{"cik":1093557,"taxonomy":"us-gaap","tag":"EarningsPerShareBasicAndDiluted","label":"Earnings Per Share, Basic and Diluted","description":"The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.","entityName":"DEXCOM, INC.","units":{"USD/shares":[{"start":"2009-01-01","end":"2009-12-31","val":-1.21,"accn":"0001193125-12-075640","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2009"},{"start":"2010-01-01","end":"2010-03-31","val":-0.4,"accn":"0001193125-12-075640","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":-0.59,"accn":"0001193125-11-208448","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-03"},{"start":"2010-04-01","end":"2010-06-30","val":-0.2,"accn":"0001193125-11-208448","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-03"},{"start":"2010-04-01","end":"2010-06-30","val":-0.2,"accn":"0001193125-12-075640","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":-0.81,"accn":"0001193125-11-293031","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-02"},{"start":"2010-07-01","end":"2010-09-30","val":-0.23,"accn":"0001193125-11-293031","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-02"},{"start":"2010-07-01","end":"2010-09-30","val":-0.23,"accn":"0001193125-12-075640","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":-0.97,"accn":"0001193125-12-075640","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2010-01-01","end":"2010-12-31","val":-0.97,"accn":"0001193125-13-069590","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-21","frame":"CY2010"},{"start":"2010-10-01","end":"2010-12-31","val":-0.16,"accn":"0001193125-12-075640","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23","frame":"CY2010Q4"},{"start":"2011-01-01","end":"2011-03-31","val":-0.19,"accn":"0001193125-12-075640","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-03-31","val":-0.19,"accn":"0001193125-12-205110","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-02"},{"start":"2011-01-01","end":"2011-03-31","val":-0.19,"accn":"0001193125-13-069590","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-21","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":-0.3,"accn":"0001193125-11-208448","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-03"},{"start":"2011-01-01","end":"2011-06-30","val":-0.3,"accn":"0001193125-12-338041","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-06"},{"start":"2011-04-01","end":"2011-06-30","val":-0.11,"accn":"0001193125-11-208448","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-03"},{"start":"2011-04-01","end":"2011-06-30","val":-0.11,"accn":"0001193125-12-075640","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-04-01","end":"2011-06-30","val":-0.11,"accn":"0001193125-12-338041","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-06"},{"start":"2011-04-01","end":"2011-06-30","val":-0.11,"accn":"0001193125-13-069590","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-21","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":-0.5,"accn":"0001193125-11-293031","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-02"},{"start":"2011-01-01","end":"2011-09-30","val":-0.5,"accn":"0001193125-12-446973","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":-0.2,"accn":"0001193125-11-293031","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-02"},{"start":"2011-07-01","end":"2011-09-30","val":-0.2,"accn":"0001193125-12-075640","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-07-01","end":"2011-09-30","val":-0.2,"accn":"0001193125-12-446973","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-07-01","end":"2011-09-30","val":-0.2,"accn":"0001193125-13-069590","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-21","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":-0.68,"accn":"0001193125-12-075640","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-01-01","end":"2011-12-31","val":-0.68,"accn":"0001193125-13-069590","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-21"},{"start":"2011-01-01","end":"2011-12-31","val":-0.68,"accn":"0001093557-14-000028","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-20","frame":"CY2011"},{"start":"2011-10-01","end":"2011-12-31","val":-0.18,"accn":"0001193125-12-075640","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-23"},{"start":"2011-10-01","end":"2011-12-31","val":-0.18,"accn":"0001193125-13-069590","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-21","frame":"CY2011Q4"},{"start":"2012-01-01","end":"2012-03-31","val":-0.21,"accn":"0001193125-12-205110","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-02"},{"start":"2012-01-01","end":"2012-03-31","val":-0.21,"accn":"0001193125-13-069590","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-21"},{"start":"2012-01-01","end":"2012-03-31","val":-0.21,"accn":"0001093557-13-000036","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-01"},{"start":"2012-01-01","end":"2012-03-31","val":-210000,"accn":"0001093557-14-000028","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-20","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":-0.42,"accn":"0001193125-12-338041","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-06"},{"start":"2012-01-01","end":"2012-06-30","val":-0.42,"accn":"0001093557-13-000083","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-07"},{"start":"2012-04-01","end":"2012-06-30","val":-0.21,"accn":"0001193125-12-338041","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-06"},{"start":"2012-04-01","end":"2012-06-30","val":-0.21,"accn":"0001193125-13-069590","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-21"},{"start":"2012-04-01","end":"2012-06-30","val":-0.21,"accn":"0001093557-13-000083","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-07"},{"start":"2012-04-01","end":"2012-06-30","val":-210000,"accn":"0001093557-14-000028","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-20","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":-0.67,"accn":"0001193125-12-446973","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":-0.67,"accn":"0001093557-13-000116","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-06"},{"start":"2012-07-01","end":"2012-09-30","val":-0.25,"accn":"0001193125-12-446973","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-07-01","end":"2012-09-30","val":-0.25,"accn":"0001193125-13-069590","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-21"},{"start":"2012-07-01","end":"2012-09-30","val":-0.25,"accn":"0001093557-13-000116","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-06"},{"start":"2012-07-01","end":"2012-09-30","val":-250000,"accn":"0001093557-14-000028","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-20","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":-0.79,"accn":"0001193125-13-069590","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-21"},{"start":"2012-01-01","end":"2012-12-31","val":-0.79,"accn":"0001093557-14-000028","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-20"},{"start":"2012-01-01","end":"2012-12-31","val":-0.79,"accn":"0001093557-15-000040","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-25","frame":"CY2012"},{"start":"2012-10-01","end":"2012-12-31","val":-0.12,"accn":"0001193125-13-069590","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-21"},{"start":"2012-10-01","end":"2012-12-31","val":-120000,"accn":"0001093557-14-000028","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-20","frame":"CY2012Q4"},{"start":"2013-01-01","end":"2013-03-31","val":-0.16,"accn":"0001093557-13-000036","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-01"},{"start":"2013-01-01","end":"2013-03-31","val":-160000,"accn":"0001093557-14-000028","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-20"},{"start":"2013-01-01","end":"2013-03-31","val":-0.16,"accn":"0001093557-14-000137","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-01"},{"start":"2013-01-01","end":"2013-03-31","val":0,"accn":"0001093557-15-000040","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-25","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":-0.3,"accn":"0001093557-13-000083","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-07"},{"start":"2013-04-01","end":"2013-06-30","val":-0.14,"accn":"0001093557-13-000083","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-07"},{"start":"2013-04-01","end":"2013-06-30","val":-140000,"accn":"0001093557-14-000028","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-20"},{"start":"2013-04-01","end":"2013-06-30","val":0,"accn":"0001093557-15-000040","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-25","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":-0.38,"accn":"0001093557-13-000116","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-06"},{"start":"2013-07-01","end":"2013-09-30","val":-0.08,"accn":"0001093557-13-000116","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-06"},{"start":"2013-07-01","end":"2013-09-30","val":-80000,"accn":"0001093557-14-000028","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-20"},{"start":"2013-07-01","end":"2013-09-30","val":0,"accn":"0001093557-15-000040","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-25","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":-0.42,"accn":"0001093557-14-000028","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-20"},{"start":"2013-01-01","end":"2013-12-31","val":-0.42,"accn":"0001093557-15-000040","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-25"},{"start":"2013-01-01","end":"2013-12-31","val":-0.42,"accn":"0001093557-16-000432","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-23","frame":"CY2013"},{"start":"2013-10-01","end":"2013-12-31","val":-40000,"accn":"0001093557-14-000028","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-20"},{"start":"2013-10-01","end":"2013-12-31","val":0,"accn":"0001093557-15-000040","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-25","frame":"CY2013Q4"},{"start":"2014-01-01","end":"2014-03-31","val":-0.17,"accn":"0001093557-14-000137","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-01","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-12-31","val":-0.3,"accn":"0001093557-15-000040","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-25"},{"start":"2014-01-01","end":"2014-12-31","val":-0.3,"accn":"0001093557-16-000432","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-23"},{"start":"2014-01-01","end":"2014-12-31","val":-0.3,"accn":"0001093557-17-000048","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":-0.72,"accn":"0001093557-16-000432","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-23"},{"start":"2015-01-01","end":"2015-12-31","val":-0.72,"accn":"0001093557-17-000048","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"start":"2015-01-01","end":"2015-12-31","val":-0.72,"accn":"0001093557-18-000018","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-27","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":-0.23,"accn":"0001093557-18-000018","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-27","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":-0.48,"accn":"0001093557-17-000171","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-01"},{"start":"2016-04-01","end":"2016-06-30","val":-0.24,"accn":"0001093557-17-000171","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-01"},{"start":"2016-04-01","end":"2016-06-30","val":-0.24,"accn":"0001093557-18-000018","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-27","frame":"CY2016Q2"},{"start":"2016-01-01","end":"2016-09-30","val":-0.7,"accn":"0001093557-17-000221","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-01"},{"start":"2016-07-01","end":"2016-09-30","val":-0.22,"accn":"0001093557-17-000221","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-01"},{"start":"2016-07-01","end":"2016-09-30","val":-0.22,"accn":"0001093557-18-000018","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-27","frame":"CY2016Q3"},{"start":"2016-01-01","end":"2016-12-31","val":-0.78,"accn":"0001093557-17-000048","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-28"},{"start":"2016-01-01","end":"2016-12-31","val":-0.78,"accn":"0001093557-18-000018","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-27"},{"start":"2016-01-01","end":"2016-12-31","val":-0.78,"accn":"0001093557-19-000041","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-21","frame":"CY2016"},{"start":"2016-10-01","end":"2016-12-31","val":-0.09,"accn":"0001093557-18-000018","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-27","frame":"CY2016Q4"},{"start":"2017-01-01","end":"2017-03-31","val":-0.49,"accn":"0001093557-18-000018","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-27"},{"start":"2017-01-01","end":"2017-03-31","val":-0.49,"accn":"0001093557-18-000084","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-02","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":-0.45,"accn":"0001093557-17-000171","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-01"},{"start":"2017-04-01","end":"2017-06-30","val":0.03,"accn":"0001093557-17-000171","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-01"},{"start":"2017-04-01","end":"2017-06-30","val":0.03,"accn":"0001093557-18-000018","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-27","frame":"CY2017Q2"},{"start":"2017-01-01","end":"2017-09-30","val":-0.47,"accn":"0001093557-17-000221","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-01"},{"start":"2017-07-01","end":"2017-09-30","val":-0.02,"accn":"0001093557-17-000221","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-01"},{"start":"2017-07-01","end":"2017-09-30","val":-0.02,"accn":"0001093557-18-000018","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-27","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":-0.58,"accn":"0001093557-18-000018","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-27"},{"start":"2017-01-01","end":"2017-12-31","val":-0.58,"accn":"0001093557-19-000041","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-21","frame":"CY2017"},{"start":"2017-10-01","end":"2017-12-31","val":-0.11,"accn":"0001093557-18-000018","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-27","frame":"CY2017Q4"},{"start":"2018-01-01","end":"2018-03-31","val":-0.28,"accn":"0001093557-18-000084","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-02"},{"start":"2018-01-01","end":"2018-03-31","val":-0.28,"accn":"0001093557-19-000119","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-01","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-12-31","val":-1.44,"accn":"0001093557-19-000041","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-21","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":-0.3,"accn":"0001093557-19-000119","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-01","frame":"CY2019Q1"}]}}