FAIR VALUE MEASUREMENTS 4 (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of financial instruments, Total long-term debt	$ 12,346	[1]	$ 12,022	[1]
Preferred Stock Of Subsidiaries Fair Value Disclosure	20		20
Debt Instrument Unamortized Discount	21		17
Capital Lease Obligations	300		195
Commercial Paper Noncurrent	0		200
Carrying Amount | San Diego Gas and Electric Company and Subsidiary [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of financial instruments, Total long-term debt	4,463	[2]	4,386	[2]
Debt Instrument Unamortized Discount	10		11
Capital Lease Obligations	235		179
Carrying Amount | Southern California Gas Company [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of financial instruments, Total long-term debt	1,913	[3]	1,413	[3]
Preferred Stock Of Subsidiaries Fair Value Disclosure	22		22
Debt Instrument Unamortized Discount	7		4
Capital Lease Obligations			2
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of financial instruments, Total long-term debt	13,499	[1]	12,676	[1]
Preferred Stock Of Subsidiaries Fair Value Disclosure	23		20
Fair Value | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of financial instruments, Total long-term debt	0	[1]	0	[1]
Preferred Stock Of Subsidiaries Fair Value Disclosure	0		0
Fair Value | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of financial instruments, Total long-term debt	12,626	[1]	11,925	[1]
Preferred Stock Of Subsidiaries Fair Value Disclosure	23		20
Fair Value | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of financial instruments, Total long-term debt	873	[1]	751	[1]
Preferred Stock Of Subsidiaries Fair Value Disclosure	0		0
Fair Value | San Diego Gas and Electric Company and Subsidiary [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of financial instruments, Total long-term debt	4,890	[2]	4,561	[2]
Fair Value | San Diego Gas and Electric Company and Subsidiary [Member] | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of financial instruments, Total long-term debt	0	[2]	0	[2]
Fair Value | San Diego Gas and Electric Company and Subsidiary [Member] | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of financial instruments, Total long-term debt	4,463	[2]	4,226	[2]
Fair Value | San Diego Gas and Electric Company and Subsidiary [Member] | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of financial instruments, Total long-term debt	427	[2]	335	[2]
Fair Value | Southern California Gas Company [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of financial instruments, Total long-term debt	2,053	[3]	1,469	[3]
Preferred Stock Of Subsidiaries Fair Value Disclosure	24		22
Fair Value | Southern California Gas Company [Member] | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of financial instruments, Total long-term debt	0	[3]	0	[3]
Preferred Stock Of Subsidiaries Fair Value Disclosure	0		0
Fair Value | Southern California Gas Company [Member] | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of financial instruments, Total long-term debt	2,053	[3]	1,469	[3]
Preferred Stock Of Subsidiaries Fair Value Disclosure	24		22
Fair Value | Southern California Gas Company [Member] | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of financial instruments, Total long-term debt	0	[3]	0	[3]
Preferred Stock Of Subsidiaries Fair Value Disclosure	$ 0		$ 0

[1] Before reductions for unamortized discount (net of premium) of $21 million and $17 million at September 30, 2014 and December 31, 2013, respectively, and excluding build-to-suit and capital leases of $300 million and $195 million at September 30, 2014 and December 31, 2013, respectively, and commercial paper classified as long-term debt of $200 million at December 31, 2013. We discuss our long-term debt in Note 6 above and in Note 5 of the Notes to Consolidated Financial Statements in the Annual Report.

[2] Before reductions for unamortized discount of $10 million and $11 million at September 30, 2014 and December 31, 2013, respectively, and excluding capital leases of $235 million and $179 million at September 30, 2014 and December 31, 2013, respectively.

[3] Before reductions for unamortized discount of $7 million and $4 million at September 30, 2014 and December 31, 2013, respectively, and excluding capital leases of $2 million at December 31, 2013.