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FAIR VALUE (Tables) | 3 Months Ended
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Mar. 31, 2025
Fair Value Disclosures [Abstract] |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis | The following table presents assets and liabilities measured at fair value on a recurring basis: Assets and Liabilities Measured at Fair Value - Recurring Basis
dollars in millions | March 31, 2025 |
| Total |  | Level 1 |  | Level 2 |  | Level 3 |
Assets |  |  |  |  |  |  |  |
Investment securities available for sale |  |  |  |  |  |  |  |
U.S. Treasury | $ | 13,150 |  |  | $ | — |  |  | $ | 13,150 |  |  | $ | — |  |
Government agency | 69 |  |  | — |  |  | 69 |  |  | — |  |
Residential mortgage-backed securities | 16,605 |  |  | — |  |  | 16,605 |  |  | — |  |
Commercial mortgage-backed securities | 3,594 |  |  | — |  |  | 3,594 |  |  | — |  |
Corporate bonds | 465 |  |  | — |  |  | 297 |  |  | 168 |  |
Municipal bonds | 17 |  |  | — |  |  | 17 |  |  | — |  |
Total investment securities available for sale | $ | 33,900 |  |  | $ | — |  |  | $ | 33,732 |  |  | $ | 168 |  |
Marketable equity securities | 95 |  |  | 42 |  |  | 53 |  |  | — |  |
Loans held for sale | 70 |  |  | — |  |  | 70 |  |  | — |  |
Loans | 23 |  |  | — |  |  | 23 |  |  | — |  |
Derivative assets (1) |  |  |  |  |  |  |  |
Total qualifying hedge assets | $ | 1 |  |  | $ | — |  |  | $ | 1 |  |  | $ | — |  |
Interest rate contracts — non-qualifying hedges | $ | 428 |  |  | $ | — |  |  | $ | 425 |  |  | $ | 3 |  |
Foreign exchange contracts — non-qualifying hedges | 108 |  |  | — |  |  | 108 |  |  | — |  |
Other derivative contracts — non-qualifying hedges | 16 |  |  | — |  |  | — |  |  | 16 |  |
Total non-qualifying hedge assets | $ | 552 |  |  | $ | — |  |  | $ | 533 |  |  | $ | 19 |  |
Total derivative assets | $ | 553 |  |  | $ | — |  |  | $ | 534 |  |  | $ | 19 |  |
Liabilities |  |  |  |  |  |  |  |
Derivative liabilities (1) |  |  |  |  |  |  |  |
Interest rate contracts — qualifying hedges | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |
Interest rate contracts — non-qualifying hedges | $ | 433 |  |  | $ | — |  |  | $ | 433 |  |  | $ | — |  |
Foreign exchange contracts — non-qualifying hedges | 107 |  |  | — |  |  | 107 |  |  | — |  |
Other derivative contracts — non-qualifying hedges | 1 |  |  | — |  |  | — |  |  | 1 |  |
Total non-qualifying hedge liabilities | $ | 541 |  |  | $ | — |  |  | $ | 540 |  |  | $ | 1 |  |
Total derivative liabilities | $ | 541 |  |  | $ | — |  |  | $ | 540 |  |  | $ | 1 |  |
(1) Derivative fair values include accrued interest. |  |  |  |  |  |  |  |
dollars in millions | December 31, 2024 |
| Total |  | Level 1 |  | Level 2 |  | Level 3 |
Assets |  |  |  |  |  |  |  |
Investment securities available for sale |  |  |  |  |  |  |  |
U.S. Treasury | $ | 13,903 |  |  | $ | — |  |  | $ | 13,903 |  |  | $ | — |  |
Government agency | 77 |  |  | — |  |  | 77 |  |  | — |  |
Residential mortgage-backed securities | 15,620 |  |  | — |  |  | 15,620 |  |  | — |  |
Commercial mortgage-backed securities | 3,666 |  |  | — |  |  | 3,666 |  |  | — |  |
Corporate bonds | 467 |  |  | — |  |  | 299 |  |  | 168 |  |
Municipal bonds | 17 |  |  | — |  |  | 17 |  |  | — |  |
Total investment securities available for sale | $ | 33,750 |  |  | $ | — |  |  | $ | 33,582 |  |  | $ | 168 |  |
Marketable equity securities | 101 |  |  | 48 |  |  | 53 |  |  | — |  |
Loans held for sale | 55 |  |  | — |  |  | 55 |  |  | — |  |
Derivative assets (1) |  |  |  |  |  |  |  |
Total qualifying hedge assets | $ | 1 |  |  | $ | — |  |  | $ | 1 |  |  | $ | — |  |
Interest rate contracts — non-qualifying hedges | $ | 491 |  |  | $ | — |  |  | $ | 490 |  |  | $ | 1 |  |
Foreign exchange contracts — non-qualifying hedges | 152 |  |  | — |  |  | 152 |  |  | — |  |
Other derivative contracts — non-qualifying hedges | 16 |  |  | — |  |  | — |  |  | 16 |  |
Total non-qualifying hedge assets | $ | 659 |  |  | $ | — |  |  | $ | 642 |  |  | $ | 17 |  |
Total derivative assets | $ | 660 |  |  | $ | — |  |  | $ | 643 |  |  | $ | 17 |  |
Liabilities |  |  |  |  |  |  |  |
Derivative liabilities (1) |  |  |  |  |  |  |  |
Interest rate contracts — qualifying hedges | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |
Interest rate contracts — non-qualifying hedges | $ | 516 |  |  | $ | — |  |  | $ | 516 |  |  | $ | — |  |
Foreign exchange contracts — non-qualifying hedges | 108 |  |  | — |  |  | 108 |  |  | — |  |
Other derivative contracts — non-qualifying hedges | 1 |  |  | — |  |  | — |  |  | 1 |  |
Total non-qualifying hedge liabilities | $ | 625 |  |  | $ | — |  |  | $ | 624 |  |  | $ | 1 |  |
Total derivative liabilities | $ | 625 |  |  | $ | — |  |  | $ | 624 |  |  | $ | 1 |  |
(1) Derivative fair values include accrued interest.
Schedule of Fair Value Measurement Inputs and Valuation Techniques | The following tables summarize information about significant unobservable inputs related to BancShares’ categories of Level 3 financial assets and liabilities measured on a recurring basis: Quantitative Information About Level 3 Fair Value Measurements - Recurring Basis
dollars in millions |  |  |  |  |  |  |  |  |  |  |  |
Financial Instrument |  | Estimated Fair Value |  | Valuation Technique |  | Significant Unobservable Inputs |  |  |  |
|  | March 31, 2025 |  | December 31, 2024 |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds |  | $ | 168 |  |  | $ | 168 |  |  | Indicative bid provided by broker |  | Multiple factors, including but not limited to, current operations, financial condition, cash flows, and recently executed financing transactions related to the issuer. |  |  |  |
Interest rate & other derivative — non-qualifying hedges |  | $ | 19 |  |  | $ | 17 |  |  | Internal valuation model |  | Multiple factors, including but not limited to, private company valuation, illiquidity discount, and estimated life of the instrument. |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |
Interest rate & other derivative — non-qualifying hedges |  | $ | 1 |  |  | $ | 1 |  |  | Internal valuation model |  | Not material |  |  |  |
Schedule of Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation | The following table summarizes the changes in estimated fair value for all assets and liabilities measured at estimated fair value on a recurring basis using significant unobservable inputs (Level 3): Changes in Estimated Fair Value of Level 3 Financial Assets and Liabilities - Recurring Basis
dollars in millions | Three Months Ended March 31, 2025 |  | Three Months Ended March 31, 2024
| Corporate Bonds |  | Other Derivative Assets — Non-Qualifying |  | Other Derivative Liabilities — Non-Qualifying |  | Corporate Bonds |  | Other Derivative Assets — Non-Qualifying |  | Other Derivative Liabilities — Non-Qualifying
Beginning balance | $ | 168 |  |  | $ | 17 |  |  | $ | 1 |  |  | $ | 157 |  |  | $ | 7 |  |  | $ | 1 |
Purchases | — |  |  | 2 |  |  | — |  |  | — |  |  | 3 |  |  | — |
Changes in fair value included in earnings | — |  |  | 1 |  |  | — |  |  | — |  |  | — |  |  | — |
Changes in fair value included in comprehensive income | — |  |  | — |  |  | — |  |  | 4 |  |  | — |  |  | — |
Maturity and settlements | — |  |  | (1) |  |  | — |  |  | — |  |  | (1) |  |  | — |
Ending balance | $ | 168 |  |  | $ | 19 |  |  | $ | 1 |  |  | $ | 161 |  |  | $ | 9 |  |  | $ | 1 |
Schedule of Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation | The following table summarizes the changes in estimated fair value for all assets and liabilities measured at estimated fair value on a recurring basis using significant unobservable inputs (Level 3): Changes in Estimated Fair Value of Level 3 Financial Assets and Liabilities - Recurring Basis
dollars in millions | Three Months Ended March 31, 2025 |  | Three Months Ended March 31, 2024
| Corporate Bonds |  | Other Derivative Assets — Non-Qualifying |  | Other Derivative Liabilities — Non-Qualifying |  | Corporate Bonds |  | Other Derivative Assets — Non-Qualifying |  | Other Derivative Liabilities — Non-Qualifying
Beginning balance | $ | 168 |  |  | $ | 17 |  |  | $ | 1 |  |  | $ | 157 |  |  | $ | 7 |  |  | $ | 1 |
Purchases | — |  |  | 2 |  |  | — |  |  | — |  |  | 3 |  |  | — |
Changes in fair value included in earnings | — |  |  | 1 |  |  | — |  |  | — |  |  | — |  |  | — |
Changes in fair value included in comprehensive income | — |  |  | — |  |  | — |  |  | 4 |  |  | — |  |  | — |
Maturity and settlements | — |  |  | (1) |  |  | — |  |  | — |  |  | (1) |  |  | — |
Ending balance | $ | 168 |  |  | $ | 19 |  |  | $ | 1 |  |  | $ | 161 |  |  | $ | 9 |  |  | $ | 1 |
Schedule of Fair Value Option | The following table summarizes the difference between the aggregate fair value and the unpaid principal balance (“UPB”) for residential mortgage loans originated for sale measured at fair value: Aggregate Fair Value and UPB - Residential Mortgage Loans
dollars in millions | March 31, 2025 |  | December 31, 2024
| Fair Value |  | Unpaid Principal Balance |  | Difference |  | Fair Value |  | Unpaid Principal Balance |  | Difference
Originated loans held for sale (1) | $ | 93 |  |  | $ | 94 |  |  | $ | (1) |  |  | $ | 55 |  |  | $ | 54 |  |  | $ | 1 |
(1) Originated loans held for sale include loans held for sale and loans originated for sale but transferred to portfolio and held for investment.
Schedule of Fair Value, Assets Measured on Nonrecurring Basis | The following table presents carrying value of assets measured at estimated fair value on a non-recurring basis for which gains and losses have been recorded in the periods. The gains and losses reflect amounts recorded for the respective periods, regardless of whether the asset is still held at period end. Assets Measured at Fair Value - Non-recurring Basis
dollars in millions | Fair Value Measurements |  |
| Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total Gains (Losses)
March 31, 2025 |  |  |  |  |  |  |  |  |
Assets held for sale - loans | $ | 23 |  |  | $ | — |  |  | $ | — |  |  | $ | 23 |  |  | $ | (7) |
Loans - collateral dependent loans | 212 |  |  | — |  |  | — |  |  | 212 |  |  | (55) |
Other real estate owned | 66 |  |  | — |  |  | — |  |  | 66 |  |  | (8) |
Total | $ | 301 |  |  | $ | — |  |  | $ | — |  |  | $ | 301 |  |  | $ | (70) |
December 31, 2024 |  |  |  |  |  |  |  |  |
Assets held for sale - loans | $ | 13 |  |  | $ | — |  |  | $ | — |  |  | $ | 13 |  |  | $ | (7) |
Loans - collateral dependent loans | 388 |  |  | — |  |  | — |  |  | 388 |  |  | (171) |
Other real estate owned | 16 |  |  | — |  |  | — |  |  | 16 |  |  | 6 |
Total | $ | 417 |  |  | $ | — |  |  | $ | — |  |  | $ | 417 |  |  | $ | (172) |
Schedule of Carrying Values and Estimated Fair Values for Financial Instruments | The table below presents the carrying values and estimated fair values for financial instruments, excluding leases and certain other assets and liabilities for which these disclosures are not required. Carrying Values and Fair Values of Financial Assets and Liabilities
dollars in millions | March 31, 2025
|  |  | Estimated Fair Value
| Carrying Value |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Financial Assets |  |  |  |  |  |  |  |  |
Cash and due from banks | $ | 812 |  |  | $ | 812 |  |  | $ | — |  |  | $ | — |  |  | $ | 812 |
Interest-earning deposits at banks | 24,692 |  |  | 24,692 |  |  | — |  |  | — |  |  | 24,692 |
Securities purchased under agreements to resell | 345 |  |  | — |  |  | 345 |  |  | — |  |  | 345 |
Investment in marketable equity securities | 95 |  |  | 42 |  |  | 53 |  |  | — |  |  | 95 |
Investment securities available for sale | 33,900 |  |  | — |  |  | 33,732 |  |  | 168 |  |  | 33,900 |
Investment securities held to maturity | 10,324 |  |  | — |  |  | 8,973 |  |  | — |  |  | 8,973 |
Loans held for sale | 183 |  |  | — |  |  | 70 |  |  | 115 |  |  | 185 |
Net loans | 137,692 |  |  | — |  |  | 1,491 |  |  | 136,450 |  |  | 137,941 |
Accrued interest receivable | 920 |  |  | — |  |  | 920 |  |  | — |  |  | 920 |
Federal Home Loan Bank stock | 20 |  |  | — |  |  | 20 |  |  | — |  |  | 20 |
Mortgage servicing rights | 28 |  |  | — |  |  | — |  |  | 46 |  |  | 46 |
Derivative assets - qualifying hedges | 1 |  |  | — |  |  | 1 |  |  | — |  |  | 1 |
Derivative assets - non-qualifying hedges | 552 |  |  | — |  |  | 533 |  |  | 19 |  |  | 552 |
Financial Liabilities |  |  |  |  |  |  |  |  |
Deposits with no stated maturity | 147,330 |  |  | — |  |  | 147,330 |  |  | — |  |  | 147,330 |
Time deposits | 11,995 |  |  | — |  |  | 11,986 |  |  | — |  |  | 11,986 |
Credit balances of factoring clients | 1,145 |  |  | — |  |  | — |  |  | 1,145 |  |  | 1,145 |
Securities sold under customer repurchase agreements | 450 |  |  | — |  |  | 450 |  |  | — |  |  | 450 |
Long-term borrowings | 37,920 |  |  | — |  |  | 37,714 |  |  | — |  |  | 37,714 |
Accrued interest payable | 107 |  |  | — |  |  | 107 |  |  | — |  |  | 107 |
Derivative liabilities - qualifying hedges | — |  |  | — |  |  | — |  |  | — |  |  | — |
Derivative liabilities - non-qualifying hedges | 541 |  |  | — |  |  | 540 |  |  | 1 |  |  | 541 |
| December 31, 2024
|  |  | Estimated Fair Value
| Carrying Value |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Financial Assets |  |  |  |  |  |  |  |  |
Cash and due from banks | $ | 814 |  |  | $ | 814 |  |  | $ | — |  |  | $ | — |  |  | $ | 814 |
Interest-earning deposits at banks | 21,364 |  |  | 21,364 |  |  | — |  |  | — |  |  | 21,364 |
Securities purchased under agreements to resell | 158 |  |  | — |  |  | 158 |  |  | — |  |  | 158 |
Investment in marketable equity securities | 101 |  |  | 48 |  |  | 53 |  |  | — |  |  | 101 |
Investment securities available for sale | 33,750 |  |  | — |  |  | 33,582 |  |  | 168 |  |  | 33,750 |
Investment securities held to maturity | 10,239 |  |  | — |  |  | 8,702 |  |  | — |  |  | 8,702 |
Loans held for sale | 82 |  |  | — |  |  | 55 |  |  | 27 |  |  | 82 |
Net loans | 136,567 |  |  | — |  |  | 1,463 |  |  | 133,409 |  |  | 134,872 |
Accrued interest receivable | 902 |  |  | — |  |  | 902 |  |  | — |  |  | 902 |
Federal Home Loan Bank stock | 20 |  |  | — |  |  | 20 |  |  | — |  |  | 20 |
Mortgage servicing rights | 27 |  |  | — |  |  | — |  |  | 47 |  |  | 47 |
Derivative assets - qualifying hedges | 1 |  |  | — |  |  | 1 |  |  | — |  |  | 1 |
Derivative assets - non-qualifying hedges | 659 |  |  | — |  |  | 642 |  |  | 17 |  |  | 659 |
Financial Liabilities |  |  |  |  |  |  |  |  |
Deposits with no stated maturity | 141,976 |  |  | — |  |  | 141,976 |  |  | — |  |  | 141,976 |
Time deposits | 13,253 |  |  | — |  |  | 13,247 |  |  | — |  |  | 13,247 |
Credit balances of factoring clients | 1,016 |  |  | — |  |  | — |  |  | 1,016 |  |  | 1,016 |
Securities sold under customer repurchase agreements | 367 |  |  | — |  |  | 367 |  |  | — |  |  | 367 |
Long-term borrowings | 36,669 |  |  | — |  |  | 36,220 |  |  | — |  |  | 36,220 |
Accrued interest payable | 134 |  |  | — |  |  | 134 |  |  | — |  |  | 134 |
Derivative liabilities - qualifying hedges | — |  |  | — |  |  | — |  |  | — |  |  | — |
Derivative liabilities - non-qualifying hedges | 625 |  |  | — |  |  | 624 |  |  | 1 |  |  | 625 |

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- Definition Tabular disclosure of information about asset and liability measured at fair value under fair value option. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-30 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 28 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-28 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 31 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-31 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-32 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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