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SEMPRA - EQUITY AND EARNINGS PER COMMON SHARE - COMMON STOCK NARRATIVE (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2025 | Dec. 31, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Mar. 28, 2025 | Nov. 30, 2024
SI Partners and ConocoPhillips | Port Arthur LNG |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |
Funding commitment, aggregate amount |  |  | $ 9,000.0 |  |  |
SI Partners | Port Arthur LNG |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |
Funding commitment paid |  |  | $ 2,700.0 |  |  |
SI Partners |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |
Ownership interest (as a percent) |  |  |  |  | 70.00% |
Port Arthur LNG | SI Partners and ConocoPhillips |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |
Funding commitment (in percent) |  |  | 110.00% |  |  |
Port Arthur LNG | SI Partners |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |
Guaranteed funding amount (in percent) |  |  | 70.00% |  |  |
Common stock |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |
Shares withheld for tax purposes (in shares) |  |  | 678,705 | 555,888 |  |
Shares withheld for tax purposes |  |  | $ 58.0 | $ 40.0 |  |
At The Market Program Offering |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |
Aggregate sales price |  |  |  |  |  | $ 3,000.0
Underwriting commission, percent |  |  |  |  |  | 1.00%
Aggregate sales price remaining |  |  | $ 2,600.0 |  |  |
Number of shares issued since inception (in shares) |  |  | 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 sold (in shares) |  | 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 (in shares) |  |  | 2,909,274 |  |  |
Q1 2025 Forward Sale Agreement |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |
Number of shares sold (in shares) | 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 (in shares) |  |  | 2,087,317 |  |  |

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