Debt - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Corporate Segment [Member] | Senior Notes [Member] | 4.55% Senior Notes Due October 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.55%
Corporate Segment [Member] | Revolving Credit Facility [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity	$ 600.0	$ 450.0
Line of Credit Facility, Capacity Available for Specific Purpose Other than for Trade Purchases	100.0
Payments of Debt Issuance Costs	0.5
Proceeds from Lines of Credit	155.0
Repayments of Lines of Credit	75.0
Line of Credit Facility, Remaining Borrowing Capacity	$ 278.2
Debt Instrument, Basis Spread on Variable Rate	1.75%
Debt Instrument, Interest Rate, Effective Percentage	6.69%
Line of Credit Facility, Interest Rate at Period End	0.25%
Corporate Segment [Member] | Letter of Credit [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount	$ 16.8
TILC [Member] | Railcar Leasing and Management Services Group [Member] | Revolving Credit Facility [Member] | Line of Credit [Member] | TILC Warehouse Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity	1,000.0
Proceeds from Lines of Credit	91.8
Repayments of Lines of Credit	17.4
Line of Credit Facility, Remaining Borrowing Capacity	203.8
Line of Credit Facility, Maximum Borrowing Capacity	$ 91.4
Debt Instrument, Interest Rate, Effective Percentage	6.63%
Minimum | Corporate Segment [Member] | Revolving Credit Facility [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Interest Rate at Period End	0.175%
Maximum | Corporate Segment [Member] | Revolving Credit Facility [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Interest Rate at Period End	0.40%