| Component: (Network and Table) | |
|---|---|
| Network | 138 - Disclosure - Financial Statement Details - Accounts Receivable (Detail) (http://www.dexcom.com/taxonomy/role/DisclosureFinancialStatementDetailsAccountsReceivable) |
| Table | Financial Statement Details [Table] |
| Reporting Entity [Axis] | 0001093557 (http://www.sec.gov/CIK) |
| Legal Entity [Axis] | Entity [Domain] |
| Financial Statement Details [Line Items] | Period [Axis] | |
|---|---|---|
2012-12-31 | 2011-12-31 | |
Accounts receivable | 20,700,000 | 13,200,000 |
Less allowance for doubtful accounts, sales returns and discounts | (1,200,000) | (700,000) |
Total | 19,500,000 | 12,500,000 |