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Restructuring (Details) $ in Millions	6 Months Ended
	Jun. 30, 2019 USD ($)
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2018	$ 20.7
Restructuring-related costs	3.7
Paid during the period	(14.5)
Restructuring charges as of June 30, 2019	9.8
Operating Segments | Aviation
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2018	1.4
Restructuring-related costs	0.4
Paid during the period	(1.5)
Restructuring charges as of June 30, 2019	0.4
Operating Segments | Land
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2018	12.6
Restructuring-related costs	1.0
Paid during the period	(6.4)
Restructuring charges as of June 30, 2019	7.2
Operating Segments | Marine
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2018	2.6
Restructuring-related costs	1.0
Paid during the period	(1.9)
Restructuring charges as of June 30, 2019	1.7
Corporate
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2018	4.0
Restructuring-related costs	1.2
Paid during the period	(4.7)
Restructuring charges as of June 30, 2019	$ 0.5

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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 17
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3367-108585

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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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 1
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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
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