XML 53 R46.htm IDEA: XBRL DOCUMENT
v3.8.0.1

DERIVATIVE INSTRUMENTS (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Derivative instruments [Abstract] |
Detailed information about derivative assets and derivative liabilities [text block] |
| As at December 31
(in millions of U.S. dollars) |  |  | 2017 | 2016
DERIVATIVE ASSETS |  |  |  |
Gold price option contracts |  |  | - | 17.6
Diesel swap contracts |  |  | - | 0.1
Copper forward contracts |  |  | - | 0.3
Total derivative assets |  |  | - | 18.0
DERIVATIVE LIABILITIES |  |  |  |
Share purchase warrants(1) |  |  | - | 1.3
Unsettled provisionally priced concentrate derivatives, and swap contracts(2) |  | 1.9 | 4.5
Copper price option contracts(3) |  |  | 4.1 | -
Total derivative liabilities |  |  | 6.0 | 5.8
| 1. | On June 28, 2017, New Gold’s share purchase warrants expired, unexercised. As at December 31, 2016, share purchase warrants were included in trade and other payables.
| 2. | Unsettled provisionally priced concentrate derivatives are included within trade and other receivables in the statement of financial position.
| 3. | Copper price option contracts are included within trade and other payables in the statement of financial position.
Disclosure of detailed information about hedging instruments [text block] |
| Year ended December 31
(in millions of U.S. dollars) |  |  | 2017 | 2016
Effective portion of change in fair value of hedging instruments |  |  |  |
Foreign exchange gain on cash and cash equivalents designated as hedging instruments | - | 4.9
Reclassification of realized foreign exchange gain on cash and cash equivalents designated as hedging instrument | - | 3.2
Unrealized (loss) gain on diesel swap contracts (i) |  |  | (0.4) | 1.2
Realized loss on settlement of diesel swap contracts (i) |  |  | 0.3 | 2.5
Deferred income tax related to hedging instruments |  |  | - | (1.5)
Total hedging gains (losses) in other comprehensive income |  |  | (0.1) | 10.3
Detailed information about the realised and unrealised gainlosses on provisionally priced sales [text block] | The following tables summarize the realized and unrealized gains (losses) on provisionally priced sales:
Year ended December 31, 2017
(in millions of U.S. dollars) |  |  |  | Gold | Copper | Total
Gain (LOSS) on the provisional pricing of concentrate sales
Realized |  |  |  | 1.9 | 10.0 | 11.9
Unrealized |  |  |  | 0.1 | 4.1 | 4.2
Total gain (loss) |  |  |  | 2.0 | 14.1 | 16.1
Year ended December 31, 2016
(in millions of U.S. dollars) |  |  |  | Gold | Copper | Total
(Loss) Gain on the provisional pricing of concentrate sales
Realized |  |  |  | 2.8 | 6.8 | 9.6
Unrealized |  |  |  | (1.5) | 6.0 | 4.5
Total (loss) gain |  |  |  | 1.3 | 12.8 | 14.1
Detailed information about the realised and unrealised gainlosses on gold and copper swap contracts [text block] | The following tables summarize the realized and unrealized gains (losses) on gold and copper swap contracts:
Year ended December 31, 2017
(in millions of U.S. dollars) |  |  |  | Gold | Copper | Total
Gain (loss) on swap contracts
Realized |  |  |  | (2.0) | (16.8) | (18.8)
Unrealized |  |  |  | (0.3) | (5.8) | (6.1)
Total gain (loss) |  |  |  | (2.3) | (22.6) | (24.9)
Year ended December 31, 2016
(in millions of U.S. dollars) |  |  |  | Gold | Copper | Total
Gain (loss) on swap contracts
Realized |  |  |  | (2.6) | (4.1) | (6.7)
Unrealized |  |  |  | 1.4 | (10.3) | (8.9)
Total gain (loss) |  |  |  | (1.2) | (14.4) | (15.6)
Detailed information about the net exposure to the impact of movements in market commodity prices for provisionally priced sales [text block] | The following table summarizes the net exposure to the impact of movements in market commodity prices for provisionally priced sales:
As at December 31
|  |  | 2017 | 2016
Volumes subject to final pricing net of outstanding swaps |  |  |  |
Gold ounces (000s) |  |  | 2.0 | 4.0
Copper pounds (millions) |  |  | 1.6 | 3.0
Detailed information about the remaining contracts of metal option [Text Block] |
| Quant ity outstanding | Remaining term | Exercise price ($/lb) | Fair value - asset (liability) (1)
COPPER price option contracts outstanding |  |  |
Copper call contracts - sold | 27,600 tonnes | January – December 2018 | 3.37 | (7.8)
Copper put contracts - purchased | 27,600 tonnes | January – December 2018 | 3.00 | 3.7
| 1. | The Company presents the fair value of its put and call options on a net basis on the consolidated statements of financial position. The Company has a legally enforceable right to set off the amounts under its option contracts and intends to settle on a net basis.

X
- Definition The disclosure of detailed information about hedging instruments. [Refer: Hedging instruments [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2018-01-01 -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 24A -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_24A&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | ngd_DerivativeInstrumentsAbstract
Namespace Prefix: | ngd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of detailed information about derivative assets and derivative liabilities. + References No definition available. + Details
Name: | ngd_DetailedInformationAboutDerivativeAssetsAndDerivativeLiabilitiesTextBlock
Namespace Prefix: | ngd_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The detailed information about the net exposure to the impact of movements in market commodity prices for provisionally priced sales. + References No definition available. + Details
Name: | ngd_DetailedInformationAboutNetExposureToImpactOfMovementsInMarketCommodityPricesForProvisionallyPricedSalesTextBlock
Namespace Prefix: | ngd_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of detailed information about the realised and unrealised gains(losses) on gold and copper swap contracts. + References No definition available. + Details
Name: | ngd_DetailedInformationAboutRealisedAndUnrealisedGainlossesOnGoldAndCopperSwapContractsTextBlock
Namespace Prefix: | ngd_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of detailed information about the realised and unrealised gainlosses on provisionally priced sales. + References No definition available. + Details
Name: | ngd_DetailedInformationAboutRealisedAndUnrealisedGainlossesOnProvisionallyPricedSalesTextBlock
Namespace Prefix: | ngd_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The detailed information about the remaining contracts of metal option. + References No definition available. + Details
Name: | ngd_DetailedInformationAboutRemainingContractsOfMetalOptionTextBlock
Namespace Prefix: | ngd_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration