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PROPERTY, PLANT AND EQUIPMENT
 12 Months Ended
Dec. 31, 2024
Property, plant and equipment [abstract]  
PROPERTY, PLANT AND EQUIPMENT PROPERTY, PLANT AND EQUIPMENT
US$ MILLIONSUtilitiesTransportMidstreamDataTotal
Gross Carrying Amount:    
Balance as at December 31, 2022$7,277 $9,337 $14,679 $8,185 $39,478 
Additions, net of disposals519 591 459 226 1,795 
Assets held by subsidiaries disposed during the period— (59)(45)— (104)
Non-cash additions (disposals)28 74 (7)692 787 
Acquisitions through business combinations(1)
118 8,811 — 35 8,964 
Net foreign currency exchange differences321 126 319 (52)714 
Balance at December 31, 2023$8,263 $18,880 $15,405 $9,086 $51,634 
Additions, net of disposals480 1,229 626 1,121 3,456 
Acquisitions through business combinations(1)
— — — 4,141 4,141 
Assets held by subsidiaries disposed during the period— (141)— (141)
Non-cash additions (disposals)92 (221)(146)(303)(578)
Assets reclassified as held for sale— (1,867)— — (1,867)
Net foreign currency exchange differences(268)(306)(1,141)(230)(1,945)
Balance at December 31, 2024$8,567 $17,574 $14,744 $13,815 $54,700 
Accumulated depreciation:    
Balance as at December 31, 2022$(1,454)$(2,040)$(982)$(920)$(5,396)
Depreciation expense(392)(601)(557)(419)(1,969)
Disposals53 20 — — 73 
Assets held by subsidiaries disposed during the period— 17 — — 17 
Non-cash disposals19 45 30 90 184 
Net foreign currency exchange differences(60)(45)(29)2 (132)
Balance at December 31, 2023$(1,834)$(2,604)$(1,538)$(1,247)$(7,223)
Depreciation expense(413)(1,003)(629)(775)(2,820)
Disposals74 26 — 15 115 
Assets reclassified as held for sale— 92 — — 92 
Assets held by subsidiaries disposed during the period— 38 — — 38 
Non-cash disposals35 39 101 12 187 
Net foreign currency exchange differences70 128 120 33 351 
Balance at December 31, 2024$(2,068)$(3,284)$(1,946)$(1,962)$(9,260)
US$ MILLIONSUtilitiesTransportMidstreamDataTotal
Accumulated fair value adjustments:    
Balance as at December 31, 2022$1,639 $1,048 $522 $— $3,209 
Fair value adjustments143 330 312 — 785 
Net foreign currency exchange differences125 17 (1)— 141 
Balance at December 31, 2023$1,907 $1,395 $833 $— $4,135 
Fair value adjustments119 92 1,204 12 1,427 
Net foreign currency exchange differences(57)(93)(4)— (154)
Assets held by subsidiaries disposed during the period— (1)— — (1)
Balance at December 31, 2024$1,969 $1,393 $2,033 $12 $5,407 
Net book value:    
December 31, 2024(2)
$8,468 $15,683 $14,831 $11,865 $50,847 
December 31, 2023$8,336 $17,671 $14,700 $7,839 $48,546 

(1)See Note 7, Acquisition of Businesses, for additional information.
(2)Includes right-of-use assets of $288 million (2023: $237 million) in our utilities segment, $933 million (2023: $1,044 million) in our transport segment, $303 million (2023: $329 million) in our midstream segment and $3,658 million (2023: $1,938 million) in our data segment.
The partnership’s property, plant, and equipment is measured at fair value on a recurring basis with an effective date of revaluation for all asset classes of December 31, 2024 and 2023. Brookfield Infrastructure determined fair value under the income method or on a depreciated replacement cost basis. Assets under development were revalued where fair value could be reliably measured.
The following table summarizes the valuation techniques and significant inputs for the valuation of property, plant and equipment using the income method, categorized by segment.
  Dec. 31, 2024 Dec. 31, 2023
Segment 
Valuation Technique(1)
 Discount Rate Terminal Value Multiple Investment Horizon 
Valuation Technique(1)
 Discount Rate Terminal Value Multiple Investment Horizon
Utilities Discounted cash flow model 
8% to 15%
 
16x
 
10 to 20 yrs
 Discounted cash flow model 
8% to 11%
 
15x
 
10 to 20 yrs
Transport Discounted cash flow model 
10%
 
9x to 20x
 
10 yrs
 Discounted cash flow model 
9%
 
8x to 20x
 
10 yrs
Midstream Discounted cash flow model 
15%
 
8x to 10x
 
1 to 2 yrs
 Discounted cash flow model 
15%
 
10x
 
6 yrs
(1)Certain businesses are valued using the replacement cost method as a result of their underlying operations. Replacement costs are determined with guidance from independent studies and third party evaluators.
An increase in the discount rate would lead to a decrease in the fair value of property, plant and equipment. Conversely, an increase to the terminal value multiple would increase the fair value of property, plant and equipment. Our partnership has classified all property, plant and equipment under level 3 of the fair value hierarchy.
At December 31, 2024, Brookfield Infrastructure carried out an assessment of the fair value of its utilities property, plant and equipment, resulting in a gain from revaluation of $119 million (2023: $143 million) which was recognized in revaluation surplus in the Consolidated Statements of Comprehensive Income. The key driver behind the revaluation gain recorded was growth in underlying cash flows at our U.K. regulated distribution business, as a result of additional connections and inflationary increases in rates.
At December 31, 2024, Brookfield Infrastructure carried out an assessment of the fair value of its transport property, plant and equipment. A gain from revaluation of $92 million (2023: $330 million) was recognized in revaluation surplus in the Consolidated Statements of Comprehensive Income. Stronger volumes and higher tariffs were the main contributors to the gain.
At December 31, 2024, Brookfield Infrastructure carried out an assessment of the fair value of its midstream property, plant and equipment. A gain from revaluation of $1,204 million (2023: $312 million) was recognized in revaluation surplus in the Consolidated Statements of Comprehensive Income. Underlying valuation assumptions in the midstream segment remain relatively consistent with the prior year with the current year’s gain attributable to favorable market conditions and organic growth.
At December 31, 2024, Brookfield Infrastructure carried out an assessment of the fair value of its data property, plant and equipment, which are measured using replacement cost approach. A gain from revaluation of $12 million (2023: $nil) was recognized in revaluation surplus in the Consolidated Statements of Comprehensive Income .
The following table summarizes the carrying amount of property, plant and equipment that would have been recognized had assets been carried under the cost model, inclusive of purchase price allocations.
US$ MILLIONSDec. 31, 2024Dec. 31, 2023
Utilities$6,803 $6,706 
Transport14,633 16,596 
Midstream13,013 13,993 
Data11,856 7,840