XML 36 R1.htm IDEA: XBRL DOCUMENT v3.22.0.1
Cover Page - USD ($)
$ in Billions
 12 Months Ended
Dec. 31, 2021
Feb. 07, 2022
Jun. 30, 2021
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2021    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 000-51222    
Entity Registrant Name DEXCOM, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 33-0857544    
Entity Address, Address Line One 6340 Sequence Drive    
Entity Address, City or Town San Diego    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 92121    
City Area Code 858    
Local Phone Number 200-0200    
Title of 12(b) Security Common Stock, $0.001 Par Value Per Share    
Trading Symbol DXCM    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 41.1
Entity Common Stock, Shares Outstanding   97,065,634  
Documents incorporated by reference Portions of the registrant’s definitive proxy statement relating to its 2022 Annual Meeting of Stockholders (the “Proxy Statement”) are incorporated by reference in Part III, Items 10 through 14 of this Annual Report on Form 10-K, as specified in the responses to those item numbers. Except with respect to information specifically incorporated by reference in the Form 10-K, the Proxy Statement is not deemed to be filed as part hereof.    
Amendment Flag false    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001093557