| Deposits swept from brokerage accounts | $192.2B | $192.8B | $210.6B | $203.9B | $200.3B | $209.2B | $232.4B | $228.5B |
| Fair Value of Securities Received as Collateral that Can be Resold or Repledged | $99.5B | $101.3B | $116.3B | $115.8B | $115.6B | $134.7B | $155.5B | $174.9B |
| Debt Securities, Held-to-Maturity, Amortized Cost Excluding Accrued Interest, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date | $153.2B | $149.9B | — | $143.8B | $139.7B | $136.7B | — | $131.7B |
| Total Collateral Pledged to Third Parties | $30.4B | $41.2B | $42.1B | $44.0B | $56.7B | $75.9B | $79.3B | $91.7B |
| After 10 years | $104.3B | $101.1B | — | $96.0B | $92.1B | $88.3B | — | $81.1B |
| Ending IDA Balance | $84.5B | $84.0B | $87.6B | $83.7B | $82.2B | $78.6B | $76.3B | $73.6B |
| Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost | $101.9B | $95.9B | — | $80.5B | $72.6B | $66.7B | — | $65.0B |
| Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, after Allowance for Credit Loss | $101.9B | $95.9B | $89.7B | $80.5B | $72.6B | $66.7B | $66.2B | $65.0B |
| Estimated Fair Value | $93.6B | $90.0B | $83.0B | $74.8B | $67.6B | $62.3B | $62.4B | $61.1B |
| Debt Securities, Available-for-Sale, Unrealized Loss Position | $93.3B | $88.5B | $81.5B | $72.6B | $66.6B | $60.6B | $57.9B | $60.6B |
| Fixed-Rate Obligation IDA Balance | $74.8B | $70.2B | $66.6B | $64.9B | $63.7B | $59.7B | $59.6B | $59.6B |
| 12 months or more | $91.6B | $88.3B | $81.2B | $71.9B | $64.5B | $59.7B | $56.2B | $54.1B |
| Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed | — | — | — | — | — | — | $21.7B | $33.0B |
| Derivative Asset, Security Purchased under Agreement to Resell, and Security Borrowed, Subject to Master Netting Arrangement, before Offset | $10.7B | $14.9B | $10.8B | $14.9B | $21.2B | $24.6B | $21.7B | $33.0B |
| Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Collateral Right To Reclaim Cash | $13.5B | $21.2B | $17.8B | $19.5B | $22.2B | $25.2B | $26.2B | $28.9B |
| 1-5 years | $8.2B | $10.0B | — | $13.5B | $17.5B | $20.4B | — | $28.2B |
| Derivative Asset, Security Purchased under Agreement to Resell, and Security Borrowed, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash Not Offset | — | — | — | — | — | — | $18.6B | $27.3B |
| Gross Assets/Liabilities | $5.4B | $12.5B | $13.1B | $14.7B | $17.6B | $21.7B | $25.1B | $26.5B |
| Deposits Received For Securities Loaned At Carrying Value | — | — | $13.1B | $14.7B | $17.6B | $21.7B | $25.1B | $26.5B |
| Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 | $14.4B | $14.3B | — | $14.1B | $14.3B | $17.0B | — | $25.5B |
| Security Purchased under Agreement to Resell, Subject to Master Netting Arrangement, before Offset | $9.3B | $13.6B | $10.1B | $14.3B | $19.6B | $22.2B | $16.9B | $24.4B |
| Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 | $12.9B | $13.2B | — | $13.0B | $13.3B | $15.7B | — | $23.3B |
| 5-10 years | $38.7B | $37.0B | — | $32.8B | $29.7B | $27.4B | — | $21.7B |
| Long-term debt, gross | $22.5B | $22.5B | — | $21.5B | $20.2B | $20.2B | — | $20.6B |
| Fair value of securities pledged to counterparties | $3.5B | $10.6B | $11.8B | $13.5B | $15.7B | $19.4B | $21.1B | $20.6B |
| Long-Term Debt and Lease Obligation | $22.4B | $22.4B | $22.4B | $21.5B | $20.2B | $20.2B | $22.2B | $20.5B |
| Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five | $26.7B | $21.8B | — | $19.1B | $18.4B | $17.2B | — | $19.6B |
| Carrying values of hedged liabilities | — | — | — | — | — | — | $20.7B | $19.4B |
| Cash and investments segregated and on deposit for regulatory purposes | — | — | — | — | — | — | $23.6B | $18.9B |
| Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five | $24.9B | $20.7B | — | $18.1B | $17.3B | $16.2B | — | $18.6B |
| Checking accounts | — | — | — | — | — | — | $16.5B | $17.0B |
| Floating-Rate Obligation IDA Balance | $9.7B | $13.8B | $21.0B | $18.8B | $18.5B | $18.9B | $16.7B | $14.0B |
| Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10 | $44.6B | $41.9B | — | $36.5B | $32.7B | $26.0B | — | $12.8B |
| Other short-term borrowings | $7.5B | $5.1B | — | $6.9B | $8.5B | $5.5B | — | $12.5B |
| Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 | $39.8B | $38.5B | — | $33.2B | $29.9B | $23.9B | — | $12.2B |
| Fails to deliver | — | — | $2.4B | $2.9B | $4.3B | $4.7B | $7.2B | $11.8B |
| Carrying amount of hedged asset | — | — | $15.7B | $15.1B | $14.0B | $14.4B | $12.2B | $11.2B |
| Remaining unamortized loss on securities transferred to held to maturity, pretax | $13.9B | $13.3B | — | $12.2B | $11.7B | $11.1B | — | $10.1B |
| Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss | $14.6B | $11.2B | $14.0B | $11.8B | $11.1B | $10.1B | $9.6B | $9.9B |
| Deposits Paid for Securities Borrowed, at Carrying Value | — | — | $695.0M | $564.0M | $1.6B | $2.3B | $4.8B | $8.6B |
| Securities borrowed, gross assets recognized | $1.4B | $1.3B | $695.0M | $564.0M | $1.6B | $2.3B | $4.8B | $8.6B |
| Thereafter | $10.7B | $10.7B | — | $6.5B | $6.5B | $6.5B | — | $8.0B |
| Remaining unamortized loss on securities transferred to held to maturity, net of tax | $10.6B | $10.2B | — | $9.3B | $8.8B | $8.5B | — | $7.7B |
| Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One | $16.2B | $17.9B | — | $10.7B | $7.2B | $6.5B | — | $7.0B |
| Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One | $15.9B | $17.6B | — | $10.6B | $7.2B | $6.5B | — | $6.9B |
| Preferred stock, liquidation preference, value | $9.3B | $9.3B | $9.3B | $9.3B | $6.9B | $6.9B | $6.9B | $6.9B |
| Less than 12 months | $1.7B | $242.0M | $255.0M | $699.0M | $2.2B | $902.0M | $1.7B | $6.5B |
| Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Collateral Right To Reclaim Securities | $1.4B | $1.3B | $617.0M | $555.0M | $1.5B | $1.6B | $3.1B | $5.7B |
| 2029 | $3.5B | $3.5B | — | $2.0B | $2.0B | $2.0B | — | $4.2B |
| Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss | $8.4B | $5.9B | $6.8B | $5.7B | $5.0B | $4.4B | $3.9B | $3.9B |
| Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax | $8.3B | $5.9B | $6.7B | $5.6B | $5.0B | $4.4B | $3.9B | $3.9B |
| Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $8.3B | $5.9B | $6.8B | $5.7B | $5.0B | $4.4B | $3.9B | $3.8B |
| Savings and other | $4.1B | $4.0B | $4.0B | $3.8B | $3.7B | $3.6B | $3.6B | $3.6B |
| Financing Receivable, Commitments To Extend Credit And To Purchase | $2.7B | $2.9B | $2.4B | $2.7B | $2.8B | $3.0B | $2.7B | $3.6B |
| Repurchase agreements, Gross amounts not offset in the balance sheet, Cash collateral pledged | $9.0B | $8.1B | $5.5B | $5.5B | $6.0B | $4.0B | $1.3B | $3.5B |
| 2027 | $2.2B | $2.2B | — | $4.1B | $4.1B | $4.1B | — | $3.5B |
| Other financial assets | — | — | — | — | — | — | $3.2B | $3.1B |
| Receivables from clearing organizations | — | — | $1.7B | $2.3B | $2.6B | $2.3B | $2.3B | $3.1B |
| Remainder of 2026 | $12.0M | $6.0M | — | $1.3B | $12.0M | $5.0M | — | $2.5B |
| Remainder of Fiscal Year 2024 | $12.0M | $6.0M | — | $1.3B | $12.0M | $5.0M | — | $2.5B |
| Time certificates of deposit | $40.3B | $34.1B | $27.7B | $21.1B | $12.7B | $9.9B | $2.0B | $2.4B |
| 2028 | $4.1B | $4.1B | — | $3.5B | $3.5B | $3.5B | — | $2.0B |
| Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | $201.0M | $2.4B | $146.0M | $1.0B | $1.4B | $1.7B | $1.7B | $1.3B |
| Accounts receivable | $684.0M | $684.0M | $694.0M | $752.0M | $754.0M | $823.0M | $819.0M | $901.0M |
| Within 1 year | $1.9B | $1.7B | — | $1.6B | $394.0M | $592.0M | — | $583.0M |
| Broker-dealer repurchase agreements | — | — | — | — | — | — | $50.0M | $500.0M |
| 2030 | $2.0B | $2.0B | — | $4.2B | $4.2B | $4.2B | — | $500.0M |
| Accrued interest receivable | $507.0M | $464.0M | $455.0M | $418.0M | $388.0M | $372.0M | $386.0M | $398.0M |
| Payables to clearing organizations | — | — | $127.0M | $143.0M | $144.0M | $215.0M | $115.0M | $392.0M |
| Treasury stock, shares (in shares) | 245.7M | 244.6M | 243M | 258.2M | 259.7M | 287.5M | 315.9M | 336.1M |
| Accrued interest receivable | $167.0M | $173.0M | $171.0M | $180.0M | $193.0M | $211.0M | $223.0M | $234.0M |
| Net contract assets | $227.0M | $222.0M | $216.0M | $210.0M | $205.0M | $199.0M | $193.0M | $188.0M |
| Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Amount Offset Against Collateral | $515.0M | $551.0M | $656.0M | $645.0M | $427.0M | $626.0M | $926.0M | $146.0M |
| Security Loaned, Including Not Subject to Master Netting Arrangement, after Offset and Deduction | $515.0M | $551.0M | $656.0M | $645.0M | $427.0M | $626.0M | $925.0M | $146.0M |
| Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease), Excluding Discontinued Hedges | — | — | -$7.0M | — | — | $0.0 | $6.0M | -$101.0M |
| Cumulative amount of fair value hedging adjustment | — | — | — | — | — | — | $11.0M | -$97.0M |
| Payables for securities failed to receive | — | — | $104.0M | $108.0M | $175.0M | $262.0M | $91.0M | $80.0M |
| Debt Issuance Costs, Net | — | — | — | — | — | — | $82.0M | $76.0M |
| Hedged Asset Fair Value Hedge Cumulative Increase Decrease | — | — | -$292.0M | — | $115.0M | $113.0M | -$16.0M | -$38.0M |
| Debt premiums | $69.0M | $61.0M | $54.0M | $46.0M | $42.0M | $37.0M | $33.0M | $29.0M |
| Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $1.0M | $0.0 | $0.0 | $0.0 | $5.0M | $3.0M | $2.0M | $19.0M |
| Derivative Asset, Security Purchased under Agreement to Resell, and Security Borrowed, Including Not Subject to Master Netting Arrangement, after Offset and Deduction | — | — | — | — | — | — | $52.0M | $4.0M |
| Security Borrowed, Including Not Subject to Master Netting Arrangement, after Offset and Deduction | $0.0 | $1.0M | $1.0M | $0.0 | $0.0 | $14.0M | $51.0M | $4.0M |
| Cumulative Cost Basis | -$53.0M | -$14.0M | -$47.0M | -$28.0M | $9.0M | $8.0M | $2.0M | -$2.0M |
| Hedged Asset Fair Value Hedge Basis Adjustment | -$53.0M | -$14.0M | — | -$28.0M | $9.0M | $8.0M | — | -$2.0M |
| Unallocated portfolio layer method fair value basis adjustments, Gross Unrealized Losses | -$53.0M | -$14.0M | -$47.0M | -$28.0M | $9.0M | $8.0M | $2.0M | -$2.0M |
| Preferred Stock, Shares Issued | 1.4M | 1.4M | 1.4M | 1.4M | 1.4M | 1.4M | 1.4M | 1.4M |
| Preferred Stock, Shares Outstanding | 1.4M | 1.4M | 1.4M | 1.4M | 1.4M | 1.4M | 1.4M | 1.4M |
| Short-term debt, weighted average interest rate, at point in time | — | — | — | — | — | — | 4.1% | 4.0% |
| Weighted-Average Interest Rate on Time Deposits | 5.3% | 5.2% | 4.9% | 4.8% | 4.3% | 4.2% | 4.0% | 3.8% |
| Preferred Stock, Par or Stated Value Per Share | $0.01 | $0.01 | $0.01 | $0.01 | $0.01 | $0.01 | $0.01 | $0.01 |
| Basis Spread on Variable Rate Instruments | — | — | — | — | — | — | — | $0.0 |
| Gross Unrealized Gains | $0.0 | $2.0M | $1.0M | $1.0M | $2.0M | $3.0M | $3.0M | $0.0 |
| Available-for-sale securities, allowance for credit loss | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 |
| Derivative Asset, Security Purchased under Agreement to Resell, and Security Borrowed, Subject to Master Netting Arrangement, Liability Offset | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 |
| With an allowance | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 |
| Unallocated portfolio layer method fair value basis adjustments, Gross Unrealized Gains | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 |
| Securities Purchased Under Agreements To Resell Amount Offset Against Collateral | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 |
| Securities Purchased Under Agreements To Resell Collateral Obligation To Return Securities | — | — | — | — | — | — | $0.0 | $0.0 |
| Securities Sold Under Agreements To Repurchase Amount Offset Against Collateral | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 |
| Repurchase agreements, Gross amounts not offset in the balance sheet, Cash collateral pledged | — | — | — | — | — | — | $0.0 | $0.0 |
| Time Deposits, at or Above FDIC Insurance Limit | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 |
