GENERAL INFORMATION AND OTHER FINANCIAL DATA - SHAREHOLDERS’ EQUITY AND NONCONTROLLING INTERESTS NARRATIVE (Details) - USD ($) $ / shares in Units, $ in Millions					1 Months Ended		3 Months Ended		6 Months Ended
	Mar. 20, 2023	Jun. 01, 2022	Apr. 06, 2022	Jan. 11, 2022	Mar. 31, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Aug. 02, 2023	May 12, 2023	May 11, 2023	Dec. 31, 2022	Dec. 21, 2021	Oct. 01, 2021
Noncontrolling Interest [Line Items]
Common stock, shares authorized (in shares)							1,125,000,000		1,125,000,000			1,125,000,000	750,000,000	1,125,000,000
Increase in equity							$ 498.0	$ 7.0	$ 595.0	$ 13.0
Increase in shareholders' equity								$ 1,418.0	255.0	$ 1,418.0
Port Arthur LNG
Noncontrolling Interest [Line Items]
Increase in equity	$ 237.0
SI Partners
Noncontrolling Interest [Line Items]
Increase in shareholders' equity									186.0
Sale of noncontrolling interest, change in equity									134.0
Sempra Infrastructure | SI Partners
Noncontrolling Interest [Line Items]
Increase in shareholders' equity		$ 709.0
Sale of noncontrolling interest, change in equity		710.0
Sale of noncontrolling interest, transaction costs		12.0
Reduction to deferred income tax liability		300.0
Sale of noncontrolling interest, transaction costs reimbursed		$ 10.0
KKR Denali | SI Partners
Noncontrolling Interest [Line Items]
Cash consideration for minimum amount of interest transferred					$ 108.0
Share of development costs incurred, threshold					439.0
Termination fee					$ 130.0
Indirect Subsidiary Of SI Partners | Port Arthur LNG
Noncontrolling Interest [Line Items]
Cash consideration	265.0
Increase in shareholders' equity	18.0
Sale of noncontrolling interest, transaction costs	3.0
Sale of noncontrolling interest, tax impacts	7.0
Funding commitment, aggregate amount	$ 9,000.0
KKR | SI Partners
Noncontrolling Interest [Line Items]
Funding commitment, aggregate amount																$ 200.0
Funding used							$ 186.0		$ 186.0
Subsequent Event
Noncontrolling Interest [Line Items]
Common stock, shares authorized (in shares)											1,125,000,000
Port Arthur LNG | Indirect Subsidiary Of SI Partners
Noncontrolling Interest [Line Items]
Ownership interest (as a percent)	30.00%
Funding commitment (in percent)	110.00%
Guaranteed funding amount (in percent)	70.00%
Port Arthur LNG | Minimum | KKR Denali
Noncontrolling Interest [Line Items]
Ownership interest (as a percent)							19.60%		19.60%
SI Partners | Sempra Infrastructure
Noncontrolling Interest [Line Items]
Ownership interest (as a percent)							30.00%		30.00%					30.00%
SI Partners | KKR Denali
Noncontrolling Interest [Line Items]
Ownership percentage, minimum indirect interest transferred (in percent)						42.00%
SI Partners | Abu Dhabi Investment Authority
Noncontrolling Interest [Line Items]
Sale of noncontrolling interest (as a percent)															10.00%
Sale of noncontrolling interest, aggregate purchase price															$ 1,700.0
SI Partners | KKR
Noncontrolling Interest [Line Items]
Ownership interest (as a percent)															20.00%	20.00%
SI Partners | Abu Dhabi Investment Authority
Noncontrolling Interest [Line Items]
Ownership interest (as a percent)															10.00%
SI Partners | Sempra
Noncontrolling Interest [Line Items]
Ownership interest (as a percent)															70.00%
SI Partners subsidiaries | Minimum | Sempra Infrastructure
Noncontrolling Interest [Line Items]
Ownership interest (as a percent)							0.10%		0.10%					0.10%
SI Partners subsidiaries | Maximum | Sempra Infrastructure
Noncontrolling Interest [Line Items]
Ownership interest (as a percent)							30.00%		30.00%					16.60%
Common stock
Noncontrolling Interest [Line Items]
Share repurchase program, number of shares repurchased (in shares)			1,471,957	1,472,756					197,770	196,592
Common stock repurchased									$ 31.0	$ 26.0
Accelerated share repurchase program, prepaid amount			$ 250.0	$ 200.0
Common stock repurchased, average price (in dollars per share)			$ 169.84	$ 135.80