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Loans and Leases - Net Charge-Offs (Recoveries) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together |  |  |  |
Net charge-offs (recoveries) | $ 135 | $ 139 | $ 279 | $ 276
Comerica Incorporated |  |  |  |
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together |  |  |  |
Net charge-offs (recoveries) |  |  | 111 |
Commercial | Commercial and industrial loans |  |  |  |
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together |  |  |  |
Net charge-offs (recoveries) | 65 | 69 | 134 | 121
Commercial | Commercial mortgage loans |  |  |  |
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together |  |  |  |
Net charge-offs (recoveries) | 0 | 3 | 0 | 14
Commercial | Commercial leases |  |  |  |
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together |  |  |  |
Net charge-offs (recoveries) | 0 | (1) | 0 | 1
Commercial | Commercial construction loans |  |  |  |
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together |  |  |  |
Net charge-offs (recoveries) | (1) | 0 | (1) | 0
Consumer | Residential mortgage loans |  |  |  |
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together |  |  |  |
Net charge-offs (recoveries) | 0 | (1) | 0 | (1)
Consumer | Home equity |  |  |  |
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together |  |  |  |
Net charge-offs (recoveries) | 0 | 0 | 0 | 1
Consumer | Indirect secured consumer loans |  |  |  |
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together |  |  |  |
Net charge-offs (recoveries) | 18 | 16 | 42 | 38
Consumer | Credit card |  |  |  |
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together |  |  |  |
Net charge-offs (recoveries) | 15 | 15 | 29 | 32
Consumer | Solar energy installation loans |  |  |  |
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together |  |  |  |
Net charge-offs (recoveries) | 25 | 20 | 47 | 38
Consumer | Other consumer loans |  |  |  |
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together |  |  |  |
Net charge-offs (recoveries) | $ 13 | $ 18 | $ 28 | $ 32

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