Employee-Benefits - Additional Information (Detail)	12 Months Ended
Dec. 31, 2021
Retirement Benefits [Abstract]
Minimum age of employees for defined contribution plan	18 years

Defined contribution plan minimum age of employee.

No definition available.

Name:	tndm_DefinedContributionPlanMinimumAgeOfEmployee
Namespace Prefix:	tndm_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration