| Current Federal Tax Expense (Benefit) | 1.90B | 2025-01-01 → 2025-12-31 |
| Current State and Local Tax Expense (Benefit) | 348.00M | 2025-01-01 → 2025-12-31 |
| Current Income Tax Expense (Benefit) | 2.25B | 2025-01-01 → 2025-12-31 |
| Deferred Federal Income Tax Expense (Benefit) | 318.00M | 2025-01-01 → 2025-12-31 |
| Deferred State and Local Income Tax Expense (Benefit) | 43.00M | 2025-01-01 → 2025-12-31 |
| Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization | 8.06B | as of 2025-12-31 |
| Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, Accumulated Depreciation and Amortization | 4.97B | as of 2025-12-31 |
| Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization | 3.09B | as of 2025-12-31 |
| Other Assets, Miscellaneous | 473.00M | as of 2025-12-31 |
| Dividends, Preferred Stock, Cash | 370.50M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount | 2.41B | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount | 305.00M | 2025-01-01 → 2025-12-31 |
| Share-based Payment Arrangement, Expense, Tax Benefit | 76.00M | 2025-01-01 → 2025-12-31 |
| Share-based Payment Arrangement, Exercise of Option, Tax Benefit | 32.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount | 30.00M | 2025-01-01 → 2025-12-31 |
| Securities Purchased under Agreements to Resell, Gross | 16.90B | as of 2025-12-31 |
| Securities Purchased under Agreements to Resell, Liability | 0 | as of 2025-12-31 |
| Securities Purchased under Agreements to Resell, Collateral, Obligation to Return Securities | 0 | as of 2025-12-31 |
| Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | 328.00M | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Credit, Other, Amount | 86.00M | 2025-01-01 → 2025-12-31 |
| Securities Purchased under Agreements to Resell, Collateral, Obligation to Return Cash | 16.90B | as of 2025-12-31 |
| Fair Value of Securities Received as Collateral that Can be Resold or Repledged | 155.53B | as of 2025-12-31 |
| Fair Value of Securities Received as Collateral that Have Been Resold or Repledged | 79.29B | as of 2025-12-31 |
| Securities Purchased under Agreements to Resell, Amount Offset Against Collateral | 0 | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount | 9.00M | 2025-01-01 → 2025-12-31 |
| Securities Borrowed, Gross | 4.80B | as of 2025-12-31 |
| Securities Borrowed, Liability | 0 | as of 2025-12-31 |
| Securities Borrowed, Collateral, Obligation to Return Securities | 3.07B | as of 2025-12-31 |
| Securities Borrowed, Collateral, Obligation to Return Cash | 1.68B | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Contingency, Amount | 7.00M | 2025-01-01 → 2025-12-31 |
| Dividends, Common Stock, Cash | 1.96B | 2025-01-01 → 2025-12-31 |
| Time Deposits, at or Above FDIC Insurance Limit | 0 | as of 2025-12-31 |
| Securities Borrowed, Amount Offset Against Collateral | 51.00M | as of 2025-12-31 |
| Financing Receivable, Accrued Interest, before Allowance for Credit Loss | 223.00M | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Realized Gain | 2.00M | 2025-01-01 → 2025-12-31 |
| Debt Securities, Available-for-sale, Realized Loss | 81.00M | 2025-01-01 → 2025-12-31 |
| Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Gross | 21.70B | as of 2025-12-31 |
| Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Liability | 0 | as of 2025-12-31 |
| Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Collateral, Obligation to Return Securities | 3.07B | as of 2025-12-31 |
| Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Collateral, Obligation to Return Cash | 18.58B | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterest90DaysOrMorePastDueStillAccruing | 0 | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Other Adjustments, Amount | -4.00M | 2025-01-01 → 2025-12-31 |
| Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed | 21.70B | as of 2025-12-31 |
| Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Amount Offset Against Collateral | 52.00M | as of 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, Year One | 508.00M | as of 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, Year Two | 508.00M | as of 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, Year Three | 507.00M | as of 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, Year Four | 507.00M | as of 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, Year Five | 507.00M | as of 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, after Year Five | 4.60B | as of 2025-12-31 |
| Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One | 6.26B | as of 2025-12-31 |
| Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five | 19.76B | as of 2025-12-31 |
| Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 | 21.99B | as of 2025-12-31 |
| Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10 | 18.22B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost | 66.22B | as of 2025-12-31 |
| Interest-bearing Domestic Deposit, Time Deposits | 2.00B | as of 2025-12-31 |
| Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One | 6.19B | as of 2025-12-31 |
| Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five | 18.84B | as of 2025-12-31 |
| Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 | 20.25B | as of 2025-12-31 |
| Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 | 17.07B | as of 2025-12-31 |
| Capitalized Contract Cost, Amortization | 111.00M | 2025-01-01 → 2025-12-31 |
| Securities Sold under Agreements to Repurchase, Gross | 1.30B | as of 2025-12-31 |
| Securities Sold under Agreements to Repurchase, Asset | 0 | as of 2025-12-31 |
| Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities | 0 | as of 2025-12-31 |
| Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Cash | 1.30B | as of 2025-12-31 |
| Investment Owned, at Fair Value | 3.16B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 2.00M | as of 2025-12-31 |
| Defined Benefit Plan, Benefit Obligation | 163.00M | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 3.87B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | 3.87B | as of 2025-12-31 |
| Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) | -12.00M | 2025-01-01 → 2025-12-31 |
| Securities Sold under Agreements to Repurchase, Amount Offset Against Collateral | 0 | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 3.00M | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 3.87B | as of 2025-12-31 |
| Securities Loaned, Gross | 25.13B | as of 2025-12-31 |
| Securities Loaned, Asset | 0 | as of 2025-12-31 |
| Securities Loaned, Collateral, Right to Reclaim Securities | 3.07B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | 1.74B | as of 2025-12-31 |
| Securities Loaned, Collateral, Right to Reclaim Cash | 21.14B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 56.20B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Unrealized Loss Position | 57.93B | as of 2025-12-31 |
| Deferred Tax Assets, Operating Loss Carryforwards | 21.00M | as of 2025-12-31 |
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value | 567.00M | as of 2025-12-31 |
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value | 178.00M | 2025-01-01 → 2025-12-31 |
| Securities Loaned, Amount Offset Against Collateral | 925.00M | as of 2025-12-31 |
| Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | 9.65B | as of 2025-12-31 |
| Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 1.73B | as of 2025-12-31 |
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value | 567.00M | as of 2025-12-31 |
| Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Gross | 30.23B | as of 2025-12-31 |
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value | 496.00M | as of 2025-12-31 |
| Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Asset | 0 | as of 2025-12-31 |
| Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Collateral, Right to Reclaim Securities | 3.07B | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal | 15.00M | 2025-01-01 → 2025-12-31 |
| Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Collateral, Right to Reclaim Cash | 26.24B | as of 2025-12-31 |
| Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Severance Payments | 268.00M | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff | 0 | 2025-01-01 → 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery | 0 | 2025-01-01 → 2025-12-31 |
| Operating Lease, Cost | 215.00M | 2025-01-01 → 2025-12-31 |
| Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned | 30.23B | as of 2025-12-31 |
| Variable Lease, Cost | 45.00M | 2025-01-01 → 2025-12-31 |
| Right-of-Use Asset Obtained in Exchange for Finance Lease Liability | 11.00M | 2025-01-01 → 2025-12-31 |
| Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Amount Offset Against Collateral | 926.00M | as of 2025-12-31 |
| Right-of-Use Asset Obtained in Exchange for Operating Lease Liability | 322.00M | 2025-01-01 → 2025-12-31 |
| DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateYearOne | 468.00M | as of 2025-12-31 |
| DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateAfterYearOneThroughFive | 24.59B | as of 2025-12-31 |
| DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateAfterYear5Through10 | 24.44B | as of 2025-12-31 |
| DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateAfterYear10 | 84.48B | as of 2025-12-31 |
| DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDate | 133.97B | as of 2025-12-31 |
| Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, Year One | 467.00M | as of 2025-12-31 |
| Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five | 23.96B | as of 2025-12-31 |
| Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 | 23.79B | as of 2025-12-31 |
| Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 | 77.83B | as of 2025-12-31 |
| Deferred Tax Assets, Unrealized Losses on Available-for-Sale Securities, Gross | 3.43B | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year One | 224.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Two | 223.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Three | 169.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Four | 107.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Five | 82.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, after Year Five | 214.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid | 1.02B | as of 2025-12-31 |
| Deferred Tax Assets, Other | 195.00M | as of 2025-12-31 |
| Deferred Tax Assets, Gross | 4.19B | as of 2025-12-31 |
| Deferred Tax Assets, Valuation Allowance | 27.00M | as of 2025-12-31 |
| Deferred Tax Assets, Net of Valuation Allowance | 4.17B | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, Undiscounted Excess Amount | 116.00M | as of 2025-12-31 |
| Deferred Tax Liabilities, Gross | 2.20B | as of 2025-12-31 |
| Deferred Tax Assets, Net | 1.97B | as of 2025-12-31 |
| Long-term Debt, Gross | 22.24B | as of 2025-12-31 |
| Deferred Tax Liabilities, Deferred Expense, Capitalized Software | 141.00M | as of 2025-12-31 |
| Deferred Tax Liabilities, Deferred Expense, Other Capitalized Costs | 138.00M | as of 2025-12-31 |
| Deferred Tax Liabilities, Other | 87.00M | as of 2025-12-31 |
| Hedged Asset, Fair Value Hedge | 12.25B | as of 2025-12-31 |
| Hedged Liability, Fair Value Hedge | 20.73B | as of 2025-12-31 |
| Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) | 11.00M | as of 2025-12-31 |
| Hedged Asset, Fair Value Hedge, Last-of-Layer, Cumulative Increase (Decrease) | 2.00M | as of 2025-12-31 |
| HedgedAssetFairValueHedgePortfolioLayerMethodCumulativeIncreaseDecreaseExcludedFromAmortizedCost | -2.00M | as of 2025-12-31 |
| Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months | 13.00M | 2025-01-01 → 2025-12-31 |
| Long-Term Debt, Maturity, Year One | 4.12B | as of 2025-12-31 |
| Defined Contribution Plan, Cost | 238.00M | 2025-01-01 → 2025-12-31 |
| Long-Term Debt, Maturity, Year Two | 3.46B | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Three | 1.95B | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Four | 4.20B | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Five | 500.00M | as of 2025-12-31 |
| Long-Term Debt, Maturity, after Year Five | 8.00B | as of 2025-12-31 |
| Debt Instrument, Unamortized Premium | 33.00M | as of 2025-12-31 |
| DebtSecuritiesAvailableForSaleExcludingAccruedInterestAllowanceForCreditLossWriteoff | 0 | 2025-01-01 → 2025-12-31 |
| Debt Issuance Costs, Net | 82.00M | as of 2025-12-31 |
| Unrecognized Tax Benefits | 458.00M | 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 | 56.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions | 88.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities | 13.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations | 12.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 386.00M | as of 2025-12-31 |
| Advances from Federal Home Loan Banks | 1.85B | as of 2025-12-31 |
| APIC, Share-based Payment Arrangement, Increase for Cost Recognition | 289.00M | 2025-01-01 → 2025-12-31 |