XML 58 R51.htm IDEA: XBRL DOCUMENT
v3.8.0.1

SUPPLEMENTAL CASH FLOW INFORMATION (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Disclosure Of Supplemental cash flow information [Abstract] |
Detailed information about supplemental cash flow information [Text Block] | Supplemental cash flow information (included within operating activities) is as follows:
| Year ended December 31
(in millions of U.S. dollars) | 2017 | 2016
Change in non-cash operating working capital |  |
Trade and other receivables | 15.1 | (13.9)
Inventories | 2.8 | (8.8)
Prepaid expenses and other | (1.5) | 1.8
Trade and other payables | 24.5 | 0.5
Total change in non-cash operating working capital | 40.9 | (20.3)
| Year ended December 31
(in millions of U.S. dollars) | 2017 | 2016
other Non-cash adjustments |  |
Unrealized loss on share purchase warrants | (1.2) | (0.2)
Unrealized loss on concentrate contracts | 1.9 | 4.5
Equity settled share-based payment expense | 5.7 | 5.4
Gain on disposal of assets | (0.3) | (0.1)
Settlement and loss (gain) on revaluation of gold price option contracts | 13.9 | (10.5)
Unrealized loss on gold stream obligation | 21.8 | 31.1
Unrealized loss on copper forward contracts and copper price option contracts | 4.4 | -
Other non-cash adjustments | 0.2 | (1.9)
Total other non-cash adjustments | 46.4 | 28.3

X
- Definition The detailed information about supplemental cash flow information. + References No definition available. + Details
Name: | ngd_DetailedInformationAboutSupplementalCashFlowInformationTextBlock
Namespace Prefix: | ngd_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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