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FAIR VALUE MEASUREMENTS (Tables)
6 Months Ended
Jun. 30, 2018
Fair Value Measurements [Abstract]  
Disclosure of fair value measurement of assets
A)    Assets and Liabilities Measured at Fair Value on a Recurring Basis
As at June 30, 2018
Quoted prices in active markets for identical assets

Significant other observable inputs

Significant unobservable inputs

Aggregate fair value

(Level 1)

(Level 2)

(Level 3)

 
Cash and equivalents

$2,085


$—


$—


$2,085

Other investments
63



63

Derivatives




Receivables from provisional copper and gold sales

64


64

 

$2,148


$64


$—


$2,212



B)    Fair Values of Financial Assets and Liabilities 
  
As at June 30, 2018
 
As at December 31, 2017
 
 
Carrying amount

Estimated fair value

Carrying amount

Estimated fair value

Financial assets
 
 
 
 
Other assets1

$559


$559


$572


$572

Other investments2
63

63

33

33

Derivative assets
6

6

3

3

 

$628


$628


$608


$608

Financial liabilities
 
 
 
 
Debt3

$6,392


$7,060


$6,423


$7,715

Derivative liabilities
6

6

32

32

Other liabilities
519

519

252

252

 

$6,917


$7,585


$6,707


$7,999


1 
Includes restricted cash and amounts due from our partners.
2 
Recorded at fair value. Quoted market prices are used to determine fair value.
3 
Debt is generally recorded at amortized cost. The fair value of debt is primarily determined using quoted market prices. Balance includes both current and long-term portions of debt.
Disclosure of fair value measurement of liabilities [text block]
A)    Assets and Liabilities Measured at Fair Value on a Recurring Basis
As at June 30, 2018
Quoted prices in active markets for identical assets

Significant other observable inputs

Significant unobservable inputs

Aggregate fair value

(Level 1)

(Level 2)

(Level 3)

 
Cash and equivalents

$2,085


$—


$—


$2,085

Other investments
63



63

Derivatives




Receivables from provisional copper and gold sales

64


64

 

$2,148


$64


$—


$2,212



B)    Fair Values of Financial Assets and Liabilities 
  
As at June 30, 2018
 
As at December 31, 2017
 
 
Carrying amount

Estimated fair value

Carrying amount

Estimated fair value

Financial assets
 
 
 
 
Other assets1

$559


$559


$572


$572

Other investments2
63

63

33

33

Derivative assets
6

6

3

3

 

$628


$628


$608


$608

Financial liabilities
 
 
 
 
Debt3

$6,392


$7,060


$6,423


$7,715

Derivative liabilities
6

6

32

32

Other liabilities
519

519

252

252

 

$6,917


$7,585


$6,707


$7,999


1 
Includes restricted cash and amounts due from our partners.
2 
Recorded at fair value. Quoted market prices are used to determine fair value.
3 
Debt is generally recorded at amortized cost. The fair value of debt is primarily determined using quoted market prices. Balance includes both current and long-term portions of debt.