LEGAL PROCEEDINGS, ENVIRONMENTAL MATTERS, AND OTHER EVENTS (Details) $ in Millions	12 Months Ended
Dec. 31, 2015 USD ($) tank state	Dec. 31, 2014 USD ($)
Underground fuel storage tanks
Environmental Matters
Number of underground tanks where the company's subsidiaries store fuel for use in tractors and trucks \| tank	62
Number of states in which underground tanks are located \| state	18
Clean Water Act \| Brooklyn, New York branch \| Freight Transportation (ABF Freight)
Environmental Matters
Reserve for environmental contingencies	$ 0.0
Environmental cleanup costs
Environmental Matters
Reserve for environmental contingencies	0.8	$ 0.8
Maximum \| Clean Water Act \| Kent, Washington branch \| Freight Transportation (ABF Freight)
Environmental Matters
Amount paid for resolution	$ 0.2

Represents the number of states in which reporting entity's subsidiaries' underground fuel storage tanks are located.

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- Definition

Represents the number of underground tanks in which the reporting entity's subsidiaries store fuel.

+ References

No definition available.

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- Definition

The aggregate amount disbursed during the reporting period to settle environmental loss contingencies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 5.Y.Q2)
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Carrying value of the obligation (known or estimated) arising from requirements to perform activities to remediate one or more sites, payable in twelve months or in the next operating cycle if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 30
-Section 50
-Paragraph 7
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-Name Accounting Standards Codification
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