Derivative Instruments (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Dec. 31, 2024
Derivatives, Fair Value [Line Items]
Collateral received	$ 47.0	$ 57.3
Amortized cost of hedged assets	273.5	282.5
Fair value hedge agreement, notional amount	100.0
Interest Rate Swap | Non-hedging interest rate derivatives:
Derivatives, Fair Value [Line Items]
Derivative, notional amount	$ 150.0	$ 150.0