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GOODWILL
 12 Months Ended
Dec. 31, 2023
Intangible Assets [Abstract]  
GOODWILL GOODWILL
The following table presents the carrying amount for Brookfield Infrastructure’s goodwill:
US$ MILLIONS20232022
Balance at beginning of the year$8,789 $8,979 
Acquisitions through business combinations(1)
5,334 278 
Assets held by subsidiaries disposed during the period(2)
(36)(108)
Held for sale— (21)
Foreign currency translation and other401 (339)
Balance at end of the year$14,488 $8,789 
(1)See Note 6, Acquisition of Businesses, for additional information.
(2)See Note 5, Disposition of Businesses, for additional information.
Goodwill is evaluated for impairment annually or more often if events or circumstances indicate there may be impairment. Impairment is determined by assessing if the carrying value of cash generating units or a group of cash generating units, including the allocated goodwill, exceeds its recoverable amount determined as the greater of the estimated fair value less costs of disposal or the value in use. During 2023, the recoverable amount exceeded the carrying amount of each cash generating unit.
Goodwill is allocated to the following cash generating units or group of cash generating units:
US$ MILLIONS20232022
North American residential decarbonization infrastructure business$3,117 $1,463 
North American rail operations2,098 2,094 
Canadian diversified midstream operation2,028 1,984 
European residential decarbonization infrastructure business1,881 — 
Global intermodal logistics operation
1,163 — 
Canadian natural gas gathering and processing operation726 710 
Brazilian regulated transmission operation526 488 
European hyperscale data center platform797 — 
U.S. colocation data center operation503 503 
Colombian natural gas distribution operation461 367 
U.K. wireless infrastructure operation350 332 
Other838 848 
Total$14,488 $8,789 
The recoverable amount of goodwill has been determined using a discounted cash flow model whereby the fair value measurement is classified under level 3 on the fair value hierarchy. For businesses with the most significant goodwill as separately listed in the table above, the key inputs in determining the fair value of each cash generating unit under the discounted cash flow model are the utilization of different types of discount rates ranging from 8.5% to 17.0%, terminal value multiples of 9x to 30x and discrete cash flow periods from 4 to 18 years.