Line of Credit facility, Weighted Average Term

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Management Agreement Termination Fee

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Proceeds from Issuance of Debt and Equity

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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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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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

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Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.

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For receivables acquired in a business combination, excluding certain loans and debt securities acquired in a transfer (as defined), this element represents the gross contractual amounts receivable, by major class of receivable, such as loans, direct finance leases (as defined), and any other class of receivables.

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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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Percentage of voting equity interests acquired in a business combination achieved in stages, including equity interests in the acquiree held by the acquirer immediately before the acquisition date and acquired at the acquisition date.

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No definition available.

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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 amount of debt that an Entity assumes in acquiring a business or in consideration for an asset received in a noncash (or part noncash) acquisition. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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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 outflow associated with the acquisition of or advances to an entity that is related to it but not strictly controlled (for example, an unconsolidated subsidiary, affiliate, and joint venture or equity method investment) or the acquisition of an additional interest in a subsidiary (controlled entity).

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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 from the repayments of a long-term debt originally issued by another party but is assumed by the entity.

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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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The cash outflow to repay long-term debt that is wholly or partially secured by collateral. Excludes repayments of tax exempt secured debt.

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Number of new stock issued during the period.

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Percentage of subsidiary's or equity method investee's stock owned by parent immediately after all stock transactions.

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ACQUISTIONS, DIVESTITURES AND DISCONTINUED OPERATIONS - Sempra Texas Utility (Details) - USD ($) $ / shares in Units, $ in Millions					1 Months Ended		3 Months Ended				12 Months Ended
	May 17, 2019	May 16, 2019	Mar. 09, 2018	Mar. 08, 2018	Feb. 29, 2020	Jan. 31, 2018	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Repayments of debt						$ 800.0
Issuances of common stock, net											$ 1,830.0	$ 2,272.0	$ 47.0
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						$ 7,000.0
Sempra Texas Holdings Corp [Member] \| Oncor Electric Delivery Company LLC [Member]
Business Acquisition [Line Items]
Acquired percentage interest			80.03%
Oncor Electric Delivery Holdings Company LLC [Member]
Business Acquisition [Line Items]
Total purchase price paid			$ 9,568.0
Sharyland Holdings, LP [Member]
Business Acquisition [Line Items]
Acquired percentage interest		50.00%
Total purchase price paid		$ 95.0
Post closing adjustments		$ 7.0
Sempra Texas Intermediate Holding Company LLC [Member] \| Sempra Texas Holdings Corp [Member] \| Oncor Electric Delivery Holdings 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 Electric Delivery Company LLC [Member]
Business Acquisition [Line Items]
Ownership percentage in consolidated entity			0.22%
Acquired percentage interest			0.22%
Cash consideration (fair value of total consideration)			$ 26.0
Total purchase price paid			26.0
Oncor Electric Delivery Holdings Company LLC [Member] \| Sempra Texas Holdings Corp [Member]
Business Acquisition [Line Items]
Cash consideration (fair value of total consideration)			9,450.0
Additional consideration transferred			31.0
Transaction costs incurred			$ 59.0
Oncor Electric Delivery Holdings Company LLC [Member] \| InfraREIT Acquisition [Member]
Business Acquisition [Line Items]
Acquired percentage interest		100.00%
Total purchase price paid		$ 1,275.0
Share price (USD per share)		$ 21
Management agreement termination fee		$ 40.0
Debt assumed	$ 953.0
Repayments of assumed debt	602.0
Repayments of secured debt	$ 351.0
Oncor Electric Delivery Holdings Company LLC [Member] \| InfraREIT Partners [Member]
Business Acquisition [Line Items]
Acquired percentage interest		100.00%
Sharyland Holdings, LP [Member] \| Sharyland Holdings, LP [Member] \| Sharyland Utilities [Member]
Business Acquisition [Line Items]
Acquired percentage interest		100.00%
Settlement of Forward Sale Contracts [Member] \| Common Stock [Member]
Business Acquisition [Line Items]
Issuances of common stock, net				$ 900.0			$ 1,066.0	$ 728.0	$ 800.0	$ 900.0
Payments of stock issuance costs				$ 16.0			$ 18.0	$ 13.0	$ 14.0	$ 16.0
Shares issued (in shares)				8,556,630			9,750,000	7,156,185	7,651,671	8,556,630
Commercial paper [Member] \| Oncor Electric Delivery Holdings Company LLC [Member] \| Sempra Texas Holdings Corp [Member]
Business Acquisition [Line Items]
Proceeds from issuance of debt				$ 2,600.0
Weighted average term, of line of credit				47 days
Weighted average rate				2.20%
Oncor Electric Delivery Holdings Company LLC [Member]
Business Acquisition [Line Items]
Capital contributions to investees		$ 1,330.0
Subsequent Event [Member] \| TTI [Member]
Business Acquisition [Line Items]
Ownership percentage in consolidated entity					100.00%
Subsequent Event [Member] \| Oncor Electric Delivery Company LLC [Member]
Business Acquisition [Line Items]
Ownership percentage in consolidated entity					19.75%
Ownership percentage held by noncontrolling owners					80.45%
Subsequent Event [Member] \| Sempra Texas Intermediate Holding Company LLC [Member] \| TTHC [Member]
Business Acquisition [Line Items]
Additional interest acquired (as a percent)					1.00%
Subsequent Event [Member] \| Sempra Texas Intermediate Holding Company LLC [Member] \| Oncor Electric Delivery Company LLC Additional Acquisition [Member] \| Oncor Electric Delivery Company LLC [Member]
Business Acquisition [Line Items]
Acquired percentage interest					0.20%
Cash consideration (fair value of total consideration)					$ 23.0
Notes receivable acquired					$ 5.5