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Cover Page - USD ($)
$ in Billions
 12 Months Ended
Dec. 28, 2019
Feb. 08, 2020
Jun. 29, 2019
Cover page.      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 28, 2019    
Document Transition Report false    
Entity File Number 001-37482    
Entity Registrant Name Kraft Heinz Co    
Entity Incorporation, State DE    
Entity Tax Identification Number 46-2078182    
Entity Address, Address Line One PPG Place,    
Entity Address, City Pittsburgh,    
Entity Address, State PA    
Entity Address, Postal Zip Code 15222    
City Area Code 412    
Local Phone Number 456-5700    
Title of 12(b) Security Common stock, $0.01 par value    
Trading Symbol KHC    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 19
Entity Common Stock, Shares Outstanding   1,221,399,549  
Documents Incorporated by Reference
Portions of the registrant's definitive proxy statement to be filed with the Securities and Exchange Commission in connection with its annual meeting of shareholders expected to be held on May 7, 2020 are incorporated by reference into Part III hereof.
    
Amendment Flag false    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001637459    
Current Fiscal Year End Date --12-28