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Other Matters - Sale of Certain Railcars (Details) $ in Millions				1 Months Ended	3 Months Ended
	May 16, 2025 USD ($)	Apr. 30, 2025 USD ($)	Apr. 14, 2025 USD ($)	Aug. 11, 2025 USD ($)	Jun. 30, 2025 USD ($)	Mar. 31, 2025
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Total number of railcars to be sold						135
Number of railcars sold	68				104
Total consideration	$ 2.1	$ 154.9	$ 40.0		$ 5.0
Gain on disposal or impairment of assets, net		56.6	$ 1.2
Number of railcars owned					31
Liquids Logistics
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Gain on disposal or impairment of assets, net		$ 18.2
Certain Railcars
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Gain on disposal or impairment of assets, net	$ 0.1				$ 1.6
Subsequent Event
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Number of railcars sold				24
Total consideration				$ 1.1
Subsequent Event | Certain Railcars
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Gain on disposal or impairment of assets, net				$ 0.4

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Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 360
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-Name Accounting Standards Codification
-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482099/360-10-50-3A

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-URI https://asc.fasb.org/1943274/2147482099/360-10-50-3A

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