Note 1. Summary of Significant Accounting Policies Lessee Accounting (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Renewal Term		5 years
Lessee, Operating Lease, Option to Terminate		one year
Finance Lease, Principal Payments		$ 0.0
Operating lease expense		21.8	$ 19.5	$ 18.2
Short-term lease expense		0.0	0.0	0.4
Operating Lease, Payments		21.8	19.5	18.2
Right-of-use assets recognized in exchange for new lease liabilities		$ 14.7	$ 24.1	$ 28.8
Right-of-use assets (1)	[1]	Other assets	Other assets
Lease liabilities (2)	[2]	Other liabilities	Other liabilities
Weighted average remaining lease term		8 years 4 months 24 days	9 years 3 months 18 days
Weighted average discount rate (3)	[3]	3.90%	3.60%
2025		$ 21.0
2026		19.6
2027		18.2
2028		13.9
2029		9.4
Thereafter		50.1
Lessee, Operating Lease, Liability, to be Paid		132.2
Less: Present value adjustment		(18.8)
Railroad Transportation Equipment [Member]
Lessee, Lease, Description [Line Items]
2025		8.6
2026		8.2
2027		7.5
2028		5.0
2029		1.7
Thereafter		5.1
Lessee, Operating Lease, Liability, to be Paid		36.1
Operating & Administrative Assets
Lessee, Lease, Description [Line Items]
2025		12.4
2026		11.4
2027		10.7
2028		8.9
2029		7.7
Thereafter		45.0
Lessee, Operating Lease, Liability, to be Paid		$ 96.1
Minimum [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract		1 year
Maximum [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract		12 years

[1] Included in other assets in our Consolidated Balance Sheets.

[2] Included in other liabilities in our Consolidated Balance Sheets.

[3] As the rate implicit in our leases is not readily determinable, we use the incremental borrowing rate at lease commencement of our Trinity Industries Leasing Company ("TILC") warehouse loan facility for railcar leases or our revolving credit facility for operating and administrative leases to determine the present value of lease payments.