OTHER FINANCIAL DATA - ASSET RETIREMENT OBLIGATIONS (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012
Asset Retirement Obligations [Line Items]
Asset Retirement Obligations, Balance as of January 1	$ 2,056	[1]	$ 1,925	[1]
Asset Retirement Obligation, Accretion Expense	74		69
Asset Retirement Obligation, Liabilities Incurred	4		15
Asset Retirement Obligation, Payments	(1)		(1)
Asset Retirement Obligation, Revisions, GRC- related	(135)	[2]	(8)	[2]
Asset Retirement Obligation, Revisions, Other	181	[3]	0	[3]
Asset Retirement Obligations, Balance as of September 30	2,179	[1]	2,000	[1]
San Diego Gas and Electric Company and Subsidiary [Member]
Asset Retirement Obligations [Line Items]
Asset Retirement Obligations, Balance as of January 1	741	[1]	698	[1]
Asset Retirement Obligation, Accretion Expense	35		31
Asset Retirement Obligation, Liabilities Incurred	0		0
Asset Retirement Obligation, Payments	0		0
Asset Retirement Obligation, Revisions, GRC- related	(30)	[2]	0	[2]
Asset Retirement Obligation, Revisions, Other	207	[3]	0	[3]
Asset Retirement Obligations, Balance as of September 30	953	[1]	729	[1]
Asset Retirement Obligations, Increase in Asset Service Lives, Beginning Rate	2.00%
Asset Retirement Obligations, Increase in Asset Service Lives, Ending Rate	7.00%
Southern California Gas Company [Member]
Asset Retirement Obligations [Line Items]
Asset Retirement Obligations, Balance as of January 1	1,253	[1]	1,175	[1]
Asset Retirement Obligation, Accretion Expense	37		36
Asset Retirement Obligation, Liabilities Incurred	0		0
Asset Retirement Obligation, Payments	0		0
Asset Retirement Obligation, Revisions, GRC- related	(105)	[2]	0	[2]
Asset Retirement Obligation, Revisions, Other	0	[3]	0	[3]
Asset Retirement Obligations, Balance as of September 30	$ 1,185	[1]	$ 1,211	[1]
Asset Retirement Obligations, Increase in Asset Service Lives, Beginning Rate	4.00%
Asset Retirement Obligations, Increase in Asset Service Lives, Ending Rate	6.00%

[1] The current portions of the obligations are included in Other Current Liabilities on the Condensed Consolidated Balance Sheets.

[2] The decreases in asset retirement obligations in 2013 at SDG&E and SoCalGas are due to revised estimates related to the 2012 General Rate Case (GRC) that received final approval in May 2013. At SDG&E, these revisions included increases in asset service lives ranging from 2 percent to 7 percent, and lower estimated cost of removal. At SoCalGas, the decrease includes increases in asset service lives ranging from 4 percent to 6 percent, partially offset by a higher estimated cost of removal.

[3] The increase in asset retirement obligations in 2013 at SDG&E is due to revised estimates recorded in the third quarter of 2013 related to the early decommissioning of SONGS Units 2 and 3 (see Note 9).