Document And Entity Information	9 Months Ended
	Sep. 27, 2014	Oct. 17, 2014
Entity Information [Line Items]
Entity Registrant Name	CERNER CORP /MO/
Entity Central Index Key	0000804753
Document Type	10-Q
Document Period End Date	Sep. 27, 2014
Amendment Flag	false
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--01-03
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		341,472,242