DOCUMENT AND ENTITY INFORMATION DOCUMENT Document and Entity Information Document (USD $)
In Billions, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Feb. 20, 2013
Jun. 30, 2012
Document Information [Line Items]      
Document Period End Date Dec. 31, 2012    
Document Fiscal Year Focus 2012    
Entity Filer Category Large Accelerated Filer    
Document Type 10-K    
Document Fiscal Period Focus FY    
Entity Registrant Name PRICELINE COM INC    
Amendment Flag false    
Entity Common Stock, Shares Outstanding   49,870,893  
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Central Index Key 0001075531    
Current Fiscal Year End Date --12-31    
Entity Public Float     $ 32.8