Share-Based Compensation (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for awards	11,400,000
Typical vesting period for option awards	5 years
Contractual term of options	10 years
Associate stock purchase plan discount	15.00%
Authorized preferred shares	1,000,000
Par value per share of preferred stock	$ 0.01
Stock Repurchase Program, Authorized Amount	$ 217,000,000	$ 170,000,000
Stock Repurchased During Period, Shares	3,600,000
Payments for Repurchase of Common Stock	170,042,000	0	0
Common Stock, Shares Authorized	500,000,000	500,000,000
Increase in authorized common shares	Effective May 24, 2013, we amended our Second Restated Certificate of Incorporation of Cerner Corporation to increase the number of authorized shares of our common stock from 250,000,000 to 500,000,000 shares.
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost	121,600,000
Period of recognition for remaining share-based compensation expense	3 years 2 months 18 days
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost	11,400,000
Period of recognition for remaining share-based compensation expense	1 year 5 months 25 days
Treasury Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payments for Repurchase of Common Stock	$ 170,000,000