Revenue from contracts with customers (Tables)

3 Months Ended

Mar. 31, 2025

Revenue from Contract with Customer [Abstract]

Summary of Sources of Noninterest Income that are Subject to Revenue Recognition Accounting Guidance

The following tables summarize sources of the Company’s noninterest income during the three-month periods ended March 31, 2025 and 2024 that are subject to the revenue recognition accounting guidance.

(Dollars in millions)	Commercial Bank		Retail Bank		Institutional Services and Wealth Management		Total
Three Months Ended March 31, 2025
Classification in Consolidated Statement of Income
Service charges on deposit accounts	$	45	$	88	$	—	$	133
Trust income	1		—		176		177
Brokerage services income	1		—		31		32
Other revenues from operations:
Merchant discount and credit card interchange fees	16		21		—		37
Other	9		7		2		18
	$	72	$	116	$	209	$	397
Three Months Ended March 31, 2024
Classification in Consolidated Statement of Income
Service charges on deposit accounts	$	40	$	84	$	—	$	124
Trust income	1		—		159		160
Brokerage services income	2		—		27		29
Other revenues from operations:
Merchant discount and credit card interchange fees	17		20		—		37
Other	8		7		2		17
	$	68	$	111	$	188	$	367