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Short-term Borrowings | 12 Months Ended
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Dec. 31, 2022
Short-Term Debt [Abstract] |
Short-term Borrowings | SHORT-TERM BORROWINGS Federal funds purchased and securities sold under agreements to repurchase generally mature within one to four days from the transaction date. Other short-term borrowings, which may consist of borrowed securities and short-term notes, generally mature within one to 120 days from the transaction date. At December 31, 2022, other short-term borrowings consisted of advances from the Federal Home Loan Bank (FHLB) of Dallas, Texas, which provides short- and long-term funding to its members through advances collateralized by real estate-related loans, certain government agency-backed securities and other eligible assets. Actual borrowing capacity is contingent on the amount of collateral pledged to the FHLB. At December 31, 2022, $9.5 billion of real estate-related loans and $1.0 billion of investment securities were pledged to the FHLB as collateral for the short-term advances and provided an additional $7.2 billion for potential future borrowings. At December 31, 2022, Comerica Bank (the Bank), a wholly-owned subsidiary of the Corporation, had pledged loans totaling $24.5 billion, which provided for up to $19.6 billion of available collateralized borrowing with the FRB. The following table provides a summary of short-term borrowings.
(dollar amounts in millions) | Federal Funds Purchased and Securities Sold Under Agreements to Repurchase |  | Other Short-term Borrowings
December 31, 2022 |  |  |
Amount outstanding at year-end | $ | 11 |  |  | $ | 3,200 |
Weighted average interest rate at year-end | 4.32 | % |  | 4.54 | %
Maximum month-end balance during the year | $ | 1,106 |  |  | $ | 3,200 |
Average balance outstanding during the year | 82 |  |  | 354 |
Weighted average interest rate during the year | 3.28 | % |  | 4.08 | %
December 31, 2021 |  |  |
Amount outstanding at year-end | $ | — |  |  | $ | — |
Weighted average interest rate at year-end | — | % |  | — | %
Maximum month-end balance during the year | $ | 2 |  |  | $ | — |
Average balance outstanding during the year | 2 |  |  | — |
Weighted average interest rate during the year | 0.06 | % |  | — | %
December 31, 2020 |  |  |
Amount outstanding at year-end | $ | — |  |  | $ | — |
Weighted average interest rate at year-end | — | % |  | — | %
Maximum month-end balance during the year | $ | 1,513 |  |  | $ | 1,250 |
Average balance outstanding during the year | 30 |  |  | 284 |
Weighted average interest rate during the year | 0.97 | % |  | 0.25 | %

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- Definition The entire disclosure for short-term debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -URI https://asc.fasb.org/topic&trid=2208564 + Details
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