FAIR VALUE MEASUREMENTS 4 (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 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	$ 11,252	[1]	$ 12,022	[1]
Preferred Stock Of Subsidiaries Fair Value Disclosure	20		20
Debt Instrument Unamortized Discount	18		17
Capital Lease Obligations	263		195
Commercial Paper Noncurrent	300		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	4,383	[2]	4,386	[2]
Debt Instrument Unamortized Discount	11		11
Capital Lease Obligations	238		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	1,413	[3]	1,413	[3]
Preferred Stock Of Subsidiaries Fair Value Disclosure	22		22
Debt Instrument Unamortized Discount	5		4
Capital Lease Obligations	1		2
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of financial instruments, Total long-term debt	12,220	[1]	12,676	[1]
Preferred Stock Of Subsidiaries Fair Value Disclosure	21		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	11,444	[1]	11,925	[1]
Preferred Stock Of Subsidiaries Fair Value Disclosure	21		20
Fair Value | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of financial instruments, Total long-term debt	776	[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	4,712	[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	4,380	[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	332	[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	1,523	[3]	1,469	[3]
Preferred Stock Of Subsidiaries Fair Value Disclosure	23		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	1,523	[3]	1,469	[3]
Preferred Stock Of Subsidiaries Fair Value Disclosure	23		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 $18 million and $17 million at March 31, 2014 and December 31, 2013, respectively, and excluding build-to-suit and capital leases of $263 million and $195 million at March 31, 2014 and December 31, 2013, respectively, and commercial paper classified as long-term debt of $300 million and $200 million at March 31, 2014 and December 31, 2013, respectively. 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 $11 million at both March 31, 2014 and December 31, 2013, and excluding capital leases of $238 million and $179 million at March 31, 2014 and December 31, 2013, respectively.

[3] Before reductions for unamortized discount of $5 million and $4 million at March 31, 2014 and December 31, 2013, respectively, and excluding capital leases of $1 million and $2 million at March 31, 2014 and December 31, 2013, respectively.