Consolidated Balance Sheet (Unaudited) (Parenthetical) - USD ($) $ in Thousands |
Mar. 31, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Investment securities, available for sale, amortized cost | $ 25,219,000 | $ 22,994,000 |
| Investment securities, held to maturity, fair value | 11,355,000 | 11,715,000 |
| Equity and other securities, cost | $ 1,273,000 | $ 1,016,000 |
| Common stock par value (in USD per share) | $ 0.50 | $ 0.50 |
| Common stock authorized (in shares) | 250,000,000 | 250,000,000 |
| Common stock issued (in shares) | 179,436,779 | 179,436,779 |
| Treasury stock (in shares) | 32,523,605 | 27,604,513 |
| Financing receivable, accrued interest, before allowance for credit loss | $ 616,000 | $ 627,000 |
| M&T | ||
| Asset-backed notes (a) | 2,027,000 | 1,730,000 |
| Variable Interest Entity Primary Beneficiary | M&T Bank | ||
| Financing receivable, accrued interest, before allowance for credit loss | $ 2,400,000 | $ 2,100,000 |
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- Definition Equity and other securities at cost. No definition available.
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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Face amount or stated value per share of common stock. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The maximum number of common shares permitted to be issued by an entity's charter and bylaws. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, before allowance for credit loss, of accrued interest on financing receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Carrying amount of collateralized debt obligations with maturities initially due after one year or beyond the operating cycle, if longer, excluding the current portion. Obligations include, but not limited to, mortgage loans, chattel loans, and other borrowings secured by assets. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of previously issued common shares repurchased by the issuing entity and held in treasury. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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