DEBT AND CREDIT FACILITIES (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Line Of Credit Facility, Sempra Energy Consolidated [Member]
Line of Credit Facility [Line Items]
Committed lines of credit, maximum borrowing capacity	$ 4,100
Committed lines of credit, remaining borrowing capacity	$ 3,300
Weighted average interest rate on total short-term debt outstanding	0.66%	0.70%
Line Of Credit Facility, Sempra Energy [Member]
Line of Credit Facility [Line Items]
Committed lines of credit, maximum borrowing capacity	$ 1,067
Committed lines of credit, maximum ratio of indebtedness to total capitalization	65.00%
Committed lines of credit, capacity for issuance of letters of credit	$ 635
Committed lines of credit, outstanding borrowings	0
Amended And Restated Line Of Credit Facility Maximum Borrowing Capacity	1,000
Amended And Restated Credit Facility Letters Of Credit Capacity	400
Line Of Credit Facility, Sempra Global [Member]
Line of Credit Facility [Line Items]
Committed lines of credit, maximum borrowing capacity	$ 2,189
Committed lines of credit, maximum ratio of indebtedness to total capitalization	65.00%
Outstanding commercial paper supported by committed lines of credit	$ 734
Amended And Restated Line Of Credit Facility Maximum Borrowing Capacity	2,210
Line Of Credit Facility, S D G E [Member]
Line of Credit Facility [Line Items]
Committed lines of credit, maximum borrowing capacity	$ 658
Committed lines of credit, maximum ratio of indebtedness to total capitalization	65.00%
Committed lines of credit, remaining borrowing capacity	$ 614
Outstanding commercial paper supported by committed lines of credit	$ 44
Weighted average interest rate on total short-term debt outstanding	0.15%	0.27%
Amended And Restated Line Of Credit Facility Maximum Borrowing Capacity	$ 750
Line Of Credit Facility, So Cal Gas [Member]
Line of Credit Facility [Line Items]
Committed lines of credit, maximum borrowing capacity	$ 658
Committed lines of credit, maximum ratio of indebtedness to total capitalization	65.00%
Committed lines of credit, remaining borrowing capacity	$ 658
Outstanding letters of credit	0
Weighted average interest rate on total short-term debt outstanding		0.25%
Amended And Restated Line Of Credit Facility Maximum Borrowing Capacity	750
Line Of Credit Facility, California Utilities Combined [Member]
Line of Credit Facility [Line Items]
Committed lines of credit, maximum borrowing capacity	877
Committed lines of credit, capacity for issuance of letters of credit	300
Amended And Restated Line Of Credit Facility Maximum Borrowing Capacity	1,000
Amended And Restated Credit Facility Letters Of Credit Capacity	250
Line Of Credit Facility, South American Utilities And Mexico [Member]
Line of Credit Facility [Line Items]
Committed lines of credit, maximum borrowing capacity	945
Committed lines of credit, remaining borrowing capacity	485
Line Of Credit Facility, IEnova Santander [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility Maximum Borrowing Capacity Prior Limit	200
Line Of Credit Facility, IEnova Sumitomo [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility Maximum Borrowing Capacity Prior Limit	100
Line Of Credit Facility Sempra Mexico [Member]
Line of Credit Facility [Line Items]
Committed lines of credit, maximum borrowing capacity	400
Committed lines of credit, remaining borrowing capacity	110
Committed lines of credit, outstanding borrowings	290
Retired Debt Instrument, Face Amount	$ 210