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INTANGIBLE ASSETS (Tables)
 6 Months Ended
Jun. 30, 2021
Intangible Assets [Abstract]  
Disclosure of reconciliation of changes in intangible assets and goodwill
As of
US$ MILLIONSJune 30, 2021December 31, 2020
Cost$3,677 $3,527 
Accumulated amortization(680)(579)
Total$2,997 $2,948 
The following table presents the change in the cost balance of intangible assets:
US$ MILLIONSFor the six-month period ended June 30, 2021For the 12 month period ended December 31, 2020
Cost at beginning of the period$3,527 $4,479 
Additions, net of disposals14 35 
Foreign currency translation136 (987)
Ending Balance$3,677 $3,527 
The following table presents the accumulated amortization for our company’s intangible assets:
US$ MILLIONSFor the six-month period ended June 30, 2021For the 12 month period ended December 31, 2020
Accumulated amortization at beginning of the period$(579)$(543)
Amortization(74)(152)
Foreign currency translation(27)116 
Ending Balance$(680)$(579)
Disclosure of detailed information about intangible assets
Intangible assets are allocated to the following cash generating units:
As of
US$ MILLIONSJune 30, 2021December 31, 2020
Brazilian regulated gas transmission operation$2,949 $2,903 
U.K. regulated distribution operation48 45 
Total$2,997 $2,948