Interim Statement Presentation (Details)	3 Months Ended
	Mar. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Other Commitments, Description	On December 20, 2021, we entered into an Agreement and Plan of Merger (as it may be amended or supplemented from time to time, the "Merger Agreement") with Cedar Acquisition Corporation ("Merger Subsidiary"), which is a wholly owned subsidiary of OC Acquisition LLC ("Parent"), Parent, which is a wholly owned subsidiary of Oracle Corporation ("Oracle"), and (solely with respect to performance of its obligations set forth in certain specified sections thereof) Oracle. Pursuant to the Merger Agreement, on January 19, 2022, Oracle commenced a cash tender offer (the "Offer") to acquire all of the issued and outstanding shares of our common stock for a purchase price of $95.00 per share, net to the holders thereof in cash, without interest and subject to any required tax withholding. If the Offer is completed, Merger Subsidiary will merge with and into Cerner (the "Merger") and we will become a wholly owned indirect subsidiary of Oracle. As a result of the Merger, the shares of our common stock will cease to be publicly held. Completion of the Merger remains subject to certain closing conditions, including receipt of certain regulatory approvals, shareholders holding a majority of the outstanding shares of our common stock tendering their shares in the Offer, and other customary closing conditions. We have agreed to various customary covenants and agreements in the Merger Agreement, including with respect to the operation of our business prior to the closing of the transaction, such as restrictions on making certain acquisitions and divestitures, entering into certain contracts, incurring certain indebtedness and making certain capital expenditures, paying dividends in excess of our regular quarterly dividend, issuing or repurchasing stock and taking other specified actions