SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT - FOOTNOTES (Details)	1 Months Ended				12 Months Ended
	Nov. 30, 2024 USD ($)	Sep. 30, 2024 USD ($)	May 31, 2024 USD ($)	Mar. 31, 2024 USD ($) business_day	Dec. 31, 2024 USD ($) lender	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Debt Instruments [Abstract]
Maximum borrowing capacity					$ 9,900,000,000
Committed lines of credit, capacity for issuance of letters of credit					200,000,000
Line of credit, increase limit					500,000,000
Letters of credit outstanding					497,000,000
Gross long-term debt					16,590,000,000	$ 12,207,000,000
Long-term debt					31,558,000,000	27,759,000,000
Long-term debt, maturity, year one					2,212,000,000
Long-term debt, maturity, year two					1,853,000,000
Long-term debt, maturity, year three					1,499,000,000
Long-term debt, maturity, year four					1,963,000,000
Long-term debt, maturity, year five					584,000,000
Thereafter					24,788,000,000
Operating leases
Total operating lease commitments					1,636,000,000
2025					142,000,000
2026					142,000,000
2027					134,000,000
2028					128,000,000
2029					124,000,000
Thereafter					966,000,000
Operating lease costs					$ 118,000,000	$ 99,000,000	$ 83,000,000
Operating lease, weighted-average discount rate (as a percent)					6.10%	6.64%
Maximum ratio of indebtedness to total capitalization					0.65
6.40% Junior Subordinated Notes, Due October 1, 2054
Debt Instruments [Abstract]
Stated percentage rate		6.40%
Parent Company
Basis of Presentation
Cash dividends received					$ 908,000,000	$ 1,900,000,000	832,000,000
Debt Instruments [Abstract]
Maximum borrowing capacity					4,000,000,000
Amount available					$ 4,000,000,000
Number of lenders | lender					23
Share of facility held by lenders (as a percent)					6.00%
Committed lines of credit, capacity for issuance of letters of credit					$ 200,000,000
Line of credit, increase limit					500,000,000
Letters of credit outstanding					0
Gross long-term debt					11,908,000,000	8,558,000,000
Current portion of long-term debt					(750,000,000)	0
Unamortized discount on long-term debt					(30,000,000)	(29,000,000)
Unamortized debt issuance costs					(100,000,000)	(68,000,000)
Long-term debt					11,028,000,000	8,461,000,000
Long-term debt, maturity, year one					750,000,000
Long-term debt, maturity, year two					550,000,000
Long-term debt, maturity, year three					750,000,000
Long-term debt, maturity, year four					1,000,000,000.0
Long-term debt, maturity, year five					500,000,000
Thereafter					8,400,000,000
Operating leases
Total operating lease commitments					212,000,000
2025					12,000,000
2026					12,000,000
2027					12,000,000
2029					13,000,000
Thereafter					151,000,000
Operating lease costs					$ 14,000,000	$ 14,000,000	$ 14,000,000
Operating lease, weighted-average discount rate (as a percent)					4.70%	4.70%
Maximum ratio of indebtedness to total capitalization					0.65
Parent Company | Corporate Headquarters
Operating leases
Total operating lease commitments					$ 147,000,000
Parent Company | 3.30% Notes April 1, 2025
Debt Instruments [Abstract]
Stated percentage rate					3.30%
Gross long-term debt					$ 750,000,000	$ 750,000,000
Parent Company | 5.40% Notes August 1, 2026
Debt Instruments [Abstract]
Stated percentage rate					5.40%
Gross long-term debt					$ 550,000,000	550,000,000
Parent Company | 3.25% Notes June 15, 2027
Debt Instruments [Abstract]
Stated percentage rate					3.25%
Gross long-term debt					$ 750,000,000	750,000,000
Parent Company | 3.40% Notes February 1, 2028
Debt Instruments [Abstract]
Stated percentage rate					3.40%
Gross long-term debt					$ 1,000,000,000	1,000,000,000
Parent Company | 3.70% Notes April 1, 2029
Debt Instruments [Abstract]
Stated percentage rate					3.70%
Gross long-term debt					$ 500,000,000	500,000,000
Parent Company | 5.50% Notes August 1, 2033
Debt Instruments [Abstract]
Gross long-term debt					$ 700,000,000	700,000,000
Parent Company | 3.80% Notes February 1, 2038
Debt Instruments [Abstract]
Stated percentage rate					3.80%
Gross long-term debt					$ 1,000,000,000	1,000,000,000
Parent Company | 6.00% Notes October 15, 2039
Debt Instruments [Abstract]
Stated percentage rate					6.00%
Gross long-term debt					$ 750,000,000	750,000,000
Parent Company | 4.00% Notes February 1, 2048
Debt Instruments [Abstract]
Stated percentage rate					4.00%
Gross long-term debt					$ 800,000,000	800,000,000
Parent Company | 4.125% Junior Subordinated Notes April 1, 2052
Debt Instruments [Abstract]
Stated percentage rate					4.125%
Gross long-term debt					$ 1,000,000,000	1,000,000,000
Parent Company | 5.75% Junior Subordinated Notes July 1, 2079
Debt Instruments [Abstract]
Gross long-term debt					$ 758,000,000	758,000,000
Parent Company | Other Long-Term Debt, Due August 2033
Debt Instruments [Abstract]
Stated percentage rate					5.50%
Parent Company | Other Long-Term Debt, 5.75% Junior Subordinated Notes July 1, 2079
Debt Instruments [Abstract]
Stated percentage rate				5.75%	5.75%
Parent Company | Junior Subordinated Notes 6.40% Due 2054
Debt Instruments [Abstract]
Stated percentage rate					6.40%
Gross long-term debt					$ 1,250,000,000	0
Parent Company | Junior Subordinated Notes 6.875% Due 2054
Debt Instruments [Abstract]
Stated percentage rate					6.875%
Gross long-term debt					$ 600,000,000	0
Parent Company | 6.875% Junior Subordinated Notes, Due October 1, 2054
Debt Instruments [Abstract]
Debt amount			$ 500,000,000
Proceeds from issuance of debt			489,000,000
Underwriting discounts and debt issuance costs			11,000,000
Accrued interest			$ 7,000,000
Number of days before interest rate period | business_day				2
Debt instrument, interest rate, period (in years)				5 years
Parent Company | Junior Subordinated Notes 6.875% Due 2054, Number 2
Debt Instruments [Abstract]
Stated percentage rate					6.875%
Gross long-term debt					$ 500,000,000	0
Parent Company | Junior Subordinated Notes 6.55% Due 2055
Debt Instruments [Abstract]
Stated percentage rate					6.55%
Gross long-term debt					$ 600,000,000	0
Parent Company | Junior Subordinated Notes 6.625% Due 2055
Debt Instruments [Abstract]
Stated percentage rate					6.625%
Gross long-term debt					$ 400,000,000	0
Parent Company | Other Long-Term Debt, 6.875% Junior Subordinated Notes October 1, 2054
Debt Instruments [Abstract]
Stated percentage rate			6.875%	6.875%
Debt amount				$ 600,000,000
Proceeds from issuance of debt				593,000,000
Underwriting discounts and debt issuance costs				$ 7,000,000
Parent Company | 6.40% Junior Subordinated Notes, Due October 1, 2054
Debt Instruments [Abstract]
Stated percentage rate		6.40%
Debt amount		$ 1,250,000,000
Proceeds from issuance of debt		1,235,000,000
Underwriting discounts and debt issuance costs		$ 15,000,000
Variable percentage rate		2.632%
Parent Company | Other Long-Term Debt, 6.625% Junior Subordinated Notes April 1, 2055
Debt Instruments [Abstract]
Stated percentage rate	6.625%
Debt amount	$ 400,000,000
Proceeds from issuance of debt	395,000,000
Underwriting discounts and debt issuance costs	$ 5,000,000
Variable percentage rate	2.354%
Parent Company | Other Long-Term Debt, 6.55% Junior Subordinated Notes April 1, 2055
Debt Instruments [Abstract]
Stated percentage rate	6.55%
Debt amount	$ 600,000,000
Proceeds from issuance of debt	593,000,000
Underwriting discounts and debt issuance costs	$ 7,000,000
Variable percentage rate	2.138%
Debt instrument, redemption price, percentage of principal amount redeemed (in percent)					100.00%
Parent Company | 6.875% Junior Subordinated Notes, Issued In March and May 2024
Debt Instruments [Abstract]
Variable percentage rate				2.789%
Sempra
Debt Instruments [Abstract]
Maximum borrowing capacity					$ 4,000,000,000
Other Sempra
Debt Instruments [Abstract]
Gross long-term debt					11,908,000,000	8,558,000,000
Unamortized discount on long-term debt					(78,000,000)	(66,000,000)
Unamortized debt issuance costs					(144,000,000)	(112,000,000)
Long-term debt					14,509,000,000	12,018,000,000
Variable percentage rate	2.354%	2.632%
Long-term debt, maturity, year one					1,862,000,000
Long-term debt, maturity, year two					599,000,000
Long-term debt, maturity, year three					799,000,000
Long-term debt, maturity, year four					1,358,000,000
Long-term debt, maturity, year five					584,000,000
Thereafter					$ 11,388,000,000
Other Sempra | 5.50% Senior Unsecured Notes August 1, 2033
Debt Instruments [Abstract]
Stated percentage rate					5.50%
Gross long-term debt					$ 700,000,000	700,000,000
Other Sempra | Other Long-Term Debt, 3.30% Notes April 1, 2025
Debt Instruments [Abstract]
Stated percentage rate					3.30%
Gross long-term debt					$ 750,000,000	750,000,000
Other Sempra | 5.40% Senior Unsecured Notes August 1, 2026
Debt Instruments [Abstract]
Stated percentage rate					5.40%
Gross long-term debt					$ 550,000,000	550,000,000
Other Sempra | Other Long-Term Debt, 3.25% Notes June 15, 2027
Debt Instruments [Abstract]
Stated percentage rate					3.25%
Gross long-term debt					$ 750,000,000	750,000,000
Other Sempra | Other Long-Term Debt, 3.40% Notes February 1, 2028
Debt Instruments [Abstract]
Stated percentage rate					3.40%
Gross long-term debt					$ 1,000,000,000	1,000,000,000
Other Sempra | Other Long-Term Debt, 3.70% Notes April 1, 2029
Debt Instruments [Abstract]
Stated percentage rate					3.70%
Gross long-term debt					$ 500,000,000	500,000,000
Other Sempra | Other Long-Term Debt, 5.75% Junior Subordinated Notes July 1, 2079
Debt Instruments [Abstract]
Stated percentage rate					5.75%
Gross long-term debt					$ 758,000,000	758,000,000
Other Sempra | 6.875% Junior Subordinated Notes, Due October 1, 2054
Debt Instruments [Abstract]
Debt amount			$ 500,000,000
Proceeds from issuance of debt			489,000,000
Underwriting discounts and debt issuance costs			11,000,000
Accrued interest			$ 7,000,000
Other Sempra | Other Long-Term Debt, 6.875% Junior Subordinated Notes October 1, 2054
Debt Instruments [Abstract]
Stated percentage rate					6.875%
Gross long-term debt					$ 600,000,000	0
Debt amount				$ 600,000,000
Proceeds from issuance of debt				593,000,000
Underwriting discounts and debt issuance costs				$ 7,000,000
Other Sempra | Other Long-Term Debt, 6.875% Junior Subordinated Notes October 1, 2054 | Period one
Debt Instruments [Abstract]
Debt instrument, redemption price, percentage of principal amount redeemed (in percent)			100.00%		100.00%
Other Sempra | Other Long-Term Debt, 6.875% Junior Subordinated Notes October 1, 2054 | Period two
Debt Instruments [Abstract]
Debt instrument, redemption price, percentage of principal amount redeemed (in percent)			102.00%	102.00%
Other Sempra | 6.40% Junior Subordinated Notes, Due October 1, 2054
Debt Instruments [Abstract]
Debt amount		$ 1,250,000,000
Proceeds from issuance of debt		1,235,000,000
Underwriting discounts and debt issuance costs		$ 15,000,000
Other Sempra | Other Long-Term Debt, 6.625% Junior Subordinated Notes April 1, 2055
Debt Instruments [Abstract]
Stated percentage rate	6.625%				6.625%
Gross long-term debt					$ 400,000,000	0
Debt amount	$ 400,000,000
Proceeds from issuance of debt	395,000,000
Underwriting discounts and debt issuance costs	$ 5,000,000
Other Sempra | Other Long-Term Debt, 6.55% Junior Subordinated Notes April 1, 2055
Debt Instruments [Abstract]
Stated percentage rate	6.55%				6.55%
Gross long-term debt					$ 600,000,000	0
Debt amount	$ 600,000,000
Proceeds from issuance of debt	593,000,000
Underwriting discounts and debt issuance costs	$ 7,000,000
Variable percentage rate	2.138%
Other Sempra | Other Long-Term Debt, 4.125% Junior Subordinated Notes April 1, 2052
Debt Instruments [Abstract]
Stated percentage rate				4.125%	4.125%
Gross long-term debt					$ 1,000,000,000	$ 1,000,000,000
Other Sempra | 6.875% Junior Subordinated Notes, Issued In March and May 2024
Debt Instruments [Abstract]
Variable percentage rate			2.789%