REVENUES

12 Months Ended

Dec. 31, 2021

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