INTANGIBLE ASSETS | | | | | | | | | | | | | As of | | US$ MILLIONS | June 30, 2026 | | December 31, 2025 | | Cost | $ | 4,476 | | | $ | 4,207 | | | Accumulated amortization | (1,238) | | | (1,105) | | | Total | $ | 3,238 | | | $ | 3,102 | |
Intangible assets are allocated to the following cash generating units: | | | | | | | | | | | | | As of | | US$ MILLIONS | June 30, 2026 | | December 31, 2025 | | Brazilian regulated gas transmission operation | $ | 2,661 | | | $ | 2,509 | | | Global intermodal logistics operation | 560 | | | 570 | | | | | | | U.K. regulated distribution operation | 17 | | | 23 | | | Total | $ | 3,238 | | | $ | 3,102 | |
The following table presents the change in the cost balance of intangible assets: | | | | | | | | | | | | | US$ MILLIONS | For the six-month period ended June 30, 2026 | | For the 12-month period ended December 31, 2025 | | Cost at beginning of the period | $ | 4,207 | | | $ | 3,762 | | Acquisitions through business combinations(1) | — | | | 13 | | | Additions, net of disposals | 46 | | | 40 | | | Non-cash additions | 4 | | | — | | | | | | | Foreign currency translation | 219 | | | 392 | | | Ending Balance | $ | 4,476 | | | $ | 4,207 | |
1.Refer to Note 5, Acquisition of Businesses, for further details. The following table presents the accumulated amortization for our company’s intangible assets: | | | | | | | | | | | | | | US$ MILLIONS | For the six-month period ended June 30, 2026 | | For the 12-month period ended December 31, 2025 | | | Accumulated amortization at beginning of the period | $ | (1,105) | | | $ | (870) | | | | | | | | | Amortization | (73) | | | (132) | | | | | | | | | | | | | | Foreign currency translation | (60) | | | (103) | | | | Ending Balance | $ | (1,238) | | | $ | (1,105) | | |
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