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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables) | 12 Months Ended
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Dec. 31, 2020
Disclosure of analysis of other comprehensive income by item [abstract] |
Schedule of accumulated other comprehensive income (loss) |
US$ MILLIONS |  | Revaluation Surplus |  | Foreign Currency Translation |  | Cash Flow Hedges |  | Accumulated Other Comprehensive Income
Balance at December 31, 2018 |  | $ | 729 |  |  | $ | (449) |  |  | $ | (2) |  |  | $ | 278 |
Other comprehensive income |  | 230 |  |  | 12 |  |  | 3 |  |  | 245 |
Balance at December 31, 2019 |  | $ | 959 |  |  | $ | (437) |  |  | $ | 1 |  |  | $ | 523 |
Other comprehensive income |  | 118 |  |  | (105) |  |  | 3 |  |  | 16 |
Balance at December 31, 2020 |  | $ | 1,077 |  |  | $ | (542) |  |  | $ | 4 |  |  | $ | 539 |

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- Definition The entire disclosure of the analysis of other comprehensive income by item. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 106A -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_106A&doctype=Standard -URIDate 2020-01-01 + Details
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