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SEGMENT AND GEOGRAPHIC INFORMATION - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2019 Location Segments | Dec. 31, 2018 | Dec. 31, 2017
Segment Reporting Information [Line Items] |  |  |
Number of operating segments | Segments | 3 |  |
Description of consolidated revenue | No countries outside of the United States 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.
Revenue Benchmark | Customer Concentration Risk | Amazon.com, Inc. |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration risk (percent) | 11.60% |  |
Receivable Benchmark | Customer Concentration Risk | Amazon.com, Inc. |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration risk (percent) | 16.90% |  |
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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