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INTANGIBLE ASSETS (Tables)
 12 Months Ended
Dec. 31, 2021
Intangible assets other than goodwill [abstract]  
Disclosure of reconciliation of changes in intangible assets
(US$ MILLIONS)Water and sewage concession agreementsCustomer relationships
Computer software, patents, trademarks and proprietary technology (3)
Loyalty program
Brand names (3)
OtherValue of insurance contracts acquiredTotal assets
Gross carrying amount: 
Balance at January 1, 2020$1,968 $5,760 $3,511 $158 $409 $471 $227 $12,504 
Additions496 — 107 — — 7 — 610 
Acquisitions through business combinations (1)
— 55 90 — 10 16 — 171 
Dispositions— (68)(5)— — (100)— (173)
Assets reclassified as held for sale (2)
— — (1)— — — — (1)
Foreign currency translation(429)95 86 11 32 (37)5 (237)
Balance at December 31, 2020$2,035 $5,842 $3,788 $169 $451 $357 $232 $12,874 
Additions165 — 104 — 3 50 — 322 
Acquisitions through business combinations (1)
— 3,028 899 — 605 4 — 4,536 
Dispositions— (64)(66)— (23)(2)— (155)
Foreign currency translation(146)(187)(116)(7)23 (18)2 (449)
Balance at December 31, 2021$2,054 $8,619 $4,609 $162 $1,059 $391 $234 $17,128 
Accumulated amortization and impairment
Balance at January 1, 2020$(171)$(414)$(282)$(26)$(12)$(39)$(1)$(945)
Amortization expense(59)(361)(263)(2)(8)(20)(39)(752)
Dispositions— 68 4 — — 18 — 90 
Foreign currency translation49 (41)(7)(4)(8)7 (2)(6)
Balances at December 31, 2020$(181)$(748)$(548)$(32)$(28)$(34)$(42)$(1,613)
Amortization expense(71)(420)(257)(11)(14)(20)(48)(841)
Dispositions— 25 36 — 12 — — 73 
Foreign currency translation15 50 19 (6)(21)2 — 59 
Balance at December 31, 2021$(237)$(1,093)$(750)$(49)$(51)$(52)$(90)$(2,322)
Net book value
December 31, 2020$1,854 $5,094 $3,240 $137 $423 $323 $190 $11,261 
December 31, 2021$1,817 $7,526 $3,859 $113 $1,008 $339 $144 $14,806 
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(1)See Note 3 for additional information.
(2)Includes assets that were reclassified as held for sale and subsequently disposed. See Note 8 and Note 9 for additional information.
(3)Includes indefinite life intangible assets with a carrying value of $1,470 million (2020: $900 million) in the partnership’s infrastructure services and industrials segments.
(US$ MILLIONS)20212020
Balance at beginning of year$5,244 $5,218 
Acquisitions through business combinations (1)
3,967 (83)
Impairment losses (175)— 
Dispositions(171)(215)
Foreign currency translation(280)324 
Balance at end of year$8,585 $5,244 
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(1)See Note 3 for additional information on significant acquisitions.