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CASH FLOW – OTHER ITEMS (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Cash flow arising from changes in:        
(Gain) loss on non-hedge derivatives $ (1) $ 2 $ (3) $ (2)
Stock-based compensation expense 8 6 10 31
Income from investment in equity investees (10) (14) (26) (25)
Change in estimate of rehabilitation costs at closed mines 9 (3) 0 5
Net inventory impairment charges 2 3 5 6
Change in other assets and liabilities 65 (1) 39 (97)
Settlement of rehabilitation obligations (16) (14) (32) (23)
Other operating activities 57 (21) (7) (105)
Cash flow arising from changes in:        
Accounts receivable (21) 42 45 58
Inventory (72) (154) (148) (231)
Other current assets (15) (50) (77) (94)
Accounts payable (98) (3) (204) (54)
Other current liabilities 12 (17) 14 (57)
Change in working capital $ (194) $ (182) $ (370) $ (378)