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ACQUISTION AND DIVESTITURE ACTIVITY - PRO FORMA INFORMATION (Details) - Compania Transmisora del Norte Grande S.A. [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Revenues	$ 11,703	$ 11,224
Net income	1,130	356
Earnings	$ 928	$ 261

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- Definition

The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

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-Publisher FASB
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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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