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IMPAIRMENT REVERSALS (Tables)
 12 Months Ended
Dec. 31, 2017
Impairment Of Assets [Abstract]  
Impairment (reversals) charges
For the years ended December 31
2017

2016

Impairment reversals of long-lived assets1

($224
)

($250
)
Impairment of intangibles1
12

—

Total

($212
)

($250
)
1 
Refer to note 21 for further details.
The other key assumptions used in our impairment testing, based on the CGUs tested in each year, are summarized in the table below: 
 
2017

2016

Copper price per lb (long-term)

$2.75


$2.75

WACC - gold (range)
3%-11%

3%-6%

WACC - gold (avg)
6
%
4
%
WACC - copper
9
%
9
%
NAV multiple - gold (avg)
1.2

1.2

LOM years - gold (avg)
17

15

Value per ounce of gold
$30 - $55

n/a

Value per ounce of silver
$0.41 - $0.76

n/a

The carrying value of the CGUs that are most sensitive to changes in the key assumptions used in the FVLCD calculation are: 
As at December 31, 2017
Carrying Value
Pueblo Viejo1

$3,077

Veladero2
1,016

Lumwana3
849

Norte Abierto2,4
817

Bulyanhulu3
600

Lagunas Norte5

458

Buzwagi
194

Pascua-Lama3,6,7


$38


1 
This CGU had an impairment loss in 2015. As there have been no indicators of impairment or impairment reversal in 2017, the carrying value would remain sensitive to the key assumptions in the FVLCD model from 2015.
2 
As a result of partial divestments that occurred in 2017 (refer to notes 4a and 4b) these CGUs were remeasured to fair value and are sensitive to changes in the key assumptions used in the purchase price allocations.
3 
As a result of the impairment/reversal recorded in 2017 these CGUs were remeasured to fair value and are sensitive to changes, both positive and negative, in the key assumptions used to calculate the FVLCD.
4 
Norte Abierto is the new name of our joint venture with Goldcorp, comprised of the Cerro Casale and Caspiche deposits.
5 
As a result of the reversal recorded in 2016 this CGU was remeasured to fair value and is sensitive to changes, both positive and negative, in the key assumptions used to calculate the FVLCD.
6 
The carrying value of Pascua-Lama includes the deferred revenue liability relating to the Wheaton Precious Metals stream ($812 million).
7 
This CGU is most sensitive to changes in the value per ounce of comparable market entities.
Other results of the sensitivity analysis are as follows:
 
(Impairment)/reversal based on
Operating Segment
Gold price
Gold price
+$100
-$100
Pueblo Viejo
$546
($651)
Lagunas Norte
-
(311)
Veladero
-
(188)
For the year ended December 31, 2017, we recorded net impairment reversals of $212 million (2016: $250 million) for non-current assets, as summarized in the following table:
For the years ended December 31
2017

2016

Cerro Casale

($1,120
)

$—

Lumwana
(259
)
—

Bulyanhulu
740

—

Veladero
—

(275
)
Lagunas Norte
3

(28
)
Pascua-Lama
407

—

Zaldívar
—

49

Exploration sites
12

—

Other
5

4

Total impairment (reversals) of long-lived assets

($212
)

($250
)