INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2021

Intangible Assets [Abstract]

Disclosure of reconciliation of changes in intangible assets

(US$ MILLIONS)	Water and sewage concession agreements		Customer relationships		Computer software, patents, trademarks and proprietary technology		Brand names (1)		Other		Total assets
Gross carrying amount:
Balance at January 1, 2020	$	1,968	$	436	$	1,920	$	297	$	392	$	5,013
Additions	496		—		14		—		36		546
Acquisitions through business combinations	—		7		—		—		7		14
Dispositions	—		(67)		(5)		—		(101)		(173)
Foreign currency translation	(429)		5		20		—		(6)		(410)
Balances at December 31, 2020	$	2,035	$	381	$	1,949	$	297	$	328	$	4,990
Additions	165		1		77		—		47		290
Dispositions	—		—		(1)		—		(1)		(2)
Foreign currency translation	(145)		(8)		(21)		—		(17)		(191)
Balance at December 31, 2021	$	2,055	$	374	$	2,004	$	297	$	357	$	5,087
Accumulated amortization and impairment
Balance at January 1, 2020	$	(159)	$	(132)	$	(193)	$	—	$	(19)	$	(503)
Amortization expense	(59)		(30)		(136)		—		(24)		(249)
Dispositions	—		67		3		—		16		86
Foreign currency translation	37		7		(4)		—		1		41
Balances at December 31, 2020	$	(181)	$	(88)	$	(330)	$	—	$	(26)	$	(625)
Amortization expense	(71)		(30)		(143)		—		(18)		(262)
Dispositions	—		—		2		—		—		2
Foreign currency translation	14		3		5		—		2		24
Balance at December 31, 2021	$	(238)	$	(115)	$	(466)	$	—	$	(42)	$	(861)
Net book value
December 31, 2020	$	1,854	$	293	$	1,619	$	297	$	302	$	4,365
December 31, 2021	$	1,817	$	259	$	1,538	$	297	$	315	$	4,226

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(1)Includes indefinite life intangible assets with a carrying value of $297 million (2020: $297 million).

(US$ MILLIONS)	2021		2020
Balance at beginning of year	$	2,331	$	2,346
Acquisitions through business combinations	6		9
Dispositions	—		(215)
Foreign currency translation	(121)		191
Balance at end of year	$	2,216	$	2,331