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REVENUES | 12 Months Ended
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Dec. 31, 2021
Revenue [abstract] |
REVENUES | REVENUES a)Revenues by service line Substantially all of these revenues are recognized over time as services are rendered. The following table disaggregates revenues by service line:
|  | For the year ended December 31,
US$ MILLIONS |  | 2021 |  | 2020 |  | 2019
Gas Transmission |  | $ | 1,074 |  |  | $ | 942 |  |  | $ | 1,141 |
Distribution |  | 374 |  |  | 346 |  |  | 307 |
Connections |  | 167 |  |  | 118 |  |  | 152 |
Other |  | 28 |  |  | 24 |  |  | 19 |
Total |  | $ | 1,643 |  |  | $ | 1,430 |  |  | $ | 1,619 |
During the year ended December 31, 2021, revenues benefited from inflationary tariff increases and capital commissioned into rate base. These benefits were partially offset by the depreciation of the Brazilian real. b)Revenues from external customers The following table disaggregates revenues by geographical region.
|  | For the year ended December 31,
US$ MILLIONS |  | 2021 |  | 2020 |  | 2019
Brazil |  | $ | 1,074 |  |  | $ | 942 |  |  | $ | 1,141 |
United Kingdom |  | 569 |  |  | 488 |  |  | 478 |
|  | $ | 1,643 |  |  | $ | 1,430 |  |  | $ | 1,619 |
Our company’s customer base is comprised predominantly of investment grade companies, with only one customer that makes up greater than 10% of our company’s consolidated revenues. For the year ended December 31, 2021, revenue generated from this customer was $1,074 million (2020: $942 million, 2019: $1,141 million). Our company has completed a review of the credit risk of key counterparties. Based on their liquidity position, business performance, and aging of our accounts receivable, we do not have any significant changes in expected credit losses at this time. Our company continues to monitor the credit risk of our counterparties in light of the economic impact of COVID-19 but has experienced no issues to date. c)Non-Current Assets
|  | As of
US$ MILLIONS |  | Dec. 31, 2021 |  | Dec. 31, 2020
Brazil |  | $ | 3,115 |  |  | $ | 3,494 |
United Kingdom |  | 4,961 |  |  | 5,264 |
|  | $ | 8,076 |  |  | $ | 8,758 |

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- Definition The disclosure of the disaggregation of revenue from contracts with customers. [Refer: Revenue from contracts with customers] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2021-01-01 -Paragraph 114 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2021-en-r&anchor=para_114&doctype=Standard -URIDate 2021-03-24 + Details
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