PROPERTY, PLANT AND EQUIPMENT - Additional Information (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Abstract]
Property, plant and equipment purchased on account	$ 204	$ 309

Property, Plant, and Equipment Purchased on Account

No definition available.

Name:	ups_PropertyPlantAndEquipmentPurchasedOnAccount
Namespace Prefix:	ups_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant