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Cover
 12 Months Ended
Dec. 31, 2020
shares
Entity Addresses [Line Items]  
Document Type 40-F
Document Registration Statement false
Document Annual Report true
Document Period End Date Dec. 31, 2020
Document Fiscal Year Focus 2020
Entity File Number 1-9059
Entity Registrant Name BARRICK GOLD CORP
Entity Incorporation, State or Country Code A1
Entity Primary SIC Number 1041
Entity Address, Address Line One Suite 3700
Entity Address, Address Line Two 161 Bay Street
Entity Address, Address Line Three P.O. Box 212
Entity Address, City or Town Toronto
Entity Address, State or Province ON
Entity Address, Country CA
Entity Address, Postal Zip Code M5J 2S1
City Area Code 800
Local Phone Number 720-7415
Annual Information Form true
Audited Annual Financial Statements true
Entity Common Stock, Shares Outstanding (shares) 1,778,189,894
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Emerging Growth Company false
Entity Central Index Key 0000756894
Current Fiscal Year End Date --12-31
Document Fiscal Period Focus FY
Amendment Flag false
Business Contact [Member]  
Entity Addresses [Line Items]  
Entity Address, Address Line One 310 South Main Street
Entity Address, Address Line Two Suite 1150
Entity Address, City or Town Salt Lake City
Entity Address, State or Province UT
Entity Address, Postal Zip Code 84101
City Area Code 801
Local Phone Number 990-3745
Contact Personnel Name Barrick Gold of North America, Inc.