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SEMPRA - EQUITY AND EARNINGS PER COMMON SHARE - FORWARD SALE AGREEMENTS (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended
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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 |

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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 + Details
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