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Consolidated Statements of Cash Flow - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
OPERATING ACTIVITIES    
Net income (loss) $ 4,574 $ (1,435)
Adjustments for the following items:    
Depreciation 2,032 1,457
Finance costs (note 14) 500 560
Impairment (reversals) charges (note 10) (1,423) 900
Income tax expense (note 12) 1,783 1,198
Loss on currency translation 109 136
Gain on sale of non-current assets (note 9) (441) (68)
Remeasurement of Turquoise Ridge to fair value (note 4) (1,886) 0
Change in working capital (note 15) (357) (173)
Other operating activities (note 15) (1,113) (62)
Operating cash flows before interest and income taxes 3,778 2,513
Interest paid (333) (350)
Income taxes paid (612) (398)
Net cash provided by operating activities 2,833 1,765
INVESTING ACTIVITIES    
Capital expenditures (note 5) (1,701) (1,400)
Sales proceeds 41 70
Divestitures (note 4) 750 0
Investment purchases (4) (159)
Cash acquired in merger (note 4) 751 0
Other investing activities (note 15) 213 (5)
Net cash provided by (used in) investing activities 50 (1,494)
FINANCING ACTIVITIES    
Lease repayments (28) 0
Debt repayments (281) (687)
Dividends (note 31) (548) (125)
Funding from non-controlling interests (note 32) 140 24
Disbursements to non-controlling interests (note 32) (421) (108)
Other inflows (outflows) of cash, classified as financing activities (1) (29)
Net cash used in financing activities (1,139) (925)
Effect of exchange rate changes on cash and equivalents (1) (9)
Net increase (decrease) in cash and equivalents 1,743 (663)
Cash and equivalents at beginning of year (note 25a) 1,571 2,234
Cash and equivalents at the end of year $ 3,314 $ 1,571