DEBT AND CREDIT FACILITIES (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013 Line Of Credit Facility, Sempra Energy Consolidated [Member]	Dec. 31, 2012 Line Of Credit Facility, Sempra Energy Consolidated [Member]	Sep. 30, 2013 Line Of Credit Facility, Sempra Energy [Member]	Sep. 30, 2013 Line Of Credit Facility, Sempra Global [Member]	Dec. 31, 2012 Line Of Credit Facility, Sempra Global [Member]	Sep. 30, 2013 Line Of Credit Facility, S D G E [Member]	Sep. 30, 2013 Line Of Credit Facility, So Cal Gas [Member]	Sep. 30, 2013 Line Of Credit Facility, California Utilities Combined [Member]	Jun. 30, 2013 Line Of Credit Facility, Copper Mountain Solar 2 [Member]
Line of Credit Facility [Line Items]
Committed lines of credit, maximum borrowing capacity	$ 4,100		$ 1,067	$ 2,189		$ 658	$ 658	$ 877
Committed lines of credit, maximum ratio of indebtedness to total capitalization			65.00%	65.00%		65.00%	65.00%
Committed lines of credit, remaining borrowing capacity	3,600					658	658
Committed lines of credit, capacity for issuance of letters of credit			635					200	60
Outstanding commercial paper supported by committed lines of credit				445
Other instruments supported by committed lines of credit			12
Weighted average interest rate on total short-term debt outstanding	1.02%	0.72%
Commercial paper noncurrent					$ 300