| Current Federal Tax Expense (Benefit) | 4.20B | 2025-01-01 → 2025-12-31 |
| Current State and Local Tax Expense (Benefit) | 442.00M | 2025-01-01 → 2025-12-31 |
| Current Foreign Tax Expense (Benefit) | 2.25B | 2025-01-01 → 2025-12-31 |
| Current Income Tax Expense (Benefit) | 6.89B | 2025-01-01 → 2025-12-31 |
| Deferred Federal Income Tax Expense (Benefit) | -114.00M | 2025-01-01 → 2025-12-31 |
| Cash Segregated under Other Regulations | 4.40B | as of 2025-12-31 |
| Deferred State and Local Income Tax Expense (Benefit) | 239.00M | 2025-01-01 → 2025-12-31 |
| Securities Segregated under Other Regulations | 13.20B | as of 2025-12-31 |
| Deferred Foreign Income Tax Expense (Benefit) | 170.00M | 2025-01-01 → 2025-12-31 |
| Loans Receivable, Fair Value Disclosure | 3.50B | as of 2025-12-31 |
| Share-based Payment Arrangement, Expense | 4.20B | 2025-01-01 → 2025-12-31 |
| Loans Held-for-sale, Fair Value Disclosure | 2.27B | as of 2025-12-31 |
| Other Assets, Fair Value Disclosure | 9.06B | as of 2025-12-31 |
| Dividends, Preferred Stock, Cash | 1.45B | 2025-01-01 → 2025-12-31 |
| Derivative Asset, Not Subject to Master Netting Arrangement | 3.30B | as of 2025-12-31 |
| Federal Funds Purchased and Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure | 223.07B | as of 2025-12-31 |
| Debt Securities, Trading, and Equity Securities, FV-NI | 366.95B | as of 2025-12-31 |
| Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement | 292.20B | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount | 7.92B | 2025-01-01 → 2025-12-31 |
| Equity Securities, FV-NI, Cost | 479.00M | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount | 726.00M | 2025-01-01 → 2025-12-31 |
| Share-based Payment Arrangement, Expense, Tax Benefit | 1.00B | 2025-01-01 → 2025-12-31 |
| Debt Securities, Trading, Restricted | 185.87B | as of 2025-12-31 |
| EffectiveIncomeTaxRateReconciliationGiltiAmount | 550.00M | 2025-01-01 → 2025-12-31 |
| EffectiveIncomeTaxRateReconciliationCrossBorderOtherAmount | -205.00M | 2025-01-01 → 2025-12-31 |
| Long-term Debt, Fair Value | 72.59B | as of 2025-12-31 |
| Short-term Debt, Fair Value | 8.05B | as of 2025-12-31 |
| Preferred Stock, Including Additional Paid in Capital | 25.99B | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Credit, Other, Amount | 216.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount | 419.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Contingency, Amount | -187.00M | 2025-01-01 → 2025-12-31 |
| Dividends, Common Stock, Cash | 8.08B | 2025-01-01 → 2025-12-31 |
| Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities | 223.00M | 2025-01-01 → 2025-12-31 |
| Accrued Liabilities and Other Liabilities | 231.07B | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount | 405.00M | 2025-01-01 → 2025-12-31 |
| Common Stocks, Including Additional Paid in Capital | 26.08B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Realized Gain | 66.00M | 2025-01-01 → 2025-12-31 |
| Debt Securities, Available-for-sale, Realized Loss | 86.00M | 2025-01-01 → 2025-12-31 |
| Debt Securities, Available-for-sale, Realized Gain (Loss) | -20.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount | 149.00M | 2025-01-01 → 2025-12-31 |
| FinancingReceivableExcludingAccruedInterest90DaysOrMorePastDueStillAccruing | 2.12B | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Other Adjustments, Amount | -8.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount | -215.00M | 2025-01-01 → 2025-12-31 |
| Litigation Settlement, Expense | 422.00M | 2025-01-01 → 2025-12-31 |
| Loss Contingency Accrual | 244.00M | as of 2025-12-31 |
| Loss Contingency Accrual, Period Increase (Decrease) | -323.00M | 2025-01-01 → 2025-12-31 |
| Derivative Asset, Fair Value, Gross Liability | 224.10B | as of 2025-12-31 |
| Derivative Asset, Fair Value, Amount Not Offset Against Collateral | 37.60B | as of 2025-12-31 |
| Derivative Liability, Fair Value, Gross Asset | 224.10B | as of 2025-12-31 |
| Net Income (Loss) Available to Common Stockholders, Diluted | 29.28B | 2025-01-01 → 2025-12-31 |
| Derivative Liability, Fair Value, Amount Not Offset Against Collateral | 36.90B | as of 2025-12-31 |
| Derivative Liability, Not Subject to Master Netting Arrangement | 5.20B | as of 2025-12-31 |
| Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement | 297.60B | as of 2025-12-31 |
| Defined Benefit Plan, Plan Assets, Amount | 19.97B | 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 | 2.55B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | 2.60B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 790.00M | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 2.60B | as of 2025-12-31 |
| Time Deposit Maturities, Year One | 204.38B | as of 2025-12-31 |
| Time Deposit Maturities, Year Two | 4.01B | as of 2025-12-31 |
| Time Deposit Maturities, Year Three | 198.00M | as of 2025-12-31 |
| Time Deposit Maturities, Year Four | 100.00M | as of 2025-12-31 |
| Time Deposit Maturities, Year Five | 3.76B | as of 2025-12-31 |
| Time Deposit Maturities, after Year Five | 85.00M | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | 30.63B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 101.20B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Unrealized Loss Position | 131.83B | as of 2025-12-31 |
| Derivative Asset, Fair Value, Amount Offset Against Collateral | 20.40B | as of 2025-12-31 |
| Stock Issued During Period, Value, New Issues | 5.49B | 2025-01-01 → 2025-12-31 |
| Derivative Liability, Fair Value, Amount Offset Against Collateral | 25.40B | as of 2025-12-31 |
| Derivative Credit Risk Valuation Adjustment, Derivative Assets | 336.00M | as of 2025-12-31 |
| Deferred Tax Assets, Tax Credit Carryforwards, General Business | 3.92B | as of 2025-12-31 |
| Derivative Credit Risk Valuation Adjustment, Derivative Liabilities | 270.00M | as of 2025-12-31 |
| Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Actual Return (Loss) on Plan Assets Still Held | 5.00M | 2025-01-01 → 2025-12-31 |
| Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | 80.26B | as of 2025-12-31 |
| Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 2.00M | as of 2025-12-31 |
| Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase for Purchase | 14.00M | 2025-01-01 → 2025-12-31 |
| Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Period Increase (Decrease) | 19.00M | 2025-01-01 → 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal | 5.59B | 2025-01-01 → 2025-12-31 |
| Unrecorded Unconditional Purchase Obligation | 594.00M | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff | 6.85B | 2025-01-01 → 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery | 1.22B | 2025-01-01 → 2025-12-31 |
| Operating Lease, Cost | 1.95B | 2025-01-01 → 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffAfterRecovery | 5.63B | 2025-01-01 → 2025-12-31 |
| Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits | 1.81B | as of 2025-12-31 |
| Variable Lease, Cost | 561.00M | 2025-01-01 → 2025-12-31 |
| Lease, Cost | 2.51B | 2025-01-01 → 2025-12-31 |
| Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Provision for Loan Losses | 3.42B | as of 2025-12-31 |
| Fair Value, Option, Changes in Fair Value, Gain (Loss) | 547.00M | 2025-01-01 → 2025-12-31 |
| Right-of-Use Asset Obtained in Exchange for Operating Lease Liability | 222.00M | 2025-01-01 → 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossPeriodIncreaseDecrease | -37.00M | 2025-01-01 → 2025-12-31 |
| DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateYearOne | 502.00M | as of 2025-12-31 |
| DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateAfterYearOneThroughFive | 69.77B | as of 2025-12-31 |
| DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateAfterYear5Through10 | 39.83B | as of 2025-12-31 |
| DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateAfterYear10 | 332.33B | as of 2025-12-31 |
| Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities | 1.03B | as of 2025-12-31 |
| Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax | -5.63B | as of 2025-12-31 |
| Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax | 39.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year One | 1.74B | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Two | 1.61B | as of 2025-12-31 |
| Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax | 5.67B | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Three | 1.37B | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Four | 1.07B | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Five | 891.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, after Year Five | 3.71B | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid | 10.39B | as of 2025-12-31 |
| Deferred Tax Assets, Other | 2.47B | as of 2025-12-31 |
| Derivative, Collateral, Right to Reclaim Securities | 16.70B | as of 2025-12-31 |
| Derivative Liability, Collateral, Right to Reclaim Cash, Offset | 31.40B | as of 2025-12-31 |
| Deferred Tax Assets, Gross | 24.18B | as of 2025-12-31 |
| Derivative, Collateral, Obligation to Return Securities | 20.50B | as of 2025-12-31 |
| Deferred Tax Assets, Valuation Allowance | 2.31B | as of 2025-12-31 |
| Derivative Asset, Collateral, Obligation to Return Cash, Offset | 27.20B | as of 2025-12-31 |
| Deferred Tax Assets, Net of Valuation Allowance | 21.87B | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, Undiscounted Excess Amount | 1.31B | as of 2025-12-31 |
| Deferred Tax Liabilities, Gross | 6.87B | as of 2025-12-31 |
| Deferred Tax Assets, Net | 15.00B | as of 2025-12-31 |
| Sales-type and Direct Financing Leases, Lease Receivable | 19.20B | as of 2025-12-31 |
| Nonfinancial Liabilities Fair Value Disclosure | 9.00B | as of 2025-12-31 |
| Deferred Tax Liabilities, Leasing Arrangements | 3.25B | as of 2025-12-31 |
| Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments | -4.87B | 2025-01-01 → 2025-12-31 |
| Deferred Tax Liabilities, Other | 1.75B | as of 2025-12-31 |
| Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge | 4.76B | 2025-01-01 → 2025-12-31 |
| Hedged Liability, Fair Value Hedge | 175.69B | as of 2025-12-31 |
| Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) | -792.00M | as of 2025-12-31 |
| Hedged Asset, Fair Value Hedge, Last-of-Layer, Cumulative Increase (Decrease) | -46.00M | as of 2025-12-31 |
| Prepayable Financial Asset Closed Portfolio, Last-of-Layer, Amortized Cost | 35.80B | as of 2025-12-31 |
| Securities Received as Collateral, Amount Repledged and Sold | 1.00T | 2025-01-01 → 2025-12-31 |
| Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months | -2.20B | 2025-01-01 → 2025-12-31 |
| Gain (Loss) from Components Excluded from Assessment of Cash Flow Hedge Effectiveness, Net | 184.00M | 2025-01-01 → 2025-12-31 |
| Long-Term Debt, Maturity, Year One | 41.71B | as of 2025-12-31 |
| Defined Contribution Plan, Cost | 1.30B | 2025-01-01 → 2025-12-31 |
| Long-Term Debt, Maturity, Year Two | 41.23B | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Three | 40.52B | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Four | 31.44B | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Five | 15.68B | as of 2025-12-31 |
| Long-Term Debt, Maturity, after Year Five | 147.23B | as of 2025-12-31 |
| Off-Balance Sheet, Credit Loss, Liability | 1.18B | as of 2025-12-31 |
| Off-Balance Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) | 80.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits | 483.00M | as of 2025-12-31 |
| Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions | 24.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions | 214.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions | 54.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities | 46.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations | 19.00M | 2025-01-01 → 2025-12-31 |
| Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year One | 7.08B | as of 2025-12-31 |
| Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year Two | 5.80B | as of 2025-12-31 |
| Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year Three | 5.01B | as of 2025-12-31 |
| Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year Four | 2.02B | as of 2025-12-31 |
| Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year Five | 2.17B | as of 2025-12-31 |
| Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, after Year Five | 2.42B | as of 2025-12-31 |
| Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received | 24.52B | as of 2025-12-31 |
| Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 415.00M | as of 2025-12-31 |
| Sales-type and Direct Financing Leases, Lease Receivable, Undiscounted Excess Amount | 5.32B | as of 2025-12-31 |
| Lessor, Operating Lease, Payment to be Received, Year One | 593.00M | as of 2025-12-31 |
| Lessor, Operating Lease, Payment to be Received, Year Two | 512.00M | as of 2025-12-31 |
| Lessor, Operating Lease, Payment to be Received, Year Three | 425.00M | as of 2025-12-31 |
| Lessor, Operating Lease, Payment to be Received, Year Four | 303.00M | as of 2025-12-31 |
| Lessor, Operating Lease, Payment to be Received, Year Five | 203.00M | as of 2025-12-31 |
| Lessor, Operating Lease, Payment to be Received, after Year Five | 216.00M | as of 2025-12-31 |
| Lessor, Operating Lease, Payments to be Received | 2.25B | as of 2025-12-31 |
| Income Tax Examination, Penalties and Interest Expense | -26.00M | 2025-01-01 → 2025-12-31 |
| Income Tax Examination, Penalties and Interest Accrued | 72.00M | as of 2025-12-31 |
| Other Receivables | 98.19B | as of 2025-12-31 |
| Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances | 7.90B | as of 2025-12-31 |
| Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | 50.00M | 2025-01-01 → 2025-12-31 |
| Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs | -1.31B | as of 2025-12-31 |
| Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings | 632.00M | 2025-01-01 → 2025-12-31 |
| Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss) | 0 | 2025-01-01 → 2025-12-31 |
| Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases | 1.31B | 2025-01-01 → 2025-12-31 |
| Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales | 1.86B | 2025-01-01 → 2025-12-31 |
| Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Issues | 0 | 2025-01-01 → 2025-12-31 |
| Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements | -191.00M | 2025-01-01 → 2025-12-31 |
| Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3 | -422.00M | 2025-01-01 → 2025-12-31 |
| Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3 | -791.00M | 2025-01-01 → 2025-12-31 |
| Fair Value, Net Derivative Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss) | -130.00M | 2025-01-01 → 2025-12-31 |
| Credit Derivative, Maximum Exposure, Undiscounted | 2.14B | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestNonaccrual | 5.80B | as of 2025-12-31 |
| Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement | 834.18B | as of 2025-12-31 |
| Securities Loaned, Including Not Subject to Master Netting Arrangement and Assets other than Securities Transferred | 129.74B | as of 2025-12-31 |
| Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement | 969.21B | as of 2025-12-31 |