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FAIR VALUE CHANGES
 6 Months Ended
Jun. 30, 2018
Fair Value Measurement [Abstract]  
Fair value changes
FAIR VALUE CHANGES
Fair value changes recorded in net income represent gains or losses arising from changes in the fair value of assets and liabilities, including derivative financial instruments, accounted for using the fair value method and are comprised of the following:
 
Three Months Ended
 
Six Months Ended
FOR THE PERIODS ENDED JUN. 30
(MILLIONS)
2018

 
2017

 
2018

 
2017

Investment properties
$
394

 
$
412

 
$
864

 
$
389

Transaction related gains, net of deal costs
443

 
26

 
977

 
125

Financial contracts
176

 
(124
)
 
(17
)
 
(314
)
Impairment and provisions
(14
)
 
(36
)
 
(51
)
 
(80
)
Other fair value changes
(166
)
 
(65
)
 
(368
)
 
(111
)
 
$
833

 
$
213

 
$
1,405

 
$
9