Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information (USD $)
12 Months Ended
Dec. 31, 2012
Jun. 30, 2012
Jan. 31, 2013
Class A Common Stock
Jan. 31, 2013
Class B Common Stock
Document Type 10-K      
Amendment Flag false      
Document Period End Date Dec. 31, 2012      
Document Fiscal Year Focus 2012      
Document Fiscal Period Focus FY      
Trading Symbol UPS      
Entity Registrant Name UNITED PARCEL SERVICE INC      
Entity Central Index Key 0001090727      
Current Fiscal Year End Date --12-31      
Entity Well-known Seasoned Issuer Yes      
Entity Current Reporting Status Yes      
Entity Voluntary Filers No      
Entity Filer Category Large Accelerated Filer      
Entity Public Float   $ 57,146,565,574    
Entity Common Stock, Shares Outstanding     223,092,434 730,357,508