Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2022

Accounting Policies [Abstract]

Remaining Performance Obligation

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 March 31, 2022 and the percentage of the outstanding performance obligations as of March 31, 2022 expected to be delivered during the remainder of 2022:

	Unsatisfied performance obligations at March 31, 2022
	Total Amount		Percent expected to be delivered in 2022
	(in millions)
Rail Products Group:
New railcars:
External customers	$	1,209.3
Leasing Group	686.1
	$	1,895.4	59.5	%
Sustainable railcar conversions	$	128.2	95.6	%
Maintenance services	$	2.2	100.0	%
Railcar Leasing and Management Services Group	$	69.8	17.8	%

Lessee, Operating Lease, Liability, Maturity [Table Text Block]

Future contractual minimum operating lease liabilities will mature as follows (in millions):

	Leasing Group		Non-Leasing Group		Total
Remaining nine months of 2022	$	9.2	$	5.7	$	14.9
2023	10.5		7.2		17.7
2024	7.0		6.3		13.3
2025	5.2		5.6		10.8
2026	4.9		5.2		10.1
Thereafter	7.6		56.7		64.3
Total operating lease payments	$	44.4	$	86.7	$	131.1
Less: Present value adjustment					(18.8)
Total operating lease liabilities					$	112.3

Lessor, Payments to be Received, Maturity [Table Text Block]

Future contractual minimum revenues for operating leases will mature as follows (in millions)(1):

Remaining nine months of 2022	$	421.4
2023	436.7
2024	330.0
2025	237.3
2026	157.0
Thereafter	283.2
Total	$	1,865.6

(1) Total contractual minimum rental revenues on operating leases relates to our wholly-owned and partially-owned subsidiaries and sub-lease rental revenues associated with the Leasing Group's operating lease obligations.

Future contractual minimum lease receivables for sales-type leases will mature as follows (in millions)(1):

Remaining nine months of 2022	$	0.8
2023	1.1
2024	1.1
2025	1.1
2026	1.1
Thereafter	11.0
Total	16.2
Less: Unearned interest income	(5.5)
Net investment in sales-type leases (1)	$	10.7

(1) Included in other assets in our Consolidated Balance Sheets.

Schedule of Product Warranty Liability [Table Text Block]

The changes in the accruals for warranties for the three months ended March 31, 2022 and 2021 are as follows:

	Three Months Ended March 31,
	2022		2021
	(in millions)
Beginning balance	$	3.1	$	11.3
Warranty costs incurred	(1.2)		(0.5)
Warranty originations and revisions	1.6		(3.7)
Warranty expirations	(0.3)		(0.2)
Ending balance	$	3.2	$	6.9