Consolidated cash flow statements (Parenthetical) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Consolidated cash flows statements [Abstract]
Proceeds from investments in contracted concessional assets	$ 20.5	$ 7.4	$ 22.2

The cash inflow from sales of property, plant and equipment, classified as investing activities. [Refer: Property, plant and equipment]

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 7
-IssueDate 2021-01-01
-Paragraph 16
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2021-en-r&anchor=para_16_b&doctype=Standard
-URIDate 2021-03-24

Name:	ifrs-full_ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration