DEI Document - USD ($)	12 Months Ended
	Dec. 31, 2018	Jan. 31, 2019	Jun. 30, 2018
Entity Information [Line Items]
Entity Registrant Name	ICU MEDICAL INC/DE
Entity Central Index Key	0000883984
Document Type	10-K
Document Period End Date	Dec. 31, 2018
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		20,498,949
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Entity Well-Known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Public Float			$ 5,575,024,829