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Consolidated Statements of Comprehensive Income - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Statement of comprehensive income [abstract]    
Net income $ 1,516 $ 861
Items that may be reclassified subsequently to profit or loss:    
Unrealized gains (losses) on derivatives designated as cash flow hedges, net of tax $3 and ($9) (16) 16
Realized (gains) losses on derivatives designated as cash flow hedges, net of tax ($9) and ($8) 23 64
Currency translation adjustments, net of tax $nil and $nil 9 95
Items that will not be reclassified to profit or loss:    
Actuarial gain (loss) on post-employment benefit obligations, net of tax ($6) and ($4) 18 7
Net change on equity investments, net of tax $nil and $nil 4 6
Total other comprehensive income 38 188
Total comprehensive income 1,554 1,049
Attributable to:    
Equity holders of Barrick Gold Corporation 1,476 843
Non-controlling interests $ 78 $ 206