Description of Business (Details) railcar in Thousands, $ in Millions		3 Months Ended
	Jan. 01, 2026 USD ($) locomotive railcar	Mar. 31, 2026 Segment	Dec. 31, 2025 USD ($)
Asset Acquisition [Line Items]
Number of business segments | Segment		3
Joint venture, ownership interest	30.00%
Joint venture, potential ownership interest to acquire	100.00%
Brookfield
Asset Acquisition [Line Items]
Joint venture, ownership interest	70.00%
Railcar Acquisition
Asset Acquisition [Line Items]
Term loan			$ 2,960.0
Railcar Acquisition | Brookfield
Asset Acquisition [Line Items]
Number of assets acquired | railcar	22
Locomotive Acquisition | Brookfield
Asset Acquisition [Line Items]
Number of assets acquired | locomotive	400
Wells Fargo Bank, N.A. | Railcar Acquisition
Asset Acquisition [Line Items]
Number of assets acquired | railcar	101
Asset acquisition, consideration transferred	$ 4,200.0
Wells Fargo Bank, N.A. | Locomotive Acquisition
Asset Acquisition [Line Items]
Number of assets acquired | locomotive	200
Asset acquisition, consideration transferred	$ 30.4