SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT - FOOTNOTES (Details)	1 Months Ended	12 Months Ended
	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) lender	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Debt Instruments [Abstract]
Total facility		$ 9,900,000,000
Line of credit, increase limit		500,000,000
Letters of credit outstanding		513,000,000
Gross long-term debt		12,207,000,000	$ 10,654,000,000
Long-term debt		27,759,000,000	24,548,000,000
Long-term debt, maturity, year two		2,001,000,000
Long-term debt, maturity, year three		1,854,000,000
Long-term debt, maturity, year four		1,499,000,000
Long-term debt, maturity, year five		1,954,000,000
Thereafter		19,497,000,000
Operating leases
Total operating lease commitments		1,000,000,000
2024		97,000,000
2025		87,000,000
2026		85,000,000
2027		75,000,000
2028		69,000,000
Thereafter		587,000,000
5.40% Notes August 1, 2026
Debt Instruments [Abstract]
Stated percentage rate	5.40%
Debt amount	$ 550,000,000
Proceeds from issuance of debt	545,000,000
Underwriting discounts and debt issuance costs	$ 5,000,000
5.50% Notes August 1, 2033
Debt Instruments [Abstract]
Stated percentage rate	5.50%
Debt amount	$ 700,000,000
Proceeds from issuance of debt	692,000,000
Underwriting discounts and debt issuance costs	$ 8,000,000
Parent Company
Debt Instruments [Abstract]
Letters of credit outstanding		0
Gross long-term debt		8,558,000,000	7,308,000,000
Unamortized discount on long-term debt		(29,000,000)	(28,000,000)
Unamortized debt issuance costs		(68,000,000)	(65,000,000)
Long-term debt		8,461,000,000	7,215,000,000
Operating leases
Total operating lease commitments		228,000,000
2024		12,000,000
2025		12,000,000
2026		12,000,000
2027		13,000,000
2028		13,000,000
Thereafter		$ 166,000,000
Parent Company | 3.3% 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	0
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 | 3.4% 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 | 3.7% 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]
Stated percentage rate		5.50%
Gross long-term debt		$ 700,000,000	0
Parent Company | 3.8% 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% 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% 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]
Stated percentage rate		5.75%
Gross long-term debt		$ 758,000,000	758,000,000
Sempra shareholders' equity
Debt Instruments [Abstract]
Long-term debt, maturity, year two		750,000,000
Long-term debt, maturity, year three		550,000,000
Long-term debt, maturity, year four		750,000,000
Long-term debt, maturity, year five		1,000,000,000
Thereafter		5,500,000,000
Sempra
Debt Instruments [Abstract]
Total facility		4,000,000,000
Sempra | Parent Company
Basis of Presentation
Cash dividends received		1,900,000,000	$ 832,000,000	$ 375,000,000
Debt Instruments [Abstract]
Total facility		4,000,000,000
Amount available		$ 3,634,000,000
Number of lenders | lender		23
Share of facility held by lenders (as a percent)		6.00%
Ratio of indebtedness to total capitalization (as a percent)		65.00%
Sempra Energy
Debt Instruments [Abstract]
Committed lines of credit, capacity for issuance of letters of credit		$ 200,000,000
Line of credit, increase limit		$ 500,000,000