually Evaluated for Impairment | 157.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year One | 214.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Two | 202.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Three | 186.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Four | 174.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Five | 152.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, after Year Five | 784.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid | 1.71B | as of 2025-12-31 |
| Deferred Tax Assets, Other | 43.00M | as of 2025-12-31 |
| Derivative Liability, Collateral, Right to Reclaim Cash, Offset | 714.00M | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestModifiedPast12Months | 0 | as of 2025-12-31 |
| Deferred Tax Assets, Valuation Allowance | 127.00M | as of 2025-12-31 |
| Derivative Asset, Collateral, Obligation to Return Cash, Offset | 2.11B | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, Undiscounted Excess Amount | 269.00M | as of 2025-12-31 |
| Debt Securities, Available-for-sale and Held-to-maturity | 150.52B | as of 2025-12-31 |
| Employee Stock Ownership Plan (ESOP), Deferred Shares, Fair Value | 314.00M | as of 2025-12-31 |
| DebtSecuritiesAvailableForSaleAndHeldToMaturityFairValue | 147.48B | as of 2025-12-31 |
| DebtSecuritiesAvailableForSaleAndHeldToMaturityAmortizedCostBeforeAllowanceForCreditLoss | 150.20B | as of 2025-12-31 |
| DebtSecuritiesAvailableForSaleAndHeldToMaturityAmortizedCostAfterAllowanceForCreditLoss | 150.20B | as of 2025-12-31 |
| Deferred Tax Liabilities, Investments | 159.00M | as of 2025-12-31 |
| Deferred Tax Liabilities, Investment in Noncontrolled Affiliates | 54.00M | as of 2025-12-31 |
| Other Liabilities, Fair Value Disclosure | 617.00M | as of 2025-12-31 |
| Deferred Tax Liabilities, Other | 215.00M | as of 2025-12-31 |
| Deferred Tax Liabilities, Net | 1.85B | as of 2025-12-31 |
| Undistributed Earnings of Foreign Subsidiaries | 1.60B | as of 2025-12-31 |
| Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Cumulative Amount | 102.00M | as of 2025-12-31 |
| Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Cumulative Amount | 368.00M | as of 2025-12-31 |
| Hedged Asset, Fair Value Hedge, Last-of-Layer, Cumulative Increase (Decrease) | 1.00M | as of 2025-12-31 |
| HedgedAssetFairValueHedgePortfolioLayerMethodCumulativeIncreaseDecreaseExcludedFromAmortizedCost | 1.00M | as of 2025-12-31 |
| Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Annual Amount | 47.00M | 2025-01-01 → 2025-12-31 |
| Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount | 32.00M | 2025-01-01 → 2025-12-31 |
| Customer Securities for which Entity has Right to Sell or Repledge, Fair Value | 349.00B | as of 2025-12-31 |
| Securities Purchased under Agreements to Resell, Allowance for Credit Loss | 0 | as of 2025-12-31 |
| Derivative Instruments in Hedges, Assets, at Fair Value | 358.00M | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year One | 2.70B | as of 2025-12-31 |
| Defined Contribution Plan, Cost | 263.00M | 2025-01-01 → 2025-12-31 |
| Long-Term Debt, Maturity, Year Two | 4.40B | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Three | 7.30B | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Four | 4.40B | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Five | 1.50B | as of 2025-12-31 |
| Off-Balance Sheet, Credit Loss, Liability | 74.00M | as of 2025-12-31 |
| Unrecognized Tax Benefits | 112.00M | as of 2025-12-31 |
| Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions | 15.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions | 5.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions | 14.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities | 8.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations | 13.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Interest on Income Taxes Expense | 5.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Interest on Income Taxes Accrued | 36.00M | as of 2025-12-31 |
| Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 112.00M | as of 2025-12-31 |
| Income (Loss) from Continuing Operations before Income Taxes, Domestic | 4.43B | 2025-01-01 → 2025-12-31 |
| Income (Loss) from Continuing Operations before Income Taxes, Foreign | 2.63B | 2025-01-01 → 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear | 15.86B | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear | 1.86B | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear | 1.70B | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear | 3.35B | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear | 2.59B | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear | 6.27B | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestRevolving | 46.00B | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestRevolvingConvertedToTermLoan | 175.00M | as of 2025-12-31 |
| Banking Regulation, Tier One Risk-Based Capital, Actual | 25.91B | as of 2025-12-31 |
| Banking Regulation, Common Equity Tier One Risk-Based Capital, Actual | 21.09B | as of 2025-12-31 |
| Derivative, Net Liability Position, Aggregate Fair Value | 381.00M | as of 2025-12-31 |
| Collateral Already Posted, Aggregate Fair Value | 1.01B | as of 2025-12-31 |
| Additional Collateral, Aggregate Fair Value | 76.00M | as of 2025-12-31 |
| Financing Receivable, Unamortized Loan Fee (Cost) | 86.00M | as of 2025-12-31 |
| Derivative Liability, Fair Value, Gross Liability | 5.81B | as of 2025-12-31 |
| Derivative Asset, Fair Value, Gross Asset | 6.11B | as of 2025-12-31 |
| Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement | 269.35B | as of 2025-12-31 |
| Securities Loaned, Including Not Subject to Master Netting Arrangement and Assets other than Securities Transferred | 12.84B | as of 2025-12-31 |
| Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement | 282.19B | as of 2025-12-31 |