Supplemental Cash Flow and Noncash Investing Transactions (Details) $ in Millions	12 Months Ended
Dec. 31, 2024 USD ($) tankContainer	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($) tankContainer
Noncash or Part Noncash Divestitures [Line Items]
Number of railcars received \| tankContainer	728		21
Assets Held-for-sale, Long Lived, Fair Value Disclosure	$ 0.4	$ 0.8
Supplemental Cash Flow Information
Interest Paid, Excluding Capitalized Interest, Operating Activities	350.1	260.1	$ 202.7
Income taxes paid (refunded), net	23.0	17.3	18.7
Portfolio proceeds	$ 230.6	$ 272.8	$ 269.6

Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 17
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 25
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-25

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482913/230-10-50-2

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