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INTANGIBLE ASSETS (Tables) | 12 Months Ended
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Dec. 31, 2018
Intangible Assets [Abstract] |
Disclosure of detailed information about intangible assets | Intangible assets are allocated to the following cash generating units:
US$ MILLIONS |  | 2018 |  | 2017
Brazilian regulated gas transmission operation |  | $ | 4,211 |  |  | $ | 5,134 |
Australian regulated terminal |  | 1,766 |  |  | 1,957 |
North American residential energy infrastructure operation |  | 1,763 |  |  | — |
Peruvian toll roads |  | 1,118 |  |  | 1,144 |
Chilean toll roads |  | 928 |  |  | 1,100 |
Indian toll roads(1) |  | 843 |  |  | 130 |
U.K. port operation |  | 273 |  |  | 289 |
Other(2) |  | 733 |  |  | 140 |
Total |  | $ | 11,635 |  |  | $ | 9,894 |
Disclosure of reconciliation of changes in intangible assets and goodwill | The following table presents the change in the cost balance of intangible assets:
US$ MILLIONS |  | 2018 |  | 2017
Cost at beginning of the year |  | $ | 10,470 |  |  | $ | 4,732 |
Additions, net of disposals |  | 117 |  |  | 79 |
Acquisitions through business combinations(1) |  | 3,208 |  |  | 5,515 |
Non-cash additions |  | 7 |  |  | 18 |
Foreign currency translation |  | (1,287 | ) |  | 126 |
Cost at end of year |  | $ | 12,515 |  |  | $ | 10,470 |
(1) | See Note 6, Acquisition of Businesses for additional information.
The following table presents the accumulated amortization for Brookfield Infrastructure’s intangible assets:
US$ MILLIONS |  | 2018 |  | 2017
Accumulated amortization at beginning of year |  | $ | (576 | ) |  | $ | (267 | )
Amortization |  | (371 | ) |  | (289 | )
Foreign currency translation |  | 67 |  |  | (20 | )
Accumulated amortization at end of year |  | $ | (880 | ) |  | $ | (576 | )
US$ MILLIONS |  | 2018 |  | 2017
Cost |  | $ | 12,515 |  |  | $ | 10,470 |
Accumulated amortization |  | (880 | ) |  | (576 | )
Net intangible assets |  | $ | 11,635 |  |  | $ | 9,894 |

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