| SEGMENT INFORMATION - Additional Information (Detail) | 3 Months Ended | 
|---|---|
| Mar. 31, 2015
 Segments | |
| Segment Reporting Information [Line Items] | |
| Operating Segments, Number | 3ups_OperatingSegmentsNumber | 
| International Package | Minimum | |
| Segment Reporting Information [Line Items] | |
| Number of countries and territories in which service is rendered | 220us-gaap_NumberOfCountriesInWhichEntityOperates / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementBusinessSegmentsAxis = ups_InternationalPackageMember | 
| Supply Chain & Freight | Minimum | |
| Segment Reporting Information [Line Items] | |
| Number of countries and territories in which service is rendered | 195us-gaap_NumberOfCountriesInWhichEntityOperates / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementBusinessSegmentsAxis = ups_SupplyChainFreightMember | 
| X | ||||||||||
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- Definition Operating Segments, Number No definition available. 
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| X | ||||||||||
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- Definition The number of countries in which the entity operates as of balance sheet date. No definition available. 
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| X | ||||||||||
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- Details 
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| X | ||||||||||
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- Details 
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| X | ||||||||||
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- Details 
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