SEMPRA - EQUITY AND EARNINGS PER COMMON SHARE - FORWARD SALE AGREEMENTS (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
Mar. 31, 2025	Dec. 31, 2024
At The Market Program Offering
Equity, Class of Treasury Stock [Line Items]
Number of shares issued since inception	4,996,591
Average price per share since inception (usd per share)	$ 83.175
Q4 2024 Forward Sale Agreement
Equity, Class of Treasury Stock [Line Items]
Number of shares subject to agreement		2,909,274
Sale of stock, price per share (usd per share)		$ 92.1546
Expected net proceeds		$ 268.0
Sales commissions		$ 2.4
Number of shares that remain to be settled	2,909,274
Q1 2025 Forward Sale Agreement
Equity, Class of Treasury Stock [Line Items]
Number of shares subject to agreement	2,087,317
Sale of stock, price per share (usd per share)	$ 70.6593
Expected net proceeds	$ 147.0
Sales commissions	$ 1.3
Number of shares that remain to be settled	2,087,317

Sale of Stock, Average Price Per Share Since Inception

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- Definition

Sale of Stock, Consideration Expected To Be Received on Transaction

+ References

No definition available.

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- Definition

Sale of Stock, Number of Shares Issued Since Inception

+ References

No definition available.

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- Definition

Sale of Stock, Number of Shares That Remain To Be Issued in Transaction

+ References

No definition available.

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- Definition

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.

+ References

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-15

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- Definition

The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

+ References

No definition available.

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- Definition

Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

+ References

No definition available.

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