SEMPRA - EQUITY AND EARNINGS PER COMMON SHARE - NARRATIVE (Details) - USD ($)					1 Months Ended			12 Months Ended
	Feb. 25, 2025	Dec. 31, 2024	Apr. 06, 2022	Jan. 11, 2022	Dec. 31, 2024	Nov. 30, 2023	Jun. 30, 2022	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Nov. 30, 2024	Dec. 21, 2021	Jul. 06, 2020
Common stock, shares authorized (in shares)		1,125,000,000			1,125,000,000			1,125,000,000	1,125,000,000
Sale of stock, number of shares issued in transaction (in shares)						19,242,010
Issuances of common stock, net						$ 144,000,000		$ 1,219,000,000	$ 145,000,000	$ 4,000,000
Payments of stock issuance costs		$ 2,000,000				$ 3,000,000
Sales									$ 1,234,000,000	$ 1,419,000,000
SI Partners | Sempra Infrastructure
Sales							$ 709,000,000
Sale of noncontrolling interest, change in equity							710,000,000
Sale of noncontrolling interest, transaction costs							12,000,000
Sale of noncontrolling interest, deferred income tax liability							300,000,000
Sale of noncontrolling interest, transaction costs reimbursed							$ 10,000,000
Abu Dhabi Investment Authority | SI Partners
Sale of noncontrolling interest, purchase price												$ 1,700,000,000
Ownership percentage held by noncontrolling owners												10.00%
Subsequent Event
Maximum amount of shares that may yet be purchased	$ 1,250,000,000
Shares may yet be purchased (in shares)	19,632,529
Public Stock Offering
Forward price per share (in usd per share)		$ 69.2195			$ 69.2195			$ 69.2195
Sale of stock, number of shares issued in transaction (in shares)					17,142,858	17,142,858
Par value (in usd per share)						$ 0
Sale of stock, price per share (in usd per share)						70.00
Sale of stock, price per share, after underwriting discounts (in usd per share)						$ 68.845
Issuances of common stock, net					$ 1,200,000,000
Payments of stock issuance costs					20,000,000
Over-Allotment Option
Sale of stock, number of shares issued in transaction (in shares)						2,099,152
At The Market Program Offering
Aggregate sales price											$ 3,000,000,000
Underwriting commission, percent											1.00%
Amount of stock available to be issued		$ 2,700,000,000			$ 2,700,000,000			$ 2,700,000,000
Number of shares available for issuance		2,909,274			2,909,274			2,909,274			2,909,274
Forward price per share (in usd per share)		$ 92.1546			$ 92.1546			$ 92.1546
Issuances of common stock, net		$ 268,000,000
Common Stock
Stock repurchase program, authorized amount													$ 2,000,000,000.0
Number of shares authorized to be repurchased (in shares)													25,000,000
Common shares repurchased (in shares)			2,943,914	2,945,512
Common shares repurchased, average price (in dollars per share)			$ 84.92	$ 67.90
ASR program, amount prepaid			$ 250,000,000	$ 200,000,000
Shares withheld for tax purposes (in shares)								689,303	412,594	406,512
Shares withheld for tax purposes								$ 43,000,000	$ 32,000,000	$ 28,000,000