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Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition.

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Percentage of voting equity interests acquired at the acquisition date in the business combination.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of tangible or intangible assets, including a business or subsidiary of the acquirer transferred by the entity to the former owners of the acquiree. Excludes cash.

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Weighted average interest rate of debt outstanding.

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The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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The cash outflow for cost incurred directly with the issuance of an equity security.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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The cash inflow from the additional capital contribution to the entity.

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The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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ACQUISTION AND DIVESTITURE ACTIVITY - Sempra Texas Utility (Details) - USD ($) $ in Millions						1 Months Ended	3 Months Ended		12 Months Ended
	Jul. 13, 2018	Mar. 09, 2018	Mar. 08, 2018	Jan. 12, 2018	Jan. 09, 2018	Jan. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Repayments of debt				$ 800		$ 800
Issuances of common stock, net of $41 in offering costs in 2018									$ 2,272	$ 47	$ 51
Oncor Holdings Electric Delivery Company LLC [Member]
Business Acquisition [Line Items]
Acquired percentage interest		80.25%
Oncor Electric Delivery Company LLC [Member]
Business Acquisition [Line Items]
Acquired percentage interest		80.25%
Sempra Texas Holdings Corp [Member]
Business Acquisition [Line Items]
Proceeds from issuance of debt and equity						$ 7,000
Sempra Texas Holdings Corp [Member] \| Oncor Electric Delivery Company LLC [Member]
Business Acquisition [Line Items]
Acquired percentage interest		80.03%
Oncor Electric Delivery Company LLC [Member] \| Oncor Electric Delivery Company LLC Additional Acquisition [Member] \| Oncor Holdings Electric Delivery Company LLC [Member]
Business Acquisition [Line Items]
Ownership percentage in consolidated entity		0.22%
Acquired percentage interest		0.22%
Consideration transferred		$ 26
Sempra Texas Intermediate Holding Company LLC [Member] \| Sempra Texas Holdings Corp [Member] \| Oncor Holdings Electric Delivery Company LLC [Member]
Business Acquisition [Line Items]
Ownership percentage in consolidated entity		100.00%
Sempra Texas Intermediate Holding Company LLC [Member] \| Oncor Electric Delivery Company LLC Additional Acquisition [Member] \| Oncor Holdings Electric Delivery Company LLC [Member]
Business Acquisition [Line Items]
Cash consideration (fair value of total consideration)		$ 26
Texas Transmission Investment LLC [Member] \| Sempra Texas Holdings Corp [Member] \| Oncor Electric Delivery Company LLC [Member]
Business Acquisition [Line Items]
Ownership percentage held by noncontrolling owners		19.75%
Oncor Holdings Electric Delivery Company LLC [Member] \| Sempra Texas Holdings Corp [Member]
Business Acquisition [Line Items]
Cash consideration (fair value of total consideration)		$ 9,450
Additional consideration transfered		31
Transaction costs incurred		$ 59
Common Stock [Member]
Business Acquisition [Line Items]
Shares issued (in shares)	11,212,500		8,556,630		26,869,158		7,651,671	8,556,630
Settlement of Forward Sale Contracts [Member] \| Common Stock [Member]
Business Acquisition [Line Items]
Issuances of common stock, net of $41 in offering costs in 2018			$ 900				$ 800	$ 900
Payments of stock issuance costs			16
Commercial paper [Member] \| Oncor Holdings Electric Delivery Company LLC [Member] \| Sempra Texas Holdings Corp [Member]
Business Acquisition [Line Items]
Proceeds from issuance of debt			$ 2,600
Weighted average term, of line of credit			47 days
Weighted average rate			2.20%