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INTANGIBLE ASSETS (Tables)
 6 Months Ended
Jun. 30, 2020
Intangible Assets [Abstract]  
Disclosure of detailed information about intangible assets
 
As of
US$ MILLIONS
June 30, 2020
 
December 31, 2019
Cost
$
3,326

 
$
4,479

Accumulated amortization
(477
)
 
(543
)
Total
$
2,849

 
$
3,936

Intangible assets are allocated to the following cash generating units:
 
As of
US$ MILLIONS
June 30, 2020
 
December 31, 2019
Brazilian regulated gas transmission operation
$
2,805

 
$
3,885

U.K. regulated distribution operation
44

 
51

Total
$
2,849

 
$
3,936
Disclosure of reconciliation of changes in intangible assets and goodwill
The following table presents the accumulated amortization for the company’s intangible assets:
US$ MILLIONS
For the six-month period ended June 30, 2020
 
For the 12 month period ended December 31, 2019
Accumulated amortization at beginning of the period
$
(543
)
 
$
(364
)
Amortization
(80
)
 
(195
)
Foreign currency translation
146

 
16

Ending Balance
$
(477
)
 
$
(543
)

The following table presents the change in the cost balance of intangible assets:
US$ MILLIONS
For the six-month period ended June 30, 2020
 
For the 12 month period ended December 31, 2019
Cost at beginning of the period
$
4,479

 
$
4,631

Additions, net of disposals
16

 
21

Foreign currency translation
(1,169
)
 
(173
)
Ending Balance
$
3,326

 
$
4,479