OTHER FINANCIAL DATA - ASSET RETIREMENT OBLIGATIONS (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013
Asset Retirement Obligations [Line Items]
Asset Retirement Obligations, Balance as of January 1	$ 2,152	[1]	$ 2,056	[1]
Asset Retirement Obligation, Accretion Expense	73		74
Asset Retirement Obligation, Liabilities Incurred	3		4
Asset Retirement Obligation, Reclassification	(6)	[2]	0	[2]
Asset Retirement Obligation, Payments	(15)		(1)
Asset Retirement Obligation, Revisions, GRC- related	0	[3]	(135)	[3]
Asset Retirement Obligation, Revisions, Other	(34)	[4],[5]	181	[4],[5]
Asset Retirement Obligations, Balance as of June 30	2,173	[1]	2,179	[1]
San Diego Gas and Electric Company and Subsidiary [Member]
Asset Retirement Obligations [Line Items]
Asset Retirement Obligations, Balance as of January 1	913	[1]	741	[1]
Asset Retirement Obligation, Accretion Expense	33		35
Asset Retirement Obligation, Liabilities Incurred	0		0
Asset Retirement Obligation, Reclassification	0	[2]	0	[2]
Asset Retirement Obligation, Payments	(15)		0
Asset Retirement Obligation, Revisions, GRC- related	0	[3]	(30)	[3]
Asset Retirement Obligation, Revisions, Other	(59)	[4],[5]	207	[4],[5]
Asset Retirement Obligations, Balance as of June 30	872	[1]	953	[1]
Asset Retirement Obligations, Increase in Asset Service Lives, Beginning Rate			2.00%	[3]
Asset Retirement Obligations, Increase in Asset Service Lives, Ending Rate			7.00%	[3]
Southern California Gas Company [Member]
Asset Retirement Obligations [Line Items]
Asset Retirement Obligations, Balance as of January 1	1,199	[1]	1,253	[1]
Asset Retirement Obligation, Accretion Expense	38		37
Asset Retirement Obligation, Liabilities Incurred	0		0
Asset Retirement Obligation, Reclassification	0	[2]	0	[2]
Asset Retirement Obligation, Payments	0		0
Asset Retirement Obligation, Revisions, GRC- related	0	[3]	(105)	[3]
Asset Retirement Obligation, Revisions, Other	25	[4],[5]	0	[4],[5]
Asset Retirement Obligations, Balance as of June 30	$ 1,262	[1]	$ 1,185	[1]
Asset Retirement Obligations, Increase in Asset Service Lives, Beginning Rate			4.00%	[3]
Asset Retirement Obligations, Increase in Asset Service Lives, Ending Rate			6.00%	[3]

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

[2] Reclassification to liability held for sale - asset retirement obligation which is included in Other Current Liabilities on the Condensed Consolidated Balance Sheets, as we discuss in "Sempra Natural Gas – Asset Held for Sale, Power Plant" in Note 3 above.

[3] The decreases in asset retirement obligations in 2013 at SDG&E and SoCalGas were 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 included increases in asset service lives ranging from 4 percent to 6 percent, partially offset by a higher estimated cost of removal.

[4] 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).

[5] The decrease in asset retirement obligations in 2014 at SDG&E is due to revised estimates in an updated decommissioning cost study for the San Onofre Nuclear Generating Station, which we discuss in Note 9. The increase in asset retirement obligations in 2014 at SoCalGas is related to a change in estimates.