DEBT AND CREDIT FACILITIES (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 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	0.72%	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
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	731
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	558
Outstanding commercial paper supported by committed lines of credit	100
Weighted average interest rate on total short-term debt outstanding		0.27%
Weighted Average Interest Rate On Commercial Paper, Noncurrent	0.40%
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%
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
Line Of Credit Facility, South American Utilities And Mexico [Member]
Line of Credit Facility [Line Items]
Committed lines of credit, maximum borrowing capacity	843
Committed lines of credit, remaining borrowing capacity	648
Line Of Credit Facility, IEnova Santander [Member]
Line of Credit Facility [Line Items]
Committed lines of credit, maximum borrowing capacity	200
Committed lines of credit, remaining borrowing capacity	150
Committed lines of credit, outstanding borrowings	50
Line Of Credit Facility, IEnova Sumitomo [Member]
Line of Credit Facility [Line Items]
Committed lines of credit, maximum borrowing capacity	100
Committed lines of credit, remaining borrowing capacity	75
Committed lines of credit, outstanding borrowings	$ 25