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GOODWILL (Tables)
 12 Months Ended
Dec. 31, 2023
Intangible Assets [Abstract]  
Disclosure of reconciliation of changes in intangible assets and goodwill
As of
US$ MILLIONSDec. 31, 2023Dec. 31, 2022
Cost$4,657 $3,629 
Accumulated amortization(958)(782)
Total$3,699 $2,847 
The following table presents the change in the cost balance of intangible assets:
For the year ended
US$ MILLIONSDec. 31, 2023Dec. 31, 2022
Cost at beginning of the year$3,629 $3,332 
Acquisitions through business combinations(1)
710 — 
Additions, net of disposals36 81 
Foreign currency translation282 216 
Cost at end of year$4,657 $3,629 
(1)See Note 4, Acquisition of Businesses, for additional information.

The following table presents the accumulated amortization for our company’s intangible assets:
For the year ended
US$ MILLIONSDec. 31, 2023Dec. 31, 2022
Accumulated amortization at beginning of year$(782)$(645)
Amortization(113)(101)
Foreign currency translation(63)(36)
Accumulated amortization at end of year$(958)$(782)
The following table presents the carrying amount for our company’s goodwill:
As of
US$ MILLIONSDec. 31, 2023Dec. 31, 2022
Balance at beginning of the year$518 $489 
Acquisitions through business combinations(1)
1,163 — 
Foreign currency translation and other45 29 
Balance at end of the year$1,726 $518 
(1)See Note 4, Acquisition of Businesses, for additional information.
Disclosure of detailed information about intangible assets
Intangible assets are allocated to the following cash generating units:
As of
US$ MILLIONSDec. 31, 2023Dec. 31, 2022
Brazilian regulated gas transmission operation$2,970 $2,816 
Global intermodal logistics operation(1)
704 — 
U.K. regulated distribution operation25 31 
Total$3,699 $2,847 
(1)See Note 4, Acquisition of Businesses, for additional information.
Goodwill is allocated to the following cash generating units or group of cash generating units:
As of
US$ MILLIONSDec. 31, 2023Dec. 31, 2022
Global intermodal logistics operation(1)
$1,163 $— 
Brazilian regulated gas transmission operation
526 488 
U.K. regulated distribution operation
37 30 
Total$1,726 $518 
(1)See Note 4, Acquisition of Businesses, for additional information.