Fair Value Disclosure - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2026 USD ($) Instrument	Mar. 31, 2025 USD ($)	Dec. 31, 2025 USD ($) Instrument
Derivative [Line Items]
Gain (loss) on cash flow hedges expected to be reclassified within next twelve months	$ 5.3
Gain (loss) on cash flow hedges expected to be reclassified within next twelve months, net of tax	4.8
Credit risk derivatives liability	11.2		$ 28.5
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Asset impairments	1.7	$ 3.6
Rail International
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Asset impairments	$ 0.0	$ 0.0
Designated as Hedging Instrument | Fair Value Hedging [Member] | Interest Rate Contract [Member]
Derivative [Line Items]
Number of derivative instruments | Instrument	1		1
Derivative, notional amount	$ 50.0		$ 50.0
Designated as Hedging Instrument | Cash Flow Hedging | Foreign Exchange Contract [Member]
Derivative [Line Items]
Number of derivative instruments | Instrument	15		3
Derivative, notional amount	$ 1,763.0		$ 2,370.6