Changes in Operations United States - Pinsly (Details) - Pinsly [Member] $ in Millions		3 Months Ended
Jan. 05, 2015 USD ($) employee mile locomotive	Mar. 31, 2016 carload
Cash consideration \| $	$ 41.3
Track miles \| mile	137
Number of employees \| employee	77
Number of locomotives purchased \| locomotive	16
Annual carloads transported \| carload		35,000

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585

Name:	us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration