Document And Entity Information - shares	6 Months Ended
	Jul. 02, 2016	Jul. 21, 2016
Entity Information [Line Items]
Entity Registrant Name	CERNER CORP /MO/
Entity Central Index Key	0000804753
Document Type	10-Q
Document Period End Date	Jul. 02, 2016
Amendment Flag	false
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		337,709,268