Restructuring Charges - Summary of Restructuring Reserve (Details) $ in Millions	6 Months Ended
Jun. 30, 2016 USD ($)
Restructuring Reserve [Roll Forward]
Beginning balance	$ 61.2
Charges Incurred	18.7
Payments	(40.1)
Ending balance	39.8
Operating Segments \| Transportation
Restructuring Reserve [Roll Forward]
Beginning balance	27.4
Charges Incurred	5.1
Payments	(22.4)
Ending balance	10.1
Operating Segments \| Transportation \| Contract termination
Restructuring Reserve [Roll Forward]
Beginning balance	0.1
Charges Incurred	0.0
Payments	0.0
Ending balance	0.1
Operating Segments \| Transportation \| Facilities
Restructuring Reserve [Roll Forward]
Beginning balance	0.6
Charges Incurred	0.5
Payments	(0.2)
Ending balance	0.9
Operating Segments \| Transportation \| Severance
Restructuring Reserve [Roll Forward]
Beginning balance	26.7
Charges Incurred	4.6
Payments	(22.2)
Ending balance	9.1
Operating Segments \| Logistics
Restructuring Reserve [Roll Forward]
Beginning balance	26.3
Charges Incurred	13.0
Payments	(12.2)
Ending balance	27.1
Operating Segments \| Logistics \| Contract termination
Restructuring Reserve [Roll Forward]
Beginning balance	0.8
Charges Incurred	0.0
Payments	(0.7)
Ending balance	0.1
Operating Segments \| Logistics \| Severance
Restructuring Reserve [Roll Forward]
Beginning balance	25.5
Charges Incurred	13.0
Payments	(11.5)
Ending balance	27.0
Corporate
Restructuring Reserve [Roll Forward]
Beginning balance	7.5
Charges Incurred	0.6
Payments	(5.5)
Ending balance	2.6
Corporate \| Contract termination
Restructuring Reserve [Roll Forward]
Beginning balance	4.0
Charges Incurred	0.0
Payments	(2.1)
Ending balance	1.9
Corporate \| Severance
Restructuring Reserve [Roll Forward]
Beginning balance	3.5
Charges Incurred	0.6
Payments	(3.4)
Ending balance	$ 0.7

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.

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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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 5.P.3)
-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB TOPIC 5.P.4(b))
-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 5
-Section P
-Subsection 3, 4

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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/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB TOPIC 5.P.4(b))
-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 5
-Section P
-Subsection 3, 4

+ Details

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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