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REVENUES | 12 Months Ended
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Dec. 31, 2020
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 |  | 2020 |  | 2019 |  | 2018
Gas Transmission |  | $ | 942 |  |  | $ | 1,141 |  |  | $ | 1,112 |
Distribution |  | 346 |  |  | 307 |  |  | 286 |
Connections |  | 118 |  |  | 152 |  |  | 139 |
Other |  | 24 |  |  | 19 |  |  | 24 |
Total |  | $ | 1,430 |  |  | $ | 1,619 |  |  | $ | 1,561 |
During the year ended December 31, 2020, revenues benefited from inflationary tariff increases and capital commissioned into rate base. These benefits were more than offset by the depreciation of the Brazilian real and lower connections revenue. b)Revenues from external customers The following table disaggregates revenues by geographical region.
|  | For the year ended December 31,
US$ MILLIONS |  | 2020 |  | 2019 |  | 2018
Brazil |  | $ | 942 |  |  | $ | 1,141 |  |  | $ | 1,112 |
United Kingdom |  | 488 |  |  | 478 |  |  | 449 |
|  | $ | 1,430 |  |  | $ | 1,619 |  |  | $ | 1,561 |
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, 2020, revenue generated from this customer was $942 million (2019: $1,141 million, 2018: $1,112 million). Our company has completed a review of the credit risk of key counterparties. Based on their liquidity position, business performance, and aging of our accounts receivable, we do not have any significant changes in expected credit losses at this time. Our company continues to monitor the credit risk of our counterparties in light of the economic impact of COVID-19 but has experienced no issues to date. c)Non-Current Assets
|  | As of
US$ MILLIONS |  | Dec. 31, 2020 |  | Dec. 31, 2019
Brazil |  | $ | 3,494 |  |  | $ | 4,606 |
United Kingdom |  | 5,264 |  |  | 4,653 |
|  | $ | 8,758 |  |  | $ | 9,259 |

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