Note 1. Summary of Significant Accounting Policies Lessee Accounting (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020		Dec. 31, 2019
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		15.2	$ 15.1		$ 17.4
Short-term lease expense		0.2	2.1		4.1
Operating Lease, Payments		15.2	15.1		17.4
Right-of-use assets recognized in exchange for new lease liabilities (1)		$ 23.0	$ 54.5	[1]	$ 8.5
Weighted average remaining lease term		10 years 9 months 18 days	11 years 3 months 18 days
Weighted average discount rate		3.00%	3.30%
2022		$ 18.1
2023		16.3
2024		11.8
2025		9.4
2026		8.7
Thereafter		60.8
Lessee, Operating Lease, Liability, to be Paid		125.1
Less: Present value adjustment		$ (18.8)
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		15 years
Railcar Leasing and Management Services Group [Member]
Lessee, Lease, Description [Line Items]
2022		$ 10.9
2023		9.1
2024		5.6
2025		3.8
2026		3.5
Thereafter		4.1
Lessee, Operating Lease, Liability, to be Paid		37.0
Consolidated Subsidiaries, Excluding Leasing [Member]
Lessee, Lease, Description [Line Items]
2022		7.2
2023		7.2
2024		6.2
2025		5.6
2026		5.2
Thereafter		56.7
Lessee, Operating Lease, Liability, to be Paid		88.1
Other Assets [Member]
Lessee, Lease, Description [Line Items]
Right-of-use assets (2)	[2]	82.8	$ 73.5
Other Liabilities
Lessee, Lease, Description [Line Items]
Lease liabilities (3)	[3]	$ 106.3	$ 93.5

[1] Includes the commencement of the new headquarters facility for the year ended December 31, 2020

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

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