OTHER FINANCIAL DATA - TRANSACTIONS WITH AFFILIATES (Details) (USD $)	3 Months Ended			9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013	Sep. 30, 2014		Sep. 30, 2013	Dec. 31, 2013
Transactions With Affiliates Disclosure [Line Items]
Repayments of loans from affiliates	$ 18,000,000			$ 18,000,000
Sempra Renewables Segment [Member]
Transactions With Joint Venture [Line Items]
Receivables from joint venture investments	3,000,000			3,000,000			4,000,000
San Diego Gas and Electric Company and Subsidiary [Member]
Transactions With Affiliates Disclosure [Line Items]
Due to affiliate, current	36,000,000			36,000,000			39,000,000
Revenues from unconsolidated affiliates	2,000,000		3,000,000	8,000,000		8,000,000
Southern California Gas Company [Member]
Transactions With Affiliates Disclosure [Line Items]
Due from affiliate, current	274,000,000			274,000,000			21,000,000
Revenues from unconsolidated affiliates	17,000,000		17,000,000	51,000,000		48,000,000
Affiliate Of Investee [Member] | Southern California Gas Company [Member]
Transactions With Affiliates Disclosure [Line Items]
Due from affiliate, current	265,000,000	[1]		265,000,000	[1]		0	[1]
Interest rate on due from affiliate, noncurrent	0.08%
Loan to unconsolidated affiliate, principal	281,000,000			281,000,000
Due to/from Sempra Energy | San Diego Gas and Electric Company and Subsidiary [Member]
Transactions With Affiliates Disclosure [Line Items]
Due to affiliate, current	27,000,000			27,000,000			25,000,000
Income taxes due from (to) Sempra Energy	27,000,000	[2]		27,000,000	[2]		70,000,000	[2]
Due to/from Sempra Energy | Southern California Gas Company [Member]
Transactions With Affiliates Disclosure [Line Items]
Due to affiliate, current	0			0			16,000,000
Income taxes due from (to) Sempra Energy	21,000,000	[2]		21,000,000	[2]		18,000,000	[2]
Subsidiary Of Common Parent S D G E [Member] | Southern California Gas Company [Member]
Transactions With Affiliates Disclosure [Line Items]
Due from affiliate, current	9,000,000			9,000,000			0
Subsdiary Of Common Parent So Cal Gas [Member] | San Diego Gas and Electric Company and Subsidiary [Member]
Transactions With Affiliates Disclosure [Line Items]
Due to affiliate, current	9,000,000			9,000,000			0
Subsidiary Of Common Parent Other Affiliates [Member] | San Diego Gas and Electric Company and Subsidiary [Member]
Transactions With Affiliates Disclosure [Line Items]
Due from affiliate, current	1,000,000			1,000,000			1,000,000
Due to affiliate, current	0			0			14,000,000
Subsidiary Of Common Parent Other Affiliates [Member] | Southern California Gas Company [Member]
Transactions With Affiliates Disclosure [Line Items]
Due from affiliate, current	0			0			21,000,000
Joint venture with PEMEX [Member]
Transactions With Affiliates Disclosure [Line Items]
Interest rate on due from affiliate, noncurrent	4.66%
Loan to unconsolidated affiliate, principal	71,000,000			71,000,000
Loan to unconsolidated affiliate, accrued interest	1,000,000			1,000,000
ESJ joint venture [Member]
Transactions With Affiliates Disclosure [Line Items]
Interest rate on due from affiliate, noncurrent	6.53%
Loan to unconsolidated affiliate, principal	20,000,000			20,000,000
Loan to unconsolidated affiliate, accrued interest	1,000,000			1,000,000
Eletrans [Member]
Transactions With Affiliates Disclosure [Line Items]
Interest rate on due from affiliate, noncurrent	4.00%
Loan to unconsolidated affiliate, principal	39,000,000			39,000,000			14,000,000
Loan to unconsolidated affiliate, accrued interest	$ 1,000,000			$ 1,000,000

[1] Net receivable includes a loan to Sempra Energy of $281 million at September 30, 2014 at an interest rate of 0.08 percent.

[2] SDG&E and SoCalGas are included in the consolidated income tax return of Sempra Energy and are allocated income tax expense from Sempra Energy in an amount equal to that which would result from the companies’ having always filed separate returns.