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Restructuring - Summary of Restructuring Activities (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Restructuring Reserve [Roll Forward]
Restructuring charges	$ 5.6	$ 0.0	$ 5.8	$ 0.0
Restructuring, 2023 Initiative | Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Beginning balance			5.7
Restructuring charges			2.5		$ 7.2
Payments for Restructuring			(4.2)
Ending balance	4.0		4.0		5.7
Operating Segments | Aviation Segment | Restructuring, 2023 Initiative | Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Beginning balance			1.2
Restructuring charges			0.1
Payments for Restructuring			(0.7)
Ending balance	0.6		0.6		1.2
Operating Segments | Land | Restructuring, 2023 Initiative | Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Beginning balance			3.7
Restructuring charges			1.2
Payments for Restructuring			(2.7)
Ending balance	2.1		2.1		3.7
Operating Segments | Marine | Restructuring, 2023 Initiative | Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Beginning balance			0.0
Restructuring charges			0.0
Payments for Restructuring			0.0
Ending balance	0.0		0.0		0.0
Corporate | Restructuring, 2023 Initiative | Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Beginning balance			0.9
Restructuring charges			1.2
Payments for Restructuring			(0.8)
Ending balance	$ 1.3		$ 1.3		$ 0.9

X

- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482017/420-10-50-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
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-Section 45
-Paragraph 17
-Subparagraph (f)
-Publisher FASB
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- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
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-Topic 230
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 5.P.4.b.1)
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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-Publisher FASB
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- Definition

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 5.P.4.b.2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479823/420-10-S99-2

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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482017/420-10-50-1

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