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SUBSEQUENT EVENT (Details) (USD $) In Millions, unless otherwise specified	Jan. 31, 2014
Subsequent Event (Details) [Abstract]
Book Value Held For Sale	$ 287

X

- Definition

Book value held for sale

+ References

No definition available.

+ Details

Name:	sre_BookValueHeldForSale
Namespace Prefix:	sre_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	sre_SubsequentEventDetailsAbstract
Namespace Prefix:	sre_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration