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The amount of payables due to the investment from Liberty, down payments from clients and other liabilities which fair value is similar to the nominal value and the effect of discounting them is not significant.

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The fair value, at acquisition date, of the consideration transferred in a business combination. [Refer: Business combinations [member]]

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The amount of assets that the entity (a) expects to realise or intends to sell or consume in its normal operating cycle; (b) holds primarily for the purpose of trading; (c) expects to realise within twelve months after the reporting period; or (d) classifies as cash or cash equivalents (as defined in IAS 7) unless the asset is restricted from being exchanged or used to settle a liability for at least twelve months after the reporting period. [Refer: Assets]

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The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Financial instruments, class [member]; Financial liabilities]

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The amount of investments accounted for using the equity method. The equity method is a method of accounting whereby the investment is initially recognised at cost and adjusted thereafter for the post-acquisition change in the investor's share of net assets of the investee. The investor's profit or loss includes its share of the profit or loss of the investee. The investor's other comprehensive income includes its share of the other comprehensive income of the investee. [Refer: At cost [member]]

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The percentage of voting equity interests acquired in a business combination. [Refer: Business combinations [member]]

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The profit (loss) of the acquiree, since the acquisition date, included in the consolidated statement of comprehensive income. [Refer: Profit (loss)]

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Changes in the scope of the consolidated financial statements (Details) $ in Thousands			12 Months Ended
	Dec. 28, 2018 USD ($) TransmissionLine	Oct. 10, 2018 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 13, 2018 USD ($)	Dec. 11, 2018 USD ($)	Feb. 28, 2018 USD ($)	Feb. 28, 2017	Dec. 31, 2016 USD ($)
Changes in the scope of the consolidated financial statements [Abstract]
Percentage interest acquired								12.50%
Business acquisition [Abstract]
Concessional assets (Note 6)			$ 1,161,441	$ 1,169,216
Investments carried under the equity method (Note 7)			53,419	55,784					$ 55,009
Current assets			1,127,695	1,141,907
Project debt long term (Note 15)			(4,826,659)	(5,228,917)
Deferred tax liabilities (Note 18)			(211,000)	(186,583)					$ (95,037)
Project debt short term (Note 15)			(264,455)	(246,291)
Change in the scope of the consolidated financial statements				$ 0
Asset Acquisition [Member]
Changes in the scope of the consolidated financial statements [Abstract]
Purchase price			76,604
Business acquisition [Abstract]
Concessional assets (Note 6)			155,909
Investments carried under the equity method (Note 7)			1
Current assets			5,646
Project debt long term (Note 15)			(79,016)
Deferred tax liabilities (Note 18)			(590)
Project debt short term (Note 15)			(2,346)
Other current and non-current liabilities			(3,000)
Asset acquisition - purchase price			(76,604)
Net result of the asset acquisition			0
Revenue contributed by the acquisitions			1,800
Amount of loss after tax			(300)
Additional revenue amount			13,300
Additional amount of loss after tax			$ (700)
Mini- Hydro [Member]
Changes in the scope of the consolidated financial statements [Abstract]
Percentage interest acquired							100.00%
Purchase price							$ 9,327
Business acquisition [Abstract]
Asset acquisition - purchase price							$ (9,327)
Pemex Transportation System [Member]
Changes in the scope of the consolidated financial statements [Abstract]
Percentage interest acquired		5.00%
Consideration initial amount will be disbursed as construction progresses		$ 7,000
Additional ownership percentage to be acquired		65.00%
Remaining ownership percentage to be acquired one year after COD		30.00%
Total estimated equity investment		$ 150,000
Chile TL3 [Member]
Changes in the scope of the consolidated financial statements [Abstract]
Purchase price						$ 6,000
Business acquisition [Abstract]
Asset acquisition - purchase price						$ (6,000)
Melowind [Member]
Changes in the scope of the consolidated financial statements [Abstract]
Percentage interest acquired					100.00%
Purchase price					$ 45,276
Business acquisition [Abstract]
Asset acquisition - purchase price					$ (45,276)
Power Substation [Member]
Changes in the scope of the consolidated financial statements [Abstract]
Purchase price	$ 16,000
Number of transmission lines acquired \| TransmissionLine	2
Business acquisition [Abstract]
Asset acquisition - purchase price	$ (16,000)