Non-Residential Loans Held for Sale (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Financing Receivable, Held-for-Sale, Not Part of Disposal Group, after Valuation Allowance	$ 22.7		$ 47.4
Transfer of loans to held-for-sale	0.0	$ 3.1
Loans held for sale	22.7		47.4
Agricultural
Debt Securities, Available-for-sale [Line Items]
Proceeds from Collection of Loans Held-for-sale	(0.1)
Loans held for sale	19.5		19.6
Proceeds from Sale of Loans Held-for-sale	0.0
Commercial Real Estate Portfolio
Debt Securities, Available-for-sale [Line Items]
Proceeds from Collection of Loans Held-for-sale	0.0
Loans held for sale	0.0		$ 27.3
Proceeds from Sale of Loans Held-for-sale	$ (27.3)