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IMPAIRMENT, NET OF REVERSALS (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2016 | Dec. 31, 2017 | Dec. 31, 2016
Impairment charges |  |  |
Impairment charge related to property, plant and equipment |  | $ 21.5 | $ 68.3
Reversal of impairment charges |  | 97.0 |
Impairment charge related to inventory and other assets |  |  | 71.3
Impairment, net of reversals |  | 21.5 | 139.6
Tax expense (recovery) on impairment charge |  | (83.6) |
Impairment charge |  | (75.5) | 139.6
Inventory impairment charges |  |  | 71.3
Maricunga |  |  |
Impairment charges |  |  |
Impairment charge | $ 68.3 |  | $ 71.3
Carrying amounts of property, plant and equipment | $ (10.9) |  |
Paracatu |  |  |
Impairment charges |  |  |
Impairment charge related to property, plant and equipment |  | 253.0 |
Tax expense (recovery) on impairment charge |  | (86.0) |
Carrying amounts of property, plant and equipment |  | 1,275.6 |
Tasiast |  |  |
Impairment charges |  |  |
Reversal of impairment charges |  | 142.9 |
Carrying amounts of property, plant and equipment |  | 1,417.5 |
Fort Knox |  |  |
Impairment charges |  |  |
Reversal of impairment charges |  | 88.6 |
Tax expense (recovery) on impairment charge |  | 2.4 |
Carrying amounts of property, plant and equipment |  | $ 420.2 |

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- Definition The amount recognised as a reduction of the carrying amount of an asset or cash-generating unit to its recoverable amount. [Refer: Carrying amount [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2017-01-01 -Paragraph 130 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2017-03-01&anchor=para_130_b&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2017-01-01 -Paragraph 130 -Subparagraph d -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2017-03-01&anchor=para_130_d_ii&doctype=Standard -URIDate 2017-03-09 + Details
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