OTHER FINANCIAL DATA - RESTRICTED CASH (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Presentation Of Restricted Cash [Line Items]
Restricted cash	$ 11,000,000	$ 24,000,000
Restricted Cash and Cash Equivalents, Noncurrent	29,000,000	25,000,000
Restricted cash, current and noncurrent	40,000,000	49,000,000
Restricted Cash, Construction Financing [Member] \| Sempra Mexico Segment [Member]
Presentation Of Restricted Cash [Line Items]
Restricted cash		12,000,000
Restricted Cash and Cash Equivalents, Noncurrent	18,000,000
Restricted Cash, Construction Financing [Member] \| Sempra Renewables Segment [Member]
Presentation Of Restricted Cash [Line Items]
Restricted cash	3,000,000	6,000,000
San Diego Gas and Electric Company [Member]
Presentation Of Restricted Cash [Line Items]
Restricted cash	8,000,000	6,000,000
Restricted Cash and Cash Equivalents, Noncurrent	11,000,000	25,000,000
San Diego Gas and Electric Company [Member] \| Restricted Cash, Operating Requirements [Member] \| S D G E Segment [Member]
Presentation Of Restricted Cash [Line Items]
Restricted cash	8,000,000	6,000,000
Restricted Cash and Cash Equivalents, Noncurrent	11,000,000	25,000,000
Restricted cash, current and noncurrent	$ 19,000,000	$ 31,000,000

- Definition

The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. For a classified balance sheet represents the current portion only (the noncurrent portion has a separate concept); there is a separate and distinct element for unclassified presentations.

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