XML 125 R118.htm IDEA: XBRL DOCUMENT
v3.8.0.1

SEGMENTED INFORMATION (Details 3) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Segmented information [Line Items] |  |  |  |  |
Revenue |  | $ 604.4 |  | $ 522.8 |
Customers [Member] |  |  |  |  |
Segmented information [Line Items] |  |  |  |  |
Revenue | [1] | 474.8 |  | 371.9 |
Mesquite [Member] |  |  |  |  |
Segmented information [Line Items] |  |  |  |  |
Revenue |  | 215.7 | [2] | 141.7 | [3]
Mesquite [Member] | Customers one [Member] |  |  |  |  |
Segmented information [Line Items] |  |  |  |  |
Revenue | [4] | 210.8 |  | 138.7 | [5]
Cerro San Pedro [Member] |  |  |  |  |
Segmented information [Line Items] |  |  |  |  |
Revenue |  | 52.4 | [2] | 93.9 | [3]
Cerro San Pedro [Member] | Customers one [Member] |  |  |  |  |
Segmented information [Line Items] |  |  |  |  |
Revenue | [4] | 4.4 |  | 34.1 |
New Afton [Member] |  |  |  |  |
Segmented information [Line Items] |  |  |  |  |
Revenue |  | 302.0 | [2] | 287.2 | [3]
New Afton [Member] | Customers two [Member] |  |  |  |  |
Segmented information [Line Items] |  |  |  |  |
Revenue |  | 125.5 |  | 99.8 |
New Afton [Member] | Customers three [Member] |  |  |  |  |
Segmented information [Line Items] |  |  |  |  |
Revenue |  | 99.8 |  | 99.3 |
Rainy River [Member] |  |  |  |  |
Segmented information [Line Items] |  |  |  |  |
Revenue |  | 34.3 | [2] | 0.0 | [3]
Rainy River [Member] | Customers one [Member] |  |  |  |  |
Segmented information [Line Items] |  |  |  |  |
Revenue | [4] | $ 34.3 |  | $ 0.0 |
[1] | Amounts presented exclude sales generated from Peak Mines, which has been classified as a discontinued operation for the year ended December 31, 2017.
[2] | Segmented revenue reported above represents revenue generated from external customers. There were no inter-segment sales in the year ended December 31, 2017.
[3] | Segmented revenue reported above represents revenue generated from external customers. There were no inter-segment sales in the year ended December 31, 2016.
[4] | Mesquite, Rainy River and Cerro San Pedro all sell to the same customer.
[5] | 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 income arising in the course of an entity's ordinary activities. Income is increases in economic benefits during the accounting period in the form of inflows or enhancements of assets or decreases of liabilities that result in an increase in equity, other than those relating to contributions from equity participants. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2017-01-01 -Paragraph 28 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2017-03-01&anchor=para_28_a&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2017-01-01 -Paragraph 23 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2017-03-01&anchor=para_23_a&doctype=Standard -URIDate 2017-03-09 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2017-01-01 -Paragraph 32 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2017-03-01&anchor=para_32&doctype=Standard -URIDate 2017-03-09 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2017-01-01 -Paragraph 33 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2017-03-01&anchor=para_33_a&doctype=Standard -URIDate 2017-03-09 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2017-01-01 -Paragraph 34 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2017-03-01&anchor=para_34&doctype=Standard -URIDate 2017-03-09 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 82 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_82_a&doctype=Standard -URIDate 2017-03-09 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 103 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_103&doctype=Standard -URIDate 2017-03-09 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2018-01-01 -Name IAS -Number 18 -IssueDate 2017-01-01 -Paragraph 35 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=18&date=2017-03-02&anchor=para_35_b&doctype=Standard&book=B -URIDate 2017-03-09 Reference 9: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 102 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_102&doctype=Standard -URIDate 2017-03-09 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2017-01-01 -Paragraph B12 -Subparagraph b -Clause v -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2017-03-01&anchor=para_B12_b_v&doctype=Appendix&seq=2 -URIDate 2017-03-09 Reference 11: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 12 -IssueDate 2017-01-01 -Paragraph B10 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2017-03-01&anchor=para_B10_b&doctype=Appendix&seq=2 -URIDate 2017-03-09 + Details
Name: | ifrs-full_Revenue
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The disclosure of detailed information about reportable operating segments. + References No definition available. + Details
Name: | ngd_SegmentedInformationLineItems
Namespace Prefix: | ngd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_MajorCustomersAxis=ngd_CustomerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SegmentsAxis=ngd_MesquiteMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MajorCustomersAxis=ngd_CustomersOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SegmentsAxis=ngd_CerroSanPedroMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SegmentsAxis=ngd_NewAftonMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MajorCustomersAxis=ngd_CustomersTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MajorCustomersAxis=ngd_CustomersThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SegmentsAxis=ngd_RainyRiverMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |