Note 6. Railcar Leasing and Management Services Group Selected Leasing Balance Sheet Information (Details) - USD ($) $ in Millions		Dec. 31, 2022	Dec. 31, 2021
Segment Reporting, Asset Reconciling Item [Line Items]
Cash and cash equivalents		$ 79.6	$ 167.3
Accounts receivable		323.5	227.6
Property, plant, and equipment, net		6,886.8	6,846.9
Restricted cash		214.7	135.1
Other assets		386.6	266.5
Total assets		8,724.3	8,235.9
Debt, net		5,607.6	5,170.6
Deferred income taxes		1,134.7	1,106.8
Other liabilities		163.9	147.9
Total liabilities		7,454.7	6,939.1
Noncontrolling interest		257.2	267.0
Total Equity		1,012.4	1,029.8
Operating Segments [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets		9,220.4	8,649.8
Operating Segments [Member] | Railcar Leasing and Management Services Group [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Cash and cash equivalents		2.6	3.4
Accounts receivable		100.7	100.8
Property, plant, and equipment, net		7,309.4	7,276.7
Restricted cash		214.7	135.1
Other assets		152.5	69.4
Total assets		7,779.9	7,585.4
Accounts payable and accrued liabilities		153.8	143.5
Debt, net		4,983.5	4,771.9
Deferred income taxes		1,153.4	1,115.3
Other liabilities		38.8	35.6
Total liabilities		6,329.5	6,066.3
Noncontrolling interest		257.2	267.0
Total Equity		1,193.2	1,252.1
Intersegment Eliminations [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Property, plant, and equipment, net		(763.3)	(779.1)
Wholly Owned Subsidiaries [Member] | Operating Segments [Member] | Railcar Leasing and Management Services Group [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Cash and cash equivalents		2.6	3.4
Accounts receivable		89.9	90.7
Property, plant, and equipment, net		5,788.1	5,706.1
Restricted cash		140.3	76.5
Other assets		150.3	67.3
Total assets		6,171.2	5,944.0
Accounts payable and accrued liabilities		109.7	113.4
Debt, net		3,800.7	3,555.8
Deferred income taxes		1,152.3	1,114.2
Other liabilities		38.8	35.6
Total liabilities		5,101.5	4,819.0
Noncontrolling interest		0.0	0.0
Total Equity		1,069.7	1,125.0
Partially-Owned Subsidiaries [Member] | Operating Segments [Member] | Railcar Leasing and Management Services Group [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Cash and cash equivalents		0.0	0.0
Accounts receivable		10.8	10.1
Property, plant, and equipment, net		1,521.3	1,570.6
Restricted cash		74.4	58.6
Other assets		2.2	2.1
Total assets		1,608.7	1,641.4
Accounts payable and accrued liabilities		44.1	30.1
Debt, net		1,182.8	1,216.1
Deferred income taxes		1.1	1.1
Other liabilities		0.0	0.0
Total liabilities		1,228.0	1,247.3
Noncontrolling interest		257.2	267.0
Total Equity		123.5	127.1
Consolidated Subsidiaries, Leasing [Member] | Intersegment Eliminations [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Cash and cash equivalents		0.0	0.0
Accounts receivable		0.0	0.0
Property, plant, and equipment, net	[1]	(763.3)	(779.1)
Restricted cash		0.0	0.0
Other assets		0.0	0.0
Total assets	[1]	(763.3)	(779.1)
Accounts payable and accrued liabilities		0.0	0.0
Debt, net		0.0	0.0
Deferred income taxes	[1]	(173.1)	(176.6)
Other liabilities		0.0	0.0
Total liabilities	[1]	(173.1)	(176.6)
Noncontrolling interest		0.0	0.0
Total Equity	[1]	(590.2)	(602.5)
Railcar Leasing and Management Services Group [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Cash and cash equivalents		2.6	3.4
Accounts receivable		100.7	100.8
Property, plant, and equipment, net		6,546.1	6,497.6
Restricted cash		214.7	135.1
Other assets		152.5	69.4
Total assets		7,016.6	6,806.3
Accounts payable and accrued liabilities		153.8	143.5
Debt, net		4,983.5	4,771.9
Deferred income taxes		980.3	938.7
Other liabilities		38.8	35.6
Total liabilities		6,156.4	5,889.7
Noncontrolling interest		257.2	267.0
Total Equity		$ 603.0	$ 649.6

[1] Net deferred profit on railcars sold to the Leasing Group consists of intersegment profit that is eliminated in consolidation. Net deferred profit and the related deferred tax impact are included as adjustments to the property, plant, and equipment, net and deferred income taxes line items, respectively, in the Eliminations – Lease Subsidiary column above to reflect the net book value of the railcars purchased by the Leasing Group from the Rail Products Group based on manufacturing cost. See Note 5 and Note 8 for a further discussion regarding our investment in our partially-owned leasing subsidiaries and the related indebtedness.