Relationship with Bayview Lending Group LLC and Bayview Financial Holdings, L.P.	3 Months Ended
Mar. 31, 2023
Text Block [Abstract]
Relationship with Bayview Lending Group LLC and Bayview Financial Holdings, L.P.	15. Relationship with Bayview Lending Group LLC and Bayview Financial Holdings, L.P. M&T holds a 20% minority interest in Bayview Lending Group LLC ("BLG"), a privately-held commercial mortgage company. That investment had no remaining carrying value at March 31, 2023 as a result of cumulative losses recognized and cash distributions received in prior years. Cash distributions now received from BLG are recognized as income by M&T and included in other revenues from operations. That income totaled $20 million and $30 million for the three-month periods ended March 31, 2023 and 2022, respectively. Bayview Financial Holdings, L.P. (together with its affiliates, "Bayview Financial"), a privately-held specialty finance company, is BLG's majority investor. In addition to their common investment in BLG, the Company and Bayview Financial conduct other business activities with each other. The Company has obtained loan servicing rights for mortgage loans from BLG and Bayview Financial having outstanding principal balances of $1.4 billion at each of March 31, 2023 and December 31, 2022. Revenues from those servicing rights were $2 million in each of the three-month periods ended March 31, 2023 and 2022. The Company sub-services residential mortgage loans for Bayview Financial having outstanding principal balances of $98.0 billion and $96.0 billion at March 31, 2023 and December 31, 2022, respectively. Revenues earned for sub-servicing loans for Bayview Financial were $32 million and $42 million for the three-month periods ended March 31, 2023 and 2022, respectively. In addition, the Company held $48 million and $50 million of mortgage-backed securities in its held-to-maturity portfolio at March 31, 2023 and December 31, 2022, respectively, that were securitized by Bayview Financial. At March 31, 2023, the Company held $523 million of Bayview Financial's $2.5 billion syndicated loan facility.

Relationship with Bayview Lending Group LLC and Bayview Financial Holdings, L.P.

3 Months Ended

Mar. 31, 2023

Relationship with Bayview Lending Group LLC and Bayview Financial Holdings, L.P.

15. Relationship with Bayview Lending Group LLC and Bayview Financial Holdings, L.P.

M&T holds a 20% minority interest in Bayview Lending Group LLC ("BLG"), a privately-held commercial mortgage company. That investment had no remaining carrying value at March 31, 2023 as a result of cumulative losses recognized and cash distributions received in prior years. Cash distributions now received from BLG are recognized as income by M&T and included in other revenues from operations. That income totaled $20 million and $30 million for the three-month periods ended March 31, 2023 and 2022, respectively.

Bayview Financial Holdings, L.P. (together with its affiliates, "Bayview Financial"), a privately-held specialty finance company, is BLG's majority investor. In addition to their common investment in BLG, the Company and Bayview Financial conduct other business activities with each other. The Company has obtained loan servicing rights for mortgage loans from BLG and Bayview Financial having outstanding principal balances of $1.4 billion at each of March 31, 2023 and December 31, 2022. Revenues from those servicing rights were $2 million in each of the three-month periods ended March 31, 2023 and 2022. The Company sub-services residential mortgage loans for Bayview Financial having outstanding principal balances of $98.0 billion and $96.0 billion at March 31, 2023 and December 31, 2022, respectively. Revenues earned for sub-servicing loans for Bayview Financial were $32 million and $42 million for the three-month periods ended March 31, 2023 and 2022, respectively. In addition, the Company held $48 million and $50 million of mortgage-backed securities in its held-to-maturity portfolio at March 31, 2023 and December 31, 2022, respectively, that were securitized by Bayview Financial. At March 31, 2023, the Company held $523 million of Bayview Financial's $2.5 billion syndicated loan facility.