| Current Federal Tax Expense (Benefit) | 481.00M | 2025-01-01 → 2025-12-31 |
| Current State and Local Tax Expense (Benefit) | 190.00M | 2025-01-01 → 2025-12-31 |
| Current Foreign Tax Expense (Benefit) | 2.00M | 2025-01-01 → 2025-12-31 |
| Current Income Tax Expense (Benefit) | 673.00M | 2025-01-01 → 2025-12-31 |
| Deferred Federal Income Tax Expense (Benefit) | -17.00M | 2025-01-01 → 2025-12-31 |
| Deferred State and Local Income Tax Expense (Benefit) | -1.00M | 2025-01-01 → 2025-12-31 |
| Deferred Foreign Income Tax Expense (Benefit) | 0 | 2025-01-01 → 2025-12-31 |
| Loans Receivable, Fair Value Disclosure | 356.00M | as of 2025-12-31 |
| FederalStateAndLocalIncomeTaxExpenseBenefitContinuingOperations | -7.00M | 2025-01-01 → 2025-12-31 |
| Share-based Payment Arrangement, Expense | 136.00M | 2025-01-01 → 2025-12-31 |
| Dividends, Preferred Stock, Cash | 146.00M | 2025-01-01 → 2025-12-31 |
| Derivative Asset, Not Subject to Master Netting Arrangement | 139.00M | as of 2025-12-31 |
| Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement | 163.00M | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount | 775.00M | 2025-01-01 → 2025-12-31 |
| Equity Securities, FV-NI, Cost | 736.00M | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount | 153.00M | 2025-01-01 → 2025-12-31 |
| Share-based Payment Arrangement, Expense, Tax Benefit | 30.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount | 1.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Amount | 36.00M | 2025-01-01 → 2025-12-31 |
| Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | 53.00M | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Credit, Other, Amount | 23.00M | 2025-01-01 → 2025-12-31 |
| Letters of Credit Outstanding, Amount | 2.32B | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount | 24.00M | 2025-01-01 → 2025-12-31 |
| Amortization Method Qualified Affordable Housing Project Investments, Amortization | 186.00M | 2025-01-01 → 2025-12-31 |
| Dividends, Common Stock, Cash | 900.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount | 48.00M | 2025-01-01 → 2025-12-31 |
| TimeDepositLiabilityAboveUsInsuranceLimit | 2.80B | as of 2025-12-31 |
| Financing Receivable, Accrued Interest, before Allowance for Credit Loss | 627.00M | as of 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Other Adjustments, Amount | -5.00M | 2025-01-01 → 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, Year One | 31.00M | as of 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, Year Two | 20.00M | as of 2025-12-31 |
| Loss Contingency Accrual | 22.00M | as of 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, Year Three | 11.00M | as of 2025-12-31 |
| Finite-Lived Intangible Asset, Expected Amortization, Year Four | 2.00M | as of 2025-12-31 |
| Revenue, Remaining Performance Obligation, Amount | 75.00M | as of 2025-12-31 |
| Loss Contingency Accrual, Period Increase (Decrease) | 37.00M | 2025-01-01 → 2025-12-31 |
| Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One | 3.08B | as of 2025-12-31 |
| Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five | 3.23B | as of 2025-12-31 |
| Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 | 0 | as of 2025-12-31 |
| Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10 | 0 | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost | 6.30B | as of 2025-12-31 |
| Derivative Asset, Fair Value, Gross Liability | 33.00M | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost | 16.69B | as of 2025-12-31 |
| Treasury Stock, Value, Acquired, Cost Method | 2.66B | 2025-01-01 → 2025-12-31 |
| Derivative Liability, Fair Value, Gross Asset | 33.00M | as of 2025-12-31 |
| Net Income (Loss) Available to Common Stockholders, Diluted | 2.70B | 2025-01-01 → 2025-12-31 |
| Derivative Liability, Not Subject to Master Netting Arrangement | 400.00M | as of 2025-12-31 |
| Derivative, Notional Amount | 31.00B | as of 2025-12-31 |
| Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One | 3.08B | as of 2025-12-31 |
| Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five | 3.26B | as of 2025-12-31 |
| Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 | 0 | as of 2025-12-31 |
| Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement | 413.00M | as of 2025-12-31 |
| Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 | 0 | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value | 6.34B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value | 16.86B | as of 2025-12-31 |
| Defined Benefit Plan, Plan Assets, Amount | 3.01B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 3.00M | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 59.00M | as of 2025-12-31 |
| Deposit Liabilities, Collateral Issued, Financial Instruments | 5.30B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 270.00M | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 62.00M | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | 662.00M | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 1.55B | as of 2025-12-31 |
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value | 32.58B | as of 2025-12-31 |
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value | 24.50B | as of 2025-12-31 |
| Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | 737.00M | as of 2025-12-31 |
| Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 22.00M | as of 2025-12-31 |
| Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Postretirement Benefits | 68.00M | as of 2025-12-31 |
| Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost | 49.00M | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal | 485.00M | 2025-01-01 → 2025-12-31 |
| Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation | 39.00M | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff | 746.00M | 2025-01-01 → 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery | 193.00M | 2025-01-01 → 2025-12-31 |
| Operating Lease, Cost | 151.00M | 2025-01-01 → 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffAfterRecovery | 553.00M | 2025-01-01 → 2025-12-31 |
| Debt Securities, Held-to-Maturity, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One | 408.00M | as of 2025-12-31 |
| Variable Lease, Cost | 5.00M | 2025-01-01 → 2025-12-31 |
| Debt Securities, Held-to-Maturity, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five | 377.00M | as of 2025-12-31 |
| Lease, Cost | 156.00M | 2025-01-01 → 2025-12-31 |
| Debt Securities, Held-to-Maturity, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 | 1.33B | as of 2025-12-31 |
| Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts | 681.00M | as of 2025-12-31 |
| Debt Securities, Held-to-Maturity, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10 | 464.00M | as of 2025-12-31 |
| Right-of-Use Asset Obtained in Exchange for Operating Lease Liability | 106.00M | 2025-01-01 → 2025-12-31 |
| Debt Securities, Held-to-maturity, Maturity, without Single Maturity Date, Amortized Cost | 9.86B | as of 2025-12-31 |
| Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Reclassification Adjustment, before Tax | -50.00M | 2025-01-01 → 2025-12-31 |
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested | 114.00M | 2025-01-01 → 2025-12-31 |
| Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, Year One | 405.00M | as of 2025-12-31 |
| Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five | 375.00M | as of 2025-12-31 |
| Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 | 1.31B | as of 2025-12-31 |
| Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 | 438.00M | as of 2025-12-31 |
| Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Fair Value | 2.53B | as of 2025-12-31 |
| Debt Securities, Held-to-maturity, Maturity, without Single Maturity Date, Fair Value | 9.18B | as of 2025-12-31 |
| Deferred Tax Assets, Property, Plant and Equipment | 30.00M | as of 2025-12-31 |
| Deferred Tax Assets, Derivative Instruments | 0 | as of 2025-12-31 |
| Deferred Tax Assets, Unrealized Losses on Available-for-Sale Securities, Gross | 0 | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year One | 153.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Two | 138.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Three | 115.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Four | 89.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, Year Five | 63.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid, after Year Five | 191.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, to be Paid | 749.00M | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestModifiedPeriod | 1.25B | 2025-01-01 → 2025-12-31 |
| Deferred Tax Assets, Other | 107.00M | as of 2025-12-31 |
| Derivative Liability, Collateral, Right to Reclaim Cash, Offset | -8.00M | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestModifiedPast12Months | 1.25B | as of 2025-12-31 |
| Deferred Tax Assets, Gross | 1.16B | as of 2025-12-31 |
| Derivative Asset, Collateral, Obligation to Return Cash, Offset | 49.00M | as of 2025-12-31 |
| Lessee, Operating Lease, Liability, Undiscounted Excess Amount | 97.00M | as of 2025-12-31 |
| Deferred Tax Liabilities, Gross | 767.00M | as of 2025-12-31 |
| Deferred Tax Assets, Net | 389.00M | as of 2025-12-31 |
| Debt Instrument, Face Amount | 1.73B | as of 2025-12-31 |
| Property Subject to or Available for Operating Lease, Net | 184.00M | as of 2025-12-31 |
| Deferred Tax Liabilities, Property, Plant and Equipment | 0 | as of 2025-12-31 |
| Deferred Tax Liabilities, Mortgage Servicing Rights | 23.00M | as of 2025-12-31 |
| Deferred Tax Liabilities, Derivatives | 23.00M | as of 2025-12-31 |
| Debt Securities, Unrealized Gain (Loss) | -799.00M | 2025-01-01 → 2025-12-31 |
| Deferred Tax Liabilities, Leasing Arrangements | 142.00M | as of 2025-12-31 |
| Debt and Equity Securities, Gain (Loss) | 2.00M | 2025-01-01 → 2025-12-31 |
| Deferred Tax Liabilities, Other | 70.00M | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year One | 15.00M | as of 2025-12-31 |
| Defined Contribution Plan, Cost | 107.00M | 2025-01-01 → 2025-12-31 |
| Long-Term Debt, Maturity, Year Two | 992.00M | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Three | 2.55B | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Four | 1.80B | as of 2025-12-31 |
| Long-Term Debt, Maturity, Year Five | 411.00M | as of 2025-12-31 |
| Long-Term Debt, Maturity, after Year Five | 5.14B | as of 2025-12-31 |
| Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss) | 90.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits | 45.00M | as of 2025-12-31 |
| Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions | 15.00M | 2025-01-01 → 2025-12-31 |
| Direct Financing Lease, Lease Receivable | 2.80B | as of 2025-12-31 |
| Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions | 6.00M | 2025-01-01 → 2025-12-31 |
| Direct Financing Lease, Unguaranteed Residual Asset | 316.00M | as of 2025-12-31 |
| Increase (Decrease) in Fair Value of Interest Rate Fair Value Hedging Instruments | -15.00M | 2025-01-01 → 2025-12-31 |
| Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year One | 965.00M | as of 2025-12-31 |
| Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year Two | 733.00M | as of 2025-12-31 |
| Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year Three | 513.00M | as of 2025-12-31 |
| Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year Four | 332.00M | as of 2025-12-31 |
| Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year Five | 145.00M | as of 2025-12-31 |
| Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, after Year Five | 110.00M | as of 2025-12-31 |
| Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received | 2.80B | as of 2025-12-31 |
| Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 38.00M | as of 2025-12-31 |
| Lessor, Operating Lease, Payment to be Received, Year One | 36.00M | as of 2025-12-31 |
| Lessor, Operating Lease, Payment to be Received, Year Two | 30.00M | as of 2025-12-31 |
| Lessor, Operating Lease, Payment to be Received, Year Three | 24.00M | as of 2025-12-31 |
| Lessor, Operating Lease, Payment to be Received, Year Four | 15.00M | as of 2025-12-31 |
| Lessor, Operating Lease, Payment to be Received, Year Five | 11.00M | as of 2025-12-31 |
| Lessor, Operating Lease, Payment to be Received, after Year Five | 12.00M | as of 2025-12-31 |
| Lessor, Operating Lease, Payments to be Received | 128.00M | as of 2025-12-31 |
| Pension and Other Postretirement Benefits Cost (Reversal of Cost) | 56.00M | 2025-01-01 → 2025-12-31 |
| Interest Receivable and Other Assets | 11.25B | as of 2025-12-31 |
| Leveraged Leases, Net Investment in Leveraged Leases Disclosure, Deferred Income | 367.00M | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear | 23.92B | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear | 14.45B | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear | 11.39B | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear | 14.17B | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear | 9.18B | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear | 28.81B | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYearWriteoff | 83.00M | 2025-01-01 → 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteoff | 94.00M | 2025-01-01 → 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteoff | 88.00M | 2025-01-01 → 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteoff | 91.00M | 2025-01-01 → 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteoff | 37.00M | 2025-01-01 → 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteoff | 116.00M | 2025-01-01 → 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestNonaccrualNoAllowance | 398.00M | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestNonaccrual | 1.25B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Amortized Cost | 22.99B | as of 2025-12-31 |
| Financing Receivable, Unamortized Loan Fee (Cost) and Purchase Premium (Discount) | 276.00M | as of 2025-12-31 |
| FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossFeeAndLoanInProcess | 138.70B | as of 2025-12-31 |
| Derivative Liability, Fair Value, Gross Liability | 454.00M | as of 2025-12-31 |
| Derivative Asset, Fair Value, Gross Asset | 245.00M | as of 2025-12-31 |
| Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 1.00M | as of 2025-12-31 |
| Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 736.00M | as of 2025-12-31 |
| Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value | 182.00M | as of 2025-12-31 |
| Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value | 10.38B | as of 2025-12-31 |