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Consolidated Statements of Comprehensive Income - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Statement of comprehensive income [abstract]        
Net (loss) income $ (76) $ 1,137 $ 116 $ 2,026
Movement in equity investments fair value reserve:        
Net unrealized change on equity investments, net of tax $nil, $nil, $nil and $nil (4) 3 (8) 4
Items that may be reclassified subsequently to profit or loss:        
Unrealized gains (losses) on derivatives designated as cash flow hedges, net of tax ($3), $3, ($6) and $3 4 (8) 10 (20)
Realized losses on derivatives designated as cash flow hedges, net of tax $nil, ($2), $nil and ($2) 0 7 0 8
Actuarial gain (loss) on post employment benefit obligations, net of tax $nil, $nil, $nil and $nil 1 0 1 0
Currency translation adjustments, net of tax $nil, $nil, $nil and $nil 2 4 2 15
Total other comprehensive income 3 6 5 7
Total comprehensive (loss) income (73) 1,143 121 2,033
Attributable to:        
Equity holders of Barrick Gold Corporation (91) 1,090 69 1,770
Non-controlling interests $ 18 $ 53 $ 52 $ 263