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SEGMENT INFORMATION - Consolidated Statements of Income Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure of operating segments [line items]    
Revenue $ 7,243 $ 8,374
Depreciation 1,457 1,647
Exploration, evaluation and project expenses 383 354
Other expenses (income) 90 (799)
Net (loss) income (1,435) 1,516
Accretion 87 67
Share of income (loss) 110 78
Cost of sales (excluding depreciation) 5,220 5,300
Pierina    
Disclosure of operating segments [line items]    
Cost of sales (excluding depreciation) 116 174
Pueblo Viejo    
Disclosure of operating segments [line items]    
Revenue, attributable to non-controlling interests 535 567
Cost of sales, attributable to non-controlling interests 289 285
Share of income (loss) 237 276
Acacia Mining PLC    
Disclosure of operating segments [line items]    
Revenue, attributable to non-controlling interests 240 271
Cost of sales, attributable to non-controlling interests 164 169
Share of income (loss) 63 69
Operating segments    
Disclosure of operating segments [line items]    
Revenue 7,243 8,374
Direct mining, royalties and community relations 3,755 3,624
Depreciation 1,434 1,619
Exploration, evaluation and project expenses 150 168
Other expenses (income) 95 157
Net (loss) income 1,809 2,806
Accretion 74 55
Operating segments | Barrick Nevada    
Disclosure of operating segments [line items]    
Revenue 2,655 2,961
Direct mining, royalties and community relations 1,066 1,076
Depreciation 649 793
Exploration, evaluation and project expenses 36 24
Other expenses (income) 14 16
Net (loss) income 890 1,052
Operating segments | Pueblo Viejo    
Disclosure of operating segments [line items]    
Revenue 1,333 1,417
Direct mining, royalties and community relations 547 501
Depreciation 185 229
Exploration, evaluation and project expenses 21 0
Other expenses (income) 1 16
Net (loss) income 579 671
Operating segments | Lagunas Norte    
Disclosure of operating segments [line items]    
Revenue 332 514
Direct mining, royalties and community relations 291 177
Depreciation 46 68
Exploration, evaluation and project expenses 2 4
Other expenses (income) 6 6
Net (loss) income (13) 259
Operating segments | Veladero    
Disclosure of operating segments [line items]    
Revenue 366 591
Direct mining, royalties and community relations 189 291
Depreciation 121 119
Exploration, evaluation and project expenses 2 3
Other expenses (income) 1 5
Net (loss) income 53 173
Operating segments | Turquoise Ridge    
Disclosure of operating segments [line items]    
Revenue 331 280
Direct mining, royalties and community relations 178 131
Depreciation 28 28
Exploration, evaluation and project expenses 0 0
Other expenses (income) (1) 2
Net (loss) income 126 119
Operating segments | Acacia Mining PLC    
Disclosure of operating segments [line items]    
Revenue 664 751
Direct mining, royalties and community relations 367 362
Depreciation 89 107
Exploration, evaluation and project expenses 0 0
Other expenses (income) 37 91
Net (loss) income 171 191
Operating segments | Pascua-Lama    
Disclosure of operating segments [line items]    
Revenue 0 0
Direct mining, royalties and community relations 0 0
Depreciation 11 8
Exploration, evaluation and project expenses 77 125
Other expenses (income) 7 (10)
Net (loss) income (95) (123)
Operating segments | Other    
Disclosure of operating segments [line items]    
Revenue 1,562 1,860
Direct mining, royalties and community relations 1,117 1,086
Depreciation 305 267
Exploration, evaluation and project expenses 12 12
Other expenses (income) 30 31
Net (loss) income $ 98 $ 464