Note 1. Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

Accounting Policies [Abstract]

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]

Unsatisfied Performance Obligations

The following table includes estimated revenue expected to be recognized in future periods related to performance obligations that are unsatisfied or partially satisfied as of December 31, 2021 and the percentage of the outstanding performance obligations as of December 31, 2021 expected to be delivered during 2022:

	Unsatisfied performance obligations at December 31, 2021
	Total Amount		Percent expected to be delivered in 2022
	(in millions)
Rail Products Group:
New railcars:
External customers	$	1,018.1
Leasing Group	498.7
	$	1,516.8	69.1	%
Sustainable railcar conversions (1)	$	111.5	95.7	%
Maintenance services	$	3.0	100.0	%
Railcar Leasing and Management Services Group	$	71.3	21.7	%

(1) During 2021, the Rail Products Group introduced a sustainable railcar conversion program whereby certain tank cars and freight cars are converted or upgraded to better meet changing market demands.