Allowance for Credit Losses - Collateral-Dependent Loans and Leases (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Residential Real Estate [Member]
Financing Receivable, Nonaccrual
Amortized cost basis of collateral-dependent loans	$ 32.5	$ 11.1

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-16

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