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EMPLOYEE BENEFIT PLANS - PROFIT SHARING PLANS (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Chilquinta Energia Profit Sharing [Member] |  |  |
Profit Sharing Plans [Line Items] |  |  |
Recorded Annual Profit Sharing Expense | $ 7 | $ 7 | $ 5
Luz del Sur Profit Sharing [Member] |  |  |
Profit Sharing Plans [Line Items] |  |  |
Recorded Annual Profit Sharing Expense | $ 13 | $ 12 | $ 10

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- Definition Recorded annual profit sharing expense. + References No definition available. + Details
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- Details
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