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SEGMENT AND GEOGRAPHIC INFORMATION - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2017 Location Segments | Dec. 31, 2016 | Dec. 31, 2015
Segment Reporting Information [Line Items] |  |  |
Number of operating segments | Segments | 3 |  |
Description of consolidated revenue | No countries outside of the United States, nor any individual customers, provided 10% or more of consolidated revenue. | No countries outside of the United States, nor any individual customers, provided 10% or more of consolidated revenue. | No countries outside of the United States, nor any individual customers, provided 10% or more of consolidated revenue.
International Package | Minimum |  |  |
Segment Reporting Information [Line Items] |  |  |
Number of countries and territories in which service is rendered | 220 |  |
Supply Chain & Freight | Minimum |  |  |
Segment Reporting Information [Line Items] |  |  |
Number of countries and territories in which service is rendered | 200 |  |

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- Definition Disclosure about revenues from external customers (1) attributed to the entity's country of domicile and (2) attributed to all foreign countries in total from which the entity derives revenues. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9038-108599 + Details
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