OTHER FINANCIAL DATA - GOODWILL (Details) (USD $) In Millions	Jun. 30, 2011		Dec. 31, 2010
Goodwill [Line Items]
Goodwill	$ 1,059		$ 87	[1]
Goodwill By Segment Sempra Pipelines And Storage [Member]
Goodwill [Line Items]
Goodwill	1,053	[2]	81
Goodwill By Segment Parent And Other [Member]
Goodwill [Line Items]
Goodwill	$ 6		$ 6

[1] Derived from audited financial statements.

[2] Includes $972 million at June 30, 2011 related to Chilquinta Energía and Luz del Sur, whose functional currencies are their local currencies. This causes the goodwill amount to fluctuate from period-to-period from the translation to U.S. dollars. We record the offset of this fluctuation to other comprehensive income.