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PROPERTY, PLANT, EQUIPMENT AND MINING DEVELOPMENT COSTS, NET (Schedule of PPE) (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 30, 2008 | Dec. 31, 2007
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Property, plant, equipment and mining development costs | $ 37,082,000,000 | $ 35,956,000,000 |  |  |  |
Accumulated depreciation, depletion and amortization | (14,246,000,000) | (12,737,000,000) |  |  |  |
Property, plant, equipment and mining development costs, net | 22,836,000,000 | 23,219,000,000 |  |  |  |
Proven and probable reserves [Member] |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Property, plant, equipment and mining development costs | 3,974,000,000 | 3,863,000,000 |  |  |  |
Transfer From Value Beyond Proven And Probable Reserves To Proven And Probable Reserves | 112,000,000 | 0 |  | $ 640,000,000 |  |
Value beyond proven and probable reserves (VBPP) [Member] |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Payments to Acquire Mineral Rights |  |  |  |  |  | $ 1,600,000,000
Property, plant, equipment and mining development costs | 447,000,000 | 559,000,000 |  |  |  |
Property, Plant and Equipment, Transfers and Changes |  |  |  |  | $ 485,000,000 |
Mine development and other |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Property, plant, equipment and mining development costs | 6,212,000,000 | 5,755,000,000 |  |  |  |
Buildings and infrastructure |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Property, plant, equipment and mining development costs | 7,520,000,000 | 7,479,000,000 |  |  |  |
Machinery and equipment |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Property, plant, equipment and mining development costs | 12,201,000,000 | 11,744,000,000 |  |  |  |
Mobile equipment |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Property, plant, equipment and mining development costs | 3,764,000,000 | 3,725,000,000 |  |  |  |
Construction in progress |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Property, plant, equipment and mining development costs | 2,964,000,000 | 2,831,000,000 |  |  |  |
Discontinued Operations |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Payments to Acquire Mineral Rights |  |  |  |  |  | $ 634,000,000
Mining Operations [Member] |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Capitalized interest | $ 121,000,000 | $ 92,000,000 | $ 157,000,000 |  |  |

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