SEMPRA - EQUITY AND EARNINGS PER COMMON SHARE - NARRATIVE (Details)										12 Months Ended
	Feb. 27, 2024 USD ($) shares	Nov. 10, 2023 USD ($) $ / shares shares	Aug. 02, 2023 shares	Jun. 01, 2022 USD ($)	Apr. 06, 2022 USD ($) $ / shares shares	Jan. 11, 2022 USD ($) $ / shares shares	Nov. 17, 2021 USD ($) $ / shares shares	Oct. 01, 2021 USD ($)	Jul. 06, 2020 USD ($) shares	Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($) shares	Dec. 31, 2021 USD ($) shares	May 31, 2023 shares	May 30, 2023 shares	Dec. 21, 2021 USD ($)
Common stock, shares authorized (in shares) | shares			1,125,000,000							1,125,000,000	1,125,000,000		1,125,000,000	750,000,000
Stock split, conversion ratio			2						2
Resulting stock dividend (in percent)			100.00%						100.00%
Sale of stock, number of shares issued in transaction (in shares) | shares		19,242,010
Issuances of common stock, net		$ 144,000,000								$ 145,000,000	$ 4,000,000	$ 5,000,000
Payments of stock issuance costs		$ 3,000,000
Sales										1,234,000,000	1,419,000,000	2,712,000,000
SI Partners | Sempra Infrastructure
Sale of noncontrolling interest, purchase price								$ 3,400,000,000
Ownership percentage held by noncontrolling owners								20.00%
Sales				$ 709,000,000				$ 1,300,000,000
Sale of noncontrolling interest, change in equity				710,000,000				1,400,000,000
Sale of noncontrolling interest, transaction costs				12,000,000				173,000,000
Sale of noncontrolling interest, deferred income tax liability				300,000,000				490,000,000
Sale of noncontrolling interest, transaction costs reimbursed				$ 10,000,000				$ 149,000,000
Abu Dhabi Investment Authority | SI Partners
Sale of noncontrolling interest (as a percent)															10.00%
Sale of noncontrolling interest, purchase price															$ 1,700,000,000
Subsequent Event
Shares available for future settlement (in shares) | shares	17,142,858
Maximum amount of shares that may yet be purchased	$ 1,250,000,000
Shares may yet be purchased (in shares) | shares	19,632,529
Public Stock Offering
Sale of stock, number of shares issued in transaction (in shares) | shares		17,142,858
Par value (in usd per share) | $ / shares		$ 0
Sale of stock, price per share (in usd per share) | $ / shares		70.00
Sale of stock, price per share, after underwriting discounts (in usd per share) | $ / shares		$ 68.845
Over-Allotment Option [Member]
Sale of stock, number of shares issued in transaction (in shares) | shares		2,099,152
Common Stock
Stock repurchase program, authorized amount							$ 300,000,000		$ 2,000,000,000
Number of shares authorized to be repurchased (in shares) | shares									25,000,000
Common stock acquired (in shares)										$ 32,000,000	$ 28,000,000	$ 39,000,000
Common shares repurchased (in shares) | shares					2,943,914	2,945,512	4,845,516			412,594	406,512	624,102
Common shares repurchased, average price (in dollars per share) | $ / shares					$ 84.92	$ 67.90	$ 61.92
ASR program, amount prepaid					$ 250,000,000	$ 200,000,000