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ACQUISTION AND DIVESTITURE ACTIVITY - Sempra Energy (Details) - USD ($) $ / shares in Units, $ in Millions | Oct. 18, 2018 | Dec. 18, 2018
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Sharyland Holdings, LP [Member] |  |
Business Acquisition [Line Items] |  |
Commitment to invest | $ 1,025 |
Sempra Texas Utility [Member] | InfraREIT Acquisition [Member] |  |
Business Acquisition [Line Items] |  |
Consideration transferred | $ 1,275 |
Share price (USD per share) | $ 21 |
Management agreement termination fee | $ 40 |
Debt assumed | $ 945 |
Sempra Texas Utility [Member] | Sharyland Holdings, LP [Member] |  |
Business Acquisition [Line Items] |  |
Acquired percentage interest | 50.00% |
Consideration transferred | $ 98 |
Sempra Texas Utility [Member] | InfraREIT [Member] | InfraREIT Acquisition [Member] |  |
Business Acquisition [Line Items] |  |
Acquired percentage interest | 100.00% |
Sempra Texas Utility [Member] | InfraREIT Partners [Member] | InfraREIT Acquisition [Member] |  |
Business Acquisition [Line Items] |  |
Acquired percentage interest | 100.00% |
Sempra Texas Utility [Member] | Sharyland Utilities [Member] | Sharyland Holdings, LP [Member] |  |
Business Acquisition [Line Items] |  |
Acquired percentage interest | 100.00% |
Ownership percentage in consolidated entity | 50.00% |
Disposal Group Held-for-sale [Member] | Solar Assets and One Wind Generation Facility [Member] | Sempra Renewables [Member] |  |
Business Acquisition [Line Items] |  |
Proceeds from sale |  | $ 1,600

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