CONTINGENTLY REDEEMABLE NONCONTROLLING INTEREST (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2025	Sep. 30, 2025	Sep. 30, 2024
Redeemable Noncontrolling Interest [Line Items]
Proceeds from investor equity subscription	$ 106		$ 106	$ 0
Investor equity subscription	76	$ 76	76
Investor equity subscription		25	25
Income tax expense, sale of equity transaction	5
Contributions from CRNCI	3,166	3,166	3,166
Sale of equity interests, transaction costs	168
Allocation of interests		1,309	1,309
Allocation of interests		1,090	1,090
Income tax expense, allocation of interests		219	219
Non- controlling interests
Redeemable Noncontrolling Interest [Line Items]
Investor equity subscription	9	9	9
Allocation of interests		455	455
Sempra shareholders' equity
Redeemable Noncontrolling Interest [Line Items]
Investor equity subscription	16	16	16
Allocation of interests		635	635
Blackstone
Redeemable Noncontrolling Interest [Line Items]
Cash received from initial contribution	3,166
Sale of equity interests, transaction costs	122
Third Parties
Redeemable Noncontrolling Interest [Line Items]
Sale of equity interests, transaction costs	46
PA2 JVCo | Blackstone
Redeemable Noncontrolling Interest [Line Items]
Proceeds from sale of equity interests, subsidiary	3,400
Funding commitment in exchange for sale of equity interests	$ 3,600	$ 3,600	$ 3,600
SI Partners | Blackstone
Redeemable Noncontrolling Interest [Line Items]
Disqualifying events, right to call, percentage of fair market value	75.00%	75.00%	75.00%
SI Partners | PA2 JVCo
Redeemable Noncontrolling Interest [Line Items]
Funding commitment, construction project	$ 7,800	$ 7,800	$ 7,800
SI Partners | PA2 JVCo | Third-Party Sale, Proceeds Distribution, Period One
Redeemable Noncontrolling Interest [Line Items]
Third-party sale, proceeds distribution percentage			40.10%
SI Partners | PA2 JVCo | Third-Party Sale, Proceeds Distribution, Period Two
Redeemable Noncontrolling Interest [Line Items]
Third-party sale, proceeds distribution percentage			90.00%
SI Partners | PA2 JVCo | Quarterly Distribution, Earnings Allocation, Period One
Redeemable Noncontrolling Interest [Line Items]
Quarterly distribution, percentage	40.10%	40.10%	40.10%
SI Partners | PA2 JVCo | Quarterly Distribution, Earnings Allocation, Period Two
Redeemable Noncontrolling Interest [Line Items]
Quarterly distribution, percentage	50.10%	50.10%	50.10%
SI Partners | PA2 JVCo
Redeemable Noncontrolling Interest [Line Items]
Equity interests issued	49.90%	49.90%	49.90%
Ownership interest (as a percent)	50.10%	50.10%	50.10%
Sempra | PA LNG Phase 2 Project
Redeemable Noncontrolling Interest [Line Items]
Ownership percentage held by noncontrolling owners	35.10%	35.10%	35.10%
Blackstone | PA2 JVCo
Redeemable Noncontrolling Interest [Line Items]
Funding commitment, construction project	$ 7,000	$ 7,000	$ 7,000
Blackstone | PA2 JVCo | Third-Party Sale, Proceeds Distribution, Period One
Redeemable Noncontrolling Interest [Line Items]
Third-party sale, proceeds distribution percentage			59.90%
Blackstone | PA2 JVCo | Third-Party Sale, Proceeds Distribution, Period Two
Redeemable Noncontrolling Interest [Line Items]
Third-party sale, proceeds distribution percentage			10.00%
Blackstone | PA2 JVCo | Quarterly Distribution, Earnings Allocation, Period One
Redeemable Noncontrolling Interest [Line Items]
Quarterly distribution, percentage	59.90%	59.90%	59.90%
Blackstone | PA2 JVCo | Quarterly Distribution, Earnings Allocation, Period Two
Redeemable Noncontrolling Interest [Line Items]
Quarterly distribution, percentage	49.90%	49.90%	49.90%
Blackstone | PA LNG Phase 2 Project
Redeemable Noncontrolling Interest [Line Items]
Ownership percentage held by noncontrolling owners	49.90%	49.90%	49.90%
KKR Pinnacle | PA LNG Phase 2 Project
Redeemable Noncontrolling Interest [Line Items]
Ownership percentage held by noncontrolling owners	10.00%	10.00%	10.00%
ADIA | PA LNG Phase 2 Project
Redeemable Noncontrolling Interest [Line Items]
Ownership percentage held by noncontrolling owners	5.00%	5.00%	5.00%
Port Arthur LNG II | Shared Common Facilities
Redeemable Noncontrolling Interest [Line Items]
Equity ownership interest (as a percent)	50.00%	50.00%	50.00%
Port Arthur LNG II | Port Arthur LNG
Redeemable Noncontrolling Interest [Line Items]
Post-closing distribution, true-up payment to be received	$ 1,900
Port Arthur LNG II | Port Arthur LNG | Shared Common Facilities
Redeemable Noncontrolling Interest [Line Items]
Equity ownership interest (as a percent)	50.00%	50.00%	50.00%